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3362 | Serge | 1 | /* w_gammaf.c -- float version of w_gamma.c. |
2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
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3 | */ |
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4 | |||
5 | /* |
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6 | * ==================================================== |
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7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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8 | * |
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9 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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10 | * Permission to use, copy, modify, and distribute this |
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11 | * software is freely granted, provided that this notice |
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12 | * is preserved. |
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13 | * ==================================================== |
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14 | */ |
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15 | |||
16 | #include "math.h" |
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17 | #include "fdlibm.h" |
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18 | |||
19 | #ifdef __STDC__ |
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20 | float tgammaf(float x) |
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21 | #else |
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22 | float tgammaf(x) |
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23 | float x; |
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24 | #endif |
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25 | { |
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26 | float y; |
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27 | int local_signgam; |
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28 | y = __ieee754_gammaf_r(x,&local_signgam); |
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29 | if (local_signgam < 0) y = -y; |
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30 | #ifdef _IEEE_LIBM |
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31 | return y; |
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32 | #else |
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33 | if(_LIB_VERSION == _IEEE_) return y; |
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34 | |||
35 | if(!finitef(y)&&finitef(x)) { |
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36 | if(floorf(x)==x&&x<=(float)0.0) |
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37 | /* tgammaf pole */ |
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38 | return (float)__kernel_standard((double)x,(double)x,141); |
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39 | else |
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40 | /* tgammaf overflow */ |
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41 | return (float)__kernel_standard((double)x,(double)x,140); |
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42 | } |
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43 | return y; |
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44 | #endif |
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45 | } |
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46 | |||
47 | #ifdef _DOUBLE_IS_32BITS |
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48 | |||
49 | #ifdef __STDC__ |
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50 | double tgamma(double x) |
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51 | #else |
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52 | double tgamma(x) |
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53 | double x; |
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54 | #endif |
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55 | { |
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56 | return (double) tgammaf((float) x); |
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57 | } |
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58 | |||
59 | #endif /* defined(_DOUBLE_IS_32BITS) */=(float)0.0) |