diff options
| author | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-04-27 21:42:16 +0000 |
|---|---|---|
| committer | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-04-27 21:42:16 +0000 |
| commit | 2aa62f2bc9a9654687b377d9ca8a8c2c860a3852 (patch) | |
| tree | 62a0991a44327154fb88bf95bd6f7522053db7bb /StdLib/LibC/gdtoa | |
| parent | 98790d814871cc30bbd536673d3a0948047cd2f0 (diff) | |
| download | edk2-platforms-2aa62f2bc9a9654687b377d9ca8a8c2c860a3852.tar.xz | |
Standard Libraries for EDK II.
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc.
AppPkg contains applications that make use of the standard libraries defined in the StdLib Package.
StdLib contains header (include) files and the implementations of the standard libraries.
StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'StdLib/LibC/gdtoa')
| -rw-r--r-- | StdLib/LibC/gdtoa/Ipf/strtold.c | 18 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/_strtof.c | 46 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/_strtold.c | 47 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/atof.c | 22 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/dmisc.c | 228 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/dtoa.c | 821 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gdtoa.c | 814 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gdtoa.h | 159 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gdtoa.inf | 77 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gdtoaimp.h | 661 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gethex.c | 249 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/gmisc.c | 82 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/hd_init.c | 58 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/hexnan.c | 134 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/ldtoa.c | 113 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/misc.c | 909 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/smisc.c | 209 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtod.c | 1022 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtodg.c | 1075 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtof.c | 85 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtold_px.c | 4 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtold_subr.c | 45 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/strtopx.c | 108 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/sum.c | 105 | ||||
| -rw-r--r-- | StdLib/LibC/gdtoa/ulp.c | 73 |
25 files changed, 7164 insertions, 0 deletions
diff --git a/StdLib/LibC/gdtoa/Ipf/strtold.c b/StdLib/LibC/gdtoa/Ipf/strtold.c new file mode 100644 index 0000000000..0cddae36f4 --- /dev/null +++ b/StdLib/LibC/gdtoa/Ipf/strtold.c @@ -0,0 +1,18 @@ +/** @file
+ Wrapper for strtold so that it just calls strtod(). This is because the IPF implementation doesn't have
+ long double. (actually MS VC++ makes long double a distinct type that is identical to double.) VC++
+ also doesn't support the {strong, weak}_alias feature so we actually have to have an object.
+
+**/
+#include <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#include "namespace.h"
+#include "../gdtoaimp.h"
+#include "../gdtoa.h"
+
+long double
+strtold(const char * __restrict nptr, char ** __restrict endptr)
+{
+ return (long double)strtod( nptr, endptr);
+}
diff --git a/StdLib/LibC/gdtoa/_strtof.c b/StdLib/LibC/gdtoa/_strtof.c new file mode 100644 index 0000000000..50073350dc --- /dev/null +++ b/StdLib/LibC/gdtoa/_strtof.c @@ -0,0 +1,46 @@ +/* $NetBSD: _strtof.c,v 1.1 2006/03/15 17:35:18 kleink Exp $ */
+
+/*
+ * Copyright (c) 1996 Christos Zoulas. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Christos Zoulas.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#if defined(__indr_reference)
+__indr_reference(_strtof, strtof)
+#else
+
+#include <stdlib.h>
+float _strtof(const char * __restrict, char ** __restrict);
+
+float
+strtof(const char *nptr, char **endptr)
+{
+ return _strtof(nptr, endptr);
+}
+#endif
diff --git a/StdLib/LibC/gdtoa/_strtold.c b/StdLib/LibC/gdtoa/_strtold.c new file mode 100644 index 0000000000..f714b4e1ec --- /dev/null +++ b/StdLib/LibC/gdtoa/_strtold.c @@ -0,0 +1,47 @@ +/** @file
+ *
+ * Copyright (c) 1996 Christos Zoulas. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Christos Zoulas.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ NetBSD: _strtold.c,v 1.1 2006/03/15 17:35:18 kleink Exp
+**/
+#include <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#if defined(__indr_reference)
+ __indr_reference(_strtold, strtold)
+#else
+
+#include <stdlib.h>
+long double _strtold(const char * __restrict, char ** __restrict);
+
+long double
+strtold(const char *nptr, char **endptr)
+{
+ return _strtold(nptr, endptr);
+}
+#endif
diff --git a/StdLib/LibC/gdtoa/atof.c b/StdLib/LibC/gdtoa/atof.c new file mode 100644 index 0000000000..fe2b7f0889 --- /dev/null +++ b/StdLib/LibC/gdtoa/atof.c @@ -0,0 +1,22 @@ +/** @file
+ Convert a string into a floating-point double value.
+
+
+ Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#include <LibConfig.h>
+
+#include <stdlib.h>
+
+double
+atof(const char *string)
+{
+ return (strtod(string, NULL));
+}
diff --git a/StdLib/LibC/gdtoa/dmisc.c b/StdLib/LibC/gdtoa/dmisc.c new file mode 100644 index 0000000000..ff95b427fc --- /dev/null +++ b/StdLib/LibC/gdtoa/dmisc.c @@ -0,0 +1,228 @@ +/* $NetBSD: dmisc.c,v 1.2.4.1.4.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#ifndef MULTIPLE_THREADS
+ char *dtoa_result;
+#endif
+
+ char *
+#ifdef KR_headers
+rv_alloc(i) size_t i;
+#else
+rv_alloc(size_t i)
+#endif
+{
+ size_t j;
+ int k, *r;
+
+ j = sizeof(ULong);
+ for(k = 0;
+ sizeof(Bigint) - sizeof(ULong) - sizeof(int) + j <= i;
+ j <<= 1)
+ k++;
+ r = (int*)(void*)Balloc(k);
+ if (r == NULL)
+ return NULL;
+ *r = k;
+ return
+#ifndef MULTIPLE_THREADS
+ dtoa_result =
+#endif
+ (char *)(void *)(r+1);
+ }
+
+ char *
+#ifdef KR_headers
+nrv_alloc(s, rve, n) CONST char *s; char **rve; size_t n;
+#else
+nrv_alloc(CONST char *s, char **rve, size_t n)
+#endif
+{
+ char *rv, *t;
+
+ t = rv = rv_alloc(n);
+ if (t == NULL)
+ return NULL;
+ while((*t = *s++) !=0)
+ t++;
+ if (rve)
+ *rve = t;
+ return rv;
+ }
+
+/* freedtoa(s) must be used to free values s returned by dtoa
+ * when MULTIPLE_THREADS is #defined. It should be used in all cases,
+ * but for consistency with earlier versions of dtoa, it is optional
+ * when MULTIPLE_THREADS is not defined.
+ */
+
+ void
+#ifdef KR_headers
+freedtoa(s) char *s;
+#else
+freedtoa(char *s)
+#endif
+{
+ Bigint *b = (Bigint *)(void *)((int *)(void *)s - 1);
+ b->maxwds = 1 << (b->k = *(int*)(void*)b);
+ Bfree(b);
+#ifndef MULTIPLE_THREADS
+ if (s == dtoa_result)
+ dtoa_result = 0;
+#endif
+ }
+
+ int
+quorem
+#ifdef KR_headers
+ (b, S) Bigint *b, *S;
+#else
+ (Bigint *b, Bigint *S)
+#endif
+{
+ int n;
+ ULong *bx, *bxe, q, *sx, *sxe;
+#ifdef ULLong
+ ULLong borrow, carry, y, ys;
+#else
+ ULong borrow, carry, y, ys;
+#ifdef Pack_32
+ ULong si, z, zs;
+#endif
+#endif
+
+ n = S->wds;
+#ifdef DEBUG
+ /*debug*/ if (b->wds > n)
+ /*debug*/ Bug("oversize b in quorem");
+#endif
+ if (b->wds < n)
+ return 0;
+ sx = S->x;
+ sxe = sx + --n;
+ bx = b->x;
+ bxe = bx + n;
+ q = *bxe / (*sxe + 1); /* ensure q <= true quotient */
+#ifdef DEBUG
+ /*debug*/ if (q > 9)
+ /*debug*/ Bug("oversized quotient in quorem");
+#endif
+ if (q) {
+ borrow = 0;
+ carry = 0;
+ do {
+#ifdef ULLong
+ ys = *sx++ * (ULLong)q + carry;
+ carry = ys >> 32;
+ /* LINTED conversion */
+ y = *bx - (ys & 0xffffffffUL) - borrow;
+ borrow = y >> 32 & 1UL;
+ /* LINTED conversion */
+ *bx++ = (UINT32)(y & 0xffffffffUL);
+#else
+#ifdef Pack_32
+ si = *sx++;
+ ys = (si & 0xffff) * q + carry;
+ zs = (si >> 16) * q + (ys >> 16);
+ carry = zs >> 16;
+ y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ z = (*bx >> 16) - (zs & 0xffff) - borrow;
+ borrow = (z & 0x10000) >> 16;
+ Storeinc(bx, z, y);
+#else
+ ys = *sx++ * q + carry;
+ carry = ys >> 16;
+ y = *bx - (ys & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ *bx++ = y & 0xffff;
+#endif
+#endif
+ }
+ while(sx <= sxe);
+ if (!*bxe) {
+ bx = b->x;
+ while(--bxe > bx && !*bxe)
+ --n;
+ b->wds = n;
+ }
+ }
+ if (cmp(b, S) >= 0) {
+ q++;
+ borrow = 0;
+ carry = 0;
+ bx = b->x;
+ sx = S->x;
+ do {
+#ifdef ULLong
+ ys = *sx++ + carry;
+ carry = ys >> 32;
+ /* LINTED conversion */
+ y = *bx - (ys & 0xffffffffUL) - borrow;
+ borrow = y >> 32 & 1UL;
+ /* LINTED conversion */
+ *bx++ = (UINT32)(y & 0xffffffffUL);
+#else
+#ifdef Pack_32
+ si = *sx++;
+ ys = (si & 0xffff) + carry;
+ zs = (si >> 16) + (ys >> 16);
+ carry = zs >> 16;
+ y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ z = (*bx >> 16) - (zs & 0xffff) - borrow;
+ borrow = (z & 0x10000) >> 16;
+ Storeinc(bx, z, y);
+#else
+ ys = *sx++ + carry;
+ carry = ys >> 16;
+ y = *bx - (ys & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ *bx++ = y & 0xffff;
+#endif
+#endif
+ }
+ while(sx <= sxe);
+ bx = b->x;
+ bxe = bx + n;
+ if (!*bxe) {
+ while(--bxe > bx && !*bxe)
+ --n;
+ b->wds = n;
+ }
+ }
+ return (int)q;
+ }
diff --git a/StdLib/LibC/gdtoa/dtoa.c b/StdLib/LibC/gdtoa/dtoa.c new file mode 100644 index 0000000000..42098426fd --- /dev/null +++ b/StdLib/LibC/gdtoa/dtoa.c @@ -0,0 +1,821 @@ +/* $NetBSD: dtoa.c,v 1.3.4.1.4.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 1999 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+/* dtoa for IEEE arithmetic (dmg): convert double to ASCII string.
+ *
+ * Inspired by "How to Print Floating-Point Numbers Accurately" by
+ * Guy L. Steele, Jr. and Jon L. White [Proc. ACM SIGPLAN '90, pp. 112-126].
+ *
+ * Modifications:
+ * 1. Rather than iterating, we use a simple numeric overestimate
+ * to determine k = floor(log10(d)). We scale relevant
+ * quantities using O(log2(k)) rather than O(k) multiplications.
+ * 2. For some modes > 2 (corresponding to ecvt and fcvt), we don't
+ * try to generate digits strictly left to right. Instead, we
+ * compute with fewer bits and propagate the carry if necessary
+ * when rounding the final digit up. This is often faster.
+ * 3. Under the assumption that input will be rounded nearest,
+ * mode 0 renders 1e23 as 1e23 rather than 9.999999999999999e22.
+ * That is, we allow equality in stopping tests when the
+ * round-nearest rule will give the same floating-point value
+ * as would satisfaction of the stopping test with strict
+ * inequality.
+ * 4. We remove common factors of powers of 2 from relevant
+ * quantities.
+ * 5. When converting floating-point integers less than 1e16,
+ * we use floating-point arithmetic rather than resorting
+ * to multiple-precision integers.
+ * 6. When asked to produce fewer than 15 digits, we first try
+ * to get by with floating-point arithmetic; we resort to
+ * multiple-precision integer arithmetic only if we cannot
+ * guarantee that the floating-point calculation has given
+ * the correctly rounded result. For k requested digits and
+ * "uniformly" distributed input, the probability is
+ * something like 10^(k-15) that we must resort to the Long
+ * calculation.
+ */
+
+#ifdef Honor_FLT_ROUNDS
+#define Rounding rounding
+#undef Check_FLT_ROUNDS
+#define Check_FLT_ROUNDS
+#else
+#define Rounding Flt_Rounds
+#endif
+
+#if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */
+// Disable: warning C4700: uninitialized local variable 'xx' used
+#pragma warning ( disable : 4700 )
+#endif /* defined(_MSC_VER) */
+
+ char *
+dtoa
+#ifdef KR_headers
+ (d, mode, ndigits, decpt, sign, rve)
+ double d; int mode, ndigits, *decpt, *sign; char **rve;
+#else
+ (double d, int mode, int ndigits, int *decpt, int *sign, char **rve)
+#endif
+{
+ /* Arguments ndigits, decpt, sign are similar to those
+ of ecvt and fcvt; trailing zeros are suppressed from
+ the returned string. If not null, *rve is set to point
+ to the end of the return value. If d is +-Infinity or NaN,
+ then *decpt is set to 9999.
+
+ mode:
+ 0 ==> shortest string that yields d when read in
+ and rounded to nearest.
+ 1 ==> like 0, but with Steele & White stopping rule;
+ e.g. with IEEE P754 arithmetic , mode 0 gives
+ 1e23 whereas mode 1 gives 9.999999999999999e22.
+ 2 ==> max(1,ndigits) significant digits. This gives a
+ return value similar to that of ecvt, except
+ that trailing zeros are suppressed.
+ 3 ==> through ndigits past the decimal point. This
+ gives a return value similar to that from fcvt,
+ except that trailing zeros are suppressed, and
+ ndigits can be negative.
+ 4,5 ==> similar to 2 and 3, respectively, but (in
+ round-nearest mode) with the tests of mode 0 to
+ possibly return a shorter string that rounds to d.
+ With IEEE arithmetic and compilation with
+ -DHonor_FLT_ROUNDS, modes 4 and 5 behave the same
+ as modes 2 and 3 when FLT_ROUNDS != 1.
+ 6-9 ==> Debugging modes similar to mode - 4: don't try
+ fast floating-point estimate (if applicable).
+
+ Values of mode other than 0-9 are treated as mode 0.
+
+ Sufficient space is allocated to the return value
+ to hold the suppressed trailing zeros.
+ */
+
+ int bbits, b2, b5, be, dig, i, ieps, ilim0,
+ j, jj1, k, k0, k_check, leftright, m2, m5, s2, s5,
+ spec_case, try_quick;
+ int ilim = 0, ilim1 = 0; /* pacify gcc */
+ Long L;
+#ifndef Sudden_Underflow
+ int denorm;
+ ULong x;
+#endif
+ Bigint *b, *b1, *delta, *mhi, *S;
+ Bigint *mlo = NULL; /* pacify gcc */
+ double d2, ds, eps;
+ char *s, *s0;
+#ifdef Honor_FLT_ROUNDS
+ int rounding;
+#endif
+#ifdef SET_INEXACT
+ int inexact, oldinexact;
+#endif
+
+#ifndef MULTIPLE_THREADS
+ if (dtoa_result) {
+ freedtoa(dtoa_result);
+ dtoa_result = 0;
+ }
+#endif
+
+ if (word0(d) & Sign_bit) {
+ /* set sign for everything, including 0's and NaNs */
+ *sign = 1;
+ word0(d) &= ~Sign_bit; /* clear sign bit */
+ }
+ else
+ *sign = 0;
+
+#if defined(IEEE_Arith) + defined(VAX)
+#ifdef IEEE_Arith
+ if ((word0(d) & Exp_mask) == Exp_mask)
+#else
+ if (word0(d) == 0x8000)
+#endif
+ {
+ /* Infinity or NaN */
+ *decpt = 9999;
+#ifdef IEEE_Arith
+ if (!word1(d) && !(word0(d) & 0xfffff))
+ return nrv_alloc("Infinity", rve, 8);
+#endif
+ return nrv_alloc("NaN", rve, 3);
+ }
+#endif
+#ifdef IBM
+ dval(d) += 0; /* normalize */
+#endif
+ if (!dval(d)) {
+ *decpt = 1;
+ return nrv_alloc("0", rve, 1);
+ }
+
+#ifdef SET_INEXACT
+ try_quick = oldinexact = get_inexact();
+ inexact = 1;
+#endif
+#ifdef Honor_FLT_ROUNDS
+ if ((rounding = Flt_Rounds) >= 2) {
+ if (*sign)
+ rounding = rounding == 2 ? 0 : 2;
+ else
+ if (rounding != 2)
+ rounding = 0;
+ }
+#endif
+
+ b = d2b(dval(d), &be, &bbits);
+ if (b == NULL)
+ return NULL;
+#ifdef Sudden_Underflow
+ i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1));
+#else
+ if (( i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1)) )!=0) {
+#endif
+ dval(d2) = dval(d);
+ word0(d2) &= Frac_mask1;
+ word0(d2) |= Exp_11;
+#ifdef IBM
+ if (( j = 11 - hi0bits(word0(d2) & Frac_mask) )!=0)
+ dval(d2) /= 1 << j;
+#endif
+
+ /* log(x) ~=~ log(1.5) + (x-1.5)/1.5
+ * log10(x) = log(x) / log(10)
+ * ~=~ log(1.5)/log(10) + (x-1.5)/(1.5*log(10))
+ * log10(d) = (i-Bias)*log(2)/log(10) + log10(d2)
+ *
+ * This suggests computing an approximation k to log10(d) by
+ *
+ * k = (i - Bias)*0.301029995663981
+ * + ( (d2-1.5)*0.289529654602168 + 0.176091259055681 );
+ *
+ * We want k to be too large rather than too small.
+ * The error in the first-order Taylor series approximation
+ * is in our favor, so we just round up the constant enough
+ * to compensate for any error in the multiplication of
+ * (i - Bias) by 0.301029995663981; since |i - Bias| <= 1077,
+ * and 1077 * 0.30103 * 2^-52 ~=~ 7.2e-14,
+ * adding 1e-13 to the constant term more than suffices.
+ * Hence we adjust the constant term to 0.1760912590558.
+ * (We could get a more accurate k by invoking log10,
+ * but this is probably not worthwhile.)
+ */
+
+ i -= Bias;
+#ifdef IBM
+ i <<= 2;
+ i += j;
+#endif
+#ifndef Sudden_Underflow
+ denorm = 0;
+ }
+ else {
+ /* d is denormalized */
+
+ i = bbits + be + (Bias + (P-1) - 1);
+ x = i > 32 ? word0(d) << (64 - i) | word1(d) >> (i - 32)
+ : word1(d) << (32 - i);
+ dval(d2) = (double)x;
+ word0(d2) -= 31*Exp_msk1; /* adjust exponent */
+ i -= (Bias + (P-1) - 1) + 1;
+ denorm = 1;
+ }
+#endif
+ ds = (dval(d2)-1.5)*0.289529654602168 + 0.1760912590558 + i*0.301029995663981;
+ k = (int)ds;
+ if (ds < 0. && ds != k)
+ k--; /* want k = floor(ds) */
+ k_check = 1;
+ if (k >= 0 && k <= Ten_pmax) {
+ if (dval(d) < tens[k])
+ k--;
+ k_check = 0;
+ }
+ j = bbits - i - 1;
+ if (j >= 0) {
+ b2 = 0;
+ s2 = j;
+ }
+ else {
+ b2 = -j;
+ s2 = 0;
+ }
+ if (k >= 0) {
+ b5 = 0;
+ s5 = k;
+ s2 += k;
+ }
+ else {
+ b2 -= k;
+ b5 = -k;
+ s5 = 0;
+ }
+ if (mode < 0 || mode > 9)
+ mode = 0;
+
+#ifndef SET_INEXACT
+#ifdef Check_FLT_ROUNDS
+ try_quick = Rounding == 1;
+#else
+ try_quick = 1;
+#endif
+#endif /*SET_INEXACT*/
+
+ if (mode > 5) {
+ mode -= 4;
+ try_quick = 0;
+ }
+ leftright = 1;
+ switch(mode) {
+ case 0:
+ case 1:
+ ilim = ilim1 = -1;
+ i = 18;
+ ndigits = 0;
+ break;
+ case 2:
+ leftright = 0;
+ /* FALLTHROUGH */
+ case 4:
+ if (ndigits <= 0)
+ ndigits = 1;
+ ilim = ilim1 = i = ndigits;
+ break;
+ case 3:
+ leftright = 0;
+ /* FALLTHROUGH */
+ case 5:
+ i = ndigits + k + 1;
+ ilim = i;
+ ilim1 = i - 1;
+ if (i <= 0)
+ i = 1;
+ }
+ s = s0 = rv_alloc((size_t)i);
+ if (s == NULL)
+ return NULL;
+
+#ifdef Honor_FLT_ROUNDS
+ if (mode > 1 && rounding != 1)
+ leftright = 0;
+#endif
+
+ if (ilim >= 0 && ilim <= Quick_max && try_quick) {
+
+ /* Try to get by with floating-point arithmetic. */
+
+ i = 0;
+ dval(d2) = dval(d);
+ k0 = k;
+ ilim0 = ilim;
+ ieps = 2; /* conservative */
+ if (k > 0) {
+ ds = tens[k&0xf];
+ j = (unsigned int)k >> 4;
+ if (j & Bletch) {
+ /* prevent overflows */
+ j &= Bletch - 1;
+ dval(d) /= bigtens[n_bigtens-1];
+ ieps++;
+ }
+ for(; j; j = (unsigned int)j >> 1, i++)
+ if (j & 1) {
+ ieps++;
+ ds *= bigtens[i];
+ }
+ dval(d) /= ds;
+ }
+ else if (( jj1 = -k )!=0) {
+ dval(d) *= tens[jj1 & 0xf];
+ for(j = jj1 >> 4; j; j >>= 1, i++)
+ if (j & 1) {
+ ieps++;
+ dval(d) *= bigtens[i];
+ }
+ }
+ if (k_check && dval(d) < 1. && ilim > 0) {
+ if (ilim1 <= 0)
+ goto fast_failed;
+ ilim = ilim1;
+ k--;
+ dval(d) *= 10.;
+ ieps++;
+ }
+ dval(eps) = ieps*dval(d) + 7.;
+ word0(eps) -= (P-1)*Exp_msk1;
+ if (ilim == 0) {
+ S = mhi = 0;
+ dval(d) -= 5.;
+ if (dval(d) > dval(eps))
+ goto one_digit;
+ if (dval(d) < -dval(eps))
+ goto no_digits;
+ goto fast_failed;
+ }
+#ifndef No_leftright
+ if (leftright) {
+ /* Use Steele & White method of only
+ * generating digits needed.
+ */
+ dval(eps) = 0.5/tens[ilim-1] - dval(eps);
+ for(i = 0;;) {
+ L = (INT32)dval(d);
+ dval(d) -= L;
+ *s++ = (char)('0' + (int)L);
+ if (dval(d) < dval(eps))
+ goto ret1;
+ if (1. - dval(d) < dval(eps))
+ goto bump_up;
+ if (++i >= ilim)
+ break;
+ dval(eps) *= 10.;
+ dval(d) *= 10.;
+ }
+ }
+ else {
+#endif
+ /* Generate ilim digits, then fix them up. */
+ dval(eps) *= tens[ilim-1];
+ for(i = 1;; i++, dval(d) *= 10.) {
+ L = (Long)(dval(d));
+ if (!(dval(d) -= L))
+ ilim = i;
+ *s++ = (char)('0' + (int)L);
+ if (i == ilim) {
+ if (dval(d) > 0.5 + dval(eps))
+ goto bump_up;
+ else if (dval(d) < 0.5 - dval(eps)) {
+ while(*--s == '0');
+ s++;
+ goto ret1;
+ }
+ break;
+ }
+ }
+#ifndef No_leftright
+ }
+#endif
+ fast_failed:
+ s = s0;
+ dval(d) = dval(d2);
+ k = k0;
+ ilim = ilim0;
+ }
+
+ /* Do we have a "small" integer? */
+
+ if (be >= 0 && k <= Int_max) {
+ /* Yes. */
+ ds = tens[k];
+ if (ndigits < 0 && ilim <= 0) {
+ S = mhi = 0;
+ if (ilim < 0 || dval(d) <= 5*ds)
+ goto no_digits;
+ goto one_digit;
+ }
+ for(i = 1;; i++, dval(d) *= 10.) {
+ L = (Long)(dval(d) / ds);
+ dval(d) -= L*ds;
+#ifdef Check_FLT_ROUNDS
+ /* If FLT_ROUNDS == 2, L will usually be high by 1 */
+ if (dval(d) < 0) {
+ L--;
+ dval(d) += ds;
+ }
+#endif
+ *s++ = (char)('0' + (int)L);
+ if (!dval(d)) {
+#ifdef SET_INEXACT
+ inexact = 0;
+#endif
+ break;
+ }
+ if (i == ilim) {
+#ifdef Honor_FLT_ROUNDS
+ if (mode > 1)
+ switch(rounding) {
+ case 0: goto ret1;
+ case 2: goto bump_up;
+ }
+#endif
+ dval(d) += dval(d);
+ if (dval(d) > ds || (dval(d) == ds && L & 1)) {
+ bump_up:
+ while(*--s == '9')
+ if (s == s0) {
+ k++;
+ *s = '0';
+ break;
+ }
+ ++*s++;
+ }
+ break;
+ }
+ }
+ goto ret1;
+ }
+
+ m2 = b2;
+ m5 = b5;
+ mhi = mlo = 0;
+ if (leftright) {
+ i =
+#ifndef Sudden_Underflow
+ denorm ? be + (Bias + (P-1) - 1 + 1) :
+#endif
+#ifdef IBM
+ 1 + 4*P - 3 - bbits + ((bbits + be - 1) & 3);
+#else
+ 1 + P - bbits;
+#endif
+ b2 += i;
+ s2 += i;
+ mhi = i2b(1);
+ if (mhi == NULL)
+ return NULL;
+ }
+ if (m2 > 0 && s2 > 0) {
+ i = m2 < s2 ? m2 : s2;
+ b2 -= i;
+ m2 -= i;
+ s2 -= i;
+ }
+ if (b5 > 0) {
+ if (leftright) {
+ if (m5 > 0) {
+ mhi = pow5mult(mhi, m5);
+ if (mhi == NULL)
+ return NULL;
+ b1 = mult(mhi, b);
+ if (b1 == NULL)
+ return NULL;
+ Bfree(b);
+ b = b1;
+ }
+ if (( j = b5 - m5 )!=0)
+ b = pow5mult(b, j);
+ if (b == NULL)
+ return NULL;
+ }
+ else
+ b = pow5mult(b, b5);
+ if (b == NULL)
+ return NULL;
+ }
+ S = i2b(1);
+ if (S == NULL)
+ return NULL;
+ if (s5 > 0) {
+ S = pow5mult(S, s5);
+ if (S == NULL)
+ return NULL;
+ }
+
+ /* Check for special case that d is a normalized power of 2. */
+
+ spec_case = 0;
+ if ((mode < 2 || leftright)
+#ifdef Honor_FLT_ROUNDS
+ && rounding == 1
+#endif
+ ) {
+ if (!word1(d) && !(word0(d) & Bndry_mask)
+#ifndef Sudden_Underflow
+ && word0(d) & (Exp_mask & ~Exp_msk1)
+#endif
+ ) {
+ /* The special case */
+ b2 += Log2P;
+ s2 += Log2P;
+ spec_case = 1;
+ }
+ }
+
+ /* Arrange for convenient computation of quotients:
+ * shift left if necessary so divisor has 4 leading 0 bits.
+ *
+ * Perhaps we should just compute leading 28 bits of S once
+ * and for all and pass them and a shift to quorem, so it
+ * can do shifts and ors to compute the numerator for q.
+ */
+#ifdef Pack_32
+ if (( i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f )!=0)
+ i = 32 - i;
+#else
+ if (( i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0xf )!=0)
+ i = 16 - i;
+#endif
+ if (i > 4) {
+ i -= 4;
+ b2 += i;
+ m2 += i;
+ s2 += i;
+ }
+ else if (i < 4) {
+ i += 28;
+ b2 += i;
+ m2 += i;
+ s2 += i;
+ }
+ if (b2 > 0) {
+ b = lshift(b, b2);
+ if (b == NULL)
+ return NULL;
+ }
+ if (s2 > 0) {
+ S = lshift(S, s2);
+ if (S == NULL)
+ return NULL;
+ }
+ if (k_check) {
+ if (cmp(b,S) < 0) {
+ k--;
+ b = multadd(b, 10, 0); /* we botched the k estimate */
+ if (b == NULL)
+ return NULL;
+ if (leftright) {
+ mhi = multadd(mhi, 10, 0);
+ if (mhi == NULL)
+ return NULL;
+ }
+ ilim = ilim1;
+ }
+ }
+ if (ilim <= 0 && (mode == 3 || mode == 5)) {
+ if (ilim < 0 || cmp(b,S = multadd(S,5,0)) <= 0) {
+ /* no digits, fcvt style */
+ no_digits:
+ k = -1 - ndigits;
+ goto ret;
+ }
+ one_digit:
+ *s++ = '1';
+ k++;
+ goto ret;
+ }
+ if (leftright) {
+ if (m2 > 0) {
+ mhi = lshift(mhi, m2);
+ if (mhi == NULL)
+ return NULL;
+ }
+
+ /* Compute mlo -- check for special case
+ * that d is a normalized power of 2.
+ */
+
+ mlo = mhi;
+ if (spec_case) {
+ mhi = Balloc(mhi->k);
+ if (mhi == NULL)
+ return NULL;
+ Bcopy(mhi, mlo);
+ mhi = lshift(mhi, Log2P);
+ if (mhi == NULL)
+ return NULL;
+ }
+
+ for(i = 1;;i++) {
+ dig = quorem(b,S) + '0';
+ /* Do we yet have the shortest decimal string
+ * that will round to d?
+ */
+ j = cmp(b, mlo);
+ delta = diff(S, mhi);
+ if (delta == NULL)
+ return NULL;
+ jj1 = delta->sign ? 1 : cmp(b, delta);
+ Bfree(delta);
+#ifndef ROUND_BIASED
+ if (jj1 == 0 && mode != 1 && !(word1(d) & 1)
+#ifdef Honor_FLT_ROUNDS
+ && rounding >= 1
+#endif
+ ) {
+ if (dig == '9')
+ goto round_9_up;
+ if (j > 0)
+ dig++;
+#ifdef SET_INEXACT
+ else if (!b->x[0] && b->wds <= 1)
+ inexact = 0;
+#endif
+ *s++ = (char)dig;
+ goto ret;
+ }
+#endif
+ if (j < 0 || (j == 0 && mode != 1
+#ifndef ROUND_BIASED
+ && !(word1(d) & 1)
+#endif
+ )) {
+ if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+ inexact = 0;
+#endif
+ goto accept_dig;
+ }
+#ifdef Honor_FLT_ROUNDS
+ if (mode > 1)
+ switch(rounding) {
+ case 0: goto accept_dig;
+ case 2: goto keep_dig;
+ }
+#endif /*Honor_FLT_ROUNDS*/
+ if (jj1 > 0) {
+ b = lshift(b, 1);
+ if (b == NULL)
+ return NULL;
+ jj1 = cmp(b, S);
+ if ((jj1 > 0 || (jj1 == 0 && dig & 1))
+ && dig++ == '9')
+ goto round_9_up;
+ }
+ accept_dig:
+ *s++ = (char)dig;
+ goto ret;
+ }
+ if (jj1 > 0) {
+#ifdef Honor_FLT_ROUNDS
+ if (!rounding)
+ goto accept_dig;
+#endif
+ if (dig == '9') { /* possible if i == 1 */
+ round_9_up:
+ *s++ = '9';
+ goto roundoff;
+ }
+ *s++ = (char)(dig + 1);
+ goto ret;
+ }
+#ifdef Honor_FLT_ROUNDS
+ keep_dig:
+#endif
+ *s++ = (char)dig;
+ if (i == ilim)
+ break;
+ b = multadd(b, 10, 0);
+ if (b == NULL)
+ return NULL;
+ if (mlo == mhi) {
+ mlo = mhi = multadd(mhi, 10, 0);
+ if (mlo == NULL)
+ return NULL;
+ }
+ else {
+ mlo = multadd(mlo, 10, 0);
+ if (mlo == NULL)
+ return NULL;
+ mhi = multadd(mhi, 10, 0);
+ if (mhi == NULL)
+ return NULL;
+ }
+ }
+ }
+ else
+ for(i = 1;; i++) {
+ *s++ = (char)(dig = (int)(quorem(b,S) + '0'));
+ if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+ inexact = 0;
+#endif
+ goto ret;
+ }
+ if (i >= ilim)
+ break;
+ b = multadd(b, 10, 0);
+ if (b == NULL)
+ return NULL;
+ }
+
+ /* Round off last digit */
+
+#ifdef Honor_FLT_ROUNDS
+ switch(rounding) {
+ case 0: goto trimzeros;
+ case 2: goto roundoff;
+ }
+#endif
+ b = lshift(b, 1);
+ j = cmp(b, S);
+ if (j > 0 || (j == 0 && dig & 1)) {
+ roundoff:
+ while(*--s == '9')
+ if (s == s0) {
+ k++;
+ *s++ = '1';
+ goto ret;
+ }
+ ++*s++;
+ }
+ else {
+#ifdef Honor_FLT_ROUNDS
+ trimzeros:
+#endif
+ while(*--s == '0');
+ s++;
+ }
+ ret:
+ Bfree(S);
+ if (mhi) {
+ if (mlo && mlo != mhi)
+ Bfree(mlo);
+ Bfree(mhi);
+ }
+ ret1:
+#ifdef SET_INEXACT
+ if (inexact) {
+ if (!oldinexact) {
+ word0(d) = Exp_1 + (70 << Exp_shift);
+ word1(d) = 0;
+ dval(d) += 1.;
+ }
+ }
+ else if (!oldinexact)
+ clear_inexact();
+#endif
+ Bfree(b);
+ if (s == s0) { /* don't return empty string */
+ *s++ = '0';
+ k = 0;
+ }
+ *s = 0;
+ *decpt = k + 1;
+ if (rve)
+ *rve = s;
+ return s0;
+ }
diff --git a/StdLib/LibC/gdtoa/gdtoa.c b/StdLib/LibC/gdtoa/gdtoa.c new file mode 100644 index 0000000000..b1457c1470 --- /dev/null +++ b/StdLib/LibC/gdtoa/gdtoa.c @@ -0,0 +1,814 @@ +/* $NetBSD: gdtoa.c,v 1.1.1.1.4.1.4.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 1999 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#if defined(_MSC_VER)
+ /* Disable warnings about conversions to narrower data types. */
+ #pragma warning ( disable : 4244 )
+ // Squelch bogus warnings about uninitialized variable use.
+ #pragma warning ( disable : 4701 )
+#endif
+
+static Bigint *
+bitstob(ULong *bits, int nbits, int *bbits)
+{
+ int i, k;
+ Bigint *b;
+ ULong *be, *x, *x0;
+
+ i = ULbits;
+ k = 0;
+ while(i < nbits) {
+ i <<= 1;
+ k++;
+ }
+#ifndef Pack_32
+ if (!k)
+ k = 1;
+#endif
+ b = Balloc(k);
+ if (b == NULL)
+ return NULL;
+ be = bits + (((unsigned int)nbits - 1) >> kshift);
+ x = x0 = b->x;
+ do {
+ *x++ = *bits & ALL_ON;
+#ifdef Pack_16
+ *x++ = (*bits >> 16) & ALL_ON;
+#endif
+ } while(++bits <= be);
+ i = x - x0;
+ while(!x0[--i])
+ if (!i) {
+ b->wds = 0;
+ *bbits = 0;
+ goto ret;
+ }
+ b->wds = i + 1;
+ *bbits = i*ULbits + 32 - hi0bits(b->x[i]);
+ ret:
+ return b;
+ }
+
+/* dtoa for IEEE arithmetic (dmg): convert double to ASCII string.
+ *
+ * Inspired by "How to Print Floating-Point Numbers Accurately" by
+ * Guy L. Steele, Jr. and Jon L. White [Proc. ACM SIGPLAN '90, pp. 112-126].
+ *
+ * Modifications:
+ * 1. Rather than iterating, we use a simple numeric overestimate
+ * to determine k = floor(log10(d)). We scale relevant
+ * quantities using O(log2(k)) rather than O(k) multiplications.
+ * 2. For some modes > 2 (corresponding to ecvt and fcvt), we don't
+ * try to generate digits strictly left to right. Instead, we
+ * compute with fewer bits and propagate the carry if necessary
+ * when rounding the final digit up. This is often faster.
+ * 3. Under the assumption that input will be rounded nearest,
+ * mode 0 renders 1e23 as 1e23 rather than 9.999999999999999e22.
+ * That is, we allow equality in stopping tests when the
+ * round-nearest rule will give the same floating-point value
+ * as would satisfaction of the stopping test with strict
+ * inequality.
+ * 4. We remove common factors of powers of 2 from relevant
+ * quantities.
+ * 5. When converting floating-point integers less than 1e16,
+ * we use floating-point arithmetic rather than resorting
+ * to multiple-precision integers.
+ * 6. When asked to produce fewer than 15 digits, we first try
+ * to get by with floating-point arithmetic; we resort to
+ * multiple-precision integer arithmetic only if we cannot
+ * guarantee that the floating-point calculation has given
+ * the correctly rounded result. For k requested digits and
+ * "uniformly" distributed input, the probability is
+ * something like 10^(k-15) that we must resort to the Long
+ * calculation.
+ */
+
+ char *
+gdtoa
+ (FPI *fpi, int be, ULong *bits, int *kindp, int mode, int ndigits, int *decpt, char **rve)
+{
+ /* Arguments ndigits and decpt are similar to the second and third
+ arguments of ecvt and fcvt; trailing zeros are suppressed from
+ the returned string. If not null, *rve is set to point
+ to the end of the return value. If d is +-Infinity or NaN,
+ then *decpt is set to 9999.
+
+ mode:
+ 0 ==> shortest string that yields d when read in
+ and rounded to nearest.
+ 1 ==> like 0, but with Steele & White stopping rule;
+ e.g. with IEEE P754 arithmetic , mode 0 gives
+ 1e23 whereas mode 1 gives 9.999999999999999e22.
+ 2 ==> max(1,ndigits) significant digits. This gives a
+ return value similar to that of ecvt, except
+ that trailing zeros are suppressed.
+ 3 ==> through ndigits past the decimal point. This
+ gives a return value similar to that from fcvt,
+ except that trailing zeros are suppressed, and
+ ndigits can be negative.
+ 4-9 should give the same return values as 2-3, i.e.,
+ 4 <= mode <= 9 ==> same return as mode
+ 2 + (mode & 1). These modes are mainly for
+ debugging; often they run slower but sometimes
+ faster than modes 2-3.
+ 4,5,8,9 ==> left-to-right digit generation.
+ 6-9 ==> don't try fast floating-point estimate
+ (if applicable).
+
+ Values of mode other than 0-9 are treated as mode 0.
+
+ Sufficient space is allocated to the return value
+ to hold the suppressed trailing zeros.
+ */
+
+ int bbits, b2, b5, be0, dig, i, ieps, ilim = 0, ilim0, ilim1 = 0, inex;
+ int j, jj1, k, k0, k_check, kind, leftright, m2, m5, nbits;
+ int rdir, s2, s5, spec_case, try_quick;
+ Long L;
+ Bigint *b, *b1, *delta, *mlo, *mhi, *mhi1, *S;
+ double d, d2, ds, eps;
+ char *s, *s0;
+
+#ifndef MULTIPLE_THREADS
+ if (dtoa_result) {
+ freedtoa(dtoa_result);
+ dtoa_result = 0;
+ }
+#endif
+ inex = 0;
+ if (*kindp & STRTOG_NoMemory)
+ return NULL;
+ kind = *kindp &= ~STRTOG_Inexact;
+ switch(kind & STRTOG_Retmask) {
+ case STRTOG_Zero:
+ goto ret_zero;
+ case STRTOG_Normal:
+ case STRTOG_Denormal:
+ break;
+ case STRTOG_Infinite:
+ *decpt = -32768;
+ return nrv_alloc("Infinity", rve, 8);
+ case STRTOG_NaN:
+ *decpt = -32768;
+ return nrv_alloc("NaN", rve, 3);
+ default:
+ return 0;
+ }
+ b = bitstob(bits, nbits = fpi->nbits, &bbits);
+ if (b == NULL)
+ return NULL;
+ be0 = be;
+ if ( (i = trailz(b)) !=0) {
+ rshift(b, i);
+ be += i;
+ bbits -= i;
+ }
+ if (!b->wds) {
+ Bfree(b);
+ ret_zero:
+ *decpt = 1;
+ return nrv_alloc("0", rve, 1);
+ }
+
+ dval(d) = b2d(b, &i);
+ i = be + bbits - 1;
+ word0(d) &= Frac_mask1;
+ word0(d) |= Exp_11;
+#ifdef IBM
+ if ( (j = 11 - hi0bits(word0(d) & Frac_mask)) !=0)
+ dval(d) /= 1 << j;
+#endif
+
+ /* log(x) ~=~ log(1.5) + (x-1.5)/1.5
+ * log10(x) = log(x) / log(10)
+ * ~=~ log(1.5)/log(10) + (x-1.5)/(1.5*log(10))
+ * log10(d) = (i-Bias)*log(2)/log(10) + log10(d2)
+ *
+ * This suggests computing an approximation k to log10(d) by
+ *
+ * k = (i - Bias)*0.301029995663981
+ * + ( (d2-1.5)*0.289529654602168 + 0.176091259055681 );
+ *
+ * We want k to be too large rather than too small.
+ * The error in the first-order Taylor series approximation
+ * is in our favor, so we just round up the constant enough
+ * to compensate for any error in the multiplication of
+ * (i - Bias) by 0.301029995663981; since |i - Bias| <= 1077,
+ * and 1077 * 0.30103 * 2^-52 ~=~ 7.2e-14,
+ * adding 1e-13 to the constant term more than suffices.
+ * Hence we adjust the constant term to 0.1760912590558.
+ * (We could get a more accurate k by invoking log10,
+ * but this is probably not worthwhile.)
+ */
+#ifdef IBM
+ i <<= 2;
+ i += j;
+#endif
+ ds = (dval(d)-1.5)*0.289529654602168 + 0.1760912590558 + i*0.301029995663981;
+
+ /* correct assumption about exponent range */
+ if ((j = i) < 0)
+ j = -j;
+ if ((j -= 1077) > 0)
+ ds += j * 7e-17;
+
+ k = (int)ds;
+ if (ds < 0. && ds != k)
+ k--; /* want k = floor(ds) */
+ k_check = 1;
+#ifdef IBM
+ j = be + bbits - 1;
+ if ( (jj1 = j & 3) !=0)
+ dval(d) *= 1 << jj1;
+ word0(d) += j << Exp_shift - 2 & Exp_mask;
+#else
+ word0(d) += (be + bbits - 1) << Exp_shift;
+#endif
+ if (k >= 0 && k <= Ten_pmax) {
+ if (dval(d) < tens[k])
+ k--;
+ k_check = 0;
+ }
+ j = bbits - i - 1;
+ if (j >= 0) {
+ b2 = 0;
+ s2 = j;
+ }
+ else {
+ b2 = -j;
+ s2 = 0;
+ }
+ if (k >= 0) {
+ b5 = 0;
+ s5 = k;
+ s2 += k;
+ }
+ else {
+ b2 -= k;
+ b5 = -k;
+ s5 = 0;
+ }
+ if (mode < 0 || mode > 9)
+ mode = 0;
+ try_quick = 1;
+ if (mode > 5) {
+ mode -= 4;
+ try_quick = 0;
+ }
+ leftright = 1;
+ switch(mode) {
+ case 0:
+ case 1:
+ ilim = ilim1 = -1;
+ i = (int)(nbits * .30103) + 3;
+ ndigits = 0;
+ break;
+ case 2:
+ leftright = 0;
+ /*FALLTHROUGH*/
+ case 4:
+ if (ndigits <= 0)
+ ndigits = 1;
+ ilim = ilim1 = i = ndigits;
+ break;
+ case 3:
+ leftright = 0;
+ /*FALLTHROUGH*/
+ case 5:
+ i = ndigits + k + 1;
+ ilim = i;
+ ilim1 = i - 1;
+ if (i <= 0)
+ i = 1;
+ }
+ s = s0 = rv_alloc((size_t)i);
+ if (s == NULL)
+ return NULL;
+
+ if ( (rdir = fpi->rounding - 1) !=0) {
+ if (rdir < 0)
+ rdir = 2;
+ if (kind & STRTOG_Neg)
+ rdir = 3 - rdir;
+ }
+
+ /* Now rdir = 0 ==> round near, 1 ==> round up, 2 ==> round down. */
+
+ if (ilim >= 0 && ilim <= Quick_max && try_quick && !rdir
+#ifndef IMPRECISE_INEXACT
+ && k == 0
+#endif
+ ) {
+
+ /* Try to get by with floating-point arithmetic. */
+
+ i = 0;
+ d2 = dval(d);
+#ifdef IBM
+ if ( (j = 11 - hi0bits(word0(d) & Frac_mask)) !=0)
+ dval(d) /= 1 << j;
+#endif
+ k0 = k;
+ ilim0 = ilim;
+ ieps = 2; /* conservative */
+ if (k > 0) {
+ ds = tens[k&0xf];
+ j = (unsigned int)k >> 4;
+ if (j & Bletch) {
+ /* prevent overflows */
+ j &= Bletch - 1;
+ dval(d) /= bigtens[n_bigtens-1];
+ ieps++;
+ }
+ for(; j; j /= 2, i++)
+ if (j & 1) {
+ ieps++;
+ ds *= bigtens[i];
+ }
+ }
+ else {
+ ds = 1.;
+ if ( (jj1 = -k) !=0) {
+ dval(d) *= tens[jj1 & 0xf];
+ for(j = jj1 >> 4; j; j >>= 1, i++)
+ if (j & 1) {
+ ieps++;
+ dval(d) *= bigtens[i];
+ }
+ }
+ }
+ if (k_check && dval(d) < 1. && ilim > 0) {
+ if (ilim1 <= 0)
+ goto fast_failed;
+ ilim = ilim1;
+ k--;
+ dval(d) *= 10.;
+ ieps++;
+ }
+ dval(eps) = ieps*dval(d) + 7.;
+ word0(eps) -= (P-1)*Exp_msk1;
+ if (ilim == 0) {
+ S = mhi = 0;
+ dval(d) -= 5.;
+ if (dval(d) > dval(eps))
+ goto one_digit;
+ if (dval(d) < -dval(eps))
+ goto no_digits;
+ goto fast_failed;
+ }
+#ifndef No_leftright
+ if (leftright) {
+ /* Use Steele & White method of only
+ * generating digits needed.
+ */
+ dval(eps) = ds*0.5/tens[ilim-1] - dval(eps);
+ for(i = 0;;) {
+ L = (Long)(dval(d)/ds);
+ dval(d) -= L*ds;
+ *s++ = '0' + (int)L;
+ if (dval(d) < dval(eps)) {
+ if (dval(d))
+ inex = STRTOG_Inexlo;
+ goto ret1;
+ }
+ if (ds - dval(d) < dval(eps))
+ goto bump_up;
+ if (++i >= ilim)
+ break;
+ dval(eps) *= 10.;
+ dval(d) *= 10.;
+ }
+ }
+ else {
+#endif
+ /* Generate ilim digits, then fix them up. */
+ dval(eps) *= tens[ilim-1];
+ for(i = 1;; i++, dval(d) *= 10.) {
+ if ( (L = (Long)(dval(d)/ds)) !=0)
+ dval(d) -= L*ds;
+ *s++ = '0' + (int)L;
+ if (i == ilim) {
+ ds *= 0.5;
+ if (dval(d) > ds + dval(eps))
+ goto bump_up;
+ else if (dval(d) < ds - dval(eps)) {
+ while(*--s == '0'){}
+ s++;
+ if (dval(d))
+ inex = STRTOG_Inexlo;
+ goto ret1;
+ }
+ break;
+ }
+ }
+#ifndef No_leftright
+ }
+#endif
+ fast_failed:
+ s = s0;
+ dval(d) = d2;
+ k = k0;
+ ilim = ilim0;
+ }
+
+ /* Do we have a "small" integer? */
+
+ if (be >= 0 && k <= Int_max) {
+ /* Yes. */
+ ds = tens[k];
+ if (ndigits < 0 && ilim <= 0) {
+ S = mhi = 0;
+ if (ilim < 0 || dval(d) <= 5*ds)
+ goto no_digits;
+ goto one_digit;
+ }
+ for(i = 1;; i++, dval(d) *= 10.) {
+ L = dval(d) / ds;
+ dval(d) -= L*ds;
+#ifdef Check_FLT_ROUNDS
+ /* If FLT_ROUNDS == 2, L will usually be high by 1 */
+ if (dval(d) < 0) {
+ L--;
+ dval(d) += ds;
+ }
+#endif
+ *s++ = '0' + (int)L;
+ if (dval(d) == 0.)
+ break;
+ if (i == ilim) {
+ if (rdir) {
+ if (rdir == 1)
+ goto bump_up;
+ inex = STRTOG_Inexlo;
+ goto ret1;
+ }
+ dval(d) += dval(d);
+ if (dval(d) > ds || (dval(d) == ds && L & 1)) {
+ bump_up:
+ inex = STRTOG_Inexhi;
+ while(*--s == '9')
+ if (s == s0) {
+ k++;
+ *s = '0';
+ break;
+ }
+ ++*s++;
+ }
+ else
+ inex = STRTOG_Inexlo;
+ break;
+ }
+ }
+ goto ret1;
+ }
+
+ m2 = b2;
+ m5 = b5;
+ mhi = mlo = 0;
+ if (leftright) {
+ if (mode < 2) {
+ i = nbits - bbits;
+ if (be - i++ < fpi->emin)
+ /* denormal */
+ i = be - fpi->emin + 1;
+ }
+ else {
+ j = ilim - 1;
+ if (m5 >= j)
+ m5 -= j;
+ else {
+ s5 += j -= m5;
+ b5 += j;
+ m5 = 0;
+ }
+ if ((i = ilim) < 0) {
+ m2 -= i;
+ i = 0;
+ }
+ }
+ b2 += i;
+ s2 += i;
+ mhi = i2b(1);
+ }
+ if (m2 > 0 && s2 > 0) {
+ i = m2 < s2 ? m2 : s2;
+ b2 -= i;
+ m2 -= i;
+ s2 -= i;
+ }
+ if (b5 > 0) {
+ if (leftright) {
+ if (m5 > 0) {
+ mhi = pow5mult(mhi, m5);
+ if (mhi == NULL)
+ return NULL;
+ b1 = mult(mhi, b);
+ if (b1 == NULL)
+ return NULL;
+ Bfree(b);
+ b = b1;
+ }
+ if ( (j = b5 - m5) !=0) {
+ b = pow5mult(b, j);
+ if (b == NULL)
+ return NULL;
+ }
+ }
+ else {
+ b = pow5mult(b, b5);
+ if (b == NULL)
+ return NULL;
+ }
+ }
+ S = i2b(1);
+ if (S == NULL)
+ return NULL;
+ if (s5 > 0) {
+ S = pow5mult(S, s5);
+ if (S == NULL)
+ return NULL;
+ }
+
+ /* Check for special case that d is a normalized power of 2. */
+
+ spec_case = 0;
+ if (mode < 2) {
+ if (bbits == 1 && be0 > fpi->emin + 1) {
+ /* The special case */
+ b2++;
+ s2++;
+ spec_case = 1;
+ }
+ }
+
+ /* Arrange for convenient computation of quotients:
+ * shift left if necessary so divisor has 4 leading 0 bits.
+ *
+ * Perhaps we should just compute leading 28 bits of S once
+ * and for all and pass them and a shift to quorem, so it
+ * can do shifts and ors to compute the numerator for q.
+ */
+#ifdef Pack_32
+ if ( (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f) !=0)
+ i = 32 - i;
+#else
+ if ( (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0xf) !=0)
+ i = 16 - i;
+#endif
+ if (i > 4) {
+ i -= 4;
+ b2 += i;
+ m2 += i;
+ s2 += i;
+ }
+ else if (i < 4) {
+ i += 28;
+ b2 += i;
+ m2 += i;
+ s2 += i;
+ }
+ if (b2 > 0)
+ b = lshift(b, b2);
+ if (s2 > 0)
+ S = lshift(S, s2);
+ if (k_check) {
+ if (cmp(b,S) < 0) {
+ k--;
+ b = multadd(b, 10, 0); /* we botched the k estimate */
+ if (b == NULL)
+ return NULL;
+ if (leftright) {
+ mhi = multadd(mhi, 10, 0);
+ if (mhi == NULL)
+ return NULL;
+ }
+ ilim = ilim1;
+ }
+ }
+ if (ilim <= 0 && mode > 2) {
+ if (ilim < 0 || cmp(b,S = multadd(S,5,0)) <= 0) {
+ /* no digits, fcvt style */
+ no_digits:
+ k = -1 - ndigits;
+ inex = STRTOG_Inexlo;
+ goto ret;
+ }
+ one_digit:
+ inex = STRTOG_Inexhi;
+ *s++ = '1';
+ k++;
+ goto ret;
+ }
+ if (leftright) {
+ if (m2 > 0) {
+ mhi = lshift(mhi, m2);
+ if (mhi == NULL)
+ return NULL;
+ }
+
+ /* Compute mlo -- check for special case
+ * that d is a normalized power of 2.
+ */
+
+ mlo = mhi;
+ if (spec_case) {
+ mhi = Balloc(mhi->k);
+ if (mhi == NULL)
+ return NULL;
+ Bcopy(mhi, mlo);
+ mhi = lshift(mhi, 1);
+ if (mhi == NULL)
+ return NULL;
+ }
+
+ for(i = 1;;i++) {
+ dig = quorem(b,S) + '0';
+ /* Do we yet have the shortest decimal string
+ * that will round to d?
+ */
+ j = cmp(b, mlo);
+ delta = diff(S, mhi);
+ if (delta == NULL)
+ return NULL;
+ jj1 = delta->sign ? 1 : cmp(b, delta);
+ Bfree(delta);
+#ifndef ROUND_BIASED
+ if (jj1 == 0 && !mode && !(bits[0] & 1) && !rdir) {
+ if (dig == '9')
+ goto round_9_up;
+ if (j <= 0) {
+ if (b->wds > 1 || b->x[0])
+ inex = STRTOG_Inexlo;
+ }
+ else {
+ dig++;
+ inex = STRTOG_Inexhi;
+ }
+ *s++ = dig;
+ goto ret;
+ }
+#endif
+ if (j < 0 || (j == 0 && !mode
+#ifndef ROUND_BIASED
+ && !(bits[0] & 1)
+#endif
+ )) {
+ if (rdir && (b->wds > 1 || b->x[0])) {
+ if (rdir == 2) {
+ inex = STRTOG_Inexlo;
+ goto accept;
+ }
+ while (cmp(S,mhi) > 0) {
+ *s++ = dig;
+ mhi1 = multadd(mhi, 10, 0);
+ if (mhi1 == NULL)
+ return NULL;
+ if (mlo == mhi)
+ mlo = mhi1;
+ mhi = mhi1;
+ b = multadd(b, 10, 0);
+ if (b == NULL)
+ return NULL;
+ dig = quorem(b,S) + '0';
+ }
+ if (dig++ == '9')
+ goto round_9_up;
+ inex = STRTOG_Inexhi;
+ goto accept;
+ }
+ if (jj1 > 0) {
+ b = lshift(b, 1);
+ if (b == NULL)
+ return NULL;
+ jj1 = cmp(b, S);
+ if ((jj1 > 0 || (jj1 == 0 && dig & 1))
+ && dig++ == '9')
+ goto round_9_up;
+ inex = STRTOG_Inexhi;
+ }
+ if (b->wds > 1 || b->x[0])
+ inex = STRTOG_Inexlo;
+ accept:
+ *s++ = dig;
+ goto ret;
+ }
+ if (jj1 > 0 && rdir != 2) {
+ if (dig == '9') { /* possible if i == 1 */
+ round_9_up:
+ *s++ = '9';
+ inex = STRTOG_Inexhi;
+ goto roundoff;
+ }
+ inex = STRTOG_Inexhi;
+ *s++ = dig + 1;
+ goto ret;
+ }
+ *s++ = dig;
+ if (i == ilim)
+ break;
+ b = multadd(b, 10, 0);
+ if (b == NULL)
+ return NULL;
+ if (mlo == mhi) {
+ mlo = mhi = multadd(mhi, 10, 0);
+ if (mlo == NULL)
+ return NULL;
+ }
+ else {
+ mlo = multadd(mlo, 10, 0);
+ if (mlo == NULL)
+ return NULL;
+ mhi = multadd(mhi, 10, 0);
+ if (mhi == NULL)
+ return NULL;
+ }
+ }
+ }
+ else
+ for(i = 1;; i++) {
+ *s++ = dig = quorem(b,S) + '0';
+ if (i >= ilim)
+ break;
+ b = multadd(b, 10, 0);
+ if (b == NULL)
+ return NULL;
+ }
+
+ /* Round off last digit */
+
+ if (rdir) {
+ if (rdir == 2 || (b->wds <= 1 && !b->x[0]))
+ goto chopzeros;
+ goto roundoff;
+ }
+ b = lshift(b, 1);
+ if (b == NULL)
+ return NULL;
+ j = cmp(b, S);
+ if (j > 0 || (j == 0 && dig & 1)) {
+ roundoff:
+ inex = STRTOG_Inexhi;
+ while(*--s == '9')
+ if (s == s0) {
+ k++;
+ *s++ = '1';
+ goto ret;
+ }
+ ++*s++;
+ }
+ else {
+ chopzeros:
+ if (b->wds > 1 || b->x[0])
+ inex = STRTOG_Inexlo;
+ while(*--s == '0'){}
+ s++;
+ }
+ ret:
+ Bfree(S);
+ if (mhi) {
+ if (mlo && mlo != mhi)
+ Bfree(mlo);
+ Bfree(mhi);
+ }
+ ret1:
+ Bfree(b);
+ *s = 0;
+ *decpt = k + 1;
+ if (rve)
+ *rve = s;
+ *kindp |= inex;
+ return s0;
+ }
diff --git a/StdLib/LibC/gdtoa/gdtoa.h b/StdLib/LibC/gdtoa/gdtoa.h new file mode 100644 index 0000000000..82f126caf2 --- /dev/null +++ b/StdLib/LibC/gdtoa/gdtoa.h @@ -0,0 +1,159 @@ +/* $NetBSD: gdtoa.h,v 1.6.4.1.4.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+
+#ifndef GDTOA_H_INCLUDED
+#define GDTOA_H_INCLUDED
+#include <LibConfig.h>
+
+#include "arith.h"
+
+#ifndef Long
+#define Long EFI_LONG_T
+#endif
+#ifndef ULong
+#define ULong EFI_ULONG_T
+#endif
+#ifndef UShort
+#define UShort uint16_t
+#endif
+
+#ifndef ANSI
+#define ANSI(x) x
+#define Void void
+#endif /* ANSI */
+
+#ifndef CONST
+#define CONST const
+#endif /* CONST */
+
+enum { /* return values from strtodg */
+ STRTOG_Zero = 0,
+ STRTOG_Normal = 1,
+ STRTOG_Denormal = 2,
+ STRTOG_Infinite = 3,
+ STRTOG_NaN = 4,
+ STRTOG_NaNbits = 5,
+ STRTOG_NoNumber = 6,
+ STRTOG_Retmask = 7,
+
+ /* The following may be or-ed into one of the above values. */
+
+ STRTOG_Neg = 0x08,
+ STRTOG_Inexlo = 0x10,
+ STRTOG_Inexhi = 0x20,
+ STRTOG_Inexact = 0x30,
+ STRTOG_Underflow= 0x40,
+ STRTOG_Overflow = 0x80,
+ STRTOG_NoMemory = 0x100
+};
+
+ typedef struct
+FPI {
+ int nbits;
+ int emin;
+ int emax;
+ int rounding;
+ int sudden_underflow;
+} FPI;
+
+enum { /* FPI.rounding values: same as FLT_ROUNDS */
+ FPI_Round_zero = 0,
+ FPI_Round_near = 1,
+ FPI_Round_up = 2,
+ FPI_Round_down = 3
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define dtoa __dtoa
+#define gdtoa __gdtoa
+#define ldtoa __ldtoa
+#define hldtoa __hldtoa
+#define hdtoa __hdtoa
+#define freedtoa __freedtoa
+#define strtodg __strtodg_D2A
+#define strtopQ __strtopQ_D2A
+#define strtopx __strtopx_D2A
+#define strtopxL __strtopxL_D2A
+#define strtord __strtord_D2A
+
+extern char* dtoa ANSI((double d, int mode, int ndigits, int *decpt,
+ int *sign, char **rve));
+extern char* hdtoa ANSI((double d, const char *xdigs, int ndigits, int *decpt,
+ int *sign, char **rve));
+extern char* ldtoa ANSI((long double *ld, int mode, int ndigits, int *decpt,
+ int *sign, char **rve));
+extern char* hldtoa ANSI((long double e, const char *xdigs, int ndigits,
+ int *decpt, int *sign, char **rve));
+
+extern char* gdtoa ANSI((FPI *fpi, int be, ULong *bits, int *kindp,
+ int mode, int ndigits, int *decpt, char **rve));
+extern void freedtoa ANSI((char*));
+extern float strtof ANSI((CONST char *, char **));
+extern double strtod ANSI((CONST char *, char **));
+extern int strtodg ANSI((CONST char*, char**, CONST FPI*, Long*, ULong*));
+
+extern char* g_ddfmt ANSI((char*, double*, int, unsigned));
+extern char* g_dfmt ANSI((char*, double*, int, unsigned));
+extern char* g_ffmt ANSI((char*, float*, int, unsigned));
+extern char* g_Qfmt ANSI((char*, void*, int, unsigned));
+extern char* g_xfmt ANSI((char*, void*, int, unsigned));
+extern char* g_xLfmt ANSI((char*, void*, int, unsigned));
+
+extern int strtoId ANSI((CONST char*, char**, double*, double*));
+extern int strtoIdd ANSI((CONST char*, char**, double*, double*));
+extern int strtoIf ANSI((CONST char*, char**, float*, float*));
+extern int strtoIQ ANSI((CONST char*, char**, void*, void*));
+extern int strtoIx ANSI((CONST char*, char**, void*, void*));
+extern int strtoIxL ANSI((CONST char*, char**, void*, void*));
+extern int strtord ANSI((CONST char*, char**, int, double*));
+extern int strtordd ANSI((CONST char*, char**, int, double*));
+extern int strtorf ANSI((CONST char*, char**, int, float*));
+extern int strtorQ ANSI((CONST char*, char**, int, void*));
+extern int strtorx ANSI((CONST char*, char**, int, void*));
+extern int strtorxL ANSI((CONST char*, char**, int, void*));
+
+extern int strtodI ANSI((CONST char*, char**, double*));
+extern int strtopd ANSI((CONST char*, char**, double*));
+extern int strtopdd ANSI((CONST char*, char**, double*));
+extern int strtopf ANSI((CONST char*, char**, float*));
+extern int strtopQ ANSI((CONST char*, char**, void*));
+extern int strtopx ANSI((CONST char*, char**, void*));
+extern int strtopxL ANSI((CONST char*, char**, void*));
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* GDTOA_H_INCLUDED */
diff --git a/StdLib/LibC/gdtoa/gdtoa.inf b/StdLib/LibC/gdtoa/gdtoa.inf new file mode 100644 index 0000000000..fbe3ac1b63 --- /dev/null +++ b/StdLib/LibC/gdtoa/gdtoa.inf @@ -0,0 +1,77 @@ +## @file
+# This module contains source for a library of binary -> decimal
+# and decimal -> binary conversion routines, for single-, double-,
+# and extended-precision IEEE binary floating-point arithmetic, and
+# other IEEE-like binary floating-point, including "double double".
+#
+# Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php.
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = LibGdtoa
+ FILE_GUID = 5c98de6e-cb69-465f-b6b9-f661e26e6f9d
+ MODULE_TYPE = UEFI_APPLICATION
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = LibGdtoa
+
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF
+#
+
+[Sources.X64]
+ strtof.c
+ strtold_px.c
+ strtopx.c
+
+[Sources.IPF]
+ strtof.c
+ Ipf/strtold.c
+
+[Sources.IA32]
+ strtof.c
+ strtold_px.c
+ strtopx.c
+
+[Sources.ARM]
+ strtof.c
+
+[Sources]
+ strtod.c # Public interfaces
+ atof.c
+
+ # Private interfaces interfacing to libc
+ dtoa.c
+ ldtoa.c
+ gdtoa.c
+
+ # private interfaces
+ dmisc.c
+ gmisc.c
+ hd_init.c
+ hexnan.c
+ misc.c
+ smisc.c
+ strtodg.c
+ sum.c
+ ulp.c
+
+[Packages]
+ StdLib/StdLib.dec
+ StdLibPrivateInternalFiles/DoNotUse.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ LibC
+ LibLocale
+ LibStdLib
+ LibString
diff --git a/StdLib/LibC/gdtoa/gdtoaimp.h b/StdLib/LibC/gdtoa/gdtoaimp.h new file mode 100644 index 0000000000..635a177544 --- /dev/null +++ b/StdLib/LibC/gdtoa/gdtoaimp.h @@ -0,0 +1,661 @@ +/** @file
+ This is a variation on dtoa.c that converts arbitary binary
+ floating-point formats to and from decimal notation. It uses
+ double-precision arithmetic internally, so there are still
+ various #ifdefs that adapt the calculations to the native
+ double-precision arithmetic (any of IEEE, VAX D_floating,
+ or IBM mainframe arithmetic).
+
+ Please send bug reports to David M. Gay (dmg at acm dot org,
+ with " at " changed at "@" and " dot " changed to ".").
+
+ Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that accompanies this distribution.
+ The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ The author of this software is David M. Gay.
+
+ Copyright (C) 1998-2000 by Lucent Technologies
+ All Rights Reserved
+
+ Permission to use, copy, modify, and distribute this software and
+ its documentation for any purpose and without fee is hereby
+ granted, provided that the above copyright notice appear in all
+ copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of Lucent or any of its entities
+ not be used in advertising or publicity pertaining to
+ distribution of the software without specific, written prior
+ permission.
+
+ LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+ IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+ SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+ IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+ THIS SOFTWARE.
+
+$NetBSD: gdtoaimp.h,v 1.5.4.1 2007/05/07 19:49:06 pavel Exp
+**/
+
+/* On a machine with IEEE extended-precision registers, it is
+ * necessary to specify double-precision (53-bit) rounding precision
+ * before invoking strtod or dtoa. If the machine uses (the equivalent
+ * of) Intel 80x87 arithmetic, the call
+ * _control87(PC_53, MCW_PC);
+ * does this with many compilers. Whether this or another call is
+ * appropriate depends on the compiler; for this to work, it may be
+ * necessary to #include "float.h" or another system-dependent header
+ * file.
+ */
+
+/* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
+ *
+ * This strtod returns a nearest machine number to the input decimal
+ * string (or sets errno to ERANGE). With IEEE arithmetic, ties are
+ * broken by the IEEE round-even rule. Otherwise ties are broken by
+ * biased rounding (add half and chop).
+ *
+ * Inspired loosely by William D. Clinger's paper "How to Read Floating
+ * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 112-126].
+ *
+ * Modifications:
+ *
+ * 1. We only require IEEE, IBM, or VAX double-precision
+ * arithmetic (not IEEE double-extended).
+ * 2. We get by with floating-point arithmetic in a case that
+ * Clinger missed -- when we're computing d * 10^n
+ * for a small integer d and the integer n is not too
+ * much larger than 22 (the maximum integer k for which
+ * we can represent 10^k exactly), we may be able to
+ * compute (d*10^k) * 10^(e-k) with just one roundoff.
+ * 3. Rather than a bit-at-a-time adjustment of the binary
+ * result in the hard case, we use floating-point
+ * arithmetic to determine the adjustment to within
+ * one bit; only in really hard cases do we need to
+ * compute a second residual.
+ * 4. Because of 3., we don't need a large table of powers of 10
+ * for ten-to-e (just some small tables, e.g. of 10^k
+ * for 0 <= k <= 22).
+ */
+
+/*
+ * #define IEEE_LITTLE_ENDIAN for IEEE-arithmetic machines where the least
+ * significant byte has the lowest address.
+ * #define IEEE_BIG_ENDIAN for IEEE-arithmetic machines where the most
+ * significant byte has the lowest address.
+ * #define Long int on machines with 32-bit ints and 64-bit longs.
+ * #define Sudden_Underflow for IEEE-format machines without gradual
+ * underflow (i.e., that flush to zero on underflow).
+ * #define IBM for IBM mainframe-style floating-point arithmetic.
+ * #define VAX for VAX-style floating-point arithmetic (D_floating).
+ * #define No_leftright to omit left-right logic in fast floating-point
+ * computation of dtoa.
+ * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3.
+ * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
+ * that use extended-precision instructions to compute rounded
+ * products and quotients) with IBM.
+ * #define ROUND_BIASED for IEEE-format with biased rounding.
+ * #define Inaccurate_Divide for IEEE-format with correctly rounded
+ * products but inaccurate quotients, e.g., for Intel i860.
+ * #define NO_LONG_LONG on machines that do not have a "long long"
+ * integer type (of >= 64 bits). On such machines, you can
+ * #define Just_16 to store 16 bits per 32-bit Long when doing
+ * high-precision integer arithmetic. Whether this speeds things
+ * up or slows things down depends on the machine and the number
+ * being converted. If long long is available and the name is
+ * something other than "long long", #define Llong to be the name,
+ * and if "unsigned Llong" does not work as an unsigned version of
+ * Llong, #define #ULLong to be the corresponding unsigned type.
+ * #define KR_headers for old-style C function headers.
+ * #define Bad_float_h if your system lacks a float.h or if it does not
+ * define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
+ * FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
+ * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
+ * if memory is available and otherwise does something you deem
+ * appropriate. If MALLOC is undefined, malloc will be invoked
+ * directly -- and assumed always to succeed.
+ * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
+ * memory allocations from a private pool of memory when possible.
+ * When used, the private pool is PRIVATE_MEM bytes long: 2304 bytes,
+ * unless #defined to be a different length. This default length
+ * suffices to get rid of MALLOC calls except for unusual cases,
+ * such as decimal-to-binary conversion of a very long string of
+ * digits. When converting IEEE double precision values, the
+ * longest string gdtoa can return is about 751 bytes long. For
+ * conversions by strtod of strings of 800 digits and all gdtoa
+ * conversions of IEEE doubles in single-threaded executions with
+ * 8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with
+ * 4-byte pointers, PRIVATE_MEM >= 7112 appears adequate.
+ * #define INFNAN_CHECK on IEEE systems to cause strtod to check for
+ * Infinity and NaN (case insensitively).
+ * When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
+ * strtodg also accepts (case insensitively) strings of the form
+ * NaN(x), where x is a string of hexadecimal digits and spaces;
+ * if there is only one string of hexadecimal digits, it is taken
+ * for the fraction bits of the resulting NaN; if there are two or
+ * more strings of hexadecimal digits, each string is assigned
+ * to the next available sequence of 32-bit words of fractions
+ * bits (starting with the most significant), right-aligned in
+ * each sequence.
+ * #define MULTIPLE_THREADS if the system offers preemptively scheduled
+ * multiple threads. In this case, you must provide (or suitably
+ * #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
+ * by FREE_DTOA_LOCK(n) for n = 0 or 1. (The second lock, accessed
+ * in pow5mult, ensures lazy evaluation of only one copy of high
+ * powers of 5; omitting this lock would introduce a small
+ * probability of wasting memory, but would otherwise be harmless.)
+ * You must also invoke freedtoa(s) to free the value s returned by
+ * dtoa. You may do so whether or not MULTIPLE_THREADS is #defined.
+ * #define IMPRECISE_INEXACT if you do not care about the setting of
+ * the STRTOG_Inexact bits in the special case of doing IEEE double
+ * precision conversions (which could also be done by the strtog in
+ * dtoa.c).
+ * #define NO_HEX_FP to disable recognition of C9x's hexadecimal
+ * floating-point constants.
+ * #define -DNO_ERRNO to suppress setting errno (in strtod.c and
+ * strtodg.c).
+ * #define NO_STRING_H to use private versions of memcpy.
+ * On some K&R systems, it may also be necessary to
+ * #define DECLARE_SIZE_T in this case.
+ * #define YES_ALIAS to permit aliasing certain double values with
+ * arrays of ULongs. This leads to slightly better code with
+ * some compilers and was always used prior to 19990916, but it
+ * is not strictly legal and can cause trouble with aggressively
+ * optimizing compilers (e.g., gcc 2.95.1 under -O2).
+ * #define USE_LOCALE to use the current locale's decimal_point value.
+ */
+
+/* #define IEEE_{BIG,LITTLE}_ENDIAN in ${ARCHDIR}/gdtoa/arith.h */
+#include <LibConfig.h>
+
+#include <stdint.h>
+#define Short int16_t
+#define UShort uint16_t
+#define Long EFI_LONG_T
+#define ULong EFI_ULONG_T
+#define LLong int64_t
+#define ULLong uint64_t
+
+#define INFNAN_CHECK
+#ifdef _REENTRANT
+#define MULTIPLE_THREADS
+#endif
+#define USE_LOCALE
+
+#ifndef GDTOAIMP_H_INCLUDED
+#define GDTOAIMP_H_INCLUDED
+#include "gdtoa.h"
+#include "gd_qnan.h"
+
+#ifdef DEBUG
+#include "stdio.h"
+#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
+#endif
+
+#include "stdlib.h"
+#include "string.h"
+
+#ifdef KR_headers
+#define Char char
+#else
+#define Char void
+#endif
+
+#ifdef MALLOC
+extern Char *MALLOC ANSI((size_t));
+#else
+#define MALLOC malloc
+#endif
+
+#undef IEEE_Arith
+#undef Avoid_Underflow
+#ifdef IEEE_BIG_ENDIAN
+#define IEEE_Arith
+#endif
+#ifdef IEEE_LITTLE_ENDIAN
+#define IEEE_Arith
+#endif
+
+#include "errno.h"
+#ifdef Bad_float_h
+
+#ifdef IEEE_Arith
+#define DBL_DIG 15
+#define DBL_MAX_10_EXP 308
+#define DBL_MAX_EXP 1024
+#define FLT_RADIX 2
+#define DBL_MAX 1.7976931348623157e+308
+#endif
+
+#ifdef IBM
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 75
+#define DBL_MAX_EXP 63
+#define FLT_RADIX 16
+#define DBL_MAX 7.2370055773322621e+75
+#endif
+
+#ifdef VAX
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 38
+#define DBL_MAX_EXP 127
+#define FLT_RADIX 2
+#define DBL_MAX 1.7014118346046923e+38
+#define n_bigtens 2
+#endif
+
+#ifndef LONG_MAX
+#define LONG_MAX 2147483647
+#endif
+
+#else /* ifndef Bad_float_h */
+#include "float.h"
+#endif /* Bad_float_h */
+
+#ifdef IEEE_Arith
+#define Scale_Bit 0x10
+#define n_bigtens 5
+#endif
+
+#ifdef IBM
+#define n_bigtens 3
+#endif
+
+#ifdef VAX
+#define n_bigtens 2
+#endif
+
+#include "math.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(IEEE_LITTLE_ENDIAN) + defined(IEEE_BIG_ENDIAN) + defined(VAX) + defined(IBM) != 1
+Exactly one of IEEE_LITTLE_ENDIAN, IEEE_BIG_ENDIAN, VAX, or IBM should be defined.
+#endif
+
+typedef union { double d; ULong L[2]; } U;
+//typedef union { double d; UINT32 L[2]; } U;
+
+#ifdef YES_ALIAS
+#define dval(x) x
+#ifdef IEEE_LITTLE_ENDIAN
+#define word0(x) ((ULong *)&x)[1]
+#define word1(x) ((ULong *)&x)[0]
+#else
+#define word0(x) ((ULong *)&x)[0]
+#define word1(x) ((ULong *)&x)[1]
+#endif
+#else /* !YES_ALIAS */
+#ifdef IEEE_LITTLE_ENDIAN
+#define word0(x) ( /* LINTED */ (U*)&x)->L[1]
+#define word1(x) ( /* LINTED */ (U*)&x)->L[0]
+#else
+#define word0(x) ( /* LINTED */ (U*)&x)->L[0]
+#define word1(x) ( /* LINTED */ (U*)&x)->L[1]
+#endif
+#define dval(x) ( /* LINTED */ (U*)&x)->d
+#endif /* YES_ALIAS */
+
+/* The following definition of Storeinc is appropriate for MIPS processors.
+ * An alternative that might be better on some machines is
+ * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
+ */
+#if defined(IEEE_LITTLE_ENDIAN) + defined(VAX)
+#define Storeinc(a,b,c) \
+ (((unsigned short *)(void *)a)[1] = (unsigned short)b, \
+ ((unsigned short *)(void *)a)[0] = (unsigned short)c, \
+ a++)
+#else
+#define Storeinc(a,b,c) \
+ (((unsigned short *)(void *)a)[0] = (unsigned short)b, \
+ ((unsigned short *)(void *)a)[1] = (unsigned short)c, \
+ a++)
+#endif
+
+/* #define P DBL_MANT_DIG */
+/* Ten_pmax = floor(P*log(2)/log(5)) */
+/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
+/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
+/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
+
+#ifdef IEEE_Arith
+#define Exp_shift 20
+#define Exp_shift1 20
+#define Exp_msk1 0x100000
+#define Exp_msk11 0x100000
+#define Exp_mask 0x7ff00000
+#define P 53
+#define Bias 1023
+#define Emin (-1022)
+#define Exp_1 0x3ff00000
+#define Exp_11 0x3ff00000
+#define Ebits 11
+#define Frac_mask 0xfffffU
+#define Frac_mask1 0xfffffU
+#define Ten_pmax 22
+#define Bletch 0x10
+#define Bndry_mask 0xfffffU
+#define Bndry_mask1 0xfffffU
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 1
+#define Tiny0 0
+#define Tiny1 1
+#define Quick_max 14
+#define Int_max 14
+
+#ifndef Flt_Rounds
+#ifdef FLT_ROUNDS
+#define Flt_Rounds FLT_ROUNDS
+#else
+#define Flt_Rounds 1
+#endif
+#endif /*Flt_Rounds*/
+
+#else /* ifndef IEEE_Arith */
+#undef Sudden_Underflow
+#define Sudden_Underflow
+#ifdef IBM
+#undef Flt_Rounds
+#define Flt_Rounds 0
+#define Exp_shift 24
+#define Exp_shift1 24
+#define Exp_msk1 0x1000000
+#define Exp_msk11 0x1000000
+#define Exp_mask 0x7f000000
+#define P 14
+#define Bias 65
+#define Exp_1 0x41000000
+#define Exp_11 0x41000000
+#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
+#define Frac_mask 0xffffff
+#define Frac_mask1 0xffffff
+#define Bletch 4
+#define Ten_pmax 22
+#define Bndry_mask 0xefffff
+#define Bndry_mask1 0xffffff
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 4
+#define Tiny0 0x100000
+#define Tiny1 0
+#define Quick_max 14
+#define Int_max 15
+#else /* VAX */
+#undef Flt_Rounds
+#define Flt_Rounds 1
+#define Exp_shift 23
+#define Exp_shift1 7
+#define Exp_msk1 0x80
+#define Exp_msk11 0x800000
+#define Exp_mask 0x7f80
+#define P 56
+#define Bias 129
+#define Exp_1 0x40800000
+#define Exp_11 0x4080
+#define Ebits 8
+#define Frac_mask 0x7fffff
+#define Frac_mask1 0xffff007f
+#define Ten_pmax 24
+#define Bletch 2
+#define Bndry_mask 0xffff007f
+#define Bndry_mask1 0xffff007f
+#define LSB 0x10000
+#define Sign_bit 0x8000
+#define Log2P 1
+#define Tiny0 0x80
+#define Tiny1 0
+#define Quick_max 15
+#define Int_max 15
+#endif /* IBM, VAX */
+#endif /* IEEE_Arith */
+
+#ifndef IEEE_Arith
+#define ROUND_BIASED
+#endif
+
+#ifdef RND_PRODQUOT
+#define rounded_product(a,b) a = rnd_prod(a, b)
+#define rounded_quotient(a,b) a = rnd_quot(a, b)
+#ifdef KR_headers
+extern double rnd_prod(), rnd_quot();
+#else
+extern double rnd_prod(double, double), rnd_quot(double, double);
+#endif
+#else
+#define rounded_product(a,b) a *= b
+#define rounded_quotient(a,b) a /= b
+#endif
+
+#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
+#define Big1 0xffffffffU
+
+#undef Pack_16
+#ifndef Pack_32
+#define Pack_32
+#endif
+
+#ifdef NO_LONG_LONG
+#undef ULLong
+#ifdef Just_16
+#undef Pack_32
+#define Pack_16
+/* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
+ * This makes some inner loops simpler and sometimes saves work
+ * during multiplications, but it often seems to make things slightly
+ * slower. Hence the default is now to store 32 bits per Long.
+ */
+#endif
+#else /* long long available */
+#ifndef Llong
+#define Llong long long
+#endif
+#ifndef ULLong
+#define ULLong unsigned Llong
+#endif
+#endif /* NO_LONG_LONG */
+
+#ifdef Pack_32
+#define ULbits 32
+#define kshift 5
+#define kmask 31
+#define ALL_ON 0xffffffff
+#else
+#define ULbits 16
+#define kshift 4
+#define kmask 15
+#define ALL_ON 0xffff
+#endif
+
+#ifndef MULTIPLE_THREADS
+#define ACQUIRE_DTOA_LOCK(n) /*nothing*/
+#define FREE_DTOA_LOCK(n) /*nothing*/
+#else
+#include "reentrant.h"
+
+extern mutex_t __gdtoa_locks[2];
+
+#define ACQUIRE_DTOA_LOCK(n) \
+ do { \
+ if (__isthreaded) \
+ mutex_lock(&__gdtoa_locks[n]); \
+ } while (/* CONSTCOND */ 0)
+#define FREE_DTOA_LOCK(n) \
+ do { \
+ if (__isthreaded) \
+ mutex_unlock(&__gdtoa_locks[n]); \
+ } while (/* CONSTCOND */ 0)
+#endif
+
+#define Kmax 15
+
+ struct
+Bigint {
+ struct Bigint *next;
+ int k, maxwds, sign, wds;
+ ULong x[1];
+ };
+
+ typedef struct Bigint Bigint;
+
+#ifdef NO_STRING_H
+#ifdef DECLARE_SIZE_T
+typedef unsigned int size_t;
+#endif
+extern void memcpy_D2A ANSI((void*, const void*, size_t));
+#define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
+#else /* !NO_STRING_H */
+#define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
+#endif /* NO_STRING_H */
+
+#define Balloc __Balloc_D2A
+#define Bfree __Bfree_D2A
+#define ULtoQ __ULtoQ_D2A
+#define ULtof __ULtof_D2A
+#define ULtod __ULtod_D2A
+#define ULtodd __ULtodd_D2A
+#define ULtox __ULtox_D2A
+#define ULtoxL __ULtoxL_D2A
+#define any_on __any_on_D2A
+#define b2d __b2d_D2A
+#define bigtens __bigtens_D2A
+#define cmp __cmp_D2A
+#define copybits __copybits_D2A
+#define d2b __d2b_D2A
+#define decrement __decrement_D2A
+#define diff __diff_D2A
+#define dtoa_result __dtoa_result_D2A
+#define g__fmt __g__fmt_D2A
+#define gethex __gethex_D2A
+#define hexdig __hexdig_D2A
+#define hexdig_init_D2A __hexdig_init_D2A
+#define hexnan __hexnan_D2A
+#define hi0bits __hi0bits_D2A
+#define hi0bits_D2A __hi0bits_D2A
+#define i2b __i2b_D2A
+#define increment __increment_D2A
+#define lo0bits __lo0bits_D2A
+#define lshift __lshift_D2A
+#define match __match_D2A
+#define mult __mult_D2A
+#define multadd __multadd_D2A
+#define nrv_alloc __nrv_alloc_D2A
+#define pow5mult __pow5mult_D2A
+#define quorem __quorem_D2A
+#define ratio __ratio_D2A
+#define rshift __rshift_D2A
+#define rv_alloc __rv_alloc_D2A
+#define s2b __s2b_D2A
+#define set_ones __set_ones_D2A
+#define strcp __strcp_D2A
+#define strcp_D2A __strcp_D2A
+#define strtoIg __strtoIg_D2A
+#define sum __sum_D2A
+#define tens __tens_D2A
+#define tinytens __tinytens_D2A
+#define tinytens __tinytens_D2A
+#define trailz __trailz_D2A
+#define ulp __ulp_D2A
+
+extern char *dtoa_result;
+extern CONST double bigtens[], tens[], tinytens[];
+extern unsigned char hexdig[];
+
+extern Bigint *Balloc (int);
+extern void Bfree (Bigint*);
+extern void ULtof (ULong*, ULong*, Long, int);
+extern void ULtod (ULong*, ULong*, Long, int);
+extern void ULtodd (ULong*, ULong*, Long, int);
+extern void ULtoQ (ULong*, ULong*, Long, int);
+extern void ULtox (UShort*, ULong*, Long, int);
+extern void ULtoxL (ULong*, ULong*, Long, int);
+extern ULong any_on (Bigint*, int);
+extern double b2d (Bigint*, int*);
+extern int cmp (Bigint*, Bigint*);
+extern void copybits (ULong*, int, Bigint*);
+extern Bigint *d2b (double, int*, int*);
+extern int decrement (Bigint*);
+extern Bigint *diff (Bigint*, Bigint*);
+extern char *dtoa (double d, int mode, int ndigits,
+ int *decpt, int *sign, char **rve);
+extern char *g__fmt (char*, char*, char*, int, ULong);
+extern int gethex (CONST char**, CONST FPI*, Long*, Bigint**, int);
+extern void hexdig_init_D2A(Void);
+extern int hexnan (CONST char**, CONST FPI*, ULong*);
+extern int hi0bits_D2A (ULong);
+extern Bigint *i2b (int);
+extern Bigint *increment (Bigint*);
+extern int lo0bits (ULong*);
+extern Bigint *lshift (Bigint*, int);
+extern int match (CONST char**, CONST char*);
+extern Bigint *mult (Bigint*, Bigint*);
+extern Bigint *multadd (Bigint*, int, int);
+extern char *nrv_alloc (CONST char*, char **, size_t);
+extern Bigint *pow5mult (Bigint*, int);
+extern int quorem (Bigint*, Bigint*);
+extern double ratio (Bigint*, Bigint*);
+extern void rshift (Bigint*, int);
+extern char *rv_alloc (size_t);
+extern Bigint *s2b (CONST char*, int, int, ULong);
+extern Bigint *set_ones (Bigint*, int);
+extern char *strcp (char*, const char*);
+extern int strtoIg (CONST char*, char**, FPI*, Long*, Bigint**, int*);
+extern double strtod (const char *s00, char **se);
+extern Bigint *sum (Bigint*, Bigint*);
+extern int trailz (CONST Bigint*);
+extern double ulp (double);
+
+#ifdef __cplusplus
+}
+#endif
+/*
+ * NAN_WORD0 and NAN_WORD1 are only referenced in strtod.c. Prior to
+ * 20050115, they used to be hard-wired here (to 0x7ff80000 and 0,
+ * respectively), but now are determined by compiling and running
+ * qnan.c to generate gd_qnan.h, which specifies d_QNAN0 and d_QNAN1.
+ * Formerly gdtoaimp.h recommended supplying suitable -DNAN_WORD0=...
+ * and -DNAN_WORD1=... values if necessary. This should still work.
+ * (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
+ */
+#ifdef IEEE_Arith
+#ifdef IEEE_BIG_ENDIAN
+#define _0 0
+#define _1 1
+#ifndef NAN_WORD0
+#define NAN_WORD0 d_QNAN0
+#endif
+#ifndef NAN_WORD1
+#define NAN_WORD1 d_QNAN1
+#endif
+#else
+#define _0 1
+#define _1 0
+#ifndef NAN_WORD0
+#define NAN_WORD0 d_QNAN1
+#endif
+#ifndef NAN_WORD1
+#define NAN_WORD1 d_QNAN0
+#endif
+#endif
+#else
+#undef INFNAN_CHECK
+#endif
+
+#undef SI
+#ifdef Sudden_Underflow
+#define SI 1
+#else
+#define SI 0
+#endif
+
+#endif /* GDTOAIMP_H_INCLUDED */
diff --git a/StdLib/LibC/gdtoa/gethex.c b/StdLib/LibC/gdtoa/gethex.c new file mode 100644 index 0000000000..02920e748c --- /dev/null +++ b/StdLib/LibC/gdtoa/gethex.c @@ -0,0 +1,249 @@ +/* $NetBSD: gethex.c,v 1.3.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#ifdef USE_LOCALE
+#include "locale.h"
+#endif
+
+ int
+gethex( CONST char **sp, CONST FPI *fpi, Long *expt, Bigint **bp, int sign)
+{
+ Bigint *b;
+ CONST unsigned char *decpt, *s0, *s, *s1;
+ int esign, havedig, irv, k, n, nbits, up, zret;
+ ULong L, lostbits, *x;
+ Long e, e1;
+#ifdef USE_LOCALE
+ unsigned char decimalpoint = *localeconv()->decimal_point;
+#else
+#define decimalpoint '.'
+#endif
+
+ if (!hexdig['0'])
+ hexdig_init_D2A();
+ havedig = 0;
+ s0 = *(CONST unsigned char **)sp + 2;
+ while(s0[havedig] == '0')
+ havedig++;
+ s0 += havedig;
+ s = s0;
+ decpt = 0;
+ zret = 0;
+ e = 0;
+ if (!hexdig[*s]) {
+ zret = 1;
+ if (*s != decimalpoint)
+ goto pcheck;
+ decpt = ++s;
+ if (!hexdig[*s])
+ goto pcheck;
+ while(*s == '0')
+ s++;
+ if (hexdig[*s])
+ zret = 0;
+ havedig = 1;
+ s0 = s;
+ }
+ while(hexdig[*s])
+ s++;
+ if (*s == decimalpoint && !decpt) {
+ decpt = ++s;
+ while(hexdig[*s])
+ s++;
+ }
+ if (decpt)
+ e = -(((Long)(s-decpt)) << 2);
+ pcheck:
+ s1 = s;
+ switch(*s) {
+ case 'p':
+ case 'P':
+ esign = 0;
+ switch(*++s) {
+ case '-':
+ esign = 1;
+ /* FALLTHROUGH */
+ case '+':
+ s++;
+ }
+ if ((n = hexdig[*s]) == 0 || n > 0x19) {
+ s = s1;
+ break;
+ }
+ e1 = n - 0x10;
+ while((n = hexdig[*++s]) !=0 && n <= 0x19)
+ e1 = 10*e1 + n - 0x10;
+ if (esign)
+ e1 = -e1;
+ e += e1;
+ }
+ *sp = __UNCONST(s);
+ if (zret)
+ return havedig ? STRTOG_Zero : STRTOG_NoNumber;
+ n = (int)(s1 - s0 - 1);
+ for(k = 0; n > 7; n = (unsigned int)n >> 1)
+ k++;
+ b = Balloc(k);
+ if (b == NULL)
+ return STRTOG_NoMemory;
+ x = b->x;
+ n = 0;
+ L = 0;
+ while(s1 > s0) {
+ if (*--s1 == decimalpoint)
+ continue;
+ if (n == 32) {
+ *x++ = L;
+ L = 0;
+ n = 0;
+ }
+ L |= (hexdig[*s1] & 0x0f) << n;
+ n += 4;
+ }
+ *x++ = L;
+ b->wds = n = (int)(x - b->x);
+ n = 32*n - hi0bits(L);
+ nbits = fpi->nbits;
+ lostbits = 0;
+ x = b->x;
+ if (n > nbits) {
+ n -= nbits;
+ if (any_on(b,n)) {
+ lostbits = 1;
+ k = n - 1;
+ if (x[(unsigned int)k>>kshift] & 1 << (k & kmask)) {
+ lostbits = 2;
+ if (k > 1 && any_on(b,k-1))
+ lostbits = 3;
+ }
+ }
+ rshift(b, n);
+ e += n;
+ }
+ else if (n < nbits) {
+ n = nbits - n;
+ b = lshift(b, n);
+ if (b == NULL)
+ return STRTOG_NoMemory;
+ e -= n;
+ x = b->x;
+ }
+ if (e > fpi->emax) {
+ ovfl:
+ Bfree(b);
+ *bp = 0;
+ return STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
+ }
+ irv = STRTOG_Normal;
+ if (e < fpi->emin) {
+ irv = STRTOG_Denormal;
+ n = fpi->emin - e;
+ if (n >= nbits) {
+ switch (fpi->rounding) {
+ case FPI_Round_near:
+ if (n == nbits && (n < 2 || any_on(b,n-1)))
+ goto one_bit;
+ break;
+ case FPI_Round_up:
+ if (!sign)
+ goto one_bit;
+ break;
+ case FPI_Round_down:
+ if (sign) {
+ one_bit:
+ *expt = fpi->emin;
+ x[0] = b->wds = 1;
+ *bp = b;
+ return STRTOG_Denormal | STRTOG_Inexhi
+ | STRTOG_Underflow;
+ }
+ }
+ Bfree(b);
+ *bp = 0;
+ return STRTOG_Zero | STRTOG_Inexlo | STRTOG_Underflow;
+ }
+ k = n - 1;
+ if (lostbits)
+ lostbits = 1;
+ else if (k > 0)
+ lostbits = any_on(b,k);
+ if (x[(unsigned int)k>>kshift] & 1 << (k & kmask))
+ lostbits |= 2;
+ nbits -= n;
+ rshift(b,n);
+ e = fpi->emin;
+ }
+ if (lostbits) {
+ up = 0;
+ switch(fpi->rounding) {
+ case FPI_Round_zero:
+ break;
+ case FPI_Round_near:
+ if (lostbits & 2
+ && (lostbits & 1) | (x[0] & 1))
+ up = 1;
+ break;
+ case FPI_Round_up:
+ up = 1 - sign;
+ break;
+ case FPI_Round_down:
+ up = sign;
+ }
+ if (up) {
+ k = b->wds;
+ b = increment(b);
+ x = b->x;
+ if (irv == STRTOG_Denormal) {
+ if (nbits == fpi->nbits - 1
+ && x[(unsigned int)nbits >> kshift] & 1 << (nbits & kmask))
+ irv = STRTOG_Normal;
+ }
+ else if (b->wds > k
+ || ((n = nbits & kmask) !=0
+ && hi0bits(x[k-1]) < 32-n)) {
+ rshift(b,1);
+ if (++e > fpi->emax)
+ goto ovfl;
+ }
+ irv |= STRTOG_Inexhi;
+ }
+ else
+ irv |= STRTOG_Inexlo;
+ }
+ *bp = b;
+ *expt = e;
+ return irv;
+ }
diff --git a/StdLib/LibC/gdtoa/gmisc.c b/StdLib/LibC/gdtoa/gmisc.c new file mode 100644 index 0000000000..e185940ad8 --- /dev/null +++ b/StdLib/LibC/gdtoa/gmisc.c @@ -0,0 +1,82 @@ +/* $NetBSD: gmisc.c,v 1.3 2006/03/11 18:38:14 kleink Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+ void
+rshift(Bigint *b, int k)
+{
+ ULong *x, *x1, *xe, y;
+ int n;
+
+ x = x1 = b->x;
+ n = (unsigned int)k >> kshift;
+ if (n < b->wds) {
+ xe = x + b->wds;
+ x += n;
+ if (k &= kmask) {
+ n = ULbits - k;
+ y = *x++ >> k;
+ while(x < xe) {
+ *x1++ = (y | (*x << n)) & ALL_ON;
+ y = *x++ >> k;
+ }
+ if ((*x1 = y) !=0)
+ x1++;
+ }
+ else
+ while(x < xe)
+ *x1++ = *x++;
+ }
+ if ((b->wds = (int)(x1 - b->x)) == 0)
+ b->x[0] = 0;
+ }
+
+ int
+trailz(CONST Bigint *b)
+{
+ ULong L;
+ CONST ULong *x, *xe;
+ int n = 0;
+
+ x = b->x;
+ xe = x + b->wds;
+ for(n = 0; x < xe && !*x; x++)
+ n += ULbits;
+ if (x < xe) {
+ L = *x;
+ n += lo0bits(&L);
+ }
+ return n;
+ }
diff --git a/StdLib/LibC/gdtoa/hd_init.c b/StdLib/LibC/gdtoa/hd_init.c new file mode 100644 index 0000000000..bcf76c2468 --- /dev/null +++ b/StdLib/LibC/gdtoa/hd_init.c @@ -0,0 +1,58 @@ +/* $NetBSD: hd_init.c,v 1.2 2006/01/25 15:27:42 kleink Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 2000 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+ unsigned char hexdig[256];
+
+ static void
+#ifdef KR_headers
+htinit(h, s, inc) unsigned char *h; CONST unsigned char *s; int inc;
+#else
+htinit(unsigned char *h, CONST unsigned char *s, int inc)
+#endif
+{
+ int i, j;
+ for(i = 0; (j = s[i]) !=0; i++)
+ h[j] = (unsigned char)(i + inc);
+ }
+
+ void
+hexdig_init_D2A(Void)
+{
+#define USC (CONST unsigned char *)
+ htinit(hexdig, USC "0123456789", 0x10);
+ htinit(hexdig, USC "abcdef", 0x10 + 10);
+ htinit(hexdig, USC "ABCDEF", 0x10 + 10);
+ }
diff --git a/StdLib/LibC/gdtoa/hexnan.c b/StdLib/LibC/gdtoa/hexnan.c new file mode 100644 index 0000000000..971e217552 --- /dev/null +++ b/StdLib/LibC/gdtoa/hexnan.c @@ -0,0 +1,134 @@ +/* $NetBSD: hexnan.c,v 1.3 2006/03/11 18:38:14 kleink Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 2000 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+ static void
+#ifdef KR_headers
+L_shift(x, x1, i) ULong *x; ULong *x1; int i;
+#else
+L_shift(ULong *x, ULong *x1, int i)
+#endif
+{
+ int j;
+
+ i = 8 - i;
+ i <<= 2;
+ j = ULbits - i;
+ do {
+ *x |= x[1] << j;
+ x[1] >>= i;
+ } while(++x < x1);
+ }
+
+ int
+#ifdef KR_headers
+hexnan(sp, fpi, x0)
+ CONST char **sp; CONST FPI *fpi; ULong *x0;
+#else
+hexnan( CONST char **sp, CONST FPI *fpi, ULong *x0)
+#endif
+{
+ ULong c, h, *x, *x1, *xe;
+ CONST char *s;
+ int havedig, hd0, i, nbits;
+
+ if (!hexdig['0'])
+ hexdig_init_D2A();
+ nbits = fpi->nbits;
+ x = x0 + ((unsigned int)nbits >> kshift);
+ if (nbits & kmask)
+ x++;
+ *--x = 0;
+ x1 = xe = x;
+ havedig = hd0 = i = 0;
+ s = *sp;
+ while((c = *(CONST unsigned char*)++s) != 0) {
+ if ((h = hexdig[c]) == 0) {
+ if (c <= ' ') {
+ if (hd0 < havedig) {
+ if (x < x1 && i < 8)
+ L_shift(x, x1, i);
+ if (x <= x0) {
+ i = 8;
+ continue;
+ }
+ hd0 = havedig;
+ *--x = 0;
+ x1 = x;
+ i = 0;
+ }
+ continue;
+ }
+ if (/*(*/ c == ')' && havedig) {
+ *sp = s + 1;
+ break;
+ }
+ return STRTOG_NaN;
+ }
+ havedig++;
+ if (++i > 8) {
+ if (x <= x0)
+ continue;
+ i = 1;
+ *--x = 0;
+ }
+ *x = (*x << 4) | (h & 0xf);
+ }
+ if (!havedig)
+ return STRTOG_NaN;
+ if (x < x1 && i < 8)
+ L_shift(x, x1, i);
+ if (x > x0) {
+ x1 = x0;
+ do *x1++ = *x++;
+ while(x <= xe);
+ do *x1++ = 0;
+ while(x1 <= xe);
+ }
+ else {
+ /* truncate high-order word if necessary */
+ if ( (i = nbits & (ULbits-1)) !=0)
+ *xe &= ((ULong)0xffffffff) >> (ULbits - i);
+ }
+ for(x1 = xe;; --x1) {
+ if (*x1 != 0)
+ break;
+ if (x1 == x0) {
+ *x1 = 1;
+ break;
+ }
+ }
+ return STRTOG_NaNbits;
+ }
diff --git a/StdLib/LibC/gdtoa/ldtoa.c b/StdLib/LibC/gdtoa/ldtoa.c new file mode 100644 index 0000000000..8e38b624e4 --- /dev/null +++ b/StdLib/LibC/gdtoa/ldtoa.c @@ -0,0 +1,113 @@ +/* $NetBSD: ldtoa.c,v 1.4.2.1 2007/05/07 19:49:06 pavel Exp $ */
+
+/*-
+ * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#include <float.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdlib.h>
+#include <machine/ieee.h>
+#include "gdtoaimp.h"
+
+#if defined(_MSC_VER)
+ /* Disable warnings about conversions to narrower data types,
+ primarily for the fpclassify() macro.
+ */
+ #pragma warning ( disable : 4244 )
+ // Squelch bogus warnings about uninitialized variable use.
+ #pragma warning ( disable : 4700 )
+#endif
+
+/*
+ * ldtoa() is a wrapper for gdtoa() that makes it smell like dtoa(),
+ * except that the floating point argument is passed by reference.
+ * When dtoa() is passed a NaN or infinity, it sets expt to 9999.
+ * However, a long double could have a valid exponent of 9999, so we
+ * use INT_MAX in ldtoa() instead.
+ */
+char *
+ldtoa(long double *ld, int mode, int ndigits, int *decpt, int *sign, char **rve)
+{
+#ifdef EXT_EXPBITS
+ static FPI fpi = {
+ LDBL_MANT_DIG, /* nbits */
+ LDBL_MIN_EXP - LDBL_MANT_DIG, /* emin */
+ LDBL_MAX_EXP - LDBL_MANT_DIG, /* emax */
+ FPI_Round_near, /* rounding */
+#ifdef Sudden_Underflow /* unused, but correct anyway */
+ 1
+#else
+ 0
+#endif
+ };
+ int be, kind;
+ char *ret;
+ union ieee_ext_u u;
+ uint32_t bits[(LDBL_MANT_DIG + 31) / 32];
+
+ u.extu_ld = *ld;
+ *sign = (int)(u.extu_ext.ext_sign);
+ be = (int)(u.extu_ext.ext_exp - (LDBL_MAX_EXP - 1) - (LDBL_MANT_DIG - 1));
+ EXT_TO_ARRAY32(u, bits);
+
+ switch (fpclassify(u.extu_ld)) {
+ case FP_NORMAL:
+ kind = STRTOG_Normal;
+#ifdef LDBL_IMPLICIT_NBIT
+ bits[LDBL_MANT_DIG / 32] |= 1 << ((LDBL_MANT_DIG - 1) % 32);
+#endif /* LDBL_IMPLICIT_NBIT */
+ break;
+ case FP_ZERO:
+ kind = STRTOG_Zero;
+ break;
+ case FP_SUBNORMAL:
+ kind = STRTOG_Denormal;
+#ifdef LDBL_IMPLICIT_NBIT
+ be++;
+#endif
+ break;
+ case FP_INFINITE:
+ kind = STRTOG_Infinite;
+ break;
+ case FP_NAN:
+ kind = STRTOG_NaN;
+ break;
+ default:
+ abort();
+ }
+
+ ret = gdtoa(&fpi, be, (ULong *)bits, &kind, mode, ndigits, decpt, rve);
+ if (*decpt == -32768)
+ *decpt = INT_MAX;
+ return ret;
+#else
+ return dtoa((double)*ld, mode, ndigits, decpt, sign, rve);
+#endif
+}
diff --git a/StdLib/LibC/gdtoa/misc.c b/StdLib/LibC/gdtoa/misc.c new file mode 100644 index 0000000000..902074530f --- /dev/null +++ b/StdLib/LibC/gdtoa/misc.c @@ -0,0 +1,909 @@ +/* $NetBSD: misc.c,v 1.3.12.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 1999 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#if defined(_MSC_VER)
+ // Disable warnings about assignment within conditional expressions.
+ #pragma warning ( disable : 4706 )
+#endif
+
+static Bigint *freelist[Kmax+1];
+#ifndef Omit_Private_Memory
+#ifndef PRIVATE_MEM
+#define PRIVATE_MEM 2304
+#endif
+#define PRIVATE_mem ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
+static double private_mem[PRIVATE_mem], *pmem_next = private_mem;
+#endif
+
+ Bigint *
+Balloc
+#ifdef KR_headers
+ (k) int k;
+#else
+ (int k)
+#endif
+{
+ int x;
+ Bigint *rv;
+#ifndef Omit_Private_Memory
+ unsigned int len;
+#endif
+
+ ACQUIRE_DTOA_LOCK(0);
+ if ( (rv = freelist[k]) !=0) {
+ freelist[k] = rv->next;
+ }
+ else {
+ x = 1 << k;
+#ifdef Omit_Private_Memory
+ rv = (Bigint *)MALLOC(sizeof(Bigint) + (x-1)*sizeof(ULong));
+#else
+ len = (sizeof(Bigint) + (x-1)*sizeof(ULong) + sizeof(double) - 1)
+ /sizeof(double);
+ if (pmem_next - private_mem + len <= PRIVATE_mem) {
+ rv = (Bigint*)(void *)pmem_next;
+ pmem_next += len;
+ }
+ else
+ rv = (Bigint*)MALLOC(len*sizeof(double));
+#endif
+ if (rv == NULL)
+ return NULL;
+ rv->k = k;
+ rv->maxwds = x;
+ }
+ FREE_DTOA_LOCK(0);
+ rv->sign = rv->wds = 0;
+ return rv;
+ }
+
+ void
+Bfree
+#ifdef KR_headers
+ (v) Bigint *v;
+#else
+ (Bigint *v)
+#endif
+{
+ if (v) {
+ ACQUIRE_DTOA_LOCK(0);
+ v->next = freelist[v->k];
+ freelist[v->k] = v;
+ FREE_DTOA_LOCK(0);
+ }
+ }
+
+ int
+lo0bits
+#ifdef KR_headers
+ (y) ULong *y;
+#else
+ (ULong *y)
+#endif
+{
+ int k;
+ ULong x = *y;
+
+ if (x & 7) {
+ if (x & 1)
+ return 0;
+ if (x & 2) {
+ *y = x >> 1;
+ return 1;
+ }
+ *y = x >> 2;
+ return 2;
+ }
+ k = 0;
+ if (!(x & 0xffff)) {
+ k = 16;
+ x >>= 16;
+ }
+ if (!(x & 0xff)) {
+ k += 8;
+ x >>= 8;
+ }
+ if (!(x & 0xf)) {
+ k += 4;
+ x >>= 4;
+ }
+ if (!(x & 0x3)) {
+ k += 2;
+ x >>= 2;
+ }
+ if (!(x & 1)) {
+ k++;
+ x >>= 1;
+ if (!x)
+ return 32;
+ }
+ *y = x;
+ return k;
+ }
+
+ Bigint *
+multadd
+#ifdef KR_headers
+ (b, m, a) Bigint *b; int m, a;
+#else
+ (Bigint *b, int m, int a) /* multiply by m and add a */
+#endif
+{
+ int i, wds;
+#ifdef ULLong
+ ULong *x;
+ ULLong carry, y;
+#else
+ ULong carry, *x, y;
+#ifdef Pack_32
+ ULong xi, z;
+#endif
+#endif
+ Bigint *b1;
+
+ wds = b->wds;
+ x = b->x;
+ i = 0;
+ carry = a;
+ do {
+#ifdef ULLong
+ y = *x * (ULLong)m + carry;
+ carry = y >> 32;
+ /* LINTED conversion */
+ *x++ = (uint32_t)(y & 0xffffffffUL);
+#else
+#ifdef Pack_32
+ xi = *x;
+ y = (xi & 0xffff) * m + carry;
+ z = (xi >> 16) * m + (y >> 16);
+ carry = z >> 16;
+ *x++ = (z << 16) + (y & 0xffff);
+#else
+ y = *x * m + carry;
+ carry = y >> 16;
+ *x++ = y & 0xffff;
+#endif
+#endif
+ }
+ while(++i < wds);
+ if (carry) {
+ if (wds >= b->maxwds) {
+ b1 = Balloc(b->k+1);
+ if (b1 == NULL) {
+ Bfree(b);
+ return NULL;
+ }
+ Bcopy(b1, b);
+ Bfree(b);
+ b = b1;
+ }
+ /* LINTED conversion */
+ b->x[wds++] = (uint32_t)carry;
+ b->wds = wds;
+ }
+ return b;
+ }
+
+ int
+hi0bits_D2A
+#ifdef KR_headers
+ (x) ULong x;
+#else
+ (ULong x)
+#endif
+{
+ int k = 0;
+
+ if (!(x & 0xffff0000)) {
+ k = 16;
+ x <<= 16;
+ }
+ if (!(x & 0xff000000)) {
+ k += 8;
+ x <<= 8;
+ }
+ if (!(x & 0xf0000000)) {
+ k += 4;
+ x <<= 4;
+ }
+ if (!(x & 0xc0000000)) {
+ k += 2;
+ x <<= 2;
+ }
+ if (!(x & 0x80000000)) {
+ k++;
+ if (!(x & 0x40000000))
+ return 32;
+ }
+ return k;
+ }
+
+ Bigint *
+i2b
+#ifdef KR_headers
+ (i) int i;
+#else
+ (int i)
+#endif
+{
+ Bigint *b;
+
+ b = Balloc(1);
+ if (b == NULL)
+ return NULL;
+ b->x[0] = i;
+ b->wds = 1;
+ return b;
+ }
+
+ Bigint *
+mult
+#ifdef KR_headers
+ (a, b) Bigint *a, *b;
+#else
+ (Bigint *a, Bigint *b)
+#endif
+{
+ Bigint *c;
+ int k, wa, wb, wc;
+ ULong *x, *xa, *xae, *xb, *xbe, *xc, *xc0;
+ ULong y;
+#ifdef ULLong
+ ULLong carry, z;
+#else
+ ULong carry, z;
+#ifdef Pack_32
+ ULong z2;
+#endif
+#endif
+
+ if (a->wds < b->wds) {
+ c = a;
+ a = b;
+ b = c;
+ }
+ k = a->k;
+ wa = a->wds;
+ wb = b->wds;
+ wc = wa + wb;
+ if (wc > a->maxwds)
+ k++;
+ c = Balloc(k);
+ if (c == NULL)
+ return NULL;
+ for(x = c->x, xa = x + wc; x < xa; x++)
+ *x = 0;
+ xa = a->x;
+ xae = xa + wa;
+ xb = b->x;
+ xbe = xb + wb;
+ xc0 = c->x;
+#ifdef ULLong
+ for(; xb < xbe; xc0++) {
+ if ( (y = *xb++) !=0) {
+ x = xa;
+ xc = xc0;
+ carry = 0;
+ do {
+ z = *x++ * (ULLong)y + *xc + carry;
+ carry = z >> 32;
+ /* LINTED conversion */
+ *xc++ = (uint32_t)(z & 0xffffffffUL);
+ }
+ while(x < xae);
+ /* LINTED conversion */
+ *xc = (uint32_t)carry;
+ }
+ }
+#else
+#ifdef Pack_32
+ for(; xb < xbe; xb++, xc0++) {
+ if ( (y = *xb & 0xffff) !=0) {
+ x = xa;
+ xc = xc0;
+ carry = 0;
+ do {
+ z = (*x & 0xffff) * y + (*xc & 0xffff) + carry;
+ carry = z >> 16;
+ z2 = (*x++ >> 16) * y + (*xc >> 16) + carry;
+ carry = z2 >> 16;
+ Storeinc(xc, z2, z);
+ }
+ while(x < xae);
+ *xc = carry;
+ }
+ if ( (y = *xb >> 16) !=0) {
+ x = xa;
+ xc = xc0;
+ carry = 0;
+ z2 = *xc;
+ do {
+ z = (*x & 0xffff) * y + (*xc >> 16) + carry;
+ carry = z >> 16;
+ Storeinc(xc, z, z2);
+ z2 = (*x++ >> 16) * y + (*xc & 0xffff) + carry;
+ carry = z2 >> 16;
+ }
+ while(x < xae);
+ *xc = z2;
+ }
+ }
+#else
+ for(; xb < xbe; xc0++) {
+ if ( (y = *xb++) !=0) {
+ x = xa;
+ xc = xc0;
+ carry = 0;
+ do {
+ z = *x++ * y + *xc + carry;
+ carry = z >> 16;
+ *xc++ = z & 0xffff;
+ }
+ while(x < xae);
+ *xc = carry;
+ }
+ }
+#endif
+#endif
+ for(xc0 = c->x, xc = xc0 + wc; wc > 0 && !*--xc; --wc) ;
+ c->wds = wc;
+ return c;
+ }
+
+ static Bigint *p5s;
+
+ Bigint *
+pow5mult
+#ifdef KR_headers
+ (b, k) Bigint *b; int k;
+#else
+ (Bigint *b, int k)
+#endif
+{
+ Bigint *b1, *p5, *p51;
+ int i;
+ static CONST int p05[3] = { 5, 25, 125 };
+
+ if ( (i = k & 3) !=0) {
+ b = multadd(b, p05[i-1], 0);
+ if (b == NULL)
+ return NULL;
+ }
+
+ if ((k = (unsigned int)k >> 2) == 0)
+ return b;
+ if ((p5 = p5s) == 0) {
+ /* first time */
+#ifdef MULTIPLE_THREADS
+ ACQUIRE_DTOA_LOCK(1);
+ if (!(p5 = p5s)) {
+ p5 = p5s = i2b(625);
+ if (p5 == NULL)
+ return NULL;
+ p5->next = 0;
+ }
+ FREE_DTOA_LOCK(1);
+#else
+ p5 = p5s = i2b(625);
+ if (p5 == NULL)
+ return NULL;
+ p5->next = 0;
+#endif
+ }
+ for(;;) {
+ if (k & 1) {
+ b1 = mult(b, p5);
+ if (b1 == NULL)
+ return NULL;
+ b = b1;
+ }
+ if ((k = (unsigned int)k >> 1) == 0)
+ break;
+ if ((p51 = p5->next) == 0) {
+#ifdef MULTIPLE_THREADS
+ ACQUIRE_DTOA_LOCK(1);
+ if (!(p51 = p5->next)) {
+ p51 = p5->next = mult(p5,p5);
+ if (p51 == NULL)
+ return NULL;
+ p51->next = 0;
+ }
+ FREE_DTOA_LOCK(1);
+#else
+ p51 = p5->next = mult(p5,p5);
+ if (p51 == NULL)
+ return NULL;
+ p51->next = 0;
+#endif
+ }
+ p5 = p51;
+ }
+ return b;
+ }
+
+ Bigint *
+lshift
+#ifdef KR_headers
+ (b, k) Bigint *b; int k;
+#else
+ (Bigint *b, int k)
+#endif
+{
+ int i, k1, n, n1;
+ Bigint *b1;
+ ULong *x, *x1, *xe, z;
+
+ n = (unsigned int)k >> kshift;
+ k1 = b->k;
+ n1 = n + b->wds + 1;
+ for(i = b->maxwds; n1 > i; i <<= 1)
+ k1++;
+ b1 = Balloc(k1);
+ if (b1 == NULL)
+ return NULL;
+ x1 = b1->x;
+ for(i = 0; i < n; i++)
+ *x1++ = 0;
+ x = b->x;
+ xe = x + b->wds;
+ if (k &= kmask) {
+#ifdef Pack_32
+ k1 = 32 - k;
+ z = 0;
+ do {
+ *x1++ = *x << k | z;
+ z = *x++ >> k1;
+ }
+ while(x < xe);
+ if ((*x1 = z) !=0)
+ ++n1;
+#else
+ k1 = 16 - k;
+ z = 0;
+ do {
+ *x1++ = *x << k & 0xffff | z;
+ z = *x++ >> k1;
+ }
+ while(x < xe);
+ if (*x1 = z)
+ ++n1;
+#endif
+ }
+ else do
+ *x1++ = *x++;
+ while(x < xe);
+ b1->wds = n1 - 1;
+ Bfree(b);
+ return b1;
+ }
+
+ int
+cmp
+#ifdef KR_headers
+ (a, b) Bigint *a, *b;
+#else
+ (Bigint *a, Bigint *b)
+#endif
+{
+ ULong *xa, *xa0, *xb, *xb0;
+ int i, j;
+
+ i = a->wds;
+ j = b->wds;
+#ifdef DEBUG
+ if (i > 1 && !a->x[i-1])
+ Bug("cmp called with a->x[a->wds-1] == 0");
+ if (j > 1 && !b->x[j-1])
+ Bug("cmp called with b->x[b->wds-1] == 0");
+#endif
+ if (i -= j)
+ return i;
+ xa0 = a->x;
+ xa = xa0 + j;
+ xb0 = b->x;
+ xb = xb0 + j;
+ for(;;) {
+ if (*--xa != *--xb)
+ return *xa < *xb ? -1 : 1;
+ if (xa <= xa0)
+ break;
+ }
+ return 0;
+ }
+
+ Bigint *
+diff
+#ifdef KR_headers
+ (a, b) Bigint *a, *b;
+#else
+ (Bigint *a, Bigint *b)
+#endif
+{
+ Bigint *c;
+ int i, wa, wb;
+ ULong *xa, *xae, *xb, *xbe, *xc;
+#ifdef ULLong
+ ULLong borrow, y;
+#else
+ ULong borrow, y;
+#ifdef Pack_32
+ ULong z;
+#endif
+#endif
+
+ i = cmp(a,b);
+ if (!i) {
+ c = Balloc(0);
+ if (c == NULL)
+ return NULL;
+ c->wds = 1;
+ c->x[0] = 0;
+ return c;
+ }
+ if (i < 0) {
+ c = a;
+ a = b;
+ b = c;
+ i = 1;
+ }
+ else
+ i = 0;
+ c = Balloc(a->k);
+ if (c == NULL)
+ return NULL;
+ c->sign = i;
+ wa = a->wds;
+ xa = a->x;
+ xae = xa + wa;
+ wb = b->wds;
+ xb = b->x;
+ xbe = xb + wb;
+ xc = c->x;
+ borrow = 0;
+#ifdef ULLong
+ do {
+ y = (ULLong)*xa++ - *xb++ - borrow;
+ borrow = y >> 32 & 1UL;
+ /* LINTED conversion */
+ *xc++ = (uint32_t)(y & 0xffffffffUL);
+ }
+ while(xb < xbe);
+ while(xa < xae) {
+ y = *xa++ - borrow;
+ borrow = y >> 32 & 1UL;
+ /* LINTED conversion */
+ *xc++ = (uint32_t)(y & 0xffffffffUL);
+ }
+#else
+#ifdef Pack_32
+ do {
+ y = (*xa & 0xffff) - (*xb & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ z = (*xa++ >> 16) - (*xb++ >> 16) - borrow;
+ borrow = (z & 0x10000) >> 16;
+ Storeinc(xc, z, y);
+ }
+ while(xb < xbe);
+ while(xa < xae) {
+ y = (*xa & 0xffff) - borrow;
+ borrow = (y & 0x10000) >> 16;
+ z = (*xa++ >> 16) - borrow;
+ borrow = (z & 0x10000) >> 16;
+ Storeinc(xc, z, y);
+ }
+#else
+ do {
+ y = *xa++ - *xb++ - borrow;
+ borrow = (y & 0x10000) >> 16;
+ *xc++ = y & 0xffff;
+ }
+ while(xb < xbe);
+ while(xa < xae) {
+ y = *xa++ - borrow;
+ borrow = (y & 0x10000) >> 16;
+ *xc++ = y & 0xffff;
+ }
+#endif
+#endif
+ while(!*--xc)
+ wa--;
+ c->wds = wa;
+ return c;
+ }
+
+ double
+b2d
+#ifdef KR_headers
+ (a, e) Bigint *a; int *e;
+#else
+ (Bigint *a, int *e)
+#endif
+{
+ ULong *xa, *xa0, w, y, z;
+ int k;
+ double d;
+#ifdef VAX
+ ULong d0, d1;
+#else
+#define d0 word0(d)
+#define d1 word1(d)
+#endif
+
+ xa0 = a->x;
+ xa = xa0 + a->wds;
+ y = *--xa;
+#ifdef DEBUG
+ if (!y) Bug("zero y in b2d");
+#endif
+ k = hi0bits(y);
+ *e = 32 - k;
+#ifdef Pack_32
+ if (k < Ebits) {
+ d0 = (UINT32)(Exp_1 | y >> (Ebits - k));
+ w = xa > xa0 ? *--xa : 0;
+ d1 = (UINT32)(y << ((32-Ebits) + k) | w >> (Ebits - k));
+ goto ret_d;
+ }
+ z = xa > xa0 ? *--xa : 0;
+ if (k -= Ebits) {
+ d0 = (UINT32)(Exp_1 | y << k | z >> (32 - k));
+ y = xa > xa0 ? *--xa : 0;
+ d1 = (UINT32)(z << k | y >> (32 - k));
+ }
+ else {
+ d0 = (UINT32)(Exp_1 | y);
+ d1 = (UINT32)z;
+ }
+#else
+ if (k < Ebits + 16) {
+ z = xa > xa0 ? *--xa : 0;
+ d0 = Exp_1 | y << k - Ebits | z >> Ebits + 16 - k;
+ w = xa > xa0 ? *--xa : 0;
+ y = xa > xa0 ? *--xa : 0;
+ d1 = z << k + 16 - Ebits | w << k - Ebits | y >> 16 + Ebits - k;
+ goto ret_d;
+ }
+ z = xa > xa0 ? *--xa : 0;
+ w = xa > xa0 ? *--xa : 0;
+ k -= Ebits + 16;
+ d0 = Exp_1 | y << k + 16 | z << k | w >> 16 - k;
+ y = xa > xa0 ? *--xa : 0;
+ d1 = w << k + 16 | y << k;
+#endif
+ ret_d:
+#ifdef VAX
+ word0(d) = d0 >> 16 | d0 << 16;
+ word1(d) = d1 >> 16 | d1 << 16;
+#endif
+ return dval(d);
+ }
+#undef d0
+#undef d1
+
+ Bigint *
+d2b
+#ifdef KR_headers
+ (d, e, bits) double d; int *e, *bits;
+#else
+ (double d, int *e, int *bits)
+#endif
+{
+ Bigint *b;
+#ifndef Sudden_Underflow
+ int i;
+#endif
+ int de, k;
+ ULong *x, y, z;
+#ifdef VAX
+ ULong d0, d1;
+ d0 = word0(d) >> 16 | word0(d) << 16;
+ d1 = word1(d) >> 16 | word1(d) << 16;
+#else
+#define d0 word0(d)
+#define d1 word1(d)
+#endif
+
+#ifdef Pack_32
+ b = Balloc(1);
+#else
+ b = Balloc(2);
+#endif
+ if (b == NULL)
+ return NULL;
+ x = b->x;
+
+ z = d0 & Frac_mask;
+ d0 &= 0x7fffffff; /* clear sign bit, which we ignore */
+#ifdef Sudden_Underflow
+ de = (int)(d0 >> Exp_shift);
+#ifndef IBM
+ z |= Exp_msk11;
+#endif
+#else
+ if ( (de = (int)(d0 >> Exp_shift)) !=0)
+ z |= Exp_msk1;
+#endif
+#ifdef Pack_32
+ if ( (y = d1) !=0) {
+ if ( (k = lo0bits(&y)) !=0) {
+ x[0] = y | z << (32 - k);
+ z >>= k;
+ }
+ else
+ x[0] = y;
+#ifndef Sudden_Underflow
+ i =
+#endif
+ b->wds = (x[1] = z) !=0 ? 2 : 1;
+ }
+ else {
+#ifdef DEBUG
+ if (!z)
+ Bug("Zero passed to d2b");
+#endif
+ k = lo0bits(&z);
+ x[0] = z;
+#ifndef Sudden_Underflow
+ i =
+#endif
+ b->wds = 1;
+ k += 32;
+ }
+#else
+ if ( (y = d1) !=0) {
+ if ( (k = lo0bits(&y)) !=0)
+ if (k >= 16) {
+ x[0] = y | z << 32 - k & 0xffff;
+ x[1] = z >> k - 16 & 0xffff;
+ x[2] = z >> k;
+ i = 2;
+ }
+ else {
+ x[0] = y & 0xffff;
+ x[1] = y >> 16 | z << 16 - k & 0xffff;
+ x[2] = z >> k & 0xffff;
+ x[3] = z >> k+16;
+ i = 3;
+ }
+ else {
+ x[0] = y & 0xffff;
+ x[1] = y >> 16;
+ x[2] = z & 0xffff;
+ x[3] = z >> 16;
+ i = 3;
+ }
+ }
+ else {
+#ifdef DEBUG
+ if (!z)
+ Bug("Zero passed to d2b");
+#endif
+ k = lo0bits(&z);
+ if (k >= 16) {
+ x[0] = z;
+ i = 0;
+ }
+ else {
+ x[0] = z & 0xffff;
+ x[1] = z >> 16;
+ i = 1;
+ }
+ k += 32;
+ }
+ while(!x[i])
+ --i;
+ b->wds = i + 1;
+#endif
+#ifndef Sudden_Underflow
+ if (de) {
+#endif
+#ifdef IBM
+ *e = (de - Bias - (P-1) << 2) + k;
+ *bits = 4*P + 8 - k - hi0bits(word0(d) & Frac_mask);
+#else
+ *e = de - Bias - (P-1) + k;
+ *bits = P - k;
+#endif
+#ifndef Sudden_Underflow
+ }
+ else {
+ *e = de - Bias - (P-1) + 1 + k;
+#ifdef Pack_32
+ *bits = 32*i - hi0bits(x[i-1]);
+#else
+ *bits = (i+2)*16 - hi0bits(x[i]);
+#endif
+ }
+#endif
+ return b;
+ }
+#undef d0
+#undef d1
+
+ CONST double
+#ifdef IEEE_Arith
+bigtens[] = { 1e16, 1e32, 1e64, 1e128, 1e256 };
+CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128, 1e-256
+ };
+#else
+#ifdef IBM
+bigtens[] = { 1e16, 1e32, 1e64 };
+CONST double tinytens[] = { 1e-16, 1e-32, 1e-64 };
+#else
+bigtens[] = { 1e16, 1e32 };
+CONST double tinytens[] = { 1e-16, 1e-32 };
+#endif
+#endif
+
+ CONST double
+tens[] = {
+ 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+ 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+ 1e20, 1e21, 1e22
+#ifdef VAX
+ , 1e23, 1e24
+#endif
+ };
+
+ char *
+#ifdef KR_headers
+strcp_D2A(a, b) char *a; char *b;
+#else
+strcp_D2A(char *a, CONST char *b)
+#endif
+{
+ while((*a = *b++))
+ a++;
+ return a;
+ }
+
+#ifdef NO_STRING_H
+
+ Char *
+#ifdef KR_headers
+memcpy_D2A(a, b, len) Char *a; Char *b; size_t len;
+#else
+memcpy_D2A(void *a1, void *b1, size_t len)
+#endif
+{
+ char *a = (char*)a1, *ae = a + len;
+ char *b = (char*)b1, *a0 = a;
+ while(a < ae)
+ *a++ = *b++;
+ return a0;
+ }
+
+#endif /* NO_STRING_H */
diff --git a/StdLib/LibC/gdtoa/smisc.c b/StdLib/LibC/gdtoa/smisc.c new file mode 100644 index 0000000000..59e4f97dcc --- /dev/null +++ b/StdLib/LibC/gdtoa/smisc.c @@ -0,0 +1,209 @@ +/* $NetBSD: smisc.c,v 1.2.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 1999 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */
+// Disable: warning C4700: uninitialized local variable 'xx' used
+#pragma warning ( disable : 4700 )
+#endif /* defined(_MSC_VER) */
+
+Bigint *
+s2b
+#ifdef KR_headers
+ (s, nd0, nd, y9) CONST char *s; int nd0, nd; ULong y9;
+#else
+ (CONST char *s, int nd0, int nd, ULong y9)
+#endif
+{
+ Bigint *b;
+ int i, k;
+ Long x, y;
+
+ x = (nd + 8) / 9;
+ for(k = 0, y = 1; x > y; y <<= 1, k++) ;
+#ifdef Pack_32
+ b = Balloc(k);
+ if (b == NULL)
+ return NULL;
+ b->x[0] = y9;
+ b->wds = 1;
+#else
+ b = Balloc(k+1);
+ if (b == NULL)
+ return NULL;
+ b->x[0] = y9 & 0xffff;
+ b->wds = (b->x[1] = y9 >> 16) ? 2 : 1;
+#endif
+
+ i = 9;
+ if (9 < nd0) {
+ s += 9;
+ do {
+ b = multadd(b, 10, *s++ - '0');
+ if (b == NULL)
+ return NULL;
+ } while(++i < nd0);
+ s++;
+ }
+ else
+ s += 10;
+ for(; i < nd; i++) {
+ b = multadd(b, 10, *s++ - '0');
+ if (b == NULL)
+ return NULL;
+ }
+ return b;
+ }
+
+ double
+ratio
+#ifdef KR_headers
+ (a, b) Bigint *a, *b;
+#else
+ (Bigint *a, Bigint *b)
+#endif
+{
+ double da, db;
+ int k, ka, kb;
+
+ dval(da) = b2d(a, &ka);
+ dval(db) = b2d(b, &kb);
+ k = ka - kb + ULbits*(a->wds - b->wds);
+#ifdef IBM
+ if (k > 0) {
+ word0(da) += (k >> 2)*Exp_msk1;
+ if (k &= 3)
+ dval(da) *= 1 << k;
+ }
+ else {
+ k = -k;
+ word0(db) += (k >> 2)*Exp_msk1;
+ if (k &= 3)
+ dval(db) *= 1 << k;
+ }
+#else
+ if (k > 0)
+ word0(da) += k*Exp_msk1;
+ else {
+ k = -k;
+ word0(db) += k*Exp_msk1;
+ }
+#endif
+ return dval(da) / dval(db);
+ }
+
+#ifdef INFNAN_CHECK
+
+ int
+match
+#ifdef KR_headers
+ (sp, t) CONST char **sp, *t;
+#else
+ (CONST char **sp, CONST char *t)
+#endif
+{
+ int c, d;
+ CONST char *s = *sp;
+
+ while( (d = *t++) !=0) {
+ if ((c = *++s) >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ if (c != d)
+ return 0;
+ }
+ *sp = s + 1;
+ return 1;
+ }
+#endif /* INFNAN_CHECK */
+
+ void
+#ifdef KR_headers
+copybits(c, n, b) ULong *c; int n; Bigint *b;
+#else
+copybits(ULong *c, int n, Bigint *b)
+#endif
+{
+ ULong *ce, *x, *xe;
+#ifdef Pack_16
+ int nw, nw1;
+#endif
+
+ ce = c + ((unsigned int)(n-1) >> kshift) + 1;
+ x = b->x;
+#ifdef Pack_32
+ xe = x + b->wds;
+ while(x < xe)
+ *c++ = *x++;
+#else
+ nw = b->wds;
+ nw1 = nw & 1;
+ for(xe = x + (nw - nw1); x < xe; x += 2)
+ Storeinc(c, x[1], x[0]);
+ if (nw1)
+ *c++ = *x;
+#endif
+ while(c < ce)
+ *c++ = 0;
+ }
+
+ ULong
+#ifdef KR_headers
+any_on(b, k) Bigint *b; int k;
+#else
+any_on(Bigint *b, int k)
+#endif
+{
+ int n, nwds;
+ ULong *x, *x0, x1, x2;
+
+ x = b->x;
+ nwds = b->wds;
+ n = (unsigned int)k >> kshift;
+ if (n > nwds)
+ n = nwds;
+ else if (n < nwds && (k &= kmask)) {
+ x1 = x2 = x[n];
+ x1 >>= k;
+ x1 <<= k;
+ if (x1 != x2)
+ return 1;
+ }
+ x0 = x;
+ x += n;
+ while(x > x0)
+ if (*--x)
+ return 1;
+ return 0;
+ }
diff --git a/StdLib/LibC/gdtoa/strtod.c b/StdLib/LibC/gdtoa/strtod.c new file mode 100644 index 0000000000..989663a01e --- /dev/null +++ b/StdLib/LibC/gdtoa/strtod.c @@ -0,0 +1,1022 @@ +/* $NetBSD: strtod.c,v 1.4.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998-2001 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+#ifndef NO_FENV_H
+#include <fenv.h>
+#endif
+
+#ifdef USE_LOCALE
+#include "locale.h"
+#endif
+
+#ifdef IEEE_Arith
+#ifndef NO_IEEE_Scale
+#define Avoid_Underflow
+#undef tinytens
+/* The factor of 2^53 in tinytens[4] helps us avoid setting the underflow */
+/* flag unnecessarily. It leads to a song and dance at the end of strtod. */
+static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128,
+ 9007199254740992.e-256
+ };
+#endif
+#endif
+
+#ifdef Honor_FLT_ROUNDS
+#define Rounding rounding
+#undef Check_FLT_ROUNDS
+#define Check_FLT_ROUNDS
+#else
+#define Rounding Flt_Rounds
+#endif
+
+//#ifndef __HAVE_LONG_DOUBLE
+//__strong_alias(_strtold, strtod)
+//__weak_alias(strtold, _strtold)
+//#endif
+
+#if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */
+// Disable: warning C4700: uninitialized local variable 'xx' used
+#pragma warning ( disable : 4700 )
+#endif /* defined(_MSC_VER) */
+
+double
+strtod(CONST char *s00, char **se)
+{
+#ifdef Avoid_Underflow
+ int scale;
+ #endif
+ int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, decpt, dsign,
+ e, e1, esign, i, j, k, nd, nd0, nf, nz, nz0, sign;
+ CONST char *s, *s0, *s1;
+ double aadj, aadj1, adj, rv, rv0;
+ Long L;
+ ULong y, z;
+ Bigint *bb = NULL, *bb1, *bd0;
+ Bigint *bd = NULL, *bs = NULL, *delta = NULL; /* pacify gcc */
+#ifdef SET_INEXACT
+ int inexact, oldinexact;
+#endif
+#ifdef Honor_FLT_ROUNDS
+ int rounding;
+#endif
+
+ sign = nz0 = nz = decpt = 0;
+ dval(rv) = 0.;
+ for(s = s00;;s++) {
+ switch(*s) {
+ case '-':
+ sign = 1;
+ /* FALLTHROUGH */
+ case '+':
+ if (*++s)
+ goto break2;
+ /* FALLTHROUGH */
+ case 0:
+ goto ret0;
+ case '\t':
+ case '\n':
+ case '\v':
+ case '\f':
+ case '\r':
+ case ' ':
+ continue;
+ default:
+ goto break2;
+ }
+ }
+ break2:
+ if (*s == '0') {
+#ifndef NO_HEX_FP
+ {
+ static FPI fpi = { 53, 1-1023-53+1, 2046-1023-53+1, 1, SI };
+ Long expt;
+ ULong bits[2];
+ switch(s[1]) {
+ case 'x':
+ case 'X':
+ {
+#if defined(FE_DOWNWARD) && defined(FE_TONEAREST) && defined(FE_TOWARDZERO) && defined(FE_UPWARD)
+ FPI fpi1 = fpi;
+ switch(fegetround()) {
+ case FE_TOWARDZERO: fpi1.rounding = 0; break;
+ case FE_UPWARD: fpi1.rounding = 2; break;
+ case FE_DOWNWARD: fpi1.rounding = 3;
+ }
+#else
+#endif
+ switch((i = gethex(&s, &fpi, &expt, &bb, sign)) & STRTOG_Retmask) {
+ case STRTOG_NoNumber:
+ s = s00;
+ sign = 0;
+ /* FALLTHROUGH */
+ case STRTOG_Zero:
+ break;
+ default:
+ if (bb) {
+ copybits(bits, fpi.nbits, bb);
+ Bfree(bb);
+ }
+ ULtod((/* LINTED */(U*)&rv)->L, bits, expt, i);
+ }}
+ goto ret;
+ }
+ }
+#endif
+ nz0 = 1;
+ while(*++s == '0') ;
+ if (!*s)
+ goto ret;
+ }
+ s0 = s;
+ y = z = 0;
+ for(nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
+ if (nd < 9)
+ y = 10*y + c - '0';
+ else if (nd < 16)
+ z = 10*z + c - '0';
+ nd0 = nd;
+#ifdef USE_LOCALE
+ if (c == *localeconv()->decimal_point)
+#else
+ if (c == '.')
+#endif
+ {
+ decpt = 1;
+ c = *++s;
+ if (!nd) {
+ for(; c == '0'; c = *++s)
+ nz++;
+ if (c > '0' && c <= '9') {
+ s0 = s;
+ nf += nz;
+ nz = 0;
+ goto have_dig;
+ }
+ goto dig_done;
+ }
+ for(; c >= '0' && c <= '9'; c = *++s) {
+ have_dig:
+ nz++;
+ if (c -= '0') {
+ nf += nz;
+ for(i = 1; i < nz; i++)
+ if (nd++ < 9)
+ y *= 10;
+ else if (nd <= DBL_DIG + 1)
+ z *= 10;
+ if (nd++ < 9)
+ y = 10*y + c;
+ else if (nd <= DBL_DIG + 1)
+ z = 10*z + c;
+ nz = 0;
+ }
+ }
+ }
+ dig_done:
+ e = 0;
+ if (c == 'e' || c == 'E') {
+ if (!nd && !nz && !nz0) {
+ goto ret0;
+ }
+ s00 = s;
+ esign = 0;
+ switch(c = *++s) {
+ case '-':
+ esign = 1;
+ /* FALLTHROUGH */
+ case '+':
+ c = *++s;
+ }
+ if (c >= '0' && c <= '9') {
+ while(c == '0')
+ c = *++s;
+ if (c > '0' && c <= '9') {
+ L = c - '0';
+ s1 = s;
+ while((c = *++s) >= '0' && c <= '9')
+ L = 10*L + c - '0';
+ if (s - s1 > 8 || L > 19999)
+ /* Avoid confusion from exponents
+ * so large that e might overflow.
+ */
+ e = 19999; /* safe for 16 bit ints */
+ else
+ e = (int)L;
+ if (esign)
+ e = -e;
+ }
+ else
+ e = 0;
+ }
+ else
+ s = s00;
+ }
+ if (!nd) {
+ if (!nz && !nz0) {
+#ifdef INFNAN_CHECK
+ /* Check for Nan and Infinity */
+#ifndef No_Hex_NaN
+ ULong bits[2];
+ static FPI fpinan = /* only 52 explicit bits */
+ { 52, 1-1023-53+1, 2046-1023-53+1, 1, SI };
+#endif // No_Hex_NaN
+ if (!decpt)
+ switch(c) {
+ case 'i':
+ case 'I':
+ if (match(&s,"nf")) {
+ --s;
+ if (!match(&s,"inity"))
+ ++s;
+ word0(rv) = 0x7ff00000;
+ word1(rv) = 0;
+ goto ret;
+ }
+ break;
+ case 'n':
+ case 'N':
+ if (match(&s, "an")) {
+#ifndef No_Hex_NaN
+ if (*s == '(' /*)*/
+ && hexnan(&s, &fpinan, bits)
+ == STRTOG_NaNbits) {
+ word0(rv) = (UINT32)(0x7ff00000U | bits[1]);
+ word1(rv) = (UINT32)bits[0];
+ }
+ else {
+#endif
+ word0(rv) = NAN_WORD0;
+ word1(rv) = NAN_WORD1;
+#ifndef No_Hex_NaN
+ }
+#endif
+ goto ret;
+ }
+ }
+#endif /* INFNAN_CHECK */
+ ret0:
+ s = s00;
+ sign = 0;
+ }
+ goto ret;
+ }
+ e1 = e -= nf;
+
+ /* Now we have nd0 digits, starting at s0, followed by a
+ * decimal point, followed by nd-nd0 digits. The number we're
+ * after is the integer represented by those digits times
+ * 10**e */
+
+ if (!nd0)
+ nd0 = nd;
+ k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
+ dval(rv) = (double)y;
+ if (k > 9) {
+#ifdef SET_INEXACT
+ if (k > DBL_DIG)
+ oldinexact = get_inexact();
+#endif
+ dval(rv) = tens[k - 9] * dval(rv) + z;
+ }
+ bd0 = 0;
+ if (nd <= DBL_DIG
+#ifndef RND_PRODQUOT
+#ifndef Honor_FLT_ROUNDS
+ && Flt_Rounds == 1
+#endif
+#endif
+ ) {
+ if (!e)
+ goto ret;
+ if (e > 0) {
+ if (e <= Ten_pmax) {
+#ifdef VAX
+ goto vax_ovfl_check;
+#else
+#ifdef Honor_FLT_ROUNDS
+ /* round correctly FLT_ROUNDS = 2 or 3 */
+ if (sign) {
+ rv = -rv;
+ sign = 0;
+ }
+#endif
+ /* rv = */ rounded_product(dval(rv), tens[e]);
+ goto ret;
+#endif
+ }
+ i = DBL_DIG - nd;
+ if (e <= Ten_pmax + i) {
+ /* A fancier test would sometimes let us do
+ * this for larger i values.
+ */
+#ifdef Honor_FLT_ROUNDS
+ /* round correctly FLT_ROUNDS = 2 or 3 */
+ if (sign) {
+ rv = -rv;
+ sign = 0;
+ }
+#endif
+ e -= i;
+ dval(rv) *= tens[i];
+#ifdef VAX
+ /* VAX exponent range is so narrow we must
+ * worry about overflow here...
+ */
+ vax_ovfl_check:
+ word0(rv) -= P*Exp_msk1;
+ /* rv = */ rounded_product(dval(rv), tens[e]);
+ if ((word0(rv) & Exp_mask)
+ > Exp_msk1*(DBL_MAX_EXP+Bias-1-P))
+ goto ovfl;
+ word0(rv) += P*Exp_msk1;
+#else
+ /* rv = */ rounded_product(dval(rv), tens[e]);
+#endif
+ goto ret;
+ }
+ }
+#ifndef Inaccurate_Divide
+ else if (e >= -Ten_pmax) {
+#ifdef Honor_FLT_ROUNDS
+ /* round correctly FLT_ROUNDS = 2 or 3 */
+ if (sign) {
+ rv = -rv;
+ sign = 0;
+ }
+#endif
+ /* rv = */ rounded_quotient(dval(rv), tens[-e]);
+ goto ret;
+ }
+#endif
+ }
+ e1 += nd - k;
+
+#ifdef IEEE_Arith
+#ifdef SET_INEXACT
+ inexact = 1;
+ if (k <= DBL_DIG)
+ oldinexact = get_inexact();
+#endif
+#ifdef Avoid_Underflow
+ scale = 0;
+#endif
+#ifdef Honor_FLT_ROUNDS
+ if ((rounding = Flt_Rounds) >= 2) {
+ if (sign)
+ rounding = rounding == 2 ? 0 : 2;
+ else
+ if (rounding != 2)
+ rounding = 0;
+ }
+#endif
+#endif /*IEEE_Arith*/
+
+ /* Get starting approximation = rv * 10**e1 */
+
+ if (e1 > 0) {
+ if ( (i = e1 & 15) !=0)
+ dval(rv) *= tens[i];
+ if (e1 &= ~15) {
+ if (e1 > DBL_MAX_10_EXP) {
+ ovfl:
+#ifndef NO_ERRNO
+ errno = ERANGE;
+#endif
+ /* Can't trust HUGE_VAL */
+#ifdef IEEE_Arith
+#ifdef Honor_FLT_ROUNDS
+ switch(rounding) {
+ case 0: /* toward 0 */
+ case 3: /* toward -infinity */
+ word0(rv) = Big0;
+ word1(rv) = Big1;
+ break;
+ default:
+ word0(rv) = Exp_mask;
+ word1(rv) = 0;
+ }
+#else /*Honor_FLT_ROUNDS*/
+ word0(rv) = Exp_mask;
+ word1(rv) = 0;
+#endif /*Honor_FLT_ROUNDS*/
+#ifdef SET_INEXACT
+ /* set overflow bit */
+ dval(rv0) = 1e300;
+ dval(rv0) *= dval(rv0);
+#endif
+#else /*IEEE_Arith*/
+ word0(rv) = Big0;
+ word1(rv) = Big1;
+#endif /*IEEE_Arith*/
+ if (bd0)
+ goto retfree;
+ goto ret;
+ }
+ e1 = (unsigned int)e1 >> 4;
+ for(j = 0; e1 > 1; j++, e1 = (unsigned int)e1 >> 1)
+ if (e1 & 1)
+ dval(rv) *= bigtens[j];
+ /* The last multiplication could overflow. */
+ word0(rv) -= P*Exp_msk1;
+ dval(rv) *= bigtens[j];
+ if ((z = word0(rv) & Exp_mask)
+ > Exp_msk1*(DBL_MAX_EXP+Bias-P))
+ goto ovfl;
+ if (z > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
+ /* set to largest number */
+ /* (Can't trust DBL_MAX) */
+ word0(rv) = Big0;
+ word1(rv) = Big1;
+ }
+ else
+ word0(rv) += P*Exp_msk1;
+ }
+ }
+ else if (e1 < 0) {
+ e1 = -e1;
+ if ( (i = e1 & 15) !=0)
+ dval(rv) /= tens[i];
+ if (e1 >>= 4) {
+ if (e1 >= 1 << n_bigtens)
+ goto undfl;
+#ifdef Avoid_Underflow
+ if (e1 & Scale_Bit)
+ scale = 2*P;
+ for(j = 0; e1 > 0; j++, e1 = (unsigned int)e1 >> 1)
+ if (e1 & 1)
+ dval(rv) *= tinytens[j];
+ if (scale && (j = 2*P + 1 - ((word0(rv) & Exp_mask)
+ >> Exp_shift)) > 0) {
+ /* scaled rv is denormal; zap j low bits */
+ if (j >= 32) {
+ word1(rv) = 0;
+ if (j >= 53)
+ word0(rv) = (P+2)*Exp_msk1;
+ else
+ word0(rv) &= 0xffffffff << (j-32);
+ }
+ else
+ word1(rv) &= 0xffffffff << j;
+ }
+#else
+ for(j = 0; e1 > 1; j++, e1 >>= 1)
+ if (e1 & 1)
+ dval(rv) *= tinytens[j];
+ /* The last multiplication could underflow. */
+ dval(rv0) = dval(rv);
+ dval(rv) *= tinytens[j];
+ if (!dval(rv)) {
+ dval(rv) = 2.*dval(rv0);
+ dval(rv) *= tinytens[j];
+#endif
+ if (!dval(rv)) {
+ undfl:
+ dval(rv) = 0.;
+#ifndef NO_ERRNO
+ errno = ERANGE;
+#endif
+ if (bd0)
+ goto retfree;
+ goto ret;
+ }
+#ifndef Avoid_Underflow
+ word0(rv) = Tiny0;
+ word1(rv) = Tiny1;
+ /* The refinement below will clean
+ * this approximation up.
+ */
+ }
+#endif
+ }
+ }
+
+ /* Now the hard part -- adjusting rv to the correct value.*/
+
+ /* Put digits into bd: true value = bd * 10^e */
+
+ bd0 = s2b(s0, nd0, nd, y);
+ if (bd0 == NULL)
+ goto ovfl;
+
+ for(;;) {
+ bd = Balloc(bd0->k);
+ if (bd == NULL)
+ goto ovfl;
+ Bcopy(bd, bd0);
+ bb = d2b(dval(rv), &bbe, &bbbits); /* rv = bb * 2^bbe */
+ if (bb == NULL)
+ goto ovfl;
+ bs = i2b(1);
+ if (bs == NULL)
+ goto ovfl;
+
+ if (e >= 0) {
+ bb2 = bb5 = 0;
+ bd2 = bd5 = e;
+ }
+ else {
+ bb2 = bb5 = -e;
+ bd2 = bd5 = 0;
+ }
+ if (bbe >= 0)
+ bb2 += bbe;
+ else
+ bd2 -= bbe;
+ bs2 = bb2;
+#ifdef Honor_FLT_ROUNDS
+ if (rounding != 1)
+ bs2++;
+#endif
+#ifdef Avoid_Underflow
+ j = bbe - scale;
+ i = j + bbbits - 1; /* logb(rv) */
+ if (i < Emin) /* denormal */
+ j += P - Emin;
+ else
+ j = P + 1 - bbbits;
+#else /*Avoid_Underflow*/
+#ifdef Sudden_Underflow
+#ifdef IBM
+ j = 1 + 4*P - 3 - bbbits + ((bbe + bbbits - 1) & 3);
+#else
+ j = P + 1 - bbbits;
+#endif
+#else /*Sudden_Underflow*/
+ j = bbe;
+ i = j + bbbits - 1; /* logb(rv) */
+ if (i < Emin) /* denormal */
+ j += P - Emin;
+ else
+ j = P + 1 - bbbits;
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+ bb2 += j;
+ bd2 += j;
+#ifdef Avoid_Underflow
+ bd2 += scale;
+#endif
+ i = bb2 < bd2 ? bb2 : bd2;
+ if (i > bs2)
+ i = bs2;
+ if (i > 0) {
+ bb2 -= i;
+ bd2 -= i;
+ bs2 -= i;
+ }
+ if (bb5 > 0) {
+ bs = pow5mult(bs, bb5);
+ if (bs == NULL)
+ goto ovfl;
+ bb1 = mult(bs, bb);
+ if (bb1 == NULL)
+ goto ovfl;
+ Bfree(bb);
+ bb = bb1;
+ }
+ if (bb2 > 0) {
+ bb = lshift(bb, bb2);
+ if (bb == NULL)
+ goto ovfl;
+ }
+ if (bd5 > 0) {
+ bd = pow5mult(bd, bd5);
+ if (bd == NULL)
+ goto ovfl;
+ }
+ if (bd2 > 0) {
+ bd = lshift(bd, bd2);
+ if (bd == NULL)
+ goto ovfl;
+ }
+ if (bs2 > 0) {
+ bs = lshift(bs, bs2);
+ if (bs == NULL)
+ goto ovfl;
+ }
+ delta = diff(bb, bd);
+ if (delta == NULL)
+ goto ovfl;
+ dsign = delta->sign;
+ delta->sign = 0;
+ i = cmp(delta, bs);
+#ifdef Honor_FLT_ROUNDS
+ if (rounding != 1) {
+ if (i < 0) {
+ /* Error is less than an ulp */
+ if (!delta->x[0] && delta->wds <= 1) {
+ /* exact */
+#ifdef SET_INEXACT
+ inexact = 0;
+#endif
+ break;
+ }
+ if (rounding) {
+ if (dsign) {
+ adj = 1.;
+ goto apply_adj;
+ }
+ }
+ else if (!dsign) {
+ adj = -1.;
+ if (!word1(rv)
+ && !(word0(rv) & Frac_mask)) {
+ y = word0(rv) & Exp_mask;
+#ifdef Avoid_Underflow
+ if (!scale || y > 2*P*Exp_msk1)
+#else
+ if (y)
+#endif
+ {
+ delta = lshift(delta,Log2P);
+ if (cmp(delta, bs) <= 0)
+ adj = -0.5;
+ }
+ }
+ apply_adj:
+#ifdef Avoid_Underflow
+ if (scale && (y = word0(rv) & Exp_mask)
+ <= 2*P*Exp_msk1)
+ word0(adj) += (2*P+1)*Exp_msk1 - y;
+#else
+#ifdef Sudden_Underflow
+ if ((word0(rv) & Exp_mask) <=
+ P*Exp_msk1) {
+ word0(rv) += P*Exp_msk1;
+ dval(rv) += adj*ulp(dval(rv));
+ word0(rv) -= P*Exp_msk1;
+ }
+ else
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+ dval(rv) += adj*ulp(dval(rv));
+ }
+ break;
+ }
+ adj = ratio(delta, bs);
+ if (adj < 1.)
+ adj = 1.;
+ if (adj <= 0x7ffffffe) {
+ /* adj = rounding ? ceil(adj) : floor(adj); */
+ y = adj;
+ if (y != adj) {
+ if (!((rounding>>1) ^ dsign))
+ y++;
+ adj = y;
+ }
+ }
+#ifdef Avoid_Underflow
+ if (scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1)
+ word0(adj) += (2*P+1)*Exp_msk1 - y;
+#else
+#ifdef Sudden_Underflow
+ if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
+ word0(rv) += P*Exp_msk1;
+ adj *= ulp(dval(rv));
+ if (dsign)
+ dval(rv) += adj;
+ else
+ dval(rv) -= adj;
+ word0(rv) -= P*Exp_msk1;
+ goto cont;
+ }
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+ adj *= ulp(dval(rv));
+ if (dsign)
+ dval(rv) += adj;
+ else
+ dval(rv) -= adj;
+ goto cont;
+ }
+#endif /*Honor_FLT_ROUNDS*/
+
+ if (i < 0) {
+ /* Error is less than half an ulp -- check for
+ * special case of mantissa a power of two.
+ */
+ if (dsign || word1(rv) || word0(rv) & Bndry_mask
+#ifdef IEEE_Arith
+#ifdef Avoid_Underflow
+ || (word0(rv) & Exp_mask) <= (2*P+1)*Exp_msk1
+#else
+ || (word0(rv) & Exp_mask) <= Exp_msk1
+#endif
+#endif
+ ) {
+#ifdef SET_INEXACT
+ if (!delta->x[0] && delta->wds <= 1)
+ inexact = 0;
+#endif
+ break;
+ }
+ if (!delta->x[0] && delta->wds <= 1) {
+ /* exact result */
+#ifdef SET_INEXACT
+ inexact = 0;
+#endif
+ break;
+ }
+ delta = lshift(delta,Log2P);
+ if (cmp(delta, bs) > 0)
+ goto drop_down;
+ break;
+ }
+ if (i == 0) {
+ /* exactly half-way between */
+ if (dsign) {
+ if ((word0(rv) & Bndry_mask1) == Bndry_mask1
+ && word1(rv) == (
+#ifdef Avoid_Underflow
+ (scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1)
+ ? (0xffffffff & (0xffffffff << (2*P+1-(y>>Exp_shift)))) :
+#endif
+ 0xffffffff)) {
+ /*boundary case -- increment exponent*/
+ word0(rv) = (word0(rv) & Exp_mask)
+ + Exp_msk1
+#ifdef IBM
+ | Exp_msk1 >> 4
+#endif
+ ;
+ word1(rv) = 0;
+#ifdef Avoid_Underflow
+ dsign = 0;
+#endif
+ break;
+ }
+ }
+ else if (!(word0(rv) & Bndry_mask) && !word1(rv)) {
+ drop_down:
+ /* boundary case -- decrement exponent */
+#ifdef Sudden_Underflow /*{{*/
+ L = word0(rv) & Exp_mask;
+#ifdef IBM
+ if (L < Exp_msk1)
+#else
+#ifdef Avoid_Underflow
+ if (L <= (scale ? (2*P+1)*Exp_msk1 : Exp_msk1))
+#else
+ if (L <= Exp_msk1)
+#endif /*Avoid_Underflow*/
+#endif /*IBM*/
+ goto undfl;
+ L -= Exp_msk1;
+#else /*Sudden_Underflow}{*/
+#ifdef Avoid_Underflow
+ if (scale) {
+ L = word0(rv) & Exp_mask;
+ if (L <= (2*P+1)*Exp_msk1) {
+ if (L > (P+2)*Exp_msk1)
+ /* round even ==> */
+ /* accept rv */
+ break;
+ /* rv = smallest denormal */
+ goto undfl;
+ }
+ }
+#endif /*Avoid_Underflow*/
+ L = (word0(rv) & Exp_mask) - Exp_msk1;
+#endif /*Sudden_Underflow}*/
+ word0(rv) = (UINT32)(L | Bndry_mask1);
+ word1(rv) = 0xffffffffU;
+#ifdef IBM
+ goto cont;
+#else
+ break;
+#endif
+ }
+#ifndef ROUND_BIASED
+ if (!(word1(rv) & LSB))
+ break;
+#endif
+ if (dsign)
+ dval(rv) += ulp(dval(rv));
+#ifndef ROUND_BIASED
+ else {
+ dval(rv) -= ulp(dval(rv));
+#ifndef Sudden_Underflow
+ if (!dval(rv))
+ goto undfl;
+#endif
+ }
+#ifdef Avoid_Underflow
+ dsign = 1 - dsign;
+#endif
+#endif
+ break;
+ }
+ if ((aadj = ratio(delta, bs)) <= 2.) {
+ if (dsign)
+ aadj = aadj1 = 1.;
+ else if (word1(rv) || word0(rv) & Bndry_mask) {
+#ifndef Sudden_Underflow
+ if (word1(rv) == Tiny1 && !word0(rv))
+ goto undfl;
+#endif
+ aadj = 1.;
+ aadj1 = -1.;
+ }
+ else {
+ /* special case -- power of FLT_RADIX to be */
+ /* rounded down... */
+
+ if (aadj < 2./FLT_RADIX)
+ aadj = 1./FLT_RADIX;
+ else
+ aadj *= 0.5;
+ aadj1 = -aadj;
+ }
+ }
+ else {
+ aadj *= 0.5;
+ aadj1 = dsign ? aadj : -aadj;
+#ifdef Check_FLT_ROUNDS
+ switch(Rounding) {
+ case 2: /* towards +infinity */
+ aadj1 -= 0.5;
+ break;
+ case 0: /* towards 0 */
+ case 3: /* towards -infinity */
+ aadj1 += 0.5;
+ }
+#else
+ if (Flt_Rounds == 0)
+ aadj1 += 0.5;
+#endif /*Check_FLT_ROUNDS*/
+ }
+ y = word0(rv) & Exp_mask;
+
+ /* Check for overflow */
+
+ if (y == Exp_msk1*(DBL_MAX_EXP+Bias-1)) {
+ dval(rv0) = dval(rv);
+ word0(rv) -= P*Exp_msk1;
+ adj = aadj1 * ulp(dval(rv));
+ dval(rv) += adj;
+ if ((word0(rv) & Exp_mask) >=
+ Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
+ if (word0(rv0) == Big0 && word1(rv0) == Big1)
+ goto ovfl;
+ word0(rv) = Big0;
+ word1(rv) = Big1;
+ goto cont;
+ }
+ else
+ word0(rv) += P*Exp_msk1;
+ }
+ else {
+#ifdef Avoid_Underflow
+ if (scale && y <= 2*P*Exp_msk1) {
+ if (aadj <= 0x7fffffff) {
+ if ((z = (uint32_t)aadj) == 0)
+ z = 1;
+ aadj = (double)z;
+ aadj1 = dsign ? aadj : -aadj;
+ }
+ word0(aadj1) += (UINT32)((2*P+1)*Exp_msk1 - y);
+ }
+ adj = aadj1 * ulp(dval(rv));
+ dval(rv) += adj;
+#else
+#ifdef Sudden_Underflow
+ if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
+ dval(rv0) = dval(rv);
+ word0(rv) += P*Exp_msk1;
+ adj = aadj1 * ulp(dval(rv));
+ dval(rv) += adj;
+#ifdef IBM
+ if ((word0(rv) & Exp_mask) < P*Exp_msk1)
+#else
+ if ((word0(rv) & Exp_mask) <= P*Exp_msk1)
+#endif
+ {
+ if (word0(rv0) == Tiny0
+ && word1(rv0) == Tiny1)
+ goto undfl;
+ word0(rv) = Tiny0;
+ word1(rv) = Tiny1;
+ goto cont;
+ }
+ else
+ word0(rv) -= P*Exp_msk1;
+ }
+ else {
+ adj = aadj1 * ulp(dval(rv));
+ dval(rv) += adj;
+ }
+#else /*Sudden_Underflow*/
+ /* Compute adj so that the IEEE rounding rules will
+ * correctly round rv + adj in some half-way cases.
+ * If rv * ulp(rv) is denormalized (i.e.,
+ * y <= (P-1)*Exp_msk1), we must adjust aadj to avoid
+ * trouble from bits lost to denormalization;
+ * example: 1.2e-307 .
+ */
+ if (y <= (P-1)*Exp_msk1 && aadj > 1.) {
+ aadj1 = (double)(int)(aadj + 0.5);
+ if (!dsign)
+ aadj1 = -aadj1;
+ }
+ adj = aadj1 * ulp(dval(rv));
+ dval(rv) += adj;
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+ }
+ z = word0(rv) & Exp_mask;
+#ifndef SET_INEXACT
+#ifdef Avoid_Underflow
+ if (!scale)
+#endif
+ if (y == z) {
+ /* Can we stop now? */
+ L = (Long)aadj;
+ aadj -= L;
+ /* The tolerances below are conservative. */
+ if (dsign || word1(rv) || word0(rv) & Bndry_mask) {
+ if (aadj < .4999999 || aadj > .5000001)
+ break;
+ }
+ else if (aadj < .4999999/FLT_RADIX)
+ break;
+ }
+#endif
+ cont:
+ Bfree(bb);
+ Bfree(bd);
+ Bfree(bs);
+ Bfree(delta);
+ }
+#ifdef SET_INEXACT
+ if (inexact) {
+ if (!oldinexact) {
+ word0(rv0) = Exp_1 + (70 << Exp_shift);
+ word1(rv0) = 0;
+ dval(rv0) += 1.;
+ }
+ }
+ else if (!oldinexact)
+ clear_inexact();
+#endif
+#ifdef Avoid_Underflow
+ if (scale) {
+ word0(rv0) = Exp_1 - 2*P*Exp_msk1;
+ word1(rv0) = 0;
+ dval(rv) *= dval(rv0);
+#ifndef NO_ERRNO
+ /* try to avoid the bug of testing an 8087 register value */
+ if (word0(rv) == 0 && word1(rv) == 0)
+ errno = ERANGE;
+#endif
+ }
+#endif /* Avoid_Underflow */
+#ifdef SET_INEXACT
+ if (inexact && !(word0(rv) & Exp_mask)) {
+ /* set underflow bit */
+ dval(rv0) = 1e-300;
+ dval(rv0) *= dval(rv0);
+ }
+#endif
+ retfree:
+ Bfree(bb);
+ Bfree(bd);
+ Bfree(bs);
+ Bfree(bd0);
+ Bfree(delta);
+ ret:
+ if (se)
+ *se = __UNCONST(s);
+ return sign ? -dval(rv) : dval(rv);
+}
+
diff --git a/StdLib/LibC/gdtoa/strtodg.c b/StdLib/LibC/gdtoa/strtodg.c new file mode 100644 index 0000000000..fc0ae7cf38 --- /dev/null +++ b/StdLib/LibC/gdtoa/strtodg.c @@ -0,0 +1,1075 @@ +/* $NetBSD: strtodg.c,v 1.5.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998-2001 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#ifdef USE_LOCALE
+#include "locale.h"
+#endif
+
+#if defined(_MSC_VER)
+ // Disable warnings about assignment within conditional expressions.
+ #pragma warning ( disable : 4706 )
+#endif
+
+ static CONST int
+fivesbits[] = { 0, 3, 5, 7, 10, 12, 14, 17, 19, 21,
+ 24, 26, 28, 31, 33, 35, 38, 40, 42, 45,
+ 47, 49, 52
+#ifdef VAX
+ , 54, 56
+#endif
+ };
+
+ Bigint *
+#ifdef KR_headers
+increment(b) Bigint *b;
+#else
+increment(Bigint *b)
+#endif
+{
+ ULong *x, *xe;
+ Bigint *b1;
+#ifdef Pack_16
+ ULong carry = 1, y;
+#endif
+
+ x = b->x;
+ xe = x + b->wds;
+#ifdef Pack_32
+ do {
+ if (*x < (ULong)0xffffffffL) {
+ ++*x;
+ return b;
+ }
+ *x++ = 0;
+ } while(x < xe);
+#else
+ do {
+ y = *x + carry;
+ carry = y >> 16;
+ *x++ = y & 0xffff;
+ if (!carry)
+ return b;
+ } while(x < xe);
+ if (carry)
+#endif
+ {
+ if (b->wds >= b->maxwds) {
+ b1 = Balloc(b->k+1);
+ if (b1 == NULL)
+ return NULL;
+ Bcopy(b1,b);
+ Bfree(b);
+ b = b1;
+ }
+ b->x[b->wds++] = 1;
+ }
+ return b;
+ }
+
+ int
+#ifdef KR_headers
+decrement(b) Bigint *b;
+#else
+decrement(Bigint *b)
+#endif
+{
+ ULong *x, *xe;
+#ifdef Pack_16
+ ULong borrow = 1, y;
+#endif
+
+ x = b->x;
+ xe = x + b->wds;
+#ifdef Pack_32
+ do {
+ if (*x) {
+ --*x;
+ break;
+ }
+ *x++ = 0xffffffffUL;
+ }
+ while(x < xe);
+#else
+ do {
+ y = *x - borrow;
+ borrow = (y & 0x10000) >> 16;
+ *x++ = y & 0xffff;
+ } while(borrow && x < xe);
+#endif
+ return STRTOG_Inexlo;
+ }
+
+ static int
+#ifdef KR_headers
+all_on(b, n) CONST Bigint *b; int n;
+#else
+all_on(CONST Bigint *b, int n)
+#endif
+{
+ CONST ULong *x, *xe;
+
+ x = b->x;
+ xe = x + ((unsigned int)n >> kshift);
+ while(x < xe)
+ if ((*x++ & ALL_ON) != ALL_ON)
+ return 0;
+ if (n &= kmask)
+ return ((*x | (ALL_ON << n)) & ALL_ON) == ALL_ON;
+ return 1;
+ }
+
+ Bigint *
+#ifdef KR_headers
+set_ones(b, n) Bigint *b; int n;
+#else
+set_ones(Bigint *b, int n)
+#endif
+{
+ int k;
+ ULong *x, *xe;
+
+ k = (unsigned int)(n + ((1 << kshift) - 1)) >> kshift;
+ if (b->k < k) {
+ Bfree(b);
+ b = Balloc(k);
+ if (b == NULL)
+ return NULL;
+ }
+ k = (unsigned int)n >> kshift;
+ if (n &= kmask)
+ k++;
+ b->wds = k;
+ x = b->x;
+ xe = x + k;
+ while(x < xe)
+ *x++ = ALL_ON;
+ if (n)
+ x[-1] >>= ULbits - n;
+ return b;
+ }
+
+ static int
+rvOK
+#ifdef KR_headers
+ (d, fpi, expt, bits, exact, rd, irv)
+ double d; CONST FPI *fpi; Long *expt; ULong *bits; int exact, rd, *irv;
+#else
+ (double d, CONST FPI *fpi, Long *expt, ULong *bits, int exact, int rd, int *irv)
+#endif
+{
+ Bigint *b;
+ ULong carry, inex, lostbits;
+ int bdif, e, j, k, k1, nb, rv;
+
+ carry = rv = 0;
+ b = d2b(d, &e, &bdif);
+ bdif -= nb = fpi->nbits;
+ e += bdif;
+ if (bdif <= 0) {
+ if (exact)
+ goto trunc;
+ goto ret;
+ }
+ if (P == nb) {
+ if (
+#ifndef IMPRECISE_INEXACT
+ exact &&
+#endif
+ fpi->rounding ==
+#ifdef RND_PRODQUOT
+ FPI_Round_near
+#else
+ Flt_Rounds
+#endif
+ ) goto trunc;
+ goto ret;
+ }
+ switch(rd) {
+ case 1:
+ goto trunc;
+ case 2:
+ break;
+ default: /* round near */
+ k = bdif - 1;
+ if (!k) {
+ if (!exact)
+ goto ret;
+ if (b->x[0] & 2)
+ break;
+ goto trunc;
+ }
+ if (b->x[(unsigned int)k>>kshift] & ((ULong)1 << (k & kmask)))
+ break;
+ goto trunc;
+ }
+ /* "break" cases: round up 1 bit, then truncate; bdif > 0 */
+ carry = 1;
+ trunc:
+ inex = lostbits = 0;
+ if (bdif > 0) {
+ if ( (lostbits = any_on(b, bdif)) !=0)
+ inex = STRTOG_Inexlo;
+ rshift(b, bdif);
+ if (carry) {
+ inex = STRTOG_Inexhi;
+ b = increment(b);
+ if ( (j = nb & kmask) !=0)
+ j = ULbits - j;
+ if (hi0bits(b->x[b->wds - 1]) != j) {
+ if (!lostbits)
+ lostbits = b->x[0] & 1;
+ rshift(b, 1);
+ e++;
+ }
+ }
+ }
+ else if (bdif < 0)
+ b = lshift(b, -bdif);
+ if (e < fpi->emin) {
+ k = fpi->emin - e;
+ e = fpi->emin;
+ if (k > nb || fpi->sudden_underflow) {
+ inex = b->wds = 0;
+ *irv = STRTOG_Underflow | STRTOG_Inexlo;
+ }
+ else {
+ k1 = k - 1;
+ if (k1 > 0 && !lostbits)
+ lostbits = any_on(b, k1);
+ if (!lostbits && !exact)
+ goto ret;
+ lostbits |=
+ carry = b->x[(unsigned int)k1>>kshift] &
+ (ULong)(1 << ((unsigned int)k1 & kmask));
+ rshift(b, k);
+ *irv = STRTOG_Denormal;
+ if (carry) {
+ b = increment(b);
+ inex = STRTOG_Inexhi | STRTOG_Underflow;
+ }
+ else if (lostbits)
+ inex = STRTOG_Inexlo | STRTOG_Underflow;
+ }
+ }
+ else if (e > fpi->emax) {
+ e = fpi->emax + 1;
+ *irv = STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
+#ifndef NO_ERRNO
+ errno = ERANGE;
+#endif
+ inex = b->wds = 0;
+ }
+ *expt = e;
+ copybits(bits, nb, b);
+ *irv |= inex;
+ rv = 1;
+ ret:
+ Bfree(b);
+ return rv;
+ }
+
+#ifndef VAX
+ static int
+#ifdef KR_headers
+mantbits(d) double d;
+#else
+mantbits(double d)
+#endif
+{
+ ULong L;
+#ifdef VAX
+ L = word1(d) << 16 | word1(d) >> 16;
+ if (L)
+#else
+ if ( (L = word1(d)) !=0)
+#endif
+ return P - lo0bits(&L);
+#ifdef VAX
+ L = word0(d) << 16 | word0(d) >> 16 | Exp_msk11;
+#else
+ L = word0(d) | Exp_msk1;
+#endif
+ return P - 32 - lo0bits(&L);
+ }
+#endif /* !VAX */
+
+ int
+strtodg
+#ifdef KR_headers
+ (s00, se, fpi, expt, bits)
+ CONST char *s00; char **se; CONST FPI *fpi; Long *expt; ULong *bits;
+#else
+ (CONST char *s00, char **se, CONST FPI *fpi, Long *expt, ULong *bits)
+#endif
+{
+ int abe, abits, asub;
+ int bb0, bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, decpt, denorm;
+ int dsign, e, e1, e2, emin, esign, finished, i, inex, irv;
+ int j, k, nbits, nd, nd0, nf, nz, nz0, rd, rvbits, rve, rve1, sign;
+ int sudden_underflow = 0; /* pacify gcc */
+ CONST char *s, *s0, *s1;
+ double adj, adj0, rv, tol;
+ Long L;
+ ULong y, z;
+ Bigint *ab, *bb, *bb1, *bd, *bd0, *bs, *delta, *rvb, *rvb0;
+
+ e2 = 0; /* XXX gcc */
+
+ irv = STRTOG_Zero;
+ denorm = sign = nz0 = nz = 0;
+ dval(rv) = 0.;
+ rvb = 0;
+ nbits = fpi->nbits;
+ for(s = s00;;s++) switch(*s) {
+ case '-':
+ sign = 1;
+ /* FALLTHROUGH */
+ case '+':
+ if (*++s)
+ goto break2;
+ /* FALLTHROUGH */
+ case 0:
+ sign = 0;
+ irv = STRTOG_NoNumber;
+ s = s00;
+ goto ret;
+ case '\t':
+ case '\n':
+ case '\v':
+ case '\f':
+ case '\r':
+ case ' ':
+ continue;
+ default:
+ goto break2;
+ }
+ break2:
+ if (*s == '0') {
+#ifndef NO_HEX_FP
+ switch(s[1]) {
+ case 'x':
+ case 'X':
+ irv = gethex(&s, fpi, expt, &rvb, sign);
+ if (irv == STRTOG_NoNumber) {
+ s = s00;
+ sign = 0;
+ }
+ goto ret;
+ }
+#endif
+ nz0 = 1;
+ while(*++s == '0') ;
+ if (!*s)
+ goto ret;
+ }
+ sudden_underflow = fpi->sudden_underflow;
+ s0 = s;
+ y = z = 0;
+ for(decpt = nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
+ if (nd < 9)
+ y = 10*y + c - '0';
+ else if (nd < 16)
+ z = 10*z + c - '0';
+ nd0 = nd;
+#ifdef USE_LOCALE
+ if (c == *localeconv()->decimal_point)
+#else
+ if (c == '.')
+#endif
+ {
+ decpt = 1;
+ c = *++s;
+ if (!nd) {
+ for(; c == '0'; c = *++s)
+ nz++;
+ if (c > '0' && c <= '9') {
+ s0 = s;
+ nf += nz;
+ nz = 0;
+ goto have_dig;
+ }
+ goto dig_done;
+ }
+ for(; c >= '0' && c <= '9'; c = *++s) {
+ have_dig:
+ nz++;
+ if (c -= '0') {
+ nf += nz;
+ for(i = 1; i < nz; i++)
+ if (nd++ < 9)
+ y *= 10;
+ else if (nd <= DBL_DIG + 1)
+ z *= 10;
+ if (nd++ < 9)
+ y = 10*y + c;
+ else if (nd <= DBL_DIG + 1)
+ z = 10*z + c;
+ nz = 0;
+ }
+ }
+ }
+ dig_done:
+ e = 0;
+ if (c == 'e' || c == 'E') {
+ if (!nd && !nz && !nz0) {
+ irv = STRTOG_NoNumber;
+ s = s00;
+ goto ret;
+ }
+ s00 = s;
+ esign = 0;
+ switch(c = *++s) {
+ case '-':
+ esign = 1;
+ /* FALLTHROUGH */
+ case '+':
+ c = *++s;
+ }
+ if (c >= '0' && c <= '9') {
+ while(c == '0')
+ c = *++s;
+ if (c > '0' && c <= '9') {
+ L = c - '0';
+ s1 = s;
+ while((c = *++s) >= '0' && c <= '9')
+ L = 10*L + c - '0';
+ if (s - s1 > 8 || L > 19999)
+ /* Avoid confusion from exponents
+ * so large that e might overflow.
+ */
+ e = 19999; /* safe for 16 bit ints */
+ else
+ e = (int)L;
+ if (esign)
+ e = -e;
+ }
+ else
+ e = 0;
+ }
+ else
+ s = s00;
+ }
+ if (!nd) {
+ if (!nz && !nz0) {
+#ifdef INFNAN_CHECK
+ /* Check for Nan and Infinity */
+ if (!decpt)
+ switch(c) {
+ case 'i':
+ case 'I':
+ if (match(&s,"nf")) {
+ --s;
+ if (!match(&s,"inity"))
+ ++s;
+ irv = STRTOG_Infinite;
+ goto infnanexp;
+ }
+ break;
+ case 'n':
+ case 'N':
+ if (match(&s, "an")) {
+ irv = STRTOG_NaN;
+ *expt = fpi->emax + 1;
+#ifndef No_Hex_NaN
+ if (*s == '(') /*)*/
+ irv = hexnan(&s, fpi, bits);
+#endif
+ goto infnanexp;
+ }
+ }
+#endif /* INFNAN_CHECK */
+ irv = STRTOG_NoNumber;
+ s = s00;
+ }
+ goto ret;
+ }
+
+ irv = STRTOG_Normal;
+ e1 = e -= nf;
+ rd = 0;
+ switch(fpi->rounding & 3) {
+ case FPI_Round_up:
+ rd = 2 - sign;
+ break;
+ case FPI_Round_zero:
+ rd = 1;
+ break;
+ case FPI_Round_down:
+ rd = 1 + sign;
+ }
+
+ /* Now we have nd0 digits, starting at s0, followed by a
+ * decimal point, followed by nd-nd0 digits. The number we're
+ * after is the integer represented by those digits times
+ * 10**e */
+
+ if (!nd0)
+ nd0 = nd;
+ k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
+ dval(rv) = (double)y;
+ if (k > 9)
+ dval(rv) = tens[k - 9] * dval(rv) + z;
+ bd0 = 0;
+ if (nbits <= P && nd <= DBL_DIG) {
+ if (!e) {
+ if (rvOK(dval(rv), fpi, expt, bits, 1, rd, &irv))
+ goto ret;
+ }
+ else if (e > 0) {
+ if (e <= Ten_pmax) {
+#ifdef VAX
+ goto vax_ovfl_check;
+#else
+ i = fivesbits[e] + mantbits(dval(rv)) <= P;
+ /* rv = */ rounded_product(dval(rv), tens[e]);
+ if (rvOK(dval(rv), fpi, expt, bits, i, rd, &irv))
+ goto ret;
+ e1 -= e;
+ goto rv_notOK;
+#endif
+ }
+ i = DBL_DIG - nd;
+ if (e <= Ten_pmax + i) {
+ /* A fancier test would sometimes let us do
+ * this for larger i values.
+ */
+ e2 = e - i;
+ e1 -= i;
+ dval(rv) *= tens[i];
+#ifdef VAX
+ /* VAX exponent range is so narrow we must
+ * worry about overflow here...
+ */
+ vax_ovfl_check:
+ dval(adj) = dval(rv);
+ word0(adj) -= P*Exp_msk1;
+ /* adj = */ rounded_product(dval(adj), tens[e2]);
+ if ((word0(adj) & Exp_mask)
+ > Exp_msk1*(DBL_MAX_EXP+Bias-1-P))
+ goto rv_notOK;
+ word0(adj) += P*Exp_msk1;
+ dval(rv) = dval(adj);
+#else
+ /* rv = */ rounded_product(dval(rv), tens[e2]);
+#endif
+ if (rvOK(dval(rv), fpi, expt, bits, 0, rd, &irv))
+ goto ret;
+ e1 -= e2;
+ }
+ }
+#ifndef Inaccurate_Divide
+ else if (e >= -Ten_pmax) {
+ /* rv = */ rounded_quotient(dval(rv), tens[-e]);
+ if (rvOK(dval(rv), fpi, expt, bits, 0, rd, &irv))
+ goto ret;
+ e1 -= e;
+ }
+#endif
+ }
+ rv_notOK:
+ e1 += nd - k;
+
+ /* Get starting approximation = rv * 10**e1 */
+
+ e2 = 0;
+ if (e1 > 0) {
+ if ( (i = e1 & 15) !=0)
+ dval(rv) *= tens[i];
+ if (e1 &= ~15) {
+ e1 = (unsigned int)e1 >> 4;
+ while(e1 >= (1 << (n_bigtens-1))) {
+ e2 += ((word0(rv) & Exp_mask)
+ >> Exp_shift1) - Bias;
+ word0(rv) &= ~Exp_mask;
+ word0(rv) |= Bias << Exp_shift1;
+ dval(rv) *= bigtens[n_bigtens-1];
+ e1 -= 1 << (n_bigtens-1);
+ }
+ e2 += ((word0(rv) & Exp_mask) >> Exp_shift1) - Bias;
+ word0(rv) &= ~Exp_mask;
+ word0(rv) |= Bias << Exp_shift1;
+ for(j = 0; e1 > 0; j++, e1 = (unsigned int)e1 >> 1)
+ if (e1 & 1)
+ dval(rv) *= bigtens[j];
+ }
+ }
+ else if (e1 < 0) {
+ e1 = -e1;
+ if ( (i = e1 & 15) !=0)
+ dval(rv) /= tens[i];
+ if (e1 &= ~15) {
+ e1 = (unsigned int)e1 >> 4;
+ while(e1 >= (1 << (n_bigtens-1))) {
+ e2 += ((word0(rv) & Exp_mask)
+ >> Exp_shift1) - Bias;
+ word0(rv) &= ~Exp_mask;
+ word0(rv) |= Bias << Exp_shift1;
+ dval(rv) *= tinytens[n_bigtens-1];
+ e1 -= 1 << (n_bigtens-1);
+ }
+ e2 += ((word0(rv) & Exp_mask) >> Exp_shift1) - Bias;
+ word0(rv) &= ~Exp_mask;
+ word0(rv) |= Bias << Exp_shift1;
+ for(j = 0; e1 > 0; j++, e1 = (unsigned int)e1 >> 1)
+ if (e1 & 1)
+ dval(rv) *= tinytens[j];
+ }
+ }
+#ifdef IBM
+ /* e2 is a correction to the (base 2) exponent of the return
+ * value, reflecting adjustments above to avoid overflow in the
+ * native arithmetic. For native IBM (base 16) arithmetic, we
+ * must multiply e2 by 4 to change from base 16 to 2.
+ */
+ e2 <<= 2;
+#endif
+ rvb = d2b(dval(rv), &rve, &rvbits); /* rv = rvb * 2^rve */
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ rve += e2;
+ if ((j = rvbits - nbits) > 0) {
+ rshift(rvb, j);
+ rvbits = nbits;
+ rve += j;
+ }
+ bb0 = 0; /* trailing zero bits in rvb */
+ e2 = rve + rvbits - nbits;
+ if (e2 > fpi->emax + 1)
+ goto huge;
+ rve1 = rve + rvbits - nbits;
+ if (e2 < (emin = fpi->emin)) {
+ denorm = 1;
+ j = rve - emin;
+ if (j > 0) {
+ rvb = lshift(rvb, j);
+ rvbits += j;
+ }
+ else if (j < 0) {
+ rvbits += j;
+ if (rvbits <= 0) {
+ if (rvbits < -1) {
+ ufl:
+ rvb->wds = 0;
+ rvb->x[0] = 0;
+ *expt = emin;
+ irv = STRTOG_Underflow | STRTOG_Inexlo;
+ goto ret;
+ }
+ rvb->x[0] = rvb->wds = rvbits = 1;
+ }
+ else
+ rshift(rvb, -j);
+ }
+ rve = rve1 = emin;
+ if (sudden_underflow && e2 + 1 < emin)
+ goto ufl;
+ }
+
+ /* Now the hard part -- adjusting rv to the correct value.*/
+
+ /* Put digits into bd: true value = bd * 10^e */
+
+ bd0 = s2b(s0, nd0, nd, y);
+
+ for(;;) {
+ bd = Balloc(bd0->k);
+ if (bd == NULL)
+ return STRTOG_NoMemory;
+ Bcopy(bd, bd0);
+ bb = Balloc(rvb->k);
+ if (bb == NULL)
+ return STRTOG_NoMemory;
+ Bcopy(bb, rvb);
+ bbbits = rvbits - bb0;
+ bbe = rve + bb0;
+ bs = i2b(1);
+ if (bs == NULL)
+ return STRTOG_NoMemory;
+
+ if (e >= 0) {
+ bb2 = bb5 = 0;
+ bd2 = bd5 = e;
+ }
+ else {
+ bb2 = bb5 = -e;
+ bd2 = bd5 = 0;
+ }
+ if (bbe >= 0)
+ bb2 += bbe;
+ else
+ bd2 -= bbe;
+ bs2 = bb2;
+ j = nbits + 1 - bbbits;
+ i = bbe + bbbits - nbits;
+ if (i < emin) /* denormal */
+ j += i - emin;
+ bb2 += j;
+ bd2 += j;
+ i = bb2 < bd2 ? bb2 : bd2;
+ if (i > bs2)
+ i = bs2;
+ if (i > 0) {
+ bb2 -= i;
+ bd2 -= i;
+ bs2 -= i;
+ }
+ if (bb5 > 0) {
+ bs = pow5mult(bs, bb5);
+ if (bs == NULL)
+ return STRTOG_NoMemory;
+ bb1 = mult(bs, bb);
+ if (bb1 == NULL)
+ return STRTOG_NoMemory;
+ Bfree(bb);
+ bb = bb1;
+ }
+ bb2 -= bb0;
+ if (bb2 > 0) {
+ bb = lshift(bb, bb2);
+ if (bb == NULL)
+ return STRTOG_NoMemory;
+ }
+ else if (bb2 < 0)
+ rshift(bb, -bb2);
+ if (bd5 > 0) {
+ bd = pow5mult(bd, bd5);
+ if (bd == NULL)
+ return STRTOG_NoMemory;
+ }
+ if (bd2 > 0) {
+ bd = lshift(bd, bd2);
+ if (bd == NULL)
+ return STRTOG_NoMemory;
+ }
+ if (bs2 > 0) {
+ bs = lshift(bs, bs2);
+ if (bs == NULL)
+ return STRTOG_NoMemory;
+ }
+ asub = 1;
+ inex = STRTOG_Inexhi;
+ delta = diff(bb, bd);
+ if (delta == NULL)
+ return STRTOG_NoMemory;
+ if (delta->wds <= 1 && !delta->x[0])
+ break;
+ dsign = delta->sign;
+ delta->sign = finished = 0;
+ L = 0;
+ i = cmp(delta, bs);
+ if (rd && i <= 0) {
+ irv = STRTOG_Normal;
+ if ( (finished = dsign ^ (rd&1)) !=0) {
+ if (dsign != 0) {
+ irv |= STRTOG_Inexhi;
+ goto adj1;
+ }
+ irv |= STRTOG_Inexlo;
+ if (rve1 == emin)
+ goto adj1;
+ for(i = 0, j = nbits; j >= ULbits;
+ i++, j -= ULbits) {
+ if (rvb->x[i] & ALL_ON)
+ goto adj1;
+ }
+ if (j > 1 && lo0bits(rvb->x + i) < j - 1)
+ goto adj1;
+ rve = rve1 - 1;
+ rvb = set_ones(rvb, rvbits = nbits);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ break;
+ }
+ irv |= dsign ? STRTOG_Inexlo : STRTOG_Inexhi;
+ break;
+ }
+ if (i < 0) {
+ /* Error is less than half an ulp -- check for
+ * special case of mantissa a power of two.
+ */
+ irv = dsign
+ ? STRTOG_Normal | STRTOG_Inexlo
+ : STRTOG_Normal | STRTOG_Inexhi;
+ if (dsign || bbbits > 1 || denorm || rve1 == emin)
+ break;
+ delta = lshift(delta,1);
+ if (delta == NULL)
+ return STRTOG_NoMemory;
+ if (cmp(delta, bs) > 0) {
+ irv = STRTOG_Normal | STRTOG_Inexlo;
+ goto drop_down;
+ }
+ break;
+ }
+ if (i == 0) {
+ /* exactly half-way between */
+ if (dsign) {
+ if (denorm && all_on(rvb, rvbits)) {
+ /*boundary case -- increment exponent*/
+ rvb->wds = 1;
+ rvb->x[0] = 1;
+ rve = emin + nbits - (rvbits = 1);
+ irv = STRTOG_Normal | STRTOG_Inexhi;
+ denorm = 0;
+ break;
+ }
+ irv = STRTOG_Normal | STRTOG_Inexlo;
+ }
+ else if (bbbits == 1) {
+ irv = STRTOG_Normal;
+ drop_down:
+ /* boundary case -- decrement exponent */
+ if (rve1 == emin) {
+ irv = STRTOG_Normal | STRTOG_Inexhi;
+ if (rvb->wds == 1 && rvb->x[0] == 1)
+ sudden_underflow = 1;
+ break;
+ }
+ rve -= nbits;
+ rvb = set_ones(rvb, rvbits = nbits);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ break;
+ }
+ else
+ irv = STRTOG_Normal | STRTOG_Inexhi;
+ if ((bbbits < nbits && !denorm) || !(rvb->x[0] & 1))
+ break;
+ if (dsign) {
+ rvb = increment(rvb);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ if ( (j = rvbits & kmask) !=0)
+ j = ULbits - j;
+ if (hi0bits(rvb->x[(unsigned int)(rvb->wds - 1)
+ >> kshift])
+ != j)
+ rvbits++;
+ irv = STRTOG_Normal | STRTOG_Inexhi;
+ }
+ else {
+ if (bbbits == 1)
+ goto undfl;
+ decrement(rvb);
+ irv = STRTOG_Normal | STRTOG_Inexlo;
+ }
+ break;
+ }
+ if ((dval(adj) = ratio(delta, bs)) <= 2.) {
+ adj1:
+ inex = STRTOG_Inexlo;
+ if (dsign) {
+ asub = 0;
+ inex = STRTOG_Inexhi;
+ }
+ else if (denorm && bbbits <= 1) {
+ undfl:
+ rvb->wds = 0;
+ rve = emin;
+ irv = STRTOG_Underflow | STRTOG_Inexlo;
+ break;
+ }
+ adj0 = dval(adj) = 1.;
+ }
+ else {
+ adj0 = dval(adj) *= 0.5;
+ if (dsign) {
+ asub = 0;
+ inex = STRTOG_Inexlo;
+ }
+ if (dval(adj) < 2147483647.) {
+ L = (INT32)adj0;
+ adj0 -= L;
+ switch(rd) {
+ case 0:
+ if (adj0 >= .5)
+ goto inc_L;
+ break;
+ case 1:
+ if (asub && adj0 > 0.)
+ goto inc_L;
+ break;
+ case 2:
+ if (!asub && adj0 > 0.) {
+ inc_L:
+ L++;
+ inex = STRTOG_Inexact - inex;
+ }
+ }
+ dval(adj) = (double)L;
+ }
+ }
+ y = rve + rvbits;
+
+ /* adj *= ulp(dval(rv)); */
+ /* if (asub) rv -= adj; else rv += adj; */
+
+ if (!denorm && rvbits < nbits) {
+ rvb = lshift(rvb, j = nbits - rvbits);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ rve -= j;
+ rvbits = nbits;
+ }
+ ab = d2b(dval(adj), &abe, &abits);
+ if (ab == NULL)
+ return STRTOG_NoMemory;
+ if (abe < 0)
+ rshift(ab, -abe);
+ else if (abe > 0)
+ ab = lshift(ab, abe);
+ rvb0 = rvb;
+ if (asub) {
+ /* rv -= adj; */
+ j = hi0bits(rvb->x[rvb->wds-1]);
+ rvb = diff(rvb, ab);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ k = rvb0->wds - 1;
+ if (denorm)
+ /* do nothing */;
+ else if (rvb->wds <= k
+ || hi0bits( rvb->x[k]) >
+ hi0bits(rvb0->x[k])) {
+ /* unlikely; can only have lost 1 high bit */
+ if (rve1 == emin) {
+ --rvbits;
+ denorm = 1;
+ }
+ else {
+ rvb = lshift(rvb, 1);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ --rve;
+ --rve1;
+ L = finished = 0;
+ }
+ }
+ }
+ else {
+ rvb = sum(rvb, ab);
+ if (rvb == NULL)
+ return STRTOG_NoMemory;
+ k = rvb->wds - 1;
+ if (k >= rvb0->wds
+ || hi0bits(rvb->x[k]) < hi0bits(rvb0->x[k])) {
+ if (denorm) {
+ if (++rvbits == nbits)
+ denorm = 0;
+ }
+ else {
+ rshift(rvb, 1);
+ rve++;
+ rve1++;
+ L = 0;
+ }
+ }
+ }
+ Bfree(ab);
+ Bfree(rvb0);
+ if (finished)
+ break;
+
+ z = rve + rvbits;
+ if (y == z && L) {
+ /* Can we stop now? */
+ tol = dval(adj) * 5e-16; /* > max rel error */
+ dval(adj) = adj0 - .5;
+ if (dval(adj) < -tol) {
+ if (adj0 > tol) {
+ irv |= inex;
+ break;
+ }
+ }
+ else if (dval(adj) > tol && adj0 < 1. - tol) {
+ irv |= inex;
+ break;
+ }
+ }
+ bb0 = denorm ? 0 : trailz(rvb);
+ Bfree(bb);
+ Bfree(bd);
+ Bfree(bs);
+ Bfree(delta);
+ }
+ if (!denorm && (j = nbits - rvbits)) {
+ if (j > 0)
+ rvb = lshift(rvb, j);
+ else
+ rshift(rvb, -j);
+ rve -= j;
+ }
+ *expt = rve;
+ Bfree(bb);
+ Bfree(bd);
+ Bfree(bs);
+ Bfree(bd0);
+ Bfree(delta);
+ if (rve > fpi->emax) {
+ huge:
+ rvb->wds = 0;
+ irv = STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
+#ifndef NO_ERRNO
+ errno = ERANGE;
+#endif
+#ifdef INFNAN_CHECK
+ infnanexp:
+#endif
+ *expt = fpi->emax + 1;
+ }
+ ret:
+ if (denorm) {
+ if (sudden_underflow) {
+ rvb->wds = 0;
+ irv = STRTOG_Underflow | STRTOG_Inexlo;
+ }
+ else {
+ irv = (irv & ~STRTOG_Retmask) |
+ (rvb->wds > 0 ? STRTOG_Denormal : STRTOG_Zero);
+ if (irv & STRTOG_Inexact)
+ irv |= STRTOG_Underflow;
+ }
+ }
+ if (se)
+ *se = __UNCONST(s);
+ if (sign)
+ irv |= STRTOG_Neg;
+ if (rvb) {
+ copybits(bits, nbits, rvb);
+ Bfree(rvb);
+ }
+ return irv;
+ }
diff --git a/StdLib/LibC/gdtoa/strtof.c b/StdLib/LibC/gdtoa/strtof.c new file mode 100644 index 0000000000..44a4cb3746 --- /dev/null +++ b/StdLib/LibC/gdtoa/strtof.c @@ -0,0 +1,85 @@ +/* $NetBSD: strtof.c,v 1.2.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 2000 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "namespace.h"
+#include "gdtoaimp.h"
+
+#ifdef __weak_alias
+__weak_alias(strtof, _strtof)
+#endif
+
+ float
+#ifdef KR_headers
+strtof(s, sp) CONST char *s; char **sp;
+#else
+strtof(CONST char *s, char **sp)
+#endif
+{
+ static CONST FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, SI };
+ ULong bits[1];
+ Long expt;
+ int k;
+ union { ULong L[1]; float f; } u = { 0 };
+
+ k = strtodg(s, sp, &fpi, &expt, bits);
+ if (k == STRTOG_NoMemory) {
+ errno = ERANGE;
+ return HUGE_VALF;
+ }
+ switch(k & STRTOG_Retmask) {
+ case STRTOG_NoNumber:
+ case STRTOG_Zero:
+ u.L[0] = 0;
+ break;
+
+ case STRTOG_Normal:
+ case STRTOG_NaNbits:
+ u.L[0] = (bits[0] & 0x7fffff) | ((expt + 0x7f + 23) << 23);
+ break;
+
+ case STRTOG_Denormal:
+ u.L[0] = bits[0];
+ break;
+
+ case STRTOG_Infinite:
+ u.L[0] = 0x7f800000;
+ break;
+
+ case STRTOG_NaN:
+ u.L[0] = f_QNAN;
+ }
+ if (k & STRTOG_Neg)
+ u.L[0] |= 0x80000000L;
+ return u.f;
+ }
diff --git a/StdLib/LibC/gdtoa/strtold_px.c b/StdLib/LibC/gdtoa/strtold_px.c new file mode 100644 index 0000000000..f5920b2c4c --- /dev/null +++ b/StdLib/LibC/gdtoa/strtold_px.c @@ -0,0 +1,4 @@ +/* $NetBSD: strtold_px.c,v 1.1 2006/03/15 17:35:18 kleink Exp $ */
+
+#define GDTOA_LD_FMT x
+#include "strtold_subr.c"
diff --git a/StdLib/LibC/gdtoa/strtold_subr.c b/StdLib/LibC/gdtoa/strtold_subr.c new file mode 100644 index 0000000000..db85fe8f23 --- /dev/null +++ b/StdLib/LibC/gdtoa/strtold_subr.c @@ -0,0 +1,45 @@ +/* $NetBSD: strtold_subr.c,v 1.1 2006/03/15 17:35:18 kleink Exp $ */
+
+/*
+ * Written by Klaus Klein <kleink@NetBSD.org>, November 16, 2005.
+ * Public domain.
+ */
+
+/*
+ * NOTICE: This is not a standalone file. To use it, #include it in
+ * the format-specific strtold_*.c, like so:
+ *
+ * #define GDTOA_LD_FMT <gdtoa extended-precision format code>
+ * #include "strtold_subr.c"
+ */
+#include <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#include "namespace.h"
+#include <math.h>
+#include <sys/stdint.h>
+#include <stdlib.h>
+#include "gdtoa.h"
+
+#ifdef __weak_alias
+__weak_alias(strtold, _strtold)
+#endif
+
+#ifndef __HAVE_LONG_DOUBLE
+#error no extended-precision long double type
+#endif
+
+#ifndef GDTOA_LD_FMT
+#error GDTOA_LD_FMT must be defined by format-specific source file
+#endif
+
+#define STRTOP(x) __CONCAT(strtop, x)
+
+long double
+strtold(const char *nptr, char **endptr)
+{
+ long double ld;
+
+ (void)STRTOP(GDTOA_LD_FMT)(nptr, endptr, &ld);
+ return ld;
+}
diff --git a/StdLib/LibC/gdtoa/strtopx.c b/StdLib/LibC/gdtoa/strtopx.c new file mode 100644 index 0000000000..5dce12e0c6 --- /dev/null +++ b/StdLib/LibC/gdtoa/strtopx.c @@ -0,0 +1,108 @@ +/* $NetBSD: strtopx.c,v 1.3.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 2000 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#undef _0
+#undef _1
+
+/* one or the other of IEEE_BIG_ENDIAN or IEEE_LITTLE_ENDIAN should be #defined */
+
+#ifdef IEEE_BIG_ENDIAN
+#define _0 0
+#define _1 1
+#define _2 2
+#define _3 3
+#define _4 4
+#endif
+#ifdef IEEE_LITTLE_ENDIAN
+#define _0 4
+#define _1 3
+#define _2 2
+#define _3 1
+#define _4 0
+#endif
+
+ int
+#ifdef KR_headers
+strtopx(s, sp, V) CONST char *s; char **sp; void *V;
+#else
+strtopx(CONST char *s, char **sp, void *V)
+#endif
+{
+ static CONST FPI fpi = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
+ ULong bits[2];
+ Long expt;
+ int k;
+ UShort *L = (UShort*)V;
+
+ k = strtodg(s, sp, &fpi, &expt, bits);
+ if (k == STRTOG_NoMemory)
+ return k;
+ switch(k & STRTOG_Retmask) {
+ case STRTOG_NoNumber:
+ case STRTOG_Zero:
+ L[0] = L[1] = L[2] = L[3] = L[4] = 0;
+ break;
+
+ case STRTOG_Denormal:
+ L[_0] = 0;
+ goto normal_bits;
+
+ case STRTOG_Normal:
+ case STRTOG_NaNbits:
+ L[_0] = (UShort)(expt + 0x3fff + 63);
+ normal_bits:
+ L[_4] = (UShort)bits[0];
+ L[_3] = (UShort)(bits[0] >> 16);
+ L[_2] = (UShort)bits[1];
+ L[_1] = (UShort)(bits[1] >> 16);
+ break;
+
+ case STRTOG_Infinite:
+ L[_0] = 0x7fff;
+ L[_1] = L[_2] = L[_3] = L[_4] = 0;
+ break;
+
+ case STRTOG_NaN:
+ L[0] = ldus_QNAN0;
+ L[1] = ldus_QNAN1;
+ L[2] = ldus_QNAN2;
+ L[3] = ldus_QNAN3;
+ L[4] = ldus_QNAN4;
+ }
+ if (k & STRTOG_Neg)
+ L[_0] |= 0x8000;
+ return k;
+ }
diff --git a/StdLib/LibC/gdtoa/sum.c b/StdLib/LibC/gdtoa/sum.c new file mode 100644 index 0000000000..850c1f0134 --- /dev/null +++ b/StdLib/LibC/gdtoa/sum.c @@ -0,0 +1,105 @@ +/* $NetBSD: sum.c,v 1.1.1.1.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+ Bigint *
+#ifdef KR_headers
+sum(a, b) Bigint *a; Bigint *b;
+#else
+sum(Bigint *a, Bigint *b)
+#endif
+{
+ Bigint *c;
+ ULong carry, *xc, *xa, *xb, *xe, y;
+#ifdef Pack_32
+ ULong z;
+#endif
+
+ if (a->wds < b->wds) {
+ c = b; b = a; a = c;
+ }
+ c = Balloc(a->k);
+ if (c == NULL)
+ return NULL;
+ c->wds = a->wds;
+ carry = 0;
+ xa = a->x;
+ xb = b->x;
+ xc = c->x;
+ xe = xc + b->wds;
+#ifdef Pack_32
+ do {
+ y = (*xa & 0xffff) + (*xb & 0xffff) + carry;
+ carry = (y & 0x10000) >> 16;
+ z = (*xa++ >> 16) + (*xb++ >> 16) + carry;
+ carry = (z & 0x10000) >> 16;
+ Storeinc(xc, z, y);
+ }
+ while(xc < xe);
+ xe += a->wds - b->wds;
+ while(xc < xe) {
+ y = (*xa & 0xffff) + carry;
+ carry = (y & 0x10000) >> 16;
+ z = (*xa++ >> 16) + carry;
+ carry = (z & 0x10000) >> 16;
+ Storeinc(xc, z, y);
+ }
+#else
+ do {
+ y = *xa++ + *xb++ + carry;
+ carry = (y & 0x10000) >> 16;
+ *xc++ = y & 0xffff;
+ }
+ while(xc < xe);
+ xe += a->wds - b->wds;
+ while(xc < xe) {
+ y = *xa++ + carry;
+ carry = (y & 0x10000) >> 16;
+ *xc++ = y & 0xffff;
+ }
+#endif
+ if (carry) {
+ if (c->wds == c->maxwds) {
+ b = Balloc(c->k + 1);
+ if (b == NULL)
+ return NULL;
+ Bcopy(b, c);
+ Bfree(c);
+ c = b;
+ }
+ c->x[c->wds++] = 1;
+ }
+ return c;
+ }
diff --git a/StdLib/LibC/gdtoa/ulp.c b/StdLib/LibC/gdtoa/ulp.c new file mode 100644 index 0000000000..6f2780cf02 --- /dev/null +++ b/StdLib/LibC/gdtoa/ulp.c @@ -0,0 +1,73 @@ +/* $NetBSD: ulp.c,v 1.2 2006/01/25 15:27:42 kleink Exp $ */
+
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 1999 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to "."). */
+#include <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+ double
+ulp
+#ifdef KR_headers
+ (x) double x;
+#else
+ (double x)
+#endif
+{
+ Long L;
+ double a;
+
+ L = (word0(x) & Exp_mask) - (P-1)*Exp_msk1;
+#ifndef Sudden_Underflow
+ if (L > 0) {
+#endif
+#ifdef IBM
+ L |= Exp_msk1 >> 4;
+#endif
+ word0(a) = (UINT32)L;
+ word1(a) = 0;
+#ifndef Sudden_Underflow
+ }
+ else {
+ L = (unsigned int)-L >> Exp_shift;
+ if (L < Exp_shift) {
+ word0(a) = 0x80000 >> L;
+ word1(a) = 0;
+ }
+ else {
+ word0(a) = 0;
+ L -= Exp_shift;
+ word1(a) = L >= 31 ? 1 : 1 << (31 - L);
+ }
+ }
+#endif
+ return a;
+ }
|