The subject is incorrect, should be fix bug in tgamma.
On Wed, Nov 05, 2014 at 01:14:43PM +0800, Zhigang Gong wrote: > tgamma is actually lgamma, a related but very different function. > > This patch is from: > https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=Fix-pow-erf-tgamma.patch;att=3;bug=768090 > > Signed-off-by: Zhigang Gong <zhigang.g...@intel.com> > --- > backend/src/ocl_stdlib.tmpl.h | 189 > ++---------------------------------------- > 1 file changed, 7 insertions(+), 182 deletions(-) > > diff --git a/backend/src/ocl_stdlib.tmpl.h b/backend/src/ocl_stdlib.tmpl.h > index cacba85..1b89109 100755 > --- a/backend/src/ocl_stdlib.tmpl.h > +++ b/backend/src/ocl_stdlib.tmpl.h > @@ -1565,188 +1565,6 @@ INLINE_OVERLOADABLE float native_log2(float x) { > return __gen_ocl_log(x); } > INLINE_OVERLOADABLE float native_log(float x) { > return native_log2(x) * 0.6931472002f; > } > -INLINE_OVERLOADABLE float tgamma(float x) { > -/* > - * ==================================================== > - * 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. > - * ==================================================== > - */ > - float pi = 3.1415927410e+00, > - a0 = 7.7215664089e-02, > - a1 = 3.2246702909e-01, > - a2 = 6.7352302372e-02, > - a3 = 2.0580807701e-02, > - a4 = 7.3855509982e-03, > - a5 = 2.8905137442e-03, > - a6 = 1.1927076848e-03, > - a7 = 5.1006977446e-04, > - a8 = 2.2086278477e-04, > - a9 = 1.0801156895e-04, > - a10 = 2.5214456400e-05, > - a11 = 4.4864096708e-05, > - tc = 1.4616321325e+00, > - tf = -1.2148628384e-01, > - tt = 6.6971006518e-09, > - t0 = 4.8383611441e-01, > - t1 = -1.4758771658e-01, > - t2 = 6.4624942839e-02, > - t3 = -3.2788541168e-02, > - t4 = 1.7970675603e-02, > - t5 = -1.0314224288e-02, > - t6 = 6.1005386524e-03, > - t7 = -3.6845202558e-03, > - t8 = 2.2596477065e-03, > - t9 = -1.4034647029e-03, > - t10 = 8.8108185446e-04, > - t11 = -5.3859531181e-04, > - t12 = 3.1563205994e-04, > - t13 = -3.1275415677e-04, > - t14 = 3.3552918467e-04, > - u0 = -7.7215664089e-02, > - u1 = 6.3282704353e-01, > - u2 = 1.4549225569e+00, > - u3 = 9.7771751881e-01, > - u4 = 2.2896373272e-01, > - u5 = 1.3381091878e-02, > - v1 = 2.4559779167e+00, > - v2 = 2.1284897327e+00, > - v3 = 7.6928514242e-01, > - v4 = 1.0422264785e-01, > - v5 = 3.2170924824e-03, > - s0 = -7.7215664089e-02, > - s1 = 2.1498242021e-01, > - s2 = 3.2577878237e-01, > - s3 = 1.4635047317e-01, > - s4 = 2.6642270386e-02, > - s5 = 1.8402845599e-03, > - s6 = 3.1947532989e-05, > - r1 = 1.3920053244e+00, > - r2 = 7.2193557024e-01, > - r3 = 1.7193385959e-01, > - r4 = 1.8645919859e-02, > - r5 = 7.7794247773e-04, > - r6 = 7.3266842264e-06, > - w0 = 4.1893854737e-01, > - w1 = 8.3333335817e-02, > - w2 = -2.7777778450e-03, > - w3 = 7.9365057172e-04, > - w4 = -5.9518753551e-04, > - w5 = 8.3633989561e-04, > - w6 = -1.6309292987e-03; > - float t, y, z, nadj, p, p1, p2, p3, q, r, w; > - int i, hx, ix; > - nadj = 0; > - hx = *(int *) (&x); > - ix = hx & 0x7fffffff; > - if (ix >= 0x7f800000) > - return x * x; > - if (ix == 0) > - return INFINITY; > - if (ix < 0x1c800000) { > - if (hx < 0) { > - return - native_log(-x); > - } else > - return - native_log(x); > - } > - if (hx < 0) { > - if (ix >= 0x4b000000) > - return INFINITY; > - t = __gen_ocl_internal_sinpi(x); > - if (__gen_ocl_fabs(t) < 1e-8f) > - return INFINITY; > - nadj = native_log(M_PI_F / __gen_ocl_fabs(t * x)); > - x = -x; > - } > - > - if (ix == 0x3f800000 || ix == 0x40000000) > - r = 0; > - else if (ix < 0x40000000) { > - if (ix <= 0x3f666666) { > - r = - native_log(x); > - if (ix >= 0x3f3b4a20) { > - y = 1 - x; > - i = 0; > - } else if (ix >= 0x3e6d3308) { > - y = x - (tc - 1); > - i = 1; > - } else { > - y = x; > - i = 2; > - } > - } else { > - r = 0; > - if (ix >= 0x3fdda618) { > - y = 2 - x; > - i = 0; > - } else if (ix >= 0x3F9da620) { > - y = x - tc; > - i = 1; > - } else { > - y = x - 1; > - 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 - .5f * y); > - break; > - case 1: > - z = y * y; > - w = z * y; > - p1 = t0 + w * (t3 + w * (t6 + w * (t9 + w * t12))); > - 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 + y * (v1 + y * (v2 + y * (v3 + y * (v4 + y * v5)))); > - r += (-.5f * y + p1 / p2); > - } > - } else if (ix < 0x41000000) { > - i = x; > - t = 0; > - y = x - i; > - p = y*(s0+y*(s1+y*(s2+y*(s3+y*(s4+y*(s5+y*s6)))))); > - q = 1 + y * (r1 + y * (r2 + y * (r3 + y * (r4 + y * (r5 + y * r6))))); > - r = .5f * y + p / q; > - z = 1; > - switch (i) { > - case 7: > - z *= (y + 6.f); > - case 6: > - z *= (y + 5.f); > - case 5: > - z *= (y + 4.f); > - case 4: > - z *= (y + 3.f); > - case 3: > - z *= (y + 2.f); > - r += native_log(z); > - break; > - } > - } else if (ix < 0x5c800000) { > - t = native_log(x); > - z = 1 / x; > - y = z * z; > - w = w0 + z * (w1 + y * (w2 + y * (w3 + y * (w4 + y * (w5 + y * w6))))); > - r = (x - .5f) * (t - 1) + w; > - } else > - r = x * (native_log(x) - 1); > - if (hx < 0) > - r = nadj - r; > - return r; > -} > > INLINE_OVERLOADABLE float lgamma(float x) { > /* > @@ -2721,6 +2539,13 @@ INLINE_OVERLOADABLE float __gen_ocl_internal_exp(float > x) { > } > } > > +INLINE_OVERLOADABLE float tgamma(float x) { > + float y; > + int s; > + y=lgamma_r(x,&s); > + return __gen_ocl_internal_exp(y)*s; > +} > + > /* erf,erfc from glibc s_erff.c -- float version of s_erf.c. > * Conversion to float by Ian Lance Taylor, Cygnus Support, i...@cygnus.com. > */ > -- > 1.8.3.2 > > _______________________________________________ > Beignet mailing list > Beignet@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/beignet _______________________________________________ Beignet mailing list Beignet@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/beignet
