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>
39 lines
810 B
C
39 lines
810 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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#include <limits.h>
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#include <errno.h>
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long long
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llroundl (long double x)
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{
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long double res;
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if (x >= 0.0L)
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{
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res = ceill (x);
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if (res - x > 0.5L)
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res -= 1.0L;
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}
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else
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{
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res = ceill (-x);
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if (res + x > 0.5L)
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res -= 1.0L;
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res = -res;
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}
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if (!isfinite (res)
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|| res > (double) LLONG_MAX
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|| res < (double) LLONG_MIN)
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{
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errno = ERANGE;
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/* Undefined behaviour, so we could return anything. */
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/* return res > 0.0 ? LLONG_MAX : LLONG_MIN; */
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}
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return (long long) res;
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}
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