mirror of
git://source.winehq.org/git/wine.git
synced 2024-09-02 01:33:37 +00:00
msvcrt: Use the tgamma()/tgammaf() implementation from the bundled musl library.
This commit is contained in:
parent
442052fe18
commit
dae30bd66d
|
@ -8996,161 +8996,6 @@ float CDECL remainderf(float x, float y)
|
|||
return remquof(x, y, &q);
|
||||
}
|
||||
|
||||
/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
|
||||
static double sin_pi(double x)
|
||||
{
|
||||
int n;
|
||||
|
||||
/* spurious inexact if odd int */
|
||||
x = 2.0 * (x * 0.5 - floor(x * 0.5)); /* x mod 2.0 */
|
||||
|
||||
n = x * 4.0;
|
||||
n = (n + 1) / 2;
|
||||
x -= n * 0.5f;
|
||||
x *= M_PI;
|
||||
|
||||
switch (n) {
|
||||
default: /* case 4: */
|
||||
case 0: return __sin(x, 0.0, 0);
|
||||
case 1: return __cos(x, 0.0);
|
||||
case 2: return __sin(-x, 0.0, 0);
|
||||
case 3: return -__cos(x, 0.0);
|
||||
}
|
||||
}
|
||||
|
||||
static double tgamma_S(double x)
|
||||
{
|
||||
static const double Snum[] = {
|
||||
23531376880.410759688572007674451636754734846804940,
|
||||
42919803642.649098768957899047001988850926355848959,
|
||||
35711959237.355668049440185451547166705960488635843,
|
||||
17921034426.037209699919755754458931112671403265390,
|
||||
6039542586.3520280050642916443072979210699388420708,
|
||||
1439720407.3117216736632230727949123939715485786772,
|
||||
248874557.86205415651146038641322942321632125127801,
|
||||
31426415.585400194380614231628318205362874684987640,
|
||||
2876370.6289353724412254090516208496135991145378768,
|
||||
186056.26539522349504029498971604569928220784236328,
|
||||
8071.6720023658162106380029022722506138218516325024,
|
||||
210.82427775157934587250973392071336271166969580291,
|
||||
2.5066282746310002701649081771338373386264310793408,
|
||||
};
|
||||
static const double Sden[] = {
|
||||
0, 39916800, 120543840, 150917976, 105258076, 45995730, 13339535,
|
||||
2637558, 357423, 32670, 1925, 66, 1,
|
||||
};
|
||||
|
||||
double num = 0, den = 0;
|
||||
int i;
|
||||
|
||||
/* to avoid overflow handle large x differently */
|
||||
if (x < 8)
|
||||
for (i = ARRAY_SIZE(Snum) - 1; i >= 0; i--) {
|
||||
num = num * x + Snum[i];
|
||||
den = den * x + Sden[i];
|
||||
}
|
||||
else
|
||||
for (i = 0; i < ARRAY_SIZE(Snum); i++) {
|
||||
num = num / x + Snum[i];
|
||||
den = den / x + Sden[i];
|
||||
}
|
||||
return num / den;
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* tgamma (MSVCR120.@)
|
||||
*
|
||||
* Copied from musl: src/math/tgamma.c
|
||||
*/
|
||||
double CDECL tgamma(double x)
|
||||
{
|
||||
static const double gmhalf = 5.524680040776729583740234375;
|
||||
static const double fact[] = {
|
||||
1, 1, 2, 6, 24, 120, 720, 5040.0, 40320.0, 362880.0, 3628800.0, 39916800.0,
|
||||
479001600.0, 6227020800.0, 87178291200.0, 1307674368000.0, 20922789888000.0,
|
||||
355687428096000.0, 6402373705728000.0, 121645100408832000.0,
|
||||
2432902008176640000.0, 51090942171709440000.0, 1124000727777607680000.0,
|
||||
};
|
||||
|
||||
union {double f; UINT64 i;} u = {x};
|
||||
double absx, y, dy, z, r;
|
||||
UINT32 ix = u.i >> 32 & 0x7fffffff;
|
||||
int sign = u.i >> 63;
|
||||
|
||||
/* special cases */
|
||||
if (ix >= 0x7ff00000) {
|
||||
/* tgamma(nan)=nan, tgamma(inf)=inf, tgamma(-inf)=nan with invalid */
|
||||
if (u.i == 0xfff0000000000000ULL)
|
||||
*_errno() = EDOM;
|
||||
return x + INFINITY;
|
||||
}
|
||||
if (ix < (0x3ff - 54) << 20) {
|
||||
/* |x| < 2^-54: tgamma(x) ~ 1/x, +-0 raises div-by-zero */
|
||||
if (x == 0.0)
|
||||
*_errno() = ERANGE;
|
||||
return 1 / x;
|
||||
}
|
||||
|
||||
/* integer arguments */
|
||||
/* raise inexact when non-integer */
|
||||
if (x == floor(x)) {
|
||||
if (sign) {
|
||||
*_errno() = EDOM;
|
||||
return 0 / (x - x);
|
||||
}
|
||||
if (x <= ARRAY_SIZE(fact))
|
||||
return fact[(int)x - 1];
|
||||
}
|
||||
|
||||
/* x >= 172: tgamma(x)=inf with overflow */
|
||||
/* x =< -184: tgamma(x)=+-0 with underflow */
|
||||
if (ix >= 0x40670000) { /* |x| >= 184 */
|
||||
*_errno() = ERANGE;
|
||||
if (sign) {
|
||||
fp_barrierf(0x1p-126 / x);
|
||||
return 0;
|
||||
}
|
||||
x *= 0x1p1023;
|
||||
return x;
|
||||
}
|
||||
|
||||
absx = sign ? -x : x;
|
||||
|
||||
/* handle the error of x + g - 0.5 */
|
||||
y = absx + gmhalf;
|
||||
if (absx > gmhalf) {
|
||||
dy = y - absx;
|
||||
dy -= gmhalf;
|
||||
} else {
|
||||
dy = y - gmhalf;
|
||||
dy -= absx;
|
||||
}
|
||||
|
||||
z = absx - 0.5;
|
||||
r = tgamma_S(absx) * exp(-y);
|
||||
if (x < 0) {
|
||||
/* reflection formula for negative x */
|
||||
/* sinpi(absx) is not 0, integers are already handled */
|
||||
r = -M_PI / (sin_pi(absx) * absx * r);
|
||||
dy = -dy;
|
||||
z = -z;
|
||||
}
|
||||
r += dy * (gmhalf + 0.5) * r / y;
|
||||
z = pow(y, 0.5 * z);
|
||||
y = r * z * z;
|
||||
return y;
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* tgammaf (MSVCR120.@)
|
||||
*
|
||||
* Copied from musl: src/math/tgammaf.c
|
||||
*/
|
||||
float CDECL tgammaf(float x)
|
||||
{
|
||||
return tgamma(x);
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* _except1 (MSVCR120.@)
|
||||
* TODO:
|
||||
|
|
|
@ -114,18 +114,24 @@ double __cdecl tgamma(double x)
|
|||
int sign = u.i>>63;
|
||||
|
||||
/* special cases */
|
||||
if (ix >= 0x7ff00000)
|
||||
if (ix >= 0x7ff00000) {
|
||||
/* tgamma(nan)=nan, tgamma(inf)=inf, tgamma(-inf)=nan with invalid */
|
||||
if (u.i == 0xfff0000000000000ULL) errno = EDOM;
|
||||
return x + INFINITY;
|
||||
if (ix < (0x3ff-54)<<20)
|
||||
}
|
||||
if (ix < (0x3ff-54)<<20) {
|
||||
/* |x| < 2^-54: tgamma(x) ~ 1/x, +-0 raises div-by-zero */
|
||||
if (x == 0.0) errno = ERANGE;
|
||||
return 1/x;
|
||||
}
|
||||
|
||||
/* integer arguments */
|
||||
/* raise inexact when non-integer */
|
||||
if (x == floor(x)) {
|
||||
if (sign)
|
||||
if (sign) {
|
||||
errno = EDOM;
|
||||
return 0/0.0;
|
||||
}
|
||||
if (x <= sizeof fact/sizeof *fact)
|
||||
return fact[(int)x - 1];
|
||||
}
|
||||
|
@ -133,6 +139,7 @@ double __cdecl tgamma(double x)
|
|||
/* x >= 172: tgamma(x)=inf with overflow */
|
||||
/* x =< -184: tgamma(x)=+-0 with underflow */
|
||||
if (ix >= 0x40670000) { /* |x| >= 184 */
|
||||
errno = ERANGE;
|
||||
if (sign) {
|
||||
FORCE_EVAL((float)(0x1p-126/x));
|
||||
if (floor(x) * 0.5 == floor(x * 0.5))
|
||||
|
|
Loading…
Reference in a new issue