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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* e_scalbf.c -- float version of e_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: e_scalbf.c,v 1.2 1995/05/30 05:48:45 rgrimes Exp $"; |
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| 18 | #endif |
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| 19 | |||
| 20 | #include "math.h" |
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| 21 | #include "math_private.h" |
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| 22 | |||
| 23 | #ifdef _SCALB_INT |
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| 24 | #ifdef __STDC__ |
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| 25 | float __ieee754_scalbf(float x, int fn) |
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| 26 | #else |
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| 27 | float __ieee754_scalbf(x,fn) |
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| 28 | float x; int fn; |
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| 29 | #endif |
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| 30 | #else |
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| 31 | #ifdef __STDC__ |
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| 32 | float __ieee754_scalbf(float x, float fn) |
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| 33 | #else |
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| 34 | float __ieee754_scalbf(x,fn) |
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| 35 | float x, fn; |
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| 36 | #endif |
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| 37 | #endif |
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| 38 | { |
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| 39 | #ifdef _SCALB_INT |
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| 40 | return scalbnf(x,fn); |
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| 41 | #else |
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| 42 | if (isnanf(x)||isnanf(fn)) return x*fn; |
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| 43 | if (!finitef(fn)) { |
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| 44 | if(fn>(float)0.0) return x*fn; |
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| 45 | else return x/(-fn); |
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| 46 | } |
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| 47 | if (rintf(fn)!=fn) return (fn-fn)/(fn-fn); |
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| 48 | if ( fn > (float)65000.0) return scalbnf(x, 65000); |
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| 49 | if (-fn > (float)65000.0) return scalbnf(x,-65000); |
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| 50 | return scalbnf(x,(int)fn); |
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| 51 | #endif |
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| 52 | } |