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  1. /* sf_copysign.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.  
  16. /*
  17.  * copysignf(float x, float y)
  18.  * copysignf(x,y) returns a value with the magnitude of x and
  19.  * with the sign bit of y.
  20.  */
  21.  
  22. #include "fdlibm.h"
  23.  
  24. #ifdef __STDC__
  25.         float copysignf(float x, float y)
  26. #else
  27.         float copysignf(x,y)
  28.         float x,y;
  29. #endif
  30. {
  31.         __uint32_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. }
  37.  
  38. #ifdef _DOUBLE_IS_32BITS
  39.  
  40. #ifdef __STDC__
  41.         double copysign(double x, double y)
  42. #else
  43.         double copysign(x,y)
  44.         double x,y;
  45. #endif
  46. {
  47.         return (double) copysignf((float) x, (float) y);
  48. }
  49.  
  50. #endif /* defined(_DOUBLE_IS_32BITS) */
  51.