projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* e_scalbf.c -- float version of e_scalb.c. |
| 2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. | |
| 3 | */ | |
| 4 | ||
| 5 | /* | |
| 6 | * ==================================================== | |
| 7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
| 8 | * | |
| 9 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
| 10 | * Permission to use, copy, modify, and distribute this | |
| 11 | * software is freely granted, provided that this notice | |
| 12 | * is preserved. | |
| 13 | * ==================================================== | |
| 14 | */ | |
| 15 | ||
| 16 | #if defined(LIBM_SCCS) && !defined(lint) | |
| 17 | static char rcsid[] = "$NetBSD: e_scalbf.c,v 1.3 1995/05/10 20:46:12 jtc Exp $"; | |
| 18 | #endif | |
| 19 | ||
| 20 | #include "math.h" | |
| 21 | #include "math_private.h" | |
| 22 | ||
| 23 | #ifdef _SCALB_INT | |
| 24 | #ifdef __STDC__ | |
| 25 | float __ieee754_scalbf(float x, int fn) | |
| 26 | #else | |
| 27 | float __ieee754_scalbf(x,fn) | |
| 28 | float x; int fn; | |
| 29 | #endif | |
| 30 | #else | |
| 31 | #ifdef __STDC__ | |
| 32 | float __ieee754_scalbf(float x, float fn) | |
| 33 | #else | |
| 34 | float __ieee754_scalbf(x,fn) | |
| 35 | float x, fn; | |
| 36 | #endif | |
| 37 | #endif | |
| 38 | { | |
| 39 | #ifdef _SCALB_INT | |
| 40 | return __scalbnf(x,fn); | |
| 41 | #else | |
| 42 | if (__isnanf(x)||__isnanf(fn)) return x*fn; | |
| 43 | if (!__finitef(fn)) { | |
| 44 | if(fn>(float)0.0) return x*fn; | |
| 45 | else return x/(-fn); | |
| 46 | } | |
| 47 | if (__rintf(fn)!=fn) return (fn-fn)/(fn-fn); | |
| 48 | if ( fn > (float)65000.0) return __scalbnf(x, 65000); | |
| 49 | if (-fn > (float)65000.0) return __scalbnf(x,-65000); | |
| 50 | return __scalbnf(x,(int)fn); | |
| 51 | #endif | |
| 52 | } |