diff options
Diffstat (limited to 'math/w_sqrtf.c')
| -rw-r--r-- | math/w_sqrtf.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/math/w_sqrtf.c b/math/w_sqrtf.c new file mode 100644 index 0000000..21beb55 --- /dev/null +++ b/math/w_sqrtf.c @@ -0,0 +1,47 @@ +/* w_sqrtf.c -- float version of w_sqrt.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: w_sqrtf.c,v 1.3 1995/05/10 20:49:59 jtc Exp $"; +#endif + +/* + * wrapper sqrtf(x) + */ + +#include <math.h> +#include "math_private.h" + +#ifdef __STDC__ + float __sqrtf(float x) /* wrapper sqrtf */ +#else + float sqrt(x) /* wrapper sqrtf */ + float x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_sqrtf(x); +#else + float z; + z = __ieee754_sqrtf(x); + if(_LIB_VERSION == _IEEE_ || __isnanf(x)) return z; + if(x<(float)0.0) { + /* sqrtf(negative) */ + return (float)__kernel_standard((double)x,(double)x,126); + } else + return z; +#endif +} +weak_alias (__sqrtf, sqrtf) |