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/e_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/e_scalb.c')
-rw-r--r-- | libm/src/e_scalb.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libm/src/e_scalb.c b/libm/src/e_scalb.c new file mode 100644 index 0000000..91e9c6a --- /dev/null +++ b/libm/src/e_scalb.c @@ -0,0 +1,51 @@ + +/* @(#)e_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. + * ==================================================== + */ + +/* + * __ieee754_scalb(x, fn) is provide for + * passing various standard test suite. One + * should use scalbn() instead. + */ + +#include "fdlibm.h" + +#ifdef _SCALB_INT +#ifdef __STDC__ + double __ieee754_scalb(double x, int fn) +#else + double __ieee754_scalb(x,fn) + double x; int fn; +#endif +#else +#ifdef __STDC__ + double __ieee754_scalb(double x, double fn) +#else + double __ieee754_scalb(x,fn) + double x, fn; +#endif +#endif +{ +#ifdef _SCALB_INT + return scalbn(x,fn); +#else + if (isnan(x)||isnan(fn)) return x*fn; + if (!finite(fn)) { + if(fn>0.0) return x*fn; + else return x/(-fn); + } + if (rint(fn)!=fn) return (fn-fn)/(fn-fn); + if ( fn > 65000.0) return scalbn(x, 65000); + if (-fn > 65000.0) return scalbn(x,-65000); + return scalbn(x,(int)fn); +#endif +} |