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| Rev | Author | Line No. | Line |
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| 2 | pj | 1 | /* @(#)s_copysign.c 5.1 93/09/24 */ |
| 2 | /* |
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| 3 | * ==================================================== |
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| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 5 | * |
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| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 7 | * Permission to use, copy, modify, and distribute this |
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| 8 | * software is freely granted, provided that this notice |
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| 9 | * is preserved. |
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| 10 | * ==================================================== |
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| 11 | */ |
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| 12 | |||
| 13 | #ifndef lint |
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| 14 | static char rcsid[] = "$\Id: s_copysign.c,v 1.2.6.1 1997/02/23 11:03:16 joerg Exp $"; |
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| 15 | #endif |
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| 16 | |||
| 17 | /* |
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| 18 | * copysign(double x, double y) |
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| 19 | * copysign(x,y) returns a value with the magnitude of x and |
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| 20 | * with the sign bit of y. |
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| 21 | */ |
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| 22 | |||
| 23 | #include "math.h" |
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| 24 | #include "math_private.h" |
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| 25 | |||
| 26 | #ifdef __STDC__ |
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| 27 | double __generic_copysign(double x, double y) |
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| 28 | #else |
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| 29 | double __generic_copysign(x,y) |
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| 30 | double x,y; |
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| 31 | #endif |
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| 32 | { |
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| 33 | u_int32_t hx,hy; |
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| 34 | GET_HIGH_WORD(hx,x); |
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| 35 | GET_HIGH_WORD(hy,y); |
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| 36 | SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000)); |
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| 37 | return x; |
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| 38 | } |