diff options
Diffstat (limited to 'math/w_powl.c')
| -rw-r--r-- | math/w_powl.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/math/w_powl.c b/math/w_powl.c new file mode 100644 index 0000000000..d8be7b7b03 --- /dev/null +++ b/math/w_powl.c @@ -0,0 +1,68 @@ +/* w_powl.c -- long double version of w_pow.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@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. + * ==================================================== + */ + +/* + * wrapper powl(x,y) return x**y + */ + +#include <math.h> +#include "math_private.h" + + +#ifdef __STDC__ + long double __powl(long double x, long double y)/* wrapper powl */ +#else + long double __powl(x,y) /* wrapper powl */ + long double x,y; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_powl(x,y); +#else + long double z; + z=__ieee754_powl(x,y); + if(_LIB_VERSION == _IEEE_|| __isnanl(y)) return z; + if(__isnanl(x)) { + if(y==0.0) + return __kernel_standard(x,y,242); /* pow(NaN,0.0) */ + else + return z; + } + if(x==0.0) { + if(y==0.0) + return __kernel_standard(x,y,220); /* pow(0.0,0.0) */ + if(__finitel(y)&&y<0.0) { + if (signbit (x) && signbit (z)) + return __kernel_standard(x,y,223); /* pow(-0.0,negative) */ + else + return __kernel_standard(x,y,243); /* pow(+0.0,negative) */ + } + return z; + } + if(!__finitel(z)) { + if(__finitel(x)&&__finitel(y)) { + if(__isnanl(z)) + return __kernel_standard(x,y,224); /* pow neg**non-int */ + else + return __kernel_standard(x,y,221); /* pow overflow */ + } + } + if(z==0.0&&__finitel(x)&&__finitel(y)) + return __kernel_standard(x,y,222); /* pow underflow */ + return z; +#endif +} +weak_alias (__powl, powl) |