toolchain/gcc/newlib/libm/mathfp/s_signif.c

   1
   2 /* @(#)s_signif.c 5.1 93/09/24 */
   3 /*
   4  * ====================================================
   5  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   6  *
   7  * Developed at SunPro, 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  * significand(x) computes just
  16  *      scalb(x, (double) -ilogb(x)),
  17  * for exercising the fraction-part(F) IEEE 754-1985 test vector.
  18  */
  19
  20 #include "fdlibm.h"
  21
  22 #ifndef _DOUBLE_IS_32BITS
  23
  24 #ifdef __STDC__
  25         double significand(double x)
  26 #else
  27         double significand(x)
  28         double x;
  29 #endif
  30 {
  31         return scalb(x,(double) -ilogb(x));
  32 }
  33
  34 #endif /* _DOUBLE_IS_32BITS */