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Commit | Line | Data |
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e852e889 | 1 | /* w_gammaf.c -- float version of w_gamma.c. |
e852e889 UD |
2 | */ |
3 | ||
4 | /* | |
5 | * ==================================================== | |
6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
7 | * | |
8 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
9 | * Permission to use, copy, modify, and distribute this | |
10 | * software is freely granted, provided that this notice | |
11 | * is preserved. | |
12 | * ==================================================== | |
13 | */ | |
14 | ||
e47cc4e0 | 15 | #include <errno.h> |
9d13fb24 | 16 | #include <math.h> |
9277c064 | 17 | #include <math_private.h> |
813378e9 | 18 | #include <math-svid-compat.h> |
5bcdb315 | 19 | #include <libm-alias-float.h> |
e852e889 | 20 | |
4f3647e4 | 21 | #if LIBM_SVID_COMPAT |
0ac5ae23 UD |
22 | float |
23 | __tgammaf(float x) | |
e852e889 | 24 | { |
e852e889 | 25 | int local_signgam; |
0ac5ae23 | 26 | float y = __ieee754_gammaf_r(x,&local_signgam); |
e852e889 | 27 | |
d81f90cc | 28 | if(__glibc_unlikely (!isfinite (y) || y == 0) |
89faa034 | 29 | && (isfinite (x) || (isinf (x) && x < 0.0)) |
0ac5ae23 | 30 | && _LIB_VERSION != _IEEE_) { |
52495f29 | 31 | if (x == (float)0.0) |
e852e889 | 32 | /* tgammaf pole */ |
0ac5ae23 | 33 | return __kernel_standard_f(x, x, 150); |
e44acb20 | 34 | else if(floorf(x)==x&&x<0.0f) |
52495f29 | 35 | /* tgammaf domain */ |
0ac5ae23 | 36 | return __kernel_standard_f(x, x, 141); |
e47cc4e0 JM |
37 | else if (y == 0) |
38 | /* tgammaf underflow */ | |
39 | __set_errno (ERANGE); | |
e852e889 UD |
40 | else |
41 | /* tgammaf overflow */ | |
0ac5ae23 | 42 | return __kernel_standard_f(x, x, 140); |
e852e889 | 43 | } |
0ac5ae23 | 44 | return local_signgam < 0 ? - y : y; |
e852e889 | 45 | } |
5bcdb315 | 46 | libm_alias_float (__tgamma, tgamma) |
4f3647e4 | 47 | #endif |