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/Include/x86/ieee.h | |
| 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/Include/x86/ieee.h')
| -rw-r--r-- | StdLib/Include/x86/ieee.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/StdLib/Include/x86/ieee.h b/StdLib/Include/x86/ieee.h new file mode 100644 index 0000000000..f4326b0bc1 --- /dev/null +++ b/StdLib/Include/x86/ieee.h @@ -0,0 +1,107 @@ +/* $NetBSD: ieee.h,v 1.9.32.1 2007/05/07 19:49:10 pavel Exp $ */
+
+/*
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Lawrence Berkeley Laboratory.
+ *
+ * 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. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ * @(#)ieee.h 8.1 (Berkeley) 6/11/93
+ */
+
+/*
+ * ieee.h defines the machine-dependent layout of the machine's IEEE
+ * floating point. It does *not* define (yet?) any of the rounding
+ * mode bits, exceptions, and so forth.
+ */
+
+#include <sys/ieee754.h>
+
+#define EXT_EXPBITS 15
+#define EXT_FRACHBITS 32
+#define EXT_FRACLBITS 32
+#define EXT_FRACBITS (EXT_FRACLBITS + EXT_FRACHBITS)
+
+#define EXT_TO_ARRAY32(u, a) do { \
+ (a)[0] = (uint32_t)(u).extu_ext.ext_fracl; \
+ (a)[1] = (uint32_t)(u).extu_ext.ext_frach; \
+} while(/*CONSTCOND*/0)
+
+/*
+ * struct ieee_ext is the raw storage layout of the 80-bit
+ * extended-precision type as implemented by the FPU. Per the
+ * respective ABI specifications, it is followed by a tail padding of
+ *
+ * amd64: 48 bits,
+ * i386: 16 bits.
+ */
+struct ieee_ext {
+ u_int ext_fracl:EXT_FRACLBITS;
+ u_int ext_frach:EXT_FRACHBITS;
+#if 0
+ u_int ext_int:1;
+#endif
+ u_int ext_exp:EXT_EXPBITS;
+ u_int ext_sign:1;
+};
+
+/*
+ * Floats whose exponent is in [1..INFNAN) (of whatever type) are
+ * `normal'. Floats whose exponent is INFNAN are either Inf or NaN.
+ * Floats whose exponent is zero are either zero (iff all fraction
+ * bits are zero) or subnormal values.
+ *
+ * A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its
+ * high fraction; if the bit is set, it is a `quiet NaN'.
+ */
+#define EXT_EXP_INFNAN 32767
+
+#if 0
+#define SNG_QUIETNAN (1 << 22)
+#define DBL_QUIETNAN (1 << 19)
+#define EXT_QUIETNAN (1 << 30)
+#endif
+
+/*
+ * Exponent biases.
+ */
+#define EXT_EXP_BIAS 16383
+
+/*
+ * Convenience data structures.
+ */
+union ieee_ext_u {
+ long double extu_ld;
+ struct ieee_ext extu_ext;
+};
|