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Commit 3171aa2b authored by Piotr Caban's avatar Piotr Caban Committed by Alexandre Julliard
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msvcrt: Import lgamma implementation from musl.

Signed-off-by: 's avatarPiotr Caban <piotr@codeweavers.com> Signed-off-by: 's avatarAlexandre Julliard <julliard@winehq.org>
parent 7e6756d0
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Showing with 195 additions and 21 deletions
configure
View file @ 3171aa2b
......@@ -19620,7 +19620,6 @@ for ac_func in \
exp2 \
exp2f \
fmaf \
lgamma \
lgammaf \
tgamma \
tgammaf
......
configure.ac
View file @ 3171aa2b
......@@ -2659,7 +2659,6 @@ AC_CHECK_FUNCS(\
exp2 \
exp2f \
fmaf \
lgamma \
lgammaf \
tgamma \
tgammaf
......
dlls/msvcrt/math.c
View file @ 3171aa2b
......@@ -8644,12 +8644,206 @@ end:
return sx ? -x : x;
}
/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
static double sin_pi(double x)
{
static const double pi = 3.14159265358979311600e+00;
int n;
/* spurious inexact if odd int */
x = 2.0 * (x * 0.5 - floor(x * 0.5)); /* x mod 2.0 */
n = (int)(x * 4.0);
n = (n + 1) / 2;
x -= n * 0.5f;
x *= 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);
}
}
/*********************************************************************
* lgamma (MSVCR120.@)
*
* Copied from musl: src/math/lgamma_r.c
*/
double CDECL lgamma(double x)
{
return unix_funcs->lgamma( x );
static const double pi = 3.14159265358979311600e+00,
a0 = 7.72156649015328655494e-02,
a1 = 3.22467033424113591611e-01,
a2 = 6.73523010531292681824e-02,
a3 = 2.05808084325167332806e-02,
a4 = 7.38555086081402883957e-03,
a5 = 2.89051383673415629091e-03,
a6 = 1.19270763183362067845e-03,
a7 = 5.10069792153511336608e-04,
a8 = 2.20862790713908385557e-04,
a9 = 1.08011567247583939954e-04,
a10 = 2.52144565451257326939e-05,
a11 = 4.48640949618915160150e-05,
tc = 1.46163214496836224576e+00,
tf = -1.21486290535849611461e-01,
tt = -3.63867699703950536541e-18,
t0 = 4.83836122723810047042e-01,
t1 = -1.47587722994593911752e-01,
t2 = 6.46249402391333854778e-02,
t3 = -3.27885410759859649565e-02,
t4 = 1.79706750811820387126e-02,
t5 = -1.03142241298341437450e-02,
t6 = 6.10053870246291332635e-03,
t7 = -3.68452016781138256760e-03,
t8 = 2.25964780900612472250e-03,
t9 = -1.40346469989232843813e-03,
t10 = 8.81081882437654011382e-04,
t11 = -5.38595305356740546715e-04,
t12 = 3.15632070903625950361e-04,
t13 = -3.12754168375120860518e-04,
t14 = 3.35529192635519073543e-04,
u0 = -7.72156649015328655494e-02,
u1 = 6.32827064025093366517e-01,
u2 = 1.45492250137234768737e+00,
u3 = 9.77717527963372745603e-01,
u4 = 2.28963728064692451092e-01,
u5 = 1.33810918536787660377e-02,
v1 = 2.45597793713041134822e+00,
v2 = 2.12848976379893395361e+00,
v3 = 7.69285150456672783825e-01,
v4 = 1.04222645593369134254e-01,
v5 = 3.21709242282423911810e-03,
s0 = -7.72156649015328655494e-02,
s1 = 2.14982415960608852501e-01,
s2 = 3.25778796408930981787e-01,
s3 = 1.46350472652464452805e-01,
s4 = 2.66422703033638609560e-02,
s5 = 1.84028451407337715652e-03,
s6 = 3.19475326584100867617e-05,
r1 = 1.39200533467621045958e+00,
r2 = 7.21935547567138069525e-01,
r3 = 1.71933865632803078993e-01,
r4 = 1.86459191715652901344e-02,
r5 = 7.77942496381893596434e-04,
r6 = 7.32668430744625636189e-06,
w0 = 4.18938533204672725052e-01,
w1 = 8.33333333333329678849e-02,
w2 = -2.77777777728775536470e-03,
w3 = 7.93650558643019558500e-04,
w4 = -5.95187557450339963135e-04,
w5 = 8.36339918996282139126e-04,
w6 = -1.63092934096575273989e-03;
union {double f; UINT64 i;} u = {x};
double t, y, z, nadj, p, p1, p2, p3, q, r, w;
UINT32 ix;
int sign,i;
/* purge off +-inf, NaN, +-0, tiny and negative arguments */
sign = u.i >> 63;
ix = u.i >> 32 & 0x7fffffff;
if (ix >= 0x7ff00000)
return x * x;
if (ix < (0x3ff - 70) << 20) { /* |x|<2**-70, return -log(|x|) */
if(sign)
x = -x;
return -log(x);
}
if (sign) {
x = -x;
t = sin_pi(x);
if (t == 0.0) { /* -integer */
*_errno() = ERANGE;
return 1.0 / (x - x);
}
if (t <= 0.0)
t = -t;
nadj = log(pi / (t * x));
}
/* purge off 1 and 2 */
if ((ix == 0x3ff00000 || ix == 0x40000000) && (UINT32)u.i == 0)
r = 0;
/* for x < 2.0 */
else if (ix < 0x40000000) {
if (ix <= 0x3feccccc) { /* lgamma(x) = lgamma(x+1)-log(x) */
r = -log(x);
if (ix >= 0x3FE76944) {
y = 1.0 - x;
i = 0;
} else if (ix >= 0x3FCDA661) {
y = x - (tc - 1.0);
i = 1;
} else {
y = x;
i = 2;
}
} else {
r = 0.0;
if (ix >= 0x3FFBB4C3) { /* [1.7316,2] */
y = 2.0 - x;
i = 0;
} else if(ix >= 0x3FF3B4C4) { /* [1.23,1.73] */
y = x - tc;
i = 1;
} else {
y = x - 1.0;
i = 2;
}
}
switch (i) {
case 0:
z = y * y;
p1 = a0 + z * (a2 + z * (a4 + z * (a6 + z * (a8 + z * a10))));
p2 = z * (a1 + z * (a3 + z * (a5 + z * (a7 + z * (a9 + z * a11)))));
p = y * p1 + p2;
r += (p - 0.5 * y);
break;
case 1:
z = y * y;
w = z * y;
p1 = t0 + w * (t3 + w * (t6 + w * (t9 + w * t12))); /* parallel comp */
p2 = t1 + w * (t4 + w * (t7 + w * (t10 + w * t13)));
p3 = t2 + w * (t5 + w * (t8 + w * (t11 + w * t14)));
p = z * p1 - (tt - w * (p2 + y * p3));
r += tf + p;
break;
case 2:
p1 = y * (u0 + y * (u1 + y * (u2 + y * (u3 + y * (u4 + y * u5)))));
p2 = 1.0 + y * (v1 + y * (v2 + y * (v3 + y * (v4 + y * v5))));
r += -0.5 * y + p1 / p2;
}
} else if (ix < 0x40200000) { /* x < 8.0 */
i = (int)x;
y = x - (double)i;
p = y * (s0 + y * (s1 + y * (s2 + y * (s3 + y * (s4 + y * (s5 + y * s6))))));
q = 1.0 + y * (r1 + y * (r2 + y * (r3 + y * (r4 + y * (r5 + y * r6)))));
r = 0.5 * y + p / q;
z = 1.0; /* lgamma(1+s) = log(s) + lgamma(s) */
switch (i) {
case 7: z *= y + 6.0; /* fall through */
case 6: z *= y + 5.0; /* fall through */
case 5: z *= y + 4.0; /* fall through */
case 4: z *= y + 3.0; /* fall through */
case 3:
z *= y + 2.0;
r += log(z);
break;
}
} else if (ix < 0x43900000) { /* 8.0 <= x < 2**58 */
t = log(x);
z = 1.0 / x;
y = z * z;
w = w0 + z * (w1 + y * (w2 + y * (w3 + y * (w4 + y * (w5 + y * w6)))));
r = (x - 0.5) * (t - 1.0) + w;
} else /* 2**58 <= x <= inf */
r = x * (log(x) - 1.0);
if (sign)
r = nadj - r;
return r;
}
/*********************************************************************
......
dlls/msvcrt/unixlib.c
View file @ 3171aa2b
......@@ -95,19 +95,6 @@ static float CDECL unix_fmaf( float x, float y, float z )
}
/*********************************************************************
* lgamma
*/
static double CDECL unix_lgamma(double x)
{
#ifdef HAVE_LGAMMA
return lgamma(x);
#else
FIXME( "not implemented\n" );
return 0;
#endif
}
/*********************************************************************
* lgammaf
*/
static float CDECL unix_lgammaf(float x)
......@@ -169,7 +156,6 @@ static const struct unix_funcs funcs =
unix_exp2,
unix_exp2f,
unix_fmaf,
unix_lgamma,
unix_lgammaf,
unix_pow,
unix_powf,
......
dlls/msvcrt/unixlib.h
View file @ 3171aa2b
......@@ -28,7 +28,6 @@ struct unix_funcs
double (CDECL *exp2)(double x);
float (CDECL *exp2f)(float x);
float (CDECL *fmaf)(float x, float y, float z);
double (CDECL *lgamma)(double x);
float (CDECL *lgammaf)(float x);
double (CDECL *pow)(double x, double y);
float (CDECL *powf)(float x, float y);
......
include/config.h.in
View file @ 3171aa2b
......@@ -297,9 +297,6 @@
/* Define to 1 if you have the `ldap_parse_vlv_control' function. */
#undef HAVE_LDAP_PARSE_VLV_CONTROL
/* Define to 1 if you have the `lgamma' function. */
#undef HAVE_LGAMMA
/* Define to 1 if you have the `lgammaf' function. */
#undef HAVE_LGAMMAF
......
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