792e51b721
This patch adds the long double functions missing in newlib to Cygwin.
Apart from some self-written additions (exp10l, finite{f,l}, isinf{f,l},
isnan{f,l}, pow10l) the files are taken from the Mingw-w64 math lib.
Minor changes were required, e.g. substitue _WIN64 with __x86_64__ and
fixing __FLT_RPT_DOMAIN/__FLT_RPT_ERANGE for Cygwin.
Cygwin:
* math: New subdir with math functions.
* Makefile.in (VPATH): Add math subdir.
(MATH_OFILES): List of object files collected from building files in
math subdir.
(DLL_OFILES): Add $(MATH_OFILES).
${CURDIR}/libm.a: Add $(MATH_OFILES) to build.
* common.din: Add new functions from math subdir.
* i686.din: Align to new math subdir. Remove functions now commonly
available.
* x86_64.din: Ditto.
* math.h: math.h wrapper to define mingw structs used in some files in
math subdir.
* include/cygwin/version.h: Bump API minor version.
newlib:
* libc/include/complex.h: Add prototypes for complex long double
functions. Only define for Cygwin.
* libc/include/math.h: Additionally enable prototypes of long double
functions for Cygwin. Add Cygwin-only prototypes for dreml, sincosl,
exp10l and pow10l. Explain why we don't add them to newlib.
* libc/include/tgmath.h: Enable long double handling on Cygwin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#ifndef _MINGWEX_FASTMATH_H_
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#define _MINGWEX_FASTMATH_H_
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/* Fast math inlines
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No range or domain checks. No setting of errno. No tweaks to
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protect precision near range limits. */
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/* For now this is an internal header with just the functions that
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are currently used in building libmingwex.a math components */
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/* FIXME: We really should get rid of the code duplication using euther
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C++ templates or tgmath-type macros. */
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static __inline__ double __fast_sqrt (double x)
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{
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double res;
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asm __volatile__ ("fsqrt" : "=t" (res) : "0" (x));
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return res;
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}
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static __inline__ long double __fast_sqrtl (long double x)
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{
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long double res;
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asm __volatile__ ("fsqrt" : "=t" (res) : "0" (x));
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return res;
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}
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static __inline__ float __fast_sqrtf (float x)
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{
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float res;
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asm __volatile__ ("fsqrt" : "=t" (res) : "0" (x));
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return res;
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}
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static __inline__ double __fast_log (double x)
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{
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double res;
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2x"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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static __inline__ long double __fast_logl (long double x)
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{
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long double res;
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2x"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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static __inline__ float __fast_logf (float x)
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{
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float res;
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2x"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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static __inline__ double __fast_log1p (double x)
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{
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double res;
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/* fyl2xp1 accurate only for |x| <= 1.0 - 0.5 * sqrt (2.0) */
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if (fabs (x) >= 1.0 - 0.5 * 1.41421356237309504880)
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res = __fast_log (1.0 + x);
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else
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2xp1"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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static __inline__ long double __fast_log1pl (long double x)
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{
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long double res;
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/* fyl2xp1 accurate only for |x| <= 1.0 - 0.5 * sqrt (2.0) */
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if (fabsl (x) >= 1.0L - 0.5L * 1.41421356237309504880L)
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res = __fast_logl (1.0L + x);
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else
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2xp1"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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static __inline__ float __fast_log1pf (float x)
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{
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float res;
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/* fyl2xp1 accurate only for |x| <= 1.0 - 0.5 * sqrt (2.0) */
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if (fabsf (x) >= 1.0 - 0.5 * 1.41421356237309504880)
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res = __fast_logf (1.0 + x);
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else
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asm __volatile__
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("fldln2\n\t"
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"fxch\n\t"
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"fyl2xp1"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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#endif
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