projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| e852e889 UD |
1 | /* w_gammaf.c -- float version of w_gamma.c. |
| 2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. | |
| 3 | */ | |
| 4 | ||
| 5 | /* | |
| 6 | * ==================================================== | |
| 7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
| 8 | * | |
| 9 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
| 10 | * Permission to use, copy, modify, and distribute this | |
| 11 | * software is freely granted, provided that this notice | |
| 12 | * is preserved. | |
| 13 | * ==================================================== | |
| 14 | */ | |
| 15 | ||
| e47cc4e0 | 16 | #include <errno.h> |
| 9d13fb24 | 17 | #include <math.h> |
| 9277c064 | 18 | #include <math_private.h> |
| e852e889 | 19 | |
| 0ac5ae23 UD |
20 | float |
| 21 | __tgammaf(float x) | |
| e852e889 | 22 | { |
| e852e889 | 23 | int local_signgam; |
| 0ac5ae23 | 24 | float y = __ieee754_gammaf_r(x,&local_signgam); |
| e852e889 | 25 | |
| d81f90cc WD |
26 | if(__glibc_unlikely (!isfinite (y) || y == 0) |
| 27 | && (isfinite (x) || isinf (x) < 0) | |
| 0ac5ae23 | 28 | && _LIB_VERSION != _IEEE_) { |
| 52495f29 | 29 | if (x == (float)0.0) |
| e852e889 | 30 | /* tgammaf pole */ |
| 0ac5ae23 UD |
31 | return __kernel_standard_f(x, x, 150); |
| 32 | else if(__floorf(x)==x&&x<0.0f) | |
| 52495f29 | 33 | /* tgammaf domain */ |
| 0ac5ae23 | 34 | return __kernel_standard_f(x, x, 141); |
| e47cc4e0 JM |
35 | else if (y == 0) |
| 36 | /* tgammaf underflow */ | |
| 37 | __set_errno (ERANGE); | |
| e852e889 UD |
38 | else |
| 39 | /* tgammaf overflow */ | |
| 0ac5ae23 | 40 | return __kernel_standard_f(x, x, 140); |
| e852e889 | 41 | } |
| 0ac5ae23 | 42 | return local_signgam < 0 ? - y : y; |
| e852e889 UD |
43 | } |
| 44 | weak_alias (__tgammaf, tgammaf) |