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Diffstat (limited to 'lib/msun/src/w_sqrtf.c')
-rw-r--r-- | lib/msun/src/w_sqrtf.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/msun/src/w_sqrtf.c b/lib/msun/src/w_sqrtf.c new file mode 100644 index 0000000..c248f0c9 --- /dev/null +++ b/lib/msun/src/w_sqrtf.c @@ -0,0 +1,46 @@ +/* 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. + * ==================================================== + */ + +#ifndef lint +static char rcsid[] = "$Id: w_sqrtf.c,v 1.1 1994/08/10 20:35:53 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 +} |