Rev 2 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 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 |
||
| 8 | * software is freely granted, provided that this notice |
||
| 9 | * is preserved. |
||
| 10 | * ==================================================== |
||
| 11 | */ |
||
| 12 | |||
| 13 | #ifndef lint |
||
| 14 | static char rcsid[] = "$\Id: s_copysign.c,v 1.2.6.1 1997/02/23 11:03:16 joerg 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 __generic_copysign(double x, double y) |
||
| 28 | #else |
||
| 29 | double __generic_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 | } |