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Last change
on this file was 2006, checked in by bird, 20 years ago |
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Initial revision
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Property cvs2svn:cvs-rev
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1.1
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Property svn:eol-style
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native
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Property svn:executable
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*
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File size:
885 bytes
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| 1 | /* @(#)s_copysign.c 5.1 93/09/24 */
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| 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 |
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| 13 | #ifndef lint
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| 14 | static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_copysign.c,v 1.9 2003/07/23 04:53:46 peter Exp $";
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| 15 | #endif
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| 16 |
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| 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 |
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| 23 | #include "math.h"
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| 24 | #include "math_private.h"
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| 25 |
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| 26 | double
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| 27 | copysign(double x, double y)
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| 28 | {
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| 29 | u_int32_t hx,hy;
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| 30 | GET_HIGH_WORD(hx,x);
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| 31 | GET_HIGH_WORD(hy,y);
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| 32 | SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
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| 33 | return x;
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| 34 | }
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