kolibrios/programs/develop/libraries/newlib/math/sf_copysign.c
Sergey Semyonov (Serge) 9ebd703865 newlib: new libm code
git-svn-id: svn://kolibrios.org@3362 a494cfbc-eb01-0410-851d-a64ba20cac60
2013-03-11 18:13:25 +00:00

51 lines
1.1 KiB
C

/* sf_copysign.c -- float version of s_copysign.c.
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
*/
/*
* ====================================================
* 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.
* ====================================================
*/
/*
* copysignf(float x, float y)
* copysignf(x,y) returns a value with the magnitude of x and
* with the sign bit of y.
*/
#include "fdlibm.h"
#ifdef __STDC__
float copysignf(float x, float y)
#else
float copysignf(x,y)
float x,y;
#endif
{
__uint32_t ix,iy;
GET_FLOAT_WORD(ix,x);
GET_FLOAT_WORD(iy,y);
SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000));
return x;
}
#ifdef _DOUBLE_IS_32BITS
#ifdef __STDC__
double copysign(double x, double y)
#else
double copysign(x,y)
double x,y;
#endif
{
return (double) copysignf((float) x, (float) y);
}
#endif /* defined(_DOUBLE_IS_32BITS) */