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msvcrt: Use the atanf() implementation from the bundled musl library.

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This commit is contained in:
Alexandre Julliard 2023-04-07 14:44:04 +02:00
parent 472d7ec76d
commit e525730cc1
2 changed files with 5 additions and 78 deletions
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81
dlls/msvcrt/math.c
View file

@ -292,87 +292,14 @@ int CDECL _isnanf( float num )
/*********************************************************************
* atanf (MSVCRT.@)
*
* Copied from musl: src/math/atanf.c
*/
float CDECL atanf( float x )
#if _MSVCR_VER == 0 /* other versions call atanf() directly */
float CDECL MSVCRT_atanf( float x )
{
static const float atanhi[] = {
4.6364760399e-01,
7.8539812565e-01,
9.8279368877e-01,
1.5707962513e+00,
};
static const float atanlo[] = {
5.0121582440e-09,
3.7748947079e-08,
3.4473217170e-08,
7.5497894159e-08,
};
static const float aT[] = {
3.3333328366e-01,
-1.9999158382e-01,
1.4253635705e-01,
-1.0648017377e-01,
6.1687607318e-02,
};
float w, s1, s2, z;
unsigned int ix, sign;
int id;
#if _MSVCR_VER == 0
if (isnan(x)) return math_error(_DOMAIN, "atanf", x, 0, x);
#endif
ix = *(unsigned int*)&x;
sign = ix >> 31;
ix &= 0x7fffffff;
if (ix >= 0x4c800000) { /* if |x| >= 2**26 */
if (isnan(x))
return x;
z = atanhi[3] + 7.5231638453e-37;
return sign ? -z : z;
}
if (ix < 0x3ee00000) { /* |x| < 0.4375 */
if (ix < 0x39800000) { /* |x| < 2**-12 */
if (ix < 0x00800000)
/* raise underflow for subnormal x */
fp_barrierf(x*x);
return x;
}
id = -1;
} else {
x = fabsf(x);
if (ix < 0x3f980000) { /* |x| < 1.1875 */
if (ix < 0x3f300000) { /* 7/16 <= |x| < 11/16 */
id = 0;
x = (2.0f * x - 1.0f) / (2.0f + x);
} else { /* 11/16 <= |x| < 19/16 */
id = 1;
x = (x - 1.0f) / (x + 1.0f);
}
} else {
if (ix < 0x401c0000) { /* |x| < 2.4375 */
id = 2;
x = (x - 1.5f) / (1.0f + 1.5f * x);
} else { /* 2.4375 <= |x| < 2**26 */
id = 3;
x = -1.0f / x;
}
}
}
/* end of argument reduction */
z = x * x;
w = z * z;
/* break sum from i=0 to 10 aT[i]z**(i+1) into odd and even poly */
s1 = z * (aT[0] + w * (aT[2] + w * aT[4]));
s2 = w * (aT[1] + w * aT[3]);
if (id < 0)
return x - x * (s1 + s2);
z = atanhi[id] - ((x * (s1 + s2) - atanlo[id]) - x);
return sign ? -z : z;
return atanf( x );
}
#endif
static BOOL sqrtf_validate( float *x )
{

2
dlls/msvcrt/msvcrt.spec
View file

@ -1257,7 +1257,7 @@
@ cdecl atan(double)
@ cdecl atan2(double double)
@ cdecl -arch=!i386 asinf(float)
@ cdecl -arch=!i386 atanf(float)
@ cdecl -arch=!i386 atanf(float) MSVCRT_atanf
@ cdecl -arch=!i386 atan2f(float float)
@ cdecl -private atexit(ptr) MSVCRT_atexit # not imported to avoid conflicts with Mingw
@ cdecl atof(str)