11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* e_sinhf.c -- float version of e_sinh.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 one = 1.0, shuge = 1.0e37; 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfloat 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project__ieee754_sinhf(float x) 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 27a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes float t,h; 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int32_t ix,jx; 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project GET_FLOAT_WORD(jx,x); 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ix = jx&0x7fffffff; 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* x is INF or NaN */ 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix>=0x7f800000) return x+x; 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project h = 0.5; 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (jx<0) h = -h; 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* |x| in [0,9], return sign(x)*0.5*(E+E/(E+1))) */ 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (ix < 0x41100000) { /* |x|<9 */ 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (ix<0x39800000) /* |x|<2**-12 */ 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(shuge+x>one) return x;/* sinh(tiny) = tiny with inexact */ 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project t = expm1f(fabsf(x)); 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if(ix<0x3f800000) return h*((float)2.0*t-t*t/(t+one)); 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return h*(t+t/(t+one)); 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* |x| in [9, logf(maxfloat)] return 0.5*exp(|x|) */ 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (ix < 0x42b17217) return h*__ieee754_expf(fabsf(x)); 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* |x| in [logf(maxfloat), overflowthresold] */ 51a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes if (ix<=0x42b2d4fc) 52a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes return h*2.0F*__ldexp_expf(fabsf(x), -1); 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* |x| > overflowthresold, sinh(x) overflow */ 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return x*shuge; 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 57