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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* w_scalbf.c -- float version of w_scalb.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_scalbf.c,v 1.2 1995/05/30 05:51:42 rgrimes Exp $"; |
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| 18 | #endif |
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| 19 | |||
| 20 | /* |
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| 21 | * wrapper scalbf(float x, float fn) is provide for |
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| 22 | * passing various standard test suite. One |
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| 23 | * should use scalbn() instead. |
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| 24 | */ |
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| 25 | |||
| 26 | #include "math.h" |
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| 27 | #include "math_private.h" |
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| 28 | |||
| 29 | #include <errno.h> |
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| 30 | |||
| 31 | #ifdef __STDC__ |
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| 32 | #ifdef _SCALB_INT |
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| 33 | float scalbf(float x, int fn) /* wrapper scalbf */ |
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| 34 | #else |
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| 35 | float scalbf(float x, float fn) /* wrapper scalbf */ |
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| 36 | #endif |
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| 37 | #else |
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| 38 | float scalbf(x,fn) /* wrapper scalbf */ |
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| 39 | #ifdef _SCALB_INT |
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| 40 | float x; int fn; |
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| 41 | #else |
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| 42 | float x,fn; |
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| 43 | #endif |
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| 44 | #endif |
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| 45 | { |
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| 46 | #ifdef _IEEE_LIBM |
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| 47 | return __ieee754_scalbf(x,fn); |
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| 48 | #else |
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| 49 | float z; |
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| 50 | z = __ieee754_scalbf(x,fn); |
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| 51 | if(_LIB_VERSION == _IEEE_) return z; |
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| 52 | if(!(finitef(z)||isnanf(z))&&finitef(x)) { |
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| 53 | /* scalbf overflow */ |
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| 54 | return (float)__kernel_standard((double)x,(double)fn,132); |
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| 55 | } |
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| 56 | if(z==(float)0.0&&z!=x) { |
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| 57 | /* scalbf underflow */ |
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| 58 | return (float)__kernel_standard((double)x,(double)fn,133); |
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| 59 | } |
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| 60 | #ifndef _SCALB_INT |
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| 61 | if(!finitef(fn)) errno = ERANGE; |
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| 62 | #endif |
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| 63 | return z; |
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| 64 | #endif |
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| 65 | } |