msvcrt: Import lgammaf 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
Alexandre Julliard
parent
3171aa2b2d
commit
b634fa7ca7
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@ -19620,7 +19620,6 @@ for ac_func in \
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exp2 \
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exp2f \
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fmaf \
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lgammaf \
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tgamma \
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tgammaf
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@ -2659,7 +2659,6 @@ AC_CHECK_FUNCS(\
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exp2 \
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exp2f \
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fmaf \
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lgammaf \
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tgamma \
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tgammaf
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)
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@ -636,6 +636,38 @@ static float __expm1f(float x)
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y = (x - (e + u.f) + 1) * twopk;
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return y;
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}
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/* Copied from musl: src/math/__sindf.c */
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static float __sindf(double x)
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{
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static const double S1 = -0x15555554cbac77.0p-55,
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S2 = 0x111110896efbb2.0p-59,
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S3 = -0x1a00f9e2cae774.0p-65,
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S4 = 0x16cd878c3b46a7.0p-71;
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double r, s, w, z;
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z = x * x;
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w = z * z;
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r = S3 + z * S4;
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s = z * x;
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return (x + s * (S1 + z * S2)) + s * w * r;
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}
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/* Copied from musl: src/math/__cosdf.c */
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static float __cosdf(double x)
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{
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static const double C0 = -0x1ffffffd0c5e81.0p-54,
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C1 = 0x155553e1053a42.0p-57,
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C2 = -0x16c087e80f1e27.0p-62,
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C3 = 0x199342e0ee5069.0p-68;
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double r, w, z;
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z = x * x;
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w = z * z;
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r = C2 + z * C3;
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return ((1.0 + z * C0) + w * C1) + (w * z) * r;
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}
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#endif
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#ifndef __i386__
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@ -987,38 +1019,6 @@ static int __rem_pio2f(float x, double *y)
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return n;
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}
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/* Copied from musl: src/math/__sindf.c */
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static float __sindf(double x)
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{
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static const double S1 = -0x15555554cbac77.0p-55,
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S2 = 0x111110896efbb2.0p-59,
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S3 = -0x1a00f9e2cae774.0p-65,
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S4 = 0x16cd878c3b46a7.0p-71;
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double r, s, w, z;
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z = x * x;
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w = z * z;
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r = S3 + z * S4;
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s = z * x;
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return (x + s * (S1 + z * S2)) + s * w * r;
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}
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/* Copied from musl: src/math/__cosdf.c */
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static float __cosdf(double x)
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{
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static const double C0 = -0x1ffffffd0c5e81.0p-54,
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C1 = 0x155553e1053a42.0p-57,
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C2 = -0x16c087e80f1e27.0p-62,
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C3 = 0x199342e0ee5069.0p-68;
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double r, w, z;
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z = x * x;
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w = z * z;
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r = C2 + z * C3;
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return ((1.0 + z * C0) + w * C1) + (w * z) * r;
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}
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/*********************************************************************
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* cosf (MSVCRT.@)
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*
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@ -8846,12 +8846,205 @@ double CDECL lgamma(double x)
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return r;
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}
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/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
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static float sinf_pi(float x)
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{
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double y;
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int n;
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/* spurious inexact if odd int */
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x = 2 * (x * 0.5f - floorf(x * 0.5f)); /* x mod 2.0 */
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n = (int)(x * 4);
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n = (n + 1) / 2;
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y = x - n * 0.5f;
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y *= M_PI;
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switch (n) {
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default: /* case 4: */
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case 0: return __sindf(y);
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case 1: return __cosdf(y);
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case 2: return __sindf(-y);
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case 3: return -__cosdf(y);
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}
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}
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/*********************************************************************
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* lgammaf (MSVCR120.@)
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*
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* Copied from musl: src/math/lgammaf_r.c
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*/
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float CDECL lgammaf(float x)
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{
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return unix_funcs->lgammaf( x );
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static const float pi = 3.1415927410e+00,
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a0 = 7.7215664089e-02,
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a1 = 3.2246702909e-01,
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a2 = 6.7352302372e-02,
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a3 = 2.0580807701e-02,
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a4 = 7.3855509982e-03,
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a5 = 2.8905137442e-03,
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a6 = 1.1927076848e-03,
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a7 = 5.1006977446e-04,
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a8 = 2.2086278477e-04,
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a9 = 1.0801156895e-04,
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a10 = 2.5214456400e-05,
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a11 = 4.4864096708e-05,
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tc = 1.4616321325e+00,
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tf = -1.2148628384e-01,
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tt = 6.6971006518e-09,
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t0 = 4.8383611441e-01,
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t1 = -1.4758771658e-01,
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t2 = 6.4624942839e-02,
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t3 = -3.2788541168e-02,
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t4 = 1.7970675603e-02,
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t5 = -1.0314224288e-02,
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t6 = 6.1005386524e-03,
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t7 = -3.6845202558e-03,
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t8 = 2.2596477065e-03,
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t9 = -1.4034647029e-03,
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t10 = 8.8108185446e-04,
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t11 = -5.3859531181e-04,
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t12 = 3.1563205994e-04,
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t13 = -3.1275415677e-04,
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t14 = 3.3552918467e-04,
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u0 = -7.7215664089e-02,
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u1 = 6.3282704353e-01,
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u2 = 1.4549225569e+00,
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u3 = 9.7771751881e-01,
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u4 = 2.2896373272e-01,
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u5 = 1.3381091878e-02,
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v1 = 2.4559779167e+00,
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v2 = 2.1284897327e+00,
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v3 = 7.6928514242e-01,
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v4 = 1.0422264785e-01,
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v5 = 3.2170924824e-03,
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s0 = -7.7215664089e-02,
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s1 = 2.1498242021e-01,
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s2 = 3.2577878237e-01,
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s3 = 1.4635047317e-01,
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s4 = 2.6642270386e-02,
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s5 = 1.8402845599e-03,
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s6 = 3.1947532989e-05,
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r1 = 1.3920053244e+00,
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r2 = 7.2193557024e-01,
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r3 = 1.7193385959e-01,
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r4 = 1.8645919859e-02,
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r5 = 7.7794247773e-04,
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r6 = 7.3266842264e-06,
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w0 = 4.1893854737e-01,
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w1 = 8.3333335817e-02,
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w2 = -2.7777778450e-03,
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w3 = 7.9365057172e-04,
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w4 = -5.9518753551e-04,
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w5 = 8.3633989561e-04,
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w6 = -1.6309292987e-03;
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union {float f; UINT32 i;} u = {x};
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float t, y, z, nadj, p, p1, p2, p3, q, r, w;
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UINT32 ix;
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int i, sign;
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/* purge off +-inf, NaN, +-0, tiny and negative arguments */
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sign = u.i >> 31;
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ix = u.i & 0x7fffffff;
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if (ix >= 0x7f800000)
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return x * x;
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if (ix < 0x35000000) { /* |x| < 2**-21, return -log(|x|) */
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if (sign)
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x = -x;
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return -logf(x);
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}
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if (sign) {
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x = -x;
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t = sinf_pi(x);
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if (t == 0.0f) { /* -integer */
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*_errno() = ERANGE;
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return 1.0f / (x - x);
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}
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if (t <= 0.0f)
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t = -t;
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nadj = logf(pi / (t * x));
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}
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/* purge off 1 and 2 */
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if (ix == 0x3f800000 || ix == 0x40000000)
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r = 0;
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/* for x < 2.0 */
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else if (ix < 0x40000000) {
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if (ix <= 0x3f666666) { /* lgamma(x) = lgamma(x+1)-log(x) */
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r = -logf(x);
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if (ix >= 0x3f3b4a20) {
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y = 1.0f - x;
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i = 0;
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} else if (ix >= 0x3e6d3308) {
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y = x - (tc - 1.0f);
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i = 1;
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} else {
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y = x;
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i = 2;
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}
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} else {
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r = 0.0f;
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if (ix >= 0x3fdda618) { /* [1.7316,2] */
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y = 2.0f - x;
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i = 0;
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} else if (ix >= 0x3F9da620) { /* [1.23,1.73] */
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y = x - tc;
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i = 1;
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} else {
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y = x - 1.0f;
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i = 2;
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}
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}
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switch(i) {
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case 0:
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z = y * y;
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p1 = a0 + z * (a2 + z * (a4 + z * (a6 + z * (a8 + z * a10))));
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p2 = z * (a1 + z * (a3 + z * (a5 + z * (a7 + z * (a9 + z * a11)))));
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p = y * p1 + p2;
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r += p - 0.5f * y;
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break;
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case 1:
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z = y * y;
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w = z * y;
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p1 = t0 + w * (t3 + w * (t6 + w * (t9 + w * t12))); /* parallel comp */
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p2 = t1 + w * (t4 + w * (t7 + w * (t10 + w * t13)));
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p3 = t2 + w * (t5 + w * (t8 + w * (t11 + w * t14)));
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p = z * p1 - (tt - w * (p2 + y * p3));
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r += (tf + p);
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break;
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case 2:
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p1 = y * (u0 + y * (u1 + y * (u2 + y * (u3 + y * (u4 + y * u5)))));
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p2 = 1.0f + y * (v1 + y * (v2 + y * (v3 + y * (v4 + y * v5))));
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r += -0.5f * y + p1 / p2;
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}
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} else if (ix < 0x41000000) { /* x < 8.0 */
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i = (int)x;
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y = x - (float)i;
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p = y * (s0 + y * (s1 + y * (s2 + y * (s3 + y * (s4 + y * (s5 + y * s6))))));
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q = 1.0f + y * (r1 + y * (r2 + y * (r3 + y * (r4 + y * (r5 + y * r6)))));
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r = 0.5f * y + p / q;
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z = 1.0f; /* lgamma(1+s) = log(s) + lgamma(s) */
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switch (i) {
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case 7: z *= y + 6.0f; /* fall through */
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case 6: z *= y + 5.0f; /* fall through */
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case 5: z *= y + 4.0f; /* fall through */
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case 4: z *= y + 3.0f; /* fall through */
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case 3:
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z *= y + 2.0f;
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r += logf(z);
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break;
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}
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} else if (ix < 0x5c800000) { /* 8.0 <= x < 2**58 */
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t = logf(x);
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z = 1.0f / x;
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y = z * z;
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w = w0 + z * (w1 + y * (w2 + y * (w3 + y * (w4 + y * (w5 + y * w6)))));
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r = (x - 0.5f) * (t - 1.0f) + w;
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} else /* 2**58 <= x <= inf */
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r = x * (logf(x) - 1.0f);
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if (sign)
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r = nadj - r;
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return r;
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}
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/*********************************************************************
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@ -94,19 +94,6 @@ static float CDECL unix_fmaf( float x, float y, float z )
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#endif
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}
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/*********************************************************************
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* lgammaf
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*/
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static float CDECL unix_lgammaf(float x)
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{
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#ifdef HAVE_LGAMMAF
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return lgammaf(x);
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#else
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FIXME( "not implemented\n" );
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return 0;
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#endif
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}
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/*********************************************************************
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* pow
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*/
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@ -156,7 +143,6 @@ static const struct unix_funcs funcs =
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unix_exp2,
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unix_exp2f,
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unix_fmaf,
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unix_lgammaf,
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unix_pow,
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unix_powf,
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unix_tgamma,
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@ -28,7 +28,6 @@ struct unix_funcs
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double (CDECL *exp2)(double x);
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float (CDECL *exp2f)(float x);
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float (CDECL *fmaf)(float x, float y, float z);
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float (CDECL *lgammaf)(float x);
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double (CDECL *pow)(double x, double y);
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float (CDECL *powf)(float x, float y);
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double (CDECL *tgamma)(double x);
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@ -297,9 +297,6 @@
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/* Define to 1 if you have the `ldap_parse_vlv_control' function. */
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#undef HAVE_LDAP_PARSE_VLV_CONTROL
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/* Define to 1 if you have the `lgammaf' function. */
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#undef HAVE_LGAMMAF
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/* Define to 1 if you have the `gettextpo' library (-lgettextpo). */
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#undef HAVE_LIBGETTEXTPO
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