diff options
author | Pixel <pixel@nobis-crew.org> | 2011-02-05 11:06:07 -0800 |
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committer | Pixel <pixel@nobis-crew.org> | 2011-02-05 11:06:07 -0800 |
commit | 8b1fadd6a89f12cbc81c5d621a75b91dd9eedec2 (patch) | |
tree | 0b130b02101391e206c07cb0a1c9031bb4d27f21 /libm/src/w_scalb.c | |
parent | 4830af498e2d3a5440e65c63a3595b91f1cd4ac9 (diff) |
Adding Sun's fdlibm, and libnix's scanf, tweaked to become an xscanf. Adding a few more libc inlined also.
Diffstat (limited to 'libm/src/w_scalb.c')
-rw-r--r-- | libm/src/w_scalb.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libm/src/w_scalb.c b/libm/src/w_scalb.c new file mode 100644 index 0000000..bca5d51 --- /dev/null +++ b/libm/src/w_scalb.c @@ -0,0 +1,56 @@ + +/* @(#)w_scalb.c 1.3 95/01/18 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunSoft, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* + * wrapper scalb(double x, double fn) is provide for + * passing various standard test suite. One + * should use scalbn() instead. + */ + +#include "fdlibm.h" + +#include <errno.h> + +#ifdef __STDC__ +#ifdef _SCALB_INT + double scalb(double x, int fn) /* wrapper scalb */ +#else + double scalb(double x, double fn) /* wrapper scalb */ +#endif +#else + double scalb(x,fn) /* wrapper scalb */ +#ifdef _SCALB_INT + double x; int fn; +#else + double x,fn; +#endif +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_scalb(x,fn); +#else + double z; + z = __ieee754_scalb(x,fn); + if(_LIB_VERSION == _IEEE_) return z; + if(!(finite(z)||isnan(z))&&finite(x)) { + return __kernel_standard(x,(double)fn,32); /* scalb overflow */ + } + if(z==0.0&&z!=x) { + return __kernel_standard(x,(double)fn,33); /* scalb underflow */ + } +#ifndef _SCALB_INT + if(!finite(fn)) errno = ERANGE; +#endif + return z; +#endif +} |