diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_asinhf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_asinhf.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_asinhf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_asinhf.c new file mode 100644 index 0000000000..da9cafb600 --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_asinhf.c @@ -0,0 +1,50 @@ +/* s_asinhf.c -- float version of s_asinh.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 <float.h> +#include <math.h> +#include <math_private.h> + +static const float +one = 1.0000000000e+00, /* 0x3F800000 */ +ln2 = 6.9314718246e-01, /* 0x3f317218 */ +huge= 1.0000000000e+30; + +float +__asinhf(float x) +{ + float w; + int32_t hx,ix; + GET_FLOAT_WORD(hx,x); + ix = hx&0x7fffffff; + if(__builtin_expect(ix< 0x38000000, 0)) { /* |x|<2**-14 */ + math_check_force_underflow (x); + if(huge+x>one) return x; /* return x inexact except 0 */ + } + if(__builtin_expect(ix>0x47000000, 0)) { /* |x| > 2**14 */ + if(ix>=0x7f800000) return x+x; /* x is inf or NaN */ + w = __ieee754_logf(fabsf(x))+ln2; + } else { + float xa = fabsf(x); + if (ix>0x40000000) { /* 2**14 > |x| > 2.0 */ + w = __ieee754_logf(2.0f*xa+one/(__ieee754_sqrtf(xa*xa+one)+xa)); + } else { /* 2.0 > |x| > 2**-14 */ + float t = xa*xa; + w =__log1pf(xa+t/(one+__ieee754_sqrtf(one+t))); + } + } + return __copysignf(w, x); +} +weak_alias (__asinhf, asinhf) |