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Unified Diff: fusl/src/math/lgamma_r.c

Issue 1714623002: [fusl] clang-format fusl (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: headers too Created 4 years, 10 months ago
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Index: fusl/src/math/lgamma_r.c
diff --git a/fusl/src/math/lgamma_r.c b/fusl/src/math/lgamma_r.c
index fff565d228ef626145e9f152f5478e88906f8079..7dd28515b720762c348273ee8b17b91b7c7b4843 100644
--- a/fusl/src/math/lgamma_r.c
+++ b/fusl/src/math/lgamma_r.c
@@ -81,204 +81,215 @@
#include "libm.h"
#include "libc.h"
-static const double
-pi = 3.14159265358979311600e+00, /* 0x400921FB, 0x54442D18 */
-a0 = 7.72156649015328655494e-02, /* 0x3FB3C467, 0xE37DB0C8 */
-a1 = 3.22467033424113591611e-01, /* 0x3FD4A34C, 0xC4A60FAD */
-a2 = 6.73523010531292681824e-02, /* 0x3FB13E00, 0x1A5562A7 */
-a3 = 2.05808084325167332806e-02, /* 0x3F951322, 0xAC92547B */
-a4 = 7.38555086081402883957e-03, /* 0x3F7E404F, 0xB68FEFE8 */
-a5 = 2.89051383673415629091e-03, /* 0x3F67ADD8, 0xCCB7926B */
-a6 = 1.19270763183362067845e-03, /* 0x3F538A94, 0x116F3F5D */
-a7 = 5.10069792153511336608e-04, /* 0x3F40B6C6, 0x89B99C00 */
-a8 = 2.20862790713908385557e-04, /* 0x3F2CF2EC, 0xED10E54D */
-a9 = 1.08011567247583939954e-04, /* 0x3F1C5088, 0x987DFB07 */
-a10 = 2.52144565451257326939e-05, /* 0x3EFA7074, 0x428CFA52 */
-a11 = 4.48640949618915160150e-05, /* 0x3F07858E, 0x90A45837 */
-tc = 1.46163214496836224576e+00, /* 0x3FF762D8, 0x6356BE3F */
-tf = -1.21486290535849611461e-01, /* 0xBFBF19B9, 0xBCC38A42 */
-/* tt = -(tail of tf) */
-tt = -3.63867699703950536541e-18, /* 0xBC50C7CA, 0xA48A971F */
-t0 = 4.83836122723810047042e-01, /* 0x3FDEF72B, 0xC8EE38A2 */
-t1 = -1.47587722994593911752e-01, /* 0xBFC2E427, 0x8DC6C509 */
-t2 = 6.46249402391333854778e-02, /* 0x3FB08B42, 0x94D5419B */
-t3 = -3.27885410759859649565e-02, /* 0xBFA0C9A8, 0xDF35B713 */
-t4 = 1.79706750811820387126e-02, /* 0x3F9266E7, 0x970AF9EC */
-t5 = -1.03142241298341437450e-02, /* 0xBF851F9F, 0xBA91EC6A */
-t6 = 6.10053870246291332635e-03, /* 0x3F78FCE0, 0xE370E344 */
-t7 = -3.68452016781138256760e-03, /* 0xBF6E2EFF, 0xB3E914D7 */
-t8 = 2.25964780900612472250e-03, /* 0x3F6282D3, 0x2E15C915 */
-t9 = -1.40346469989232843813e-03, /* 0xBF56FE8E, 0xBF2D1AF1 */
-t10 = 8.81081882437654011382e-04, /* 0x3F4CDF0C, 0xEF61A8E9 */
-t11 = -5.38595305356740546715e-04, /* 0xBF41A610, 0x9C73E0EC */
-t12 = 3.15632070903625950361e-04, /* 0x3F34AF6D, 0x6C0EBBF7 */
-t13 = -3.12754168375120860518e-04, /* 0xBF347F24, 0xECC38C38 */
-t14 = 3.35529192635519073543e-04, /* 0x3F35FD3E, 0xE8C2D3F4 */
-u0 = -7.72156649015328655494e-02, /* 0xBFB3C467, 0xE37DB0C8 */
-u1 = 6.32827064025093366517e-01, /* 0x3FE4401E, 0x8B005DFF */
-u2 = 1.45492250137234768737e+00, /* 0x3FF7475C, 0xD119BD6F */
-u3 = 9.77717527963372745603e-01, /* 0x3FEF4976, 0x44EA8450 */
-u4 = 2.28963728064692451092e-01, /* 0x3FCD4EAE, 0xF6010924 */
-u5 = 1.33810918536787660377e-02, /* 0x3F8B678B, 0xBF2BAB09 */
-v1 = 2.45597793713041134822e+00, /* 0x4003A5D7, 0xC2BD619C */
-v2 = 2.12848976379893395361e+00, /* 0x40010725, 0xA42B18F5 */
-v3 = 7.69285150456672783825e-01, /* 0x3FE89DFB, 0xE45050AF */
-v4 = 1.04222645593369134254e-01, /* 0x3FBAAE55, 0xD6537C88 */
-v5 = 3.21709242282423911810e-03, /* 0x3F6A5ABB, 0x57D0CF61 */
-s0 = -7.72156649015328655494e-02, /* 0xBFB3C467, 0xE37DB0C8 */
-s1 = 2.14982415960608852501e-01, /* 0x3FCB848B, 0x36E20878 */
-s2 = 3.25778796408930981787e-01, /* 0x3FD4D98F, 0x4F139F59 */
-s3 = 1.46350472652464452805e-01, /* 0x3FC2BB9C, 0xBEE5F2F7 */
-s4 = 2.66422703033638609560e-02, /* 0x3F9B481C, 0x7E939961 */
-s5 = 1.84028451407337715652e-03, /* 0x3F5E26B6, 0x7368F239 */
-s6 = 3.19475326584100867617e-05, /* 0x3F00BFEC, 0xDD17E945 */
-r1 = 1.39200533467621045958e+00, /* 0x3FF645A7, 0x62C4AB74 */
-r2 = 7.21935547567138069525e-01, /* 0x3FE71A18, 0x93D3DCDC */
-r3 = 1.71933865632803078993e-01, /* 0x3FC601ED, 0xCCFBDF27 */
-r4 = 1.86459191715652901344e-02, /* 0x3F9317EA, 0x742ED475 */
-r5 = 7.77942496381893596434e-04, /* 0x3F497DDA, 0xCA41A95B */
-r6 = 7.32668430744625636189e-06, /* 0x3EDEBAF7, 0xA5B38140 */
-w0 = 4.18938533204672725052e-01, /* 0x3FDACFE3, 0x90C97D69 */
-w1 = 8.33333333333329678849e-02, /* 0x3FB55555, 0x5555553B */
-w2 = -2.77777777728775536470e-03, /* 0xBF66C16C, 0x16B02E5C */
-w3 = 7.93650558643019558500e-04, /* 0x3F4A019F, 0x98CF38B6 */
-w4 = -5.95187557450339963135e-04, /* 0xBF4380CB, 0x8C0FE741 */
-w5 = 8.36339918996282139126e-04, /* 0x3F4B67BA, 0x4CDAD5D1 */
-w6 = -1.63092934096575273989e-03; /* 0xBF5AB89D, 0x0B9E43E4 */
+static const double pi =
+ 3.14159265358979311600e+00, /* 0x400921FB, 0x54442D18 */
+ a0 = 7.72156649015328655494e-02, /* 0x3FB3C467, 0xE37DB0C8 */
+ a1 = 3.22467033424113591611e-01, /* 0x3FD4A34C, 0xC4A60FAD */
+ a2 = 6.73523010531292681824e-02, /* 0x3FB13E00, 0x1A5562A7 */
+ a3 = 2.05808084325167332806e-02, /* 0x3F951322, 0xAC92547B */
+ a4 = 7.38555086081402883957e-03, /* 0x3F7E404F, 0xB68FEFE8 */
+ a5 = 2.89051383673415629091e-03, /* 0x3F67ADD8, 0xCCB7926B */
+ a6 = 1.19270763183362067845e-03, /* 0x3F538A94, 0x116F3F5D */
+ a7 = 5.10069792153511336608e-04, /* 0x3F40B6C6, 0x89B99C00 */
+ a8 = 2.20862790713908385557e-04, /* 0x3F2CF2EC, 0xED10E54D */
+ a9 = 1.08011567247583939954e-04, /* 0x3F1C5088, 0x987DFB07 */
+ a10 = 2.52144565451257326939e-05, /* 0x3EFA7074, 0x428CFA52 */
+ a11 = 4.48640949618915160150e-05, /* 0x3F07858E, 0x90A45837 */
+ tc = 1.46163214496836224576e+00, /* 0x3FF762D8, 0x6356BE3F */
+ tf = -1.21486290535849611461e-01, /* 0xBFBF19B9, 0xBCC38A42 */
+ /* tt = -(tail of tf) */
+ tt = -3.63867699703950536541e-18, /* 0xBC50C7CA, 0xA48A971F */
+ t0 = 4.83836122723810047042e-01, /* 0x3FDEF72B, 0xC8EE38A2 */
+ t1 = -1.47587722994593911752e-01, /* 0xBFC2E427, 0x8DC6C509 */
+ t2 = 6.46249402391333854778e-02, /* 0x3FB08B42, 0x94D5419B */
+ t3 = -3.27885410759859649565e-02, /* 0xBFA0C9A8, 0xDF35B713 */
+ t4 = 1.79706750811820387126e-02, /* 0x3F9266E7, 0x970AF9EC */
+ t5 = -1.03142241298341437450e-02, /* 0xBF851F9F, 0xBA91EC6A */
+ t6 = 6.10053870246291332635e-03, /* 0x3F78FCE0, 0xE370E344 */
+ t7 = -3.68452016781138256760e-03, /* 0xBF6E2EFF, 0xB3E914D7 */
+ t8 = 2.25964780900612472250e-03, /* 0x3F6282D3, 0x2E15C915 */
+ t9 = -1.40346469989232843813e-03, /* 0xBF56FE8E, 0xBF2D1AF1 */
+ t10 = 8.81081882437654011382e-04, /* 0x3F4CDF0C, 0xEF61A8E9 */
+ t11 = -5.38595305356740546715e-04, /* 0xBF41A610, 0x9C73E0EC */
+ t12 = 3.15632070903625950361e-04, /* 0x3F34AF6D, 0x6C0EBBF7 */
+ t13 = -3.12754168375120860518e-04, /* 0xBF347F24, 0xECC38C38 */
+ t14 = 3.35529192635519073543e-04, /* 0x3F35FD3E, 0xE8C2D3F4 */
+ u0 = -7.72156649015328655494e-02, /* 0xBFB3C467, 0xE37DB0C8 */
+ u1 = 6.32827064025093366517e-01, /* 0x3FE4401E, 0x8B005DFF */
+ u2 = 1.45492250137234768737e+00, /* 0x3FF7475C, 0xD119BD6F */
+ u3 = 9.77717527963372745603e-01, /* 0x3FEF4976, 0x44EA8450 */
+ u4 = 2.28963728064692451092e-01, /* 0x3FCD4EAE, 0xF6010924 */
+ u5 = 1.33810918536787660377e-02, /* 0x3F8B678B, 0xBF2BAB09 */
+ v1 = 2.45597793713041134822e+00, /* 0x4003A5D7, 0xC2BD619C */
+ v2 = 2.12848976379893395361e+00, /* 0x40010725, 0xA42B18F5 */
+ v3 = 7.69285150456672783825e-01, /* 0x3FE89DFB, 0xE45050AF */
+ v4 = 1.04222645593369134254e-01, /* 0x3FBAAE55, 0xD6537C88 */
+ v5 = 3.21709242282423911810e-03, /* 0x3F6A5ABB, 0x57D0CF61 */
+ s0 = -7.72156649015328655494e-02, /* 0xBFB3C467, 0xE37DB0C8 */
+ s1 = 2.14982415960608852501e-01, /* 0x3FCB848B, 0x36E20878 */
+ s2 = 3.25778796408930981787e-01, /* 0x3FD4D98F, 0x4F139F59 */
+ s3 = 1.46350472652464452805e-01, /* 0x3FC2BB9C, 0xBEE5F2F7 */
+ s4 = 2.66422703033638609560e-02, /* 0x3F9B481C, 0x7E939961 */
+ s5 = 1.84028451407337715652e-03, /* 0x3F5E26B6, 0x7368F239 */
+ s6 = 3.19475326584100867617e-05, /* 0x3F00BFEC, 0xDD17E945 */
+ r1 = 1.39200533467621045958e+00, /* 0x3FF645A7, 0x62C4AB74 */
+ r2 = 7.21935547567138069525e-01, /* 0x3FE71A18, 0x93D3DCDC */
+ r3 = 1.71933865632803078993e-01, /* 0x3FC601ED, 0xCCFBDF27 */
+ r4 = 1.86459191715652901344e-02, /* 0x3F9317EA, 0x742ED475 */
+ r5 = 7.77942496381893596434e-04, /* 0x3F497DDA, 0xCA41A95B */
+ r6 = 7.32668430744625636189e-06, /* 0x3EDEBAF7, 0xA5B38140 */
+ w0 = 4.18938533204672725052e-01, /* 0x3FDACFE3, 0x90C97D69 */
+ w1 = 8.33333333333329678849e-02, /* 0x3FB55555, 0x5555553B */
+ w2 = -2.77777777728775536470e-03, /* 0xBF66C16C, 0x16B02E5C */
+ w3 = 7.93650558643019558500e-04, /* 0x3F4A019F, 0x98CF38B6 */
+ w4 = -5.95187557450339963135e-04, /* 0xBF4380CB, 0x8C0FE741 */
+ w5 = 8.36339918996282139126e-04, /* 0x3F4B67BA, 0x4CDAD5D1 */
+ w6 = -1.63092934096575273989e-03; /* 0xBF5AB89D, 0x0B9E43E4 */
/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
-static double sin_pi(double x)
-{
- int n;
+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 */
+ /* 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;
+ 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);
- }
+ 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);
+ }
}
-double __lgamma_r(double x, int *signgamp)
-{
- union {double f; uint64_t i;} u = {x};
- double_t t,y,z,nadj,p,p1,p2,p3,q,r,w;
- uint32_t ix;
- int sign,i;
+double __lgamma_r(double x, int* signgamp) {
+ union {
+ double f;
+ uint64_t i;
+ } u = {x};
+ double_t t, y, z, nadj, p, p1, p2, p3, q, r, w;
+ uint32_t ix;
+ int sign, i;
- /* purge off +-inf, NaN, +-0, tiny and negative arguments */
- *signgamp = 1;
- 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;
- *signgamp = -1;
- }
- return -log(x);
- }
- if (sign) {
- x = -x;
- t = sin_pi(x);
- if (t == 0.0) /* -integer */
- return 1.0/(x-x);
- if (t > 0.0)
- *signgamp = -1;
- else
- t = -t;
- nadj = log(pi/(t*x));
- }
+ /* purge off +-inf, NaN, +-0, tiny and negative arguments */
+ *signgamp = 1;
+ 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;
+ *signgamp = -1;
+ }
+ return -log(x);
+ }
+ if (sign) {
+ x = -x;
+ t = sin_pi(x);
+ if (t == 0.0) /* -integer */
+ return 1.0 / (x - x);
+ if (t > 0.0)
+ *signgamp = -1;
+ else
+ t = -t;
+ nadj = log(pi / (t * x));
+ }
- /* purge off 1 and 2 */
- if ((ix == 0x3ff00000 || ix == 0x40000000) && (uint32_t)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; /* FALLTHRU */
- case 6: z *= y + 5.0; /* FALLTHRU */
- case 5: z *= y + 4.0; /* FALLTHRU */
- case 4: z *= y + 3.0; /* FALLTHRU */
- case 3: z *= y + 2.0; /* FALLTHRU */
- 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;
+ /* purge off 1 and 2 */
+ if ((ix == 0x3ff00000 || ix == 0x40000000) && (uint32_t)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; /* FALLTHRU */
+ case 6:
+ z *= y + 5.0; /* FALLTHRU */
+ case 5:
+ z *= y + 4.0; /* FALLTHRU */
+ case 4:
+ z *= y + 3.0; /* FALLTHRU */
+ case 3:
+ z *= y + 2.0; /* FALLTHRU */
+ 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;
}
weak_alias(__lgamma_r, lgamma_r);
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