mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-13 03:29:50 +00:00
38 lines
873 B
C
38 lines
873 B
C
|
|
/* @(#)s_copysign.c 1.3 95/01/18 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunSoft, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
/*
|
|
* copysign(double x, double y)
|
|
* copysign(x,y) returns a value with the magnitude of x and
|
|
* with the sign bit of y.
|
|
*/
|
|
|
|
#include "fdlibm.h"
|
|
|
|
#ifndef _DOUBLE_IS_32BITS
|
|
|
|
#ifdef __STDC__
|
|
double copysign(double x, double y)
|
|
#else
|
|
double copysign(x,y)
|
|
double x,y;
|
|
#endif
|
|
{
|
|
uint32_t hx, hy;
|
|
GET_HIGH_WORD(hx, x);
|
|
GET_HIGH_WORD(hy, y);
|
|
SET_HIGH_WORD(x, (hx&0x7fffffff)|(hy&0x80000000));
|
|
return x;
|
|
}
|
|
#endif /* _DOUBLE_IS_32BITS */
|