Home | History | Annotate | Line # | Download | only in src
w_sqrtf.c revision 1.5 
      1 /* w_sqrtf.c -- float version of w_sqrt.c.
      2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian (at) 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 #include <sys/cdefs.h>
     17 #if defined(LIBM_SCCS) && !defined(lint)
     18 __RCSID("$NetBSD: w_sqrtf.c,v 1.5 1999/07/02 15:37:45 simonb Exp $");
     19 #endif
     20 
     21 /*
     22  * wrapper sqrtf(x)
     23  */
     24 
     25 #include "math.h"
     26 #include "math_private.h"
     27 
     28 #ifdef __STDC__
     29 	float sqrtf(float x)		/* wrapper sqrtf */
     30 #else
     31 	float sqrt(x)			/* wrapper sqrtf */
     32 	float x;
     33 #endif
     34 {
     35 #ifdef _IEEE_LIBM
     36 	return __ieee754_sqrtf(x);
     37 #else
     38 	float z;
     39 	z = __ieee754_sqrtf(x);
     40 	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
     41 	if(x<(float)0.0) {
     42 	    /* sqrtf(negative) */
     43 	    return (float)__kernel_standard((double)x,(double)x,126);
     44 	} else
     45 	    return z;
     46 #endif
     47 }
     48