projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* @(#)s_copysign.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 | |
| cccda09f | 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: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $"; | |
| 15 | #endif | |
| 16 | ||
| 17 | /* | |
| 18 | * copysign(double x, double y) | |
| 19 | * copysign(x,y) returns a value with the magnitude of x and | |
| 20 | * with the sign bit of y. | |
| 21 | */ | |
| 22 | ||
| 23 | #include "math.h" | |
| 24 | #include "math_private.h" | |
| 25 | ||
| 26 | #ifdef __STDC__ | |
| 27 | double __copysign(double x, double y) | |
| 28 | #else | |
| 29 | double __copysign(x,y) | |
| 30 | double x,y; | |
| 31 | #endif | |
| 32 | { | |
| 33 | u_int32_t hx,hy; | |
| 34 | GET_HIGH_WORD(hx,x); | |
| 35 | GET_HIGH_WORD(hy,y); | |
| 36 | SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000)); | |
| 37 | return x; | |
| 38 | } | |
| 39 | weak_alias (__copysign, copysign) | |
| cccda09f UD |
40 | #ifdef NO_LONG_DOUBLE |
| 41 | strong_alias (__copysign, __copysignl) | |
| 42 | weak_alias (__copysign, copysignl) | |
| 43 | #endif |