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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* w_logf.c -- float version of w_log.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 | #ifndef lint |
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| 17 | static char rcsid[] = "$\Id: w_logf.c,v 1.2 1995/05/30 05:51:36 rgrimes Exp $"; |
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| 18 | #endif |
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| 19 | |||
| 20 | /* |
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| 21 | * wrapper logf(x) |
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| 22 | */ |
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| 23 | |||
| 24 | #include "math.h" |
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| 25 | #include "math_private.h" |
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| 26 | |||
| 27 | |||
| 28 | #ifdef __STDC__ |
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| 29 | float logf(float x) /* wrapper logf */ |
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| 30 | #else |
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| 31 | float logf(x) /* wrapper logf */ |
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| 32 | float x; |
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| 33 | #endif |
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| 34 | { |
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| 35 | #ifdef _IEEE_LIBM |
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| 36 | return __ieee754_logf(x); |
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| 37 | #else |
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| 38 | float z; |
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| 39 | z = __ieee754_logf(x); |
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| 40 | if(_LIB_VERSION == _IEEE_ || isnanf(x) || x > (float)0.0) return z; |
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| 41 | if(x==(float)0.0) |
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| 42 | /* logf(0) */ |
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| 43 | return (float)__kernel_standard((double)x,(double)x,116); |
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| 44 | else |
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| 45 | /* logf(x<0) */ |
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| 46 | return (float)__kernel_standard((double)x,(double)x,117); |
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| 47 | #endif |
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| 48 | } |