diff options
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/lgammaf_r.c')
| -rw-r--r-- | lib/mlibc/options/ansi/musl-generic-math/lgammaf_r.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/lgammaf_r.c b/lib/mlibc/options/ansi/musl-generic-math/lgammaf_r.c deleted file mode 100644 index f73e89d..0000000 --- a/lib/mlibc/options/ansi/musl-generic-math/lgammaf_r.c +++ /dev/null @@ -1,220 +0,0 @@ -/* origin: FreeBSD /usr/src/lib/msun/src/e_lgammaf_r.c */ -/* - * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. - */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -#include "libm.h" -#include "weak_alias.h" -//#include "libc.h" - -static const float -pi = 3.1415927410e+00, /* 0x40490fdb */ -a0 = 7.7215664089e-02, /* 0x3d9e233f */ -a1 = 3.2246702909e-01, /* 0x3ea51a66 */ -a2 = 6.7352302372e-02, /* 0x3d89f001 */ -a3 = 2.0580807701e-02, /* 0x3ca89915 */ -a4 = 7.3855509982e-03, /* 0x3bf2027e */ -a5 = 2.8905137442e-03, /* 0x3b3d6ec6 */ -a6 = 1.1927076848e-03, /* 0x3a9c54a1 */ -a7 = 5.1006977446e-04, /* 0x3a05b634 */ -a8 = 2.2086278477e-04, /* 0x39679767 */ -a9 = 1.0801156895e-04, /* 0x38e28445 */ -a10 = 2.5214456400e-05, /* 0x37d383a2 */ -a11 = 4.4864096708e-05, /* 0x383c2c75 */ -tc = 1.4616321325e+00, /* 0x3fbb16c3 */ -tf = -1.2148628384e-01, /* 0xbdf8cdcd */ -/* tt = -(tail of tf) */ -tt = 6.6971006518e-09, /* 0x31e61c52 */ -t0 = 4.8383611441e-01, /* 0x3ef7b95e */ -t1 = -1.4758771658e-01, /* 0xbe17213c */ -t2 = 6.4624942839e-02, /* 0x3d845a15 */ -t3 = -3.2788541168e-02, /* 0xbd064d47 */ -t4 = 1.7970675603e-02, /* 0x3c93373d */ -t5 = -1.0314224288e-02, /* 0xbc28fcfe */ -t6 = 6.1005386524e-03, /* 0x3bc7e707 */ -t7 = -3.6845202558e-03, /* 0xbb7177fe */ -t8 = 2.2596477065e-03, /* 0x3b141699 */ -t9 = -1.4034647029e-03, /* 0xbab7f476 */ -t10 = 8.8108185446e-04, /* 0x3a66f867 */ -t11 = -5.3859531181e-04, /* 0xba0d3085 */ -t12 = 3.1563205994e-04, /* 0x39a57b6b */ -t13 = -3.1275415677e-04, /* 0xb9a3f927 */ -t14 = 3.3552918467e-04, /* 0x39afe9f7 */ -u0 = -7.7215664089e-02, /* 0xbd9e233f */ -u1 = 6.3282704353e-01, /* 0x3f2200f4 */ -u2 = 1.4549225569e+00, /* 0x3fba3ae7 */ -u3 = 9.7771751881e-01, /* 0x3f7a4bb2 */ -u4 = 2.2896373272e-01, /* 0x3e6a7578 */ -u5 = 1.3381091878e-02, /* 0x3c5b3c5e */ -v1 = 2.4559779167e+00, /* 0x401d2ebe */ -v2 = 2.1284897327e+00, /* 0x4008392d */ -v3 = 7.6928514242e-01, /* 0x3f44efdf */ -v4 = 1.0422264785e-01, /* 0x3dd572af */ -v5 = 3.2170924824e-03, /* 0x3b52d5db */ -s0 = -7.7215664089e-02, /* 0xbd9e233f */ -s1 = 2.1498242021e-01, /* 0x3e5c245a */ -s2 = 3.2577878237e-01, /* 0x3ea6cc7a */ -s3 = 1.4635047317e-01, /* 0x3e15dce6 */ -s4 = 2.6642270386e-02, /* 0x3cda40e4 */ -s5 = 1.8402845599e-03, /* 0x3af135b4 */ -s6 = 3.1947532989e-05, /* 0x3805ff67 */ -r1 = 1.3920053244e+00, /* 0x3fb22d3b */ -r2 = 7.2193557024e-01, /* 0x3f38d0c5 */ -r3 = 1.7193385959e-01, /* 0x3e300f6e */ -r4 = 1.8645919859e-02, /* 0x3c98bf54 */ -r5 = 7.7794247773e-04, /* 0x3a4beed6 */ -r6 = 7.3266842264e-06, /* 0x36f5d7bd */ -w0 = 4.1893854737e-01, /* 0x3ed67f1d */ -w1 = 8.3333335817e-02, /* 0x3daaaaab */ -w2 = -2.7777778450e-03, /* 0xbb360b61 */ -w3 = 7.9365057172e-04, /* 0x3a500cfd */ -w4 = -5.9518753551e-04, /* 0xba1c065c */ -w5 = 8.3633989561e-04, /* 0x3a5b3dd2 */ -w6 = -1.6309292987e-03; /* 0xbad5c4e8 */ - -/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */ -static float sin_pi(float x) -{ - double_t y; - int n; - - /* spurious inexact if odd int */ - x = 2*(x*0.5f - floorf(x*0.5f)); /* x mod 2.0 */ - - n = (int)(x*4); - n = (n+1)/2; - y = x - n*0.5f; - y *= 3.14159265358979323846; - switch (n) { - default: /* case 4: */ - case 0: return __sindf(y); - case 1: return __cosdf(y); - case 2: return __sindf(-y); - case 3: return -__cosdf(y); - } -} - -float __lgammaf_r(float x, int *signgamp) -{ - union {float f; uint32_t i;} u = {x}; - float t,y,z,nadj,p,p1,p2,p3,q,r,w; - uint32_t ix; - int i,sign; - - /* purge off +-inf, NaN, +-0, tiny and negative arguments */ - *signgamp = 1; - sign = u.i>>31; - ix = u.i & 0x7fffffff; - if (ix >= 0x7f800000) - return x*x; - if (ix < 0x35000000) { /* |x| < 2**-21, return -log(|x|) */ - if (sign) { - *signgamp = -1; - x = -x; - } - return -logf(x); - } - if (sign) { - x = -x; - t = sin_pi(x); - if (t == 0.0f) /* -integer */ - return 1.0f/(x-x); - if (t > 0.0f) - *signgamp = -1; - else - t = -t; - nadj = logf(pi/(t*x)); - } - - /* purge off 1 and 2 */ - if (ix == 0x3f800000 || ix == 0x40000000) - r = 0; - /* for x < 2.0 */ - else if (ix < 0x40000000) { - if (ix <= 0x3f666666) { /* lgamma(x) = lgamma(x+1)-log(x) */ - r = -logf(x); - if (ix >= 0x3f3b4a20) { - y = 1.0f - x; - i = 0; - } else if (ix >= 0x3e6d3308) { - y = x - (tc-1.0f); - i = 1; - } else { - y = x; - i = 2; - } - } else { - r = 0.0f; - if (ix >= 0x3fdda618) { /* [1.7316,2] */ - y = 2.0f - x; - i = 0; - } else if (ix >= 0x3F9da620) { /* [1.23,1.73] */ - y = x - tc; - i = 1; - } else { - y = x - 1.0f; - 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 - 0.5f*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 = 1.0f+y*(v1+y*(v2+y*(v3+y*(v4+y*v5)))); - r += -0.5f*y + p1/p2; - } - } else if (ix < 0x41000000) { /* x < 8.0 */ - i = (int)x; - y = x - (float)i; - p = y*(s0+y*(s1+y*(s2+y*(s3+y*(s4+y*(s5+y*s6)))))); - q = 1.0f+y*(r1+y*(r2+y*(r3+y*(r4+y*(r5+y*r6))))); - r = 0.5f*y+p/q; - z = 1.0f; /* lgamma(1+s) = log(s) + lgamma(s) */ - switch (i) { - case 7: z *= y + 6.0f; /* FALLTHRU */ - case 6: z *= y + 5.0f; /* FALLTHRU */ - case 5: z *= y + 4.0f; /* FALLTHRU */ - case 4: z *= y + 3.0f; /* FALLTHRU */ - case 3: z *= y + 2.0f; /* FALLTHRU */ - r += logf(z); - break; - } - } else if (ix < 0x5c800000) { /* 8.0 <= x < 2**58 */ - t = logf(x); - z = 1.0f/x; - y = z*z; - w = w0+z*(w1+y*(w2+y*(w3+y*(w4+y*(w5+y*w6))))); - r = (x-0.5f)*(t-1.0f)+w; - } else /* 2**58 <= x <= inf */ - r = x*(logf(x)-1.0f); - if (sign) - r = nadj - r; - return r; -} - -weak_alias(__lgammaf_r, lgammaf_r); |