Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. /* wf_sqrt.c -- float version of w_sqrt.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.  * wrapper sqrtf(x)
  18.  */
  19.  
  20. #include "fdlibm.h"
  21. #include <errno.h>
  22.  
  23. #ifdef __STDC__
  24.         float sqrtf(float x)            /* wrapper sqrtf */
  25. #else
  26.         float sqrtf(x)                  /* wrapper sqrtf */
  27.         float x;
  28. #endif
  29. {
  30. #ifdef _IEEE_LIBM
  31.         return __ieee754_sqrtf(x);
  32. #else
  33.         float z;
  34.         struct exception exc;
  35.         z = __ieee754_sqrtf(x);
  36.         if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
  37.         if(x<(float)0.0) {
  38.             /* sqrtf(negative) */
  39.             exc.type = DOMAIN;
  40.             exc.name = "sqrtf";
  41.             exc.err = 0;
  42.             exc.arg1 = exc.arg2 = (double)x;
  43.             if (_LIB_VERSION == _SVID_)
  44.               exc.retval = 0.0;
  45.             else
  46.               exc.retval = 0.0/0.0;
  47.             if (_LIB_VERSION == _POSIX_)
  48.               errno = EDOM;
  49.             else if (!matherr(&exc)) {
  50.               errno = EDOM;
  51.             }
  52.             if (exc.err != 0)
  53.               errno = exc.err;
  54.             return (float)exc.retval;
  55.         } else
  56.             return z;
  57. #endif
  58. }
  59.  
  60. #ifdef _DOUBLE_IS_32BITS
  61.  
  62. #ifdef __STDC__
  63.         double sqrt(double x)
  64. #else
  65.         double sqrt(x)
  66.         double x;
  67. #endif
  68. {
  69.         return (double) sqrtf((float) x);
  70. }
  71.  
  72. #endif /* defined(_DOUBLE_IS_32BITS) */
  73.