projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* w_scalbf.c -- float version of w_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 | |
| c4029823 | 11 | * software is freely granted, provided that this notice |
| f7eac6eb RM |
12 | * is preserved. |
| 13 | * ==================================================== | |
| 14 | */ | |
| 15 | ||
| 16 | #if defined(LIBM_SCCS) && !defined(lint) | |
| 17 | static char rcsid[] = "$NetBSD: w_scalbf.c,v 1.3 1995/05/10 20:49:50 jtc Exp $"; | |
| 18 | #endif | |
| 19 | ||
| 20 | /* | |
| 21 | * wrapper scalbf(float x, float fn) is provide for | |
| c4029823 | 22 | * passing various standard test suite. One |
| f7eac6eb RM |
23 | * should use scalbn() instead. |
| 24 | */ | |
| 25 | ||
| 9d13fb24 | 26 | #include <math.h> |
| 9277c064 | 27 | #include <math_private.h> |
| f7eac6eb RM |
28 | |
| 29 | #include <errno.h> | |
| 30 | ||
| 31 | #ifdef __STDC__ | |
| 32 | #ifdef _SCALB_INT | |
| 33 | float __scalbf(float x, int fn) /* wrapper scalbf */ | |
| 34 | #else | |
| 35 | float __scalbf(float x, float fn) /* wrapper scalbf */ | |
| 36 | #endif | |
| 37 | #else | |
| 38 | float __scalbf(x,fn) /* wrapper scalbf */ | |
| 39 | #ifdef _SCALB_INT | |
| 40 | float x; int fn; | |
| 41 | #else | |
| 42 | float x,fn; | |
| 43 | #endif | |
| 44 | #endif | |
| 45 | { | |
| 46 | #ifdef _IEEE_LIBM | |
| 47 | return __ieee754_scalbf(x,fn); | |
| 48 | #else | |
| 49 | float z; | |
| 50 | z = __ieee754_scalbf(x,fn); | |
| 6d0c4914 | 51 | if(_LIB_VERSION != _SVID_) return z; |
| f7eac6eb RM |
52 | if(!(__finitef(z)||__isnanf(z))&&__finitef(x)) { |
| 53 | /* scalbf overflow */ | |
| 54 | return (float)__kernel_standard((double)x,(double)fn,132); | |
| 55 | } | |
| 56 | if(z==(float)0.0&&z!=x) { | |
| 57 | /* scalbf underflow */ | |
| 58 | return (float)__kernel_standard((double)x,(double)fn,133); | |
| c4029823 | 59 | } |
| f7eac6eb | 60 | #ifndef _SCALB_INT |
| c4029823 | 61 | if(!__finitef(fn)) __set_errno (ERANGE); |
| f7eac6eb RM |
62 | #endif |
| 63 | return z; | |
| c4029823 | 64 | #endif |
| f7eac6eb RM |
65 | } |
| 66 | weak_alias (__scalbf, scalbf) |