toolchain/gcc/newlib/libm/common/sf_finite.c

   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) */