libjava/classpath/native/fdlibm/w_sqrt.c

   1
   2 /* @(#)w_sqrt.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  * wrapper sqrt(x)
  16  */
  17
  18 #include "fdlibm.h"
  19
  20 #ifdef __STDC__
  21         double sqrt(double x)           /* wrapper sqrt */
  22 #else
  23         double sqrt(x)                  /* wrapper sqrt */
  24         double x;
  25 #endif
  26 {
  27 #ifdef _IEEE_LIBM
  28         return __ieee754_sqrt(x);
  29 #else
  30         double z;
  31         z = __ieee754_sqrt(x);
  32         if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
  33         if(x<0.0) {
  34             return __kernel_standard(x,x,26); /* sqrt(negative) */
  35         } else
  36             return z;
  37 #endif
  38 }