projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* @(#)w_scalb.c 5.1 93/09/24 */ |
| 2 | /* | |
| 3 | * ==================================================== | |
| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
| 5 | * | |
| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
| 7 | * Permission to use, copy, modify, and distribute this | |
| c4029823 | 8 | * software is freely granted, provided that this notice |
| f7eac6eb RM |
9 | * is preserved. |
| 10 | * ==================================================== | |
| 11 | */ | |
| 12 | ||
| 13 | #if defined(LIBM_SCCS) && !defined(lint) | |
| 14 | static char rcsid[] = "$NetBSD: w_scalb.c,v 1.6 1995/05/10 20:49:48 jtc Exp $"; | |
| 15 | #endif | |
| 16 | ||
| 17 | /* | |
| 18 | * wrapper scalb(double x, double fn) is provide for | |
| c4029823 | 19 | * passing various standard test suite. One |
| f7eac6eb RM |
20 | * should use scalbn() instead. |
| 21 | */ | |
| 22 | ||
| 23 | #include "math.h" | |
| 24 | #include "math_private.h" | |
| 25 | ||
| 26 | #include <errno.h> | |
| 27 | ||
| 28 | #ifdef __STDC__ | |
| 29 | #ifdef _SCALB_INT | |
| 30 | double __scalb(double x, int fn) /* wrapper scalb */ | |
| 31 | #else | |
| 32 | double __scalb(double x, double fn) /* wrapper scalb */ | |
| 33 | #endif | |
| 34 | #else | |
| 35 | double __scalb(x,fn) /* wrapper scalb */ | |
| 36 | #ifdef _SCALB_INT | |
| 37 | double x; int fn; | |
| 38 | #else | |
| 39 | double x,fn; | |
| 40 | #endif | |
| 41 | #endif | |
| 42 | { | |
| 43 | #ifdef _IEEE_LIBM | |
| 44 | return __ieee754_scalb(x,fn); | |
| 45 | #else | |
| 46 | double z; | |
| 47 | z = __ieee754_scalb(x,fn); | |
| 48 | if(_LIB_VERSION == _IEEE_) return z; | |
| 49 | if(!(__finite(z)||__isnan(z))&&__finite(x)) { | |
| 50 | return __kernel_standard(x,(double)fn,32); /* scalb overflow */ | |
| 51 | } | |
| 52 | if(z==0.0&&z!=x) { | |
| 53 | return __kernel_standard(x,(double)fn,33); /* scalb underflow */ | |
| c4029823 | 54 | } |
| f7eac6eb | 55 | #ifndef _SCALB_INT |
| c4029823 | 56 | if(!__finite(fn)) __set_errno (ERANGE); |
| f7eac6eb RM |
57 | #endif |
| 58 | return z; | |
| c4029823 | 59 | #endif |
| f7eac6eb RM |
60 | } |
| 61 | weak_alias (__scalb, scalb) |