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>
30 lines
924 B
C
30 lines
924 B
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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#include <math.h>
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#if defined(__arm__) || defined(_ARM_)
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/* This works around a compiler bug */
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double __rint_internal( double x );
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asm(".def __rint_internal; .scl 2; .type 32; .endef\n"
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"\t.text\n"
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"\t.align 4\n"
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"\t.globl __rint_internal\n"
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"__rint_internal:\n"
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"\tvcvtr.s32.f64 s0, d0\n"
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"\tvcvt.f64.s32 d0, s0\n"
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"\tbx lr");
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#endif /* defined(__arm__) || defined(_ARM_) */
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double rint (double x) {
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double retval = 0.0;
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#if defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__)
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__asm__ __volatile__ ("frndint;" : "=t" (retval) : "0" (x));
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#elif defined(__arm__) || defined(_ARM_)
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retval = __rint_internal(x);
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#endif
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return retval;
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}
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