msvcrt: Import atanh implementation from musl.
Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -19616,7 +19616,6 @@ $as_echo "#define HAVE_ISNAN 1" >>confdefs.h
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fi
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for ac_func in \
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atanh \
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exp2 \
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exp2f \
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expm1 \
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@ -2656,7 +2656,6 @@ then
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fi
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AC_CHECK_FUNCS(\
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atanh \
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exp2 \
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exp2f \
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expm1 \
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@ -6668,21 +6668,38 @@ float CDECL acoshf(float x)
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/*********************************************************************
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* atanh (MSVCR120.@)
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*
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* Copied from musl: src/math/atanh.c
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*/
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double CDECL atanh(double x)
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{
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double ret;
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UINT64 ux = *(UINT64*)&x;
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int e = ux >> 52 & 0x7ff;
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int s = ux >> 63;
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if (x > 1 || x < -1) {
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/* |x| */
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ux &= (UINT64)-1 / 2;
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x = *(double*)&ux;
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if (x > 1) {
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*_errno() = EDOM;
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/* on Linux atanh returns -NAN in this case */
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feraiseexcept(FE_INVALID);
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return NAN;
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}
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ret = unix_funcs->atanh( x );
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if (!isfinite(ret)) *_errno() = ERANGE;
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return ret;
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if (e < 0x3ff - 1) {
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if (e < 0x3ff - 32) {
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fp_barrier(x + 0x1p120f);
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if (e == 0) /* handle underflow */
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fp_barrier(x * x);
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} else { /* |x| < 0.5, up to 1.7ulp error */
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x = 0.5 * log1p(2 * x + 2 * x * x / (1 - x));
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}
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} else { /* avoid overflow */
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x = 0.5 * log1p(2 * (x / (1 - x)));
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if (isinf(x)) *_errno() = ERANGE;
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}
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return s ? -x : x;
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}
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/*********************************************************************
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@ -42,19 +42,6 @@
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WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
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/*********************************************************************
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* atanh
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*/
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static double CDECL unix_atanh(double x)
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{
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#ifdef HAVE_ATANH
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return atanh(x);
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#else
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if (-1e-6 < x && x < 1e-6) return x + x*x*x/3;
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else return (log(1+x) - log(1-x)) / 2;
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#endif
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}
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/*********************************************************************
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* cosh
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*/
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@ -381,7 +368,6 @@ static float CDECL unix_tgammaf(float x)
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static const struct unix_funcs funcs =
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{
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unix_atanh,
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unix_cosh,
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unix_coshf,
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unix_exp,
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@ -23,7 +23,6 @@
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struct unix_funcs
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{
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double (CDECL *atanh)(double x);
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double (CDECL *cosh)(double x);
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float (CDECL *coshf)(float x);
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double (CDECL *exp)(double x);
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@ -31,9 +31,6 @@
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/* Define to 1 if you have the <asm/user.h> header file. */
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#undef HAVE_ASM_USER_H
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/* Define to 1 if you have the `atanh' function. */
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#undef HAVE_ATANH
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/* Define to 1 if you have the <AudioToolbox/AudioConverter.h> header file. */
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#undef HAVE_AUDIOTOOLBOX_AUDIOCONVERTER_H
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