Line data    Source code

       1             : 
       2             : /* @(#)s_copysign.c 1.3 95/01/18 */
       3             : /*
       4             :  * ====================================================
       5             :  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       6             :  *
       7             :  * Developed at SunSoft, a Sun Microsystems, Inc. business.
       8             :  * Permission to use, copy, modify, and distribute this
       9             :  * software is freely granted, provided that this notice 
      10             :  * is preserved.
      11             :  * ====================================================
      12             :  */
      13             : 
      14             : /*
      15             :  * copysign(double x, double y)
      16             :  * copysign(x,y) returns a value with the magnitude of x and
      17             :  * with the sign bit of y.
      18             :  */
      19             : 
      20             : #include "fdlibm.h"
      21             : 
      22             : #ifndef _DOUBLE_IS_32BITS
      23             : 
      24             : #ifdef __STDC__
      25           0 :         double copysign(double x, double y)
      26             : #else
      27             :         double copysign(x,y)
      28             :         double x,y;
      29             : #endif
      30             : {
      31             :         uint32_t hx, hy;
      32           0 :         GET_HIGH_WORD(hx, x);
      33           0 :         GET_HIGH_WORD(hy, y);
      34           0 :         SET_HIGH_WORD(x, (hx&0x7fffffff)|(hy&0x80000000));
      35           0 :         return x;
      36             : }
      37             : #endif /* _DOUBLE_IS_32BITS */