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msvcrt: Import atanh implementation from musl. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2021-05-25 15:21:24 +02:00 committed by Alexandre Julliard
parent ed49a95d1e
commit ff033db60b
6 changed files with 23 additions and 26 deletions
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1
configure vendored
View File

@ -19616,7 +19616,6 @@ $as_echo "#define HAVE_ISNAN 1" >>confdefs.h
fi
for ac_func in \
atanh \
exp2 \
exp2f \
expm1 \

1
configure.ac
View File

@ -2656,7 +2656,6 @@ then
fi
AC_CHECK_FUNCS(\
atanh \
exp2 \
exp2f \
expm1 \

29
dlls/msvcrt/math.c
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@ -6668,21 +6668,38 @@ float CDECL acoshf(float x)
/*********************************************************************
* atanh (MSVCR120.@)
*
* Copied from musl: src/math/atanh.c
*/
double CDECL atanh(double x)
{
double ret;
UINT64 ux = *(UINT64*)&x;
int e = ux >> 52 & 0x7ff;
int s = ux >> 63;
if (x > 1 || x < -1) {
/* |x| */
ux &= (UINT64)-1 / 2;
x = *(double*)&ux;
if (x > 1) {
*_errno() = EDOM;
/* on Linux atanh returns -NAN in this case */
feraiseexcept(FE_INVALID);
return NAN;
}
ret = unix_funcs->atanh( x );
if (!isfinite(ret)) *_errno() = ERANGE;
return ret;
if (e < 0x3ff - 1) {
if (e < 0x3ff - 32) {
fp_barrier(x + 0x1p120f);
if (e == 0) /* handle underflow */
fp_barrier(x * x);
} else { /* |x| < 0.5, up to 1.7ulp error */
x = 0.5 * log1p(2 * x + 2 * x * x / (1 - x));
}
} else { /* avoid overflow */
x = 0.5 * log1p(2 * (x / (1 - x)));
if (isinf(x)) *_errno() = ERANGE;
}
return s ? -x : x;
}
/*********************************************************************

14
dlls/msvcrt/unixlib.c
View File

@ -42,19 +42,6 @@
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
/*********************************************************************
* atanh
*/
static double CDECL unix_atanh(double x)
{
#ifdef HAVE_ATANH
return atanh(x);
#else
if (-1e-6 < x && x < 1e-6) return x + x*x*x/3;
else return (log(1+x) - log(1-x)) / 2;
#endif
}
/*********************************************************************
* cosh
*/
@ -381,7 +368,6 @@ static float CDECL unix_tgammaf(float x)
static const struct unix_funcs funcs =
{
unix_atanh,
unix_cosh,
unix_coshf,
unix_exp,

1
dlls/msvcrt/unixlib.h
View File

@ -23,7 +23,6 @@
struct unix_funcs
{
double (CDECL *atanh)(double x);
double (CDECL *cosh)(double x);
float (CDECL *coshf)(float x);
double (CDECL *exp)(double x);

3
include/config.h.in
View File

@ -31,9 +31,6 @@
/* Define to 1 if you have the <asm/user.h> header file. */
#undef HAVE_ASM_USER_H
/* Define to 1 if you have the `atanh' function. */
#undef HAVE_ATANH
/* Define to 1 if you have the <AudioToolbox/AudioConverter.h> header file. */
#undef HAVE_AUDIOTOOLBOX_AUDIOCONVERTER_H