lib/libm/src/s_copysignf.c

   1 /* s_copysignf.c -- float version of s_copysign.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  *
  15  * $NetBSD: s_copysignf.c,v 1.7 2002/05/26 22:01:54 wiz Exp $
  16  * $DragonFly: src/lib/libm/src/s_copysignf.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
  17  */
  18
  19 /*
  20  * copysignf(float x, float y)
  21  * copysignf(x,y) returns a value with the magnitude of x and
  22  * with the sign bit of y.
  23  */
  24
  25 #include <math.h>
  26 #include "math_private.h"
  27
  28 float
  29 copysignf(float x, float y)
  30 {
  31         u_int32_t ix,iy;
  32         GET_FLOAT_WORD(ix,x);
  33         GET_FLOAT_WORD(iy,y);
  34         SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000));
  35         return x;
  36 }