diff options
Diffstat (limited to 'newlib/libm/math/ef_acosh.c')
| -rw-r--r-- | newlib/libm/math/ef_acosh.c | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/newlib/libm/math/ef_acosh.c b/newlib/libm/math/ef_acosh.c deleted file mode 100644 index 1119c2c86..000000000 --- a/newlib/libm/math/ef_acosh.c +++ /dev/null @@ -1,53 +0,0 @@ -/* ef_acosh.c -- float version of e_acosh.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 "fdlibm.h" - -#ifdef __STDC__ -static const float -#else -static float -#endif -one = 1.0, -ln2 = 6.9314718246e-01; /* 0x3f317218 */ - -#ifdef __STDC__ - float __ieee754_acoshf(float x) -#else - float __ieee754_acoshf(x) - float x; -#endif -{ - float t; - __int32_t hx; - GET_FLOAT_WORD(hx,x); - if(hx<0x3f800000) { /* x < 1 */ - return (x-x)/(x-x); - } else if(hx >=0x4d800000) { /* x > 2**28 */ - if(!FLT_UWORD_IS_FINITE(hx)) { /* x is inf of NaN */ - return x+x; - } else - return __ieee754_logf(x)+ln2; /* acosh(huge)=log(2x) */ - } else if (hx==0x3f800000) { - return 0.0; /* acosh(1) = 0 */ - } else if (hx > 0x40000000) { /* 2**28 > x > 2 */ - t=x*x; - return __ieee754_logf((float)2.0*x-one/(x+__ieee754_sqrtf(t-one))); - } else { /* 1<x<2 */ - t = x-one; - return log1pf(t+__ieee754_sqrtf((float)2.0*t+t*t)); - } -} |