StdLib/LibC: Add software floating point library from NetBSD

Floating point processing is not supported on ARM for UEFI. In order to
support UEFI applications in AppPkg we use this library to provide the
required functionality.

Changes as compared to the NetBSD version:
- Formatting changes (tabs to spaces, DOS line endings etc).
- Disable exceptions as described in the float_raise() function.
- Disable definition of 'Symbolic Boolean literals' in milieu.h.

Source originally from: NetBSD project
- Source: http://cvsweb.netbsd.org/bsdweb.cgi/?only_with_tag=MAIN
- Licensing and Copyright: http://www.netbsd.org/about/redistribution.html

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Harry Liebel <Harry.Liebel@arm.com>
Reviewed-by: Olivier Martin <Olivier.Martin@arm.com>
Reviewed-by: Daryl McDaniel <edk2-lists@mc2research.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18116 6f19259b-4bc3-4df7-8a09-765794883524

5 files changed, 581 insertions, 0 deletions

diff --git a/StdLib/Include/Arm/arm-gcc.h b/StdLib/Include/Arm/arm-gcc.h
new file mode 100644
index 0000000000..8cd4989998
--- /dev/null
+++ b/StdLib/Include/Arm/arm-gcc.h
@@ -0,0 +1,114 @@
+/** @file

+

+  Copyright (c) 2014, ARM Limited. All rights reserved.

+

+  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.

+

+**/

+

+/* $NetBSD: arm-gcc.h,v 1.4 2013/01/26 07:08:14 matt Exp $ */

+

+/*

+-------------------------------------------------------------------------------

+One of the macros `BIGENDIAN' or `LITTLEENDIAN' must be defined.

+-------------------------------------------------------------------------------

+*/

+#ifdef __ARMEB__

+#define BIGENDIAN

+#else

+#define LITTLEENDIAN

+#endif

+

+/*

+-------------------------------------------------------------------------------

+The macro `BITS64' can be defined to indicate that 64-bit integer types are

+supported by the compiler.

+-------------------------------------------------------------------------------

+*/

+#define BITS64

+

+/*

+-------------------------------------------------------------------------------

+Each of the following `typedef's defines the most convenient type that holds

+integers of at least as many bits as specified.  For example, `uint8' should

+be the most convenient type that can hold unsigned integers of as many as

+8 bits.  The `flag' type must be able to hold either a 0 or 1.  For most

+implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed

+to the same as `int'.

+-------------------------------------------------------------------------------

+*/

+typedef int flag;

+typedef int uint8;

+typedef int int8;

+typedef int uint16;

+typedef int int16;

+typedef unsigned int uint32;

+typedef signed int int32;

+#ifdef BITS64

+typedef unsigned long long int uint64;

+typedef signed long long int int64;

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Each of the following `typedef's defines a type that holds integers

+of _exactly_ the number of bits specified.  For instance, for most

+implementation of C, `bits16' and `sbits16' should be `typedef'ed to

+`unsigned short int' and `signed short int' (or `short int'), respectively.

+-------------------------------------------------------------------------------

+*/

+typedef unsigned char bits8;

+typedef signed char sbits8;

+typedef unsigned short int bits16;

+typedef signed short int sbits16;

+typedef unsigned int bits32;

+typedef signed int sbits32;

+#ifdef BITS64

+typedef unsigned long long int bits64;

+typedef signed long long int sbits64;

+#endif

+

+#ifdef BITS64

+/*

+-------------------------------------------------------------------------------

+The `LIT64' macro takes as its argument a textual integer literal and

+if necessary ``marks'' the literal as having a 64-bit integer type.

+For example, the GNU C Compiler (`gcc') requires that 64-bit literals be

+appended with the letters `LL' standing for `long long', which is `gcc's

+name for the 64-bit integer type.  Some compilers may allow `LIT64' to be

+defined as the identity macro:  `#define LIT64( a ) a'.

+-------------------------------------------------------------------------------

+*/

+#define LIT64( a ) a##ULL

+#endif

+

+/*

+-------------------------------------------------------------------------------

+The macro `INLINE' can be used before functions that should be inlined.  If

+a compiler does not support explicit inlining, this macro should be defined

+to be `static'.

+-------------------------------------------------------------------------------

+*/

+#define INLINE static inline

+

+/*

+-------------------------------------------------------------------------------

+The ARM FPA is odd in that it stores doubles high-order word first, no matter

+what the endianness of the CPU.  VFP is sane.

+-------------------------------------------------------------------------------

+*/

+#if defined(SOFTFLOAT_FOR_GCC)

+#if defined(__VFP_FP__) || defined(__ARMEB__)

+#define FLOAT64_DEMANGLE(a) (a)

+#define FLOAT64_MANGLE(a)   (a)

+#else

+#define FLOAT64_DEMANGLE(a) (((a) << 32) | ((a) >> 32))

+#define FLOAT64_MANGLE(a)   FLOAT64_DEMANGLE(a)

+#endif

+#endif

diff --git a/StdLib/Include/Arm/machine/fenv.h b/StdLib/Include/Arm/machine/fenv.h
new file mode 100644
index 0000000000..cdca48c094
--- /dev/null
+++ b/StdLib/Include/Arm/machine/fenv.h
@@ -0,0 +1,55 @@
+/*  $NetBSD: fenv.h,v 1.2 2014/01/29 00:22:09 matt Exp $    */

+/** @file

+*

+*  Copyright (c) 2013 - 2014, ARM Limited. All rights reserved.

+*

+*  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.

+*

+**/

+ /*

+ * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995

+ * Public domain.

+ */

+

+#ifndef _ARM_FENV_H_

+#define _ARM_FENV_H_

+

+#ifdef __ARM_PCS_AAPCS64

+/* AArch64 split FPSCR into two registers FPCR and FPSR */

+typedef struct {

+    unsigned int __fpcr;

+    unsigned int __fpsr;

+} fenv_t;

+#else

+typedef int fenv_t;     /* FPSCR */

+#endif

+typedef int fexcept_t;

+

+#define FE_INVALID      0x01    /* invalid operation exception */

+#define FE_DIVBYZERO    0x02    /* divide-by-zero exception */

+#define FE_OVERFLOW     0x04    /* overflow exception */

+#define FE_UNDERFLOW    0x08    /* underflow exception */

+#define FE_INEXACT      0x10    /* imprecise (loss of precision; "inexact") */

+

+#define FE_ALL_EXCEPT   0x1f

+

+#define FE_TONEAREST    0   /* round to nearest representable number */

+#define FE_UPWARD       1   /* round toward positive infinity */

+#define FE_DOWNWARD     2   /* round toward negative infinity */

+#define FE_TOWARDZERO   3   /* round to zero (truncate) */

+

+__BEGIN_DECLS

+

+/* Default floating-point environment */

+extern const fenv_t   __fe_dfl_env;

+#define FE_DFL_ENV    (&__fe_dfl_env)

+

+__END_DECLS

+

+#endif /* _ARM_FENV_H_ */

diff --git a/StdLib/Include/Arm/machine/ieeefp.h b/StdLib/Include/Arm/machine/ieeefp.h
new file mode 100644
index 0000000000..c3de5ef726
--- /dev/null
+++ b/StdLib/Include/Arm/machine/ieeefp.h
@@ -0,0 +1,58 @@
+/*  $NetBSD: ieeefp.h,v 1.3 2013/04/23 05:42:23 matt Exp $  */

+/** @file

+*

+*  Copyright (c) 2013 - 2014, ARM Limited. All rights reserved.

+*

+*  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.

+*

+**/

+/*

+ * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995

+ * Public domain.

+ */

+

+#ifndef _ARM_IEEEFP_H_

+#define _ARM_IEEEFP_H_

+

+#include <LibConfig.h>

+#include <sys/featuretest.h>

+

+#if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)

+

+//#include <arm/fenv.h>

+#include <machine/fenv.h>

+

+#if !defined(_ISOC99_SOURCE)

+

+/* Exception type (used by fpsetmask() et al.) */

+

+typedef int fp_except;

+

+/* Bit defines for fp_except */

+

+#define FP_X_INV    FE_INVALID      /* invalid operation exception */

+#define FP_X_DZ     FE_DIVBYZERO    /* divide-by-zero exception */

+#define FP_X_OFL    FE_OVERFLOW     /* overflow exception */

+#define FP_X_UFL    FE_UNDERFLOW    /* underflow exception */

+#define FP_X_IMP    FE_INEXACT      /* imprecise (prec. loss; "inexact") */

+

+/* Rounding modes */

+

+typedef enum {

+    FP_RN=FE_TONEAREST,     /* round to nearest representable number */

+    FP_RP=FE_UPWARD,        /* round toward positive infinity */

+    FP_RM=FE_DOWNWARD,      /* round toward negative infinity */

+    FP_RZ=FE_TOWARDZERO     /* round to zero (truncate) */

+} fp_rnd;

+

+#endif /* !_ISOC99_SOURCE */

+

+#endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */

+

+#endif /* _ARM_IEEEFP_H_ */

diff --git a/StdLib/Include/Arm/milieu.h b/StdLib/Include/Arm/milieu.h
new file mode 100644
index 0000000000..8f4ac00076
--- /dev/null
+++ b/StdLib/Include/Arm/milieu.h
@@ -0,0 +1,38 @@
+/* $NetBSD: milieu.h,v 1.1 2000/12/29 20:13:54 bjh21 Exp $ */

+

+/*

+===============================================================================

+

+This C header file is part of the SoftFloat IEC/IEEE Floating-point

+Arithmetic Package, Release 2a.

+

+Written by John R. Hauser.  This work was made possible in part by the

+International Computer Science Institute, located at Suite 600, 1947 Center

+Street, Berkeley, California 94704.  Funding was partially provided by the

+National Science Foundation under grant MIP-9311980.  The original version

+of this code was written as part of a project to build a fixed-point vector

+processor in collaboration with the University of California at Berkeley,

+overseen by Profs. Nelson Morgan and John Wawrzynek.  More information

+is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/

+arithmetic/SoftFloat.html'.

+

+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort

+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT

+TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO

+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY

+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.

+

+Derivative works are acceptable, even for commercial purposes, so long as

+(1) they include prominent notice that the work is derivative, and (2) they

+include prominent notice akin to these four paragraphs for those parts of

+this code that are retained.

+

+===============================================================================

+*/

+

+/*

+-------------------------------------------------------------------------------

+Include common integer types and flags.

+-------------------------------------------------------------------------------

+*/

+#include "arm-gcc.h"

diff --git a/StdLib/Include/Arm/softfloat.h b/StdLib/Include/Arm/softfloat.h
new file mode 100644
index 0000000000..d52c5a9f8d
--- /dev/null
+++ b/StdLib/Include/Arm/softfloat.h
@@ -0,0 +1,316 @@
+/*  $NetBSD: softfloat.h,v 1.10 2013/04/24 18:04:46 matt Exp $  */

+

+/* This is a derivative work. */

+

+/*

+===============================================================================

+

+This C header file is part of the SoftFloat IEC/IEEE Floating-point

+Arithmetic Package, Release 2a.

+

+Written by John R. Hauser.  This work was made possible in part by the

+International Computer Science Institute, located at Suite 600, 1947 Center

+Street, Berkeley, California 94704.  Funding was partially provided by the

+National Science Foundation under grant MIP-9311980.  The original version

+of this code was written as part of a project to build a fixed-point vector

+processor in collaboration with the University of California at Berkeley,

+overseen by Profs. Nelson Morgan and John Wawrzynek.  More information

+is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/

+arithmetic/SoftFloat.html'.

+

+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort

+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT

+TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO

+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY

+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.

+

+Derivative works are acceptable, even for commercial purposes, so long as

+(1) they include prominent notice that the work is derivative, and (2) they

+include prominent notice akin to these four paragraphs for those parts of

+this code that are retained.

+

+===============================================================================

+*/

+

+/*

+-------------------------------------------------------------------------------

+The macro `FLOATX80' must be defined to enable the extended double-precision

+floating-point format `floatx80'.  If this macro is not defined, the

+`floatx80' type will not be defined, and none of the functions that either

+input or output the `floatx80' type will be defined.  The same applies to

+the `FLOAT128' macro and the quadruple-precision format `float128'.

+-------------------------------------------------------------------------------

+*/

+/* #define FLOATX80 */

+/* #define FLOAT128 */

+

+#include <stdint.h>

+#include <machine/ieeefp.h>

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE floating-point types.

+-------------------------------------------------------------------------------

+*/

+typedef unsigned int float32;

+typedef unsigned long long float64;

+#ifdef FLOATX80

+typedef struct {

+    unsigned short high;

+    unsigned long long low;

+} floatx80;

+#endif

+#ifdef FLOAT128

+typedef struct {

+    unsigned long long high, low;

+} float128;

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE floating-point underflow tininess-detection mode.

+-------------------------------------------------------------------------------

+*/

+#ifndef SOFTFLOAT_FOR_GCC

+extern int float_detect_tininess;

+#endif

+enum {

+    float_tininess_after_rounding  = 0,

+    float_tininess_before_rounding = 1

+};

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE floating-point rounding mode.

+-------------------------------------------------------------------------------

+*/

+extern fp_rnd float_rounding_mode;

+#define float_round_nearest_even FP_RN

+#define float_round_to_zero      FP_RZ

+#define float_round_down         FP_RM

+#define float_round_up           FP_RP

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE floating-point exception flags.

+-------------------------------------------------------------------------------

+*/

+extern fp_except float_exception_flags;

+extern fp_except float_exception_mask;

+enum {

+    float_flag_inexact   = FP_X_IMP,

+    float_flag_underflow = FP_X_UFL,

+    float_flag_overflow  = FP_X_OFL,

+    float_flag_divbyzero = FP_X_DZ,

+    float_flag_invalid   = FP_X_INV

+};

+

+/*

+-------------------------------------------------------------------------------

+Routine to raise any or all of the software IEC/IEEE floating-point

+exception flags.

+-------------------------------------------------------------------------------

+*/

+void float_raise( fp_except );

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE integer-to-floating-point conversion routines.

+-------------------------------------------------------------------------------

+*/

+float32 int32_to_float32( int32 );

+float32 uint32_to_float32( uint32 );

+float64 int32_to_float64( int32 );

+float64 uint32_to_float64( uint32 );

+#ifdef FLOATX80

+floatx80 int32_to_floatx80( int32 );

+floatx80 uint32_to_floatx80( uint32 );

+#endif

+#ifdef FLOAT128

+float128 int32_to_float128( int32 );

+float128 uint32_to_float128( uint32 );

+#endif

+#ifndef SOFTFLOAT_FOR_GCC /* __floatdi?f is in libgcc2.c */

+float32 int64_to_float32( long long );

+float64 int64_to_float64( long long );

+#ifdef FLOATX80

+floatx80 int64_to_floatx80( long long );

+#endif

+#ifdef FLOAT128

+float128 int64_to_float128( long long );

+#endif

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE single-precision conversion routines.

+-------------------------------------------------------------------------------

+*/

+int float32_to_int32( float32 );

+int float32_to_int32_round_to_zero( float32 );

+#if defined(SOFTFLOAT_FOR_GCC) && defined(SOFTFLOAT_NEED_FIXUNS)

+unsigned int float32_to_uint32_round_to_zero( float32 );

+#endif

+#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */

+long long float32_to_int64( float32 );

+long long float32_to_int64_round_to_zero( float32 );

+#endif

+float64 float32_to_float64( float32 );

+#ifdef FLOATX80

+floatx80 float32_to_floatx80( float32 );

+#endif

+#ifdef FLOAT128

+float128 float32_to_float128( float32 );

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE single-precision operations.

+-------------------------------------------------------------------------------

+*/

+float32 float32_round_to_int( float32 );

+float32 float32_add( float32, float32 );

+float32 float32_sub( float32, float32 );

+float32 float32_mul( float32, float32 );

+float32 float32_div( float32, float32 );

+float32 float32_rem( float32, float32 );

+float32 float32_sqrt( float32 );

+int float32_eq( float32, float32 );

+int float32_le( float32, float32 );

+int float32_lt( float32, float32 );

+int float32_eq_signaling( float32, float32 );

+int float32_le_quiet( float32, float32 );

+int float32_lt_quiet( float32, float32 );

+#ifndef SOFTFLOAT_FOR_GCC

+int float32_is_signaling_nan( float32 );

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE double-precision conversion routines.

+-------------------------------------------------------------------------------

+*/

+int float64_to_int32( float64 );

+int float64_to_int32_round_to_zero( float64 );

+#if defined(SOFTFLOAT_FOR_GCC) && defined(SOFTFLOAT_NEED_FIXUNS)

+unsigned int float64_to_uint32_round_to_zero( float64 );

+#endif

+#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */

+long long float64_to_int64( float64 );

+long long float64_to_int64_round_to_zero( float64 );

+#endif

+float32 float64_to_float32( float64 );

+#ifdef FLOATX80

+floatx80 float64_to_floatx80( float64 );

+#endif

+#ifdef FLOAT128

+float128 float64_to_float128( float64 );

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE double-precision operations.

+-------------------------------------------------------------------------------

+*/

+float64 float64_round_to_int( float64 );

+float64 float64_add( float64, float64 );

+float64 float64_sub( float64, float64 );

+float64 float64_mul( float64, float64 );

+float64 float64_div( float64, float64 );

+float64 float64_rem( float64, float64 );

+float64 float64_sqrt( float64 );

+int float64_eq( float64, float64 );

+int float64_le( float64, float64 );

+int float64_lt( float64, float64 );

+int float64_eq_signaling( float64, float64 );

+int float64_le_quiet( float64, float64 );

+int float64_lt_quiet( float64, float64 );

+#ifndef SOFTFLOAT_FOR_GCC

+int float64_is_signaling_nan( float64 );

+#endif

+

+#ifdef FLOATX80

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE extended double-precision conversion routines.

+-------------------------------------------------------------------------------

+*/

+int floatx80_to_int32( floatx80 );

+int floatx80_to_int32_round_to_zero( floatx80 );

+long long floatx80_to_int64( floatx80 );

+long long floatx80_to_int64_round_to_zero( floatx80 );

+float32 floatx80_to_float32( floatx80 );

+float64 floatx80_to_float64( floatx80 );

+#ifdef FLOAT128

+float128 floatx80_to_float128( floatx80 );

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE extended double-precision rounding precision.  Valid

+values are 32, 64, and 80.

+-------------------------------------------------------------------------------

+*/

+extern int floatx80_rounding_precision;

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE extended double-precision operations.

+-------------------------------------------------------------------------------

+*/

+floatx80 floatx80_round_to_int( floatx80 );

+floatx80 floatx80_add( floatx80, floatx80 );

+floatx80 floatx80_sub( floatx80, floatx80 );

+floatx80 floatx80_mul( floatx80, floatx80 );

+floatx80 floatx80_div( floatx80, floatx80 );

+floatx80 floatx80_rem( floatx80, floatx80 );

+floatx80 floatx80_sqrt( floatx80 );

+int floatx80_eq( floatx80, floatx80 );

+int floatx80_le( floatx80, floatx80 );

+int floatx80_lt( floatx80, floatx80 );

+int floatx80_eq_signaling( floatx80, floatx80 );

+int floatx80_le_quiet( floatx80, floatx80 );

+int floatx80_lt_quiet( floatx80, floatx80 );

+int floatx80_is_signaling_nan( floatx80 );

+

+#endif

+

+#ifdef FLOAT128

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE quadruple-precision conversion routines.

+-------------------------------------------------------------------------------

+*/

+int float128_to_int32( float128 );

+int float128_to_int32_round_to_zero( float128 );

+long long float128_to_int64( float128 );

+long long float128_to_int64_round_to_zero( float128 );

+float32 float128_to_float32( float128 );

+float64 float128_to_float64( float128 );

+#ifdef FLOATX80

+floatx80 float128_to_floatx80( float128 );

+#endif

+

+/*

+-------------------------------------------------------------------------------

+Software IEC/IEEE quadruple-precision operations.

+-------------------------------------------------------------------------------

+*/

+float128 float128_round_to_int( float128 );

+float128 float128_add( float128, float128 );

+float128 float128_sub( float128, float128 );

+float128 float128_mul( float128, float128 );

+float128 float128_div( float128, float128 );

+float128 float128_rem( float128, float128 );

+float128 float128_sqrt( float128 );

+int float128_eq( float128, float128 );

+int float128_le( float128, float128 );

+int float128_lt( float128, float128 );

+int float128_eq_signaling( float128, float128 );

+int float128_le_quiet( float128, float128 );

+int float128_lt_quiet( float128, float128 );

+int float128_is_signaling_nan( float128 );

+

+#endif