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  1. /* sf_finite.c -- float version of s_finite.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.  * finitef(x) returns 1 is x is finite, else 0;
  18.  * no branching!
  19.  */
  20.  
  21. #include "fdlibm.h"
  22.  
  23. #ifdef __STDC__
  24.         int finitef(float x)
  25. #else
  26.         int finitef(x)
  27.         float x;
  28. #endif
  29. {
  30.         __int32_t ix;
  31.         GET_FLOAT_WORD(ix,x);
  32.         ix &= 0x7fffffff;
  33.         return (FLT_UWORD_IS_FINITE(ix));
  34. }
  35.  
  36. #ifdef _DOUBLE_IS_32BITS
  37.  
  38. #ifdef __STDC__
  39.         int finite(double x)
  40. #else
  41.         int finite(x)
  42.         double x;
  43. #endif
  44. {
  45.         return finitef((float) x);
  46. }
  47.  
  48. #endif /* defined(_DOUBLE_IS_32BITS) */
  49.