mirror of
https://git.busybox.net/uClibc
synced 2025-10-14 01:32:00 +08:00
38b7304e93
1. static char rcsid[] = "$NetBSD: ..." 2. /* @(#)s_scalbn.c 5.1 93/09/24 */ 3. #ifdef __STDC__ No code changes (verified with objdump)
30 lines
751 B
C
30 lines
751 B
C
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, 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 "math.h"
|
|
#include "math_private.h"
|
|
|
|
double copysign(double x, double y)
|
|
{
|
|
u_int32_t hx,hy;
|
|
GET_HIGH_WORD(hx,x);
|
|
GET_HIGH_WORD(hy,y);
|
|
SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
|
|
return x;
|
|
}
|
|
libm_hidden_def(copysign)
|