11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* s_erff.c -- float version of s_erf.c. 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ==================================================== 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Developed at SunPro, a Sun Microsystems, Inc. business. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Permission to use, copy, modify, and distribute this 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * software is freely granted, provided that this notice 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * is preserved. 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ==================================================== 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 16a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes#include <sys/cdefs.h> 17a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes__FBSDID("$FreeBSD$"); 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "math.h" 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "math_private.h" 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const float 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttiny = 1e-30, 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecthalf= 5.0000000000e-01, /* 0x3F000000 */ 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectone = 1.0000000000e+00, /* 0x3F800000 */ 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttwo = 2.0000000000e+00, /* 0x40000000 */ 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Coefficients for approximation to erf on [0,0.84375] 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectefx = 1.2837916613e-01, /* 0x3e0375d4 */ 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectefx8= 1.0270333290e+00, /* 0x3f8375d4 */ 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 33bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * Domain [0, 0.84375], range ~[-5.4446e-10,5.5197e-10]: 34bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * |(erf(x) - x)/x - p(x)/q(x)| < 2**-31. 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 36bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepp0 = 1.28379166e-01F, /* 0x1.06eba8p-3 */ 37bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepp1 = -3.36030394e-01F, /* -0x1.58185ap-2 */ 38bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepp2 = -1.86260219e-03F, /* -0x1.e8451ep-10 */ 39bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqq1 = 3.12324286e-01F, /* 0x1.3fd1f0p-2 */ 40bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqq2 = 2.16070302e-02F, /* 0x1.620274p-6 */ 41bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqq3 = -1.98859419e-03F, /* -0x1.04a626p-9 */ 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 43bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * Domain [0.84375, 1.25], range ~[-1.953e-11,1.940e-11]: 44bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * |(erf(x) - erx) - p(x)/q(x)| < 2**-36. 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 46bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleerx = 8.42697144e-01F, /* 0x1.af7600p-1. erf(1) rounded to 16 bits. */ 47bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepa0 = 3.64939137e-06F, /* 0x1.e9d022p-19 */ 48bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepa1 = 4.15109694e-01F, /* 0x1.a91284p-2 */ 49bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepa2 = -1.65179938e-01F, /* -0x1.5249dcp-3 */ 50bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlepa3 = 1.10914491e-01F, /* 0x1.c64e46p-4 */ 51bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqa1 = 6.02074385e-01F, /* 0x1.344318p-1 */ 52bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqa2 = 5.35934687e-01F, /* 0x1.126608p-1 */ 53bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqa3 = 1.68576106e-01F, /* 0x1.593e6ep-3 */ 54bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravleqa4 = 5.62181212e-02F, /* 0x1.cc89f2p-5 */ 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 56bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * Domain [1.25,1/0.35], range ~[-7.043e-10,7.457e-10]: 57bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * |log(x*erfc(x)) + x**2 + 0.5625 - r(x)/s(x)| < 2**-30 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 59bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlera0 = -9.87132732e-03F, /* -0x1.4376b2p-7 */ 60bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlera1 = -5.53605914e-01F, /* -0x1.1b723cp-1 */ 61bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlera2 = -2.17589188e+00F, /* -0x1.1683a0p+1 */ 62bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlera3 = -1.43268085e+00F, /* -0x1.6ec42cp+0 */ 63bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesa1 = 5.45995426e+00F, /* 0x1.5d6fe4p+2 */ 64bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesa2 = 6.69798088e+00F, /* 0x1.acabb8p+2 */ 65bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesa3 = 1.43113089e+00F, /* 0x1.6e5e98p+0 */ 66bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesa4 = -5.77397496e-02F, /* -0x1.d90108p-5 */ 67bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle/* 68bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * Domain [1/0.35, 11], range ~[-2.264e-13,2.336e-13]: 69bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle * |log(x*erfc(x)) + x**2 + 0.5625 - r(x)/s(x)| < 2**-42 70bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle */ 71bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlerb0 = -9.86494310e-03F, /* -0x1.434124p-7 */ 72bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlerb1 = -6.25171244e-01F, /* -0x1.401672p-1 */ 73bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlerb2 = -6.16498327e+00F, /* -0x1.8a8f16p+2 */ 74bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlerb3 = -1.66696873e+01F, /* -0x1.0ab70ap+4 */ 75bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlerb4 = -9.53764343e+00F, /* -0x1.313460p+3 */ 76bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesb1 = 1.26884899e+01F, /* 0x1.96081cp+3 */ 77bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesb2 = 4.51839523e+01F, /* 0x1.6978bcp+5 */ 78bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesb3 = 4.72810211e+01F, /* 0x1.7a3f88p+5 */ 79bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravlesb4 = 8.93033314e+00F; /* 0x1.1dc54ap+3 */ 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfloat 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecterff(float x) 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int32_t hx,ix,i; 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project float R,S,P,Q,s,y,z,r; 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project GET_FLOAT_WORD(hx,x); 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ix = hx&0x7fffffff; 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix>=0x7f800000) { /* erf(nan)=nan */ 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project i = ((u_int32_t)hx>>31)<<1; 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (float)(1-i)+one/x; /* erf(+-inf)=+-1 */ 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix < 0x3f580000) { /* |x|<0.84375 */ 94bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if(ix < 0x38800000) { /* |x|<2**-14 */ 95bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if (ix < 0x04000000) /* |x|<0x1p-119 */ 96bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle return (8*x+efx8*x)/8; /* avoid spurious underflow */ 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return x + efx*x; 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project z = x*x; 100bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle r = pp0+z*(pp1+z*pp2); 101bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle s = one+z*(qq1+z*(qq2+z*qq3)); 1021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project y = r/s; 1031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return x + x*y; 1041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix < 0x3fa00000) { /* 0.84375 <= |x| < 1.25 */ 1061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = fabsf(x)-one; 107bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle P = pa0+s*(pa1+s*(pa2+s*pa3)); 108bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle Q = one+s*(qa1+s*(qa2+s*(qa3+s*qa4))); 1091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>=0) return erx + P/Q; else return -erx - P/Q; 1101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 111bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if (ix >= 0x40800000) { /* inf>|x|>=4 */ 1121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>=0) return one-tiny; else return tiny-one; 1131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project x = fabsf(x); 1151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = one/(x*x); 1161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix< 0x4036DB6E) { /* |x| < 1/0.35 */ 117bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle R=ra0+s*(ra1+s*(ra2+s*ra3)); 118bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle S=one+s*(sa1+s*(sa2+s*(sa3+s*sa4))); 1191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { /* |x| >= 1/0.35 */ 120bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle R=rb0+s*(rb1+s*(rb2+s*(rb3+s*rb4))); 121bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle S=one+s*(sb1+s*(sb2+s*(sb3+s*sb4))); 1221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 123bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle SET_FLOAT_WORD(z,hx&0xffffe000); 124bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle r = expf(-z*z-0.5625F)*expf((z-x)*(z+x)+R/S); 1251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>=0) return one-r/x; else return r/x-one; 1261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 1271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfloat 1291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecterfcf(float x) 1301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 1311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int32_t hx,ix; 1321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project float R,S,P,Q,s,y,z,r; 1331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project GET_FLOAT_WORD(hx,x); 1341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ix = hx&0x7fffffff; 1351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix>=0x7f800000) { /* erfc(nan)=nan */ 1361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* erfc(+-inf)=0,2 */ 1371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (float)(((u_int32_t)hx>>31)<<1)+one/x; 1381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix < 0x3f580000) { /* |x|<0.84375 */ 141bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if(ix < 0x33800000) /* |x|<2**-24 */ 1421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return one-x; 1431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project z = x*x; 144bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle r = pp0+z*(pp1+z*pp2); 145bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle s = one+z*(qq1+z*(qq2+z*qq3)); 1461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project y = r/s; 1471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx < 0x3e800000) { /* x<1/4 */ 1481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return one-(x+x*y); 1491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project r = x*y; 1511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project r += (x-half); 1521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return half - r ; 1531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix < 0x3fa00000) { /* 0.84375 <= |x| < 1.25 */ 1561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = fabsf(x)-one; 157bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle P = pa0+s*(pa1+s*(pa2+s*pa3)); 158bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle Q = one+s*(qa1+s*(qa2+s*(qa3+s*qa4))); 1591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>=0) { 1601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project z = one-erx; return z - P/Q; 1611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project z = erx+P/Q; return one+z; 1631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 165bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if (ix < 0x41300000) { /* |x|<11 */ 1661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project x = fabsf(x); 1671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = one/(x*x); 1681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix< 0x4036DB6D) { /* |x| < 1/.35 ~ 2.857143*/ 169bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle R=ra0+s*(ra1+s*(ra2+s*ra3)); 170bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle S=one+s*(sa1+s*(sa2+s*(sa3+s*sa4))); 1711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { /* |x| >= 1/.35 ~ 2.857143 */ 172bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle if(hx<0&&ix>=0x40a00000) return two-tiny;/* x < -5 */ 173bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle R=rb0+s*(rb1+s*(rb2+s*(rb3+s*rb4))); 174bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle S=one+s*(sb1+s*(sb2+s*(sb3+s*sb4))); 1751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 176bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle SET_FLOAT_WORD(z,hx&0xffffe000); 177bd3155dc5ddf09647388ad7f8fdbe6df123fbd6aCalin Juravle r = expf(-z*z-0.5625F)*expf((z-x)*(z+x)+R/S); 1781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>0) return r/x; else return two-r/x; 1791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(hx>0) return tiny*tiny; else return two-tiny; 1811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 183