diff options
Diffstat (limited to 's_frexp.c')
-rw-r--r-- | s_frexp.c | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/s_frexp.c b/s_frexp.c deleted file mode 100644 index 25b40cb..0000000 --- a/s_frexp.c +++ /dev/null @@ -1,56 +0,0 @@ - -/* @(#)s_frexp.c 1.4 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. - * ==================================================== - */ - -/* - * for non-zero x - * x = ieee_frexp(arg,&exp); - * return a double fp quantity x such that 0.5 <= |x| <1.0 - * and the corresponding binary exponent "exp". That is - * arg = x*2^exp. - * If arg is inf, 0.0, or NaN, then ieee_frexp(arg,&exp) returns arg - * with *exp=0. - */ - -#include "fdlibm.h" - -#ifdef __STDC__ -static const double -#else -static double -#endif -two54 = 1.80143985094819840000e+16; /* 0x43500000, 0x00000000 */ - -#ifdef __STDC__ - double ieee_frexp(double x, int *eptr) -#else - double ieee_frexp(x, eptr) - double x; int *eptr; -#endif -{ - int hx, ix, lx; - hx = __HI(x); - ix = 0x7fffffff&hx; - lx = __LO(x); - *eptr = 0; - if(ix>=0x7ff00000||((ix|lx)==0)) return x; /* 0,inf,nan */ - if (ix<0x00100000) { /* subnormal */ - x *= two54; - hx = __HI(x); - ix = hx&0x7fffffff; - *eptr = -54; - } - *eptr += (ix>>20)-1022; - hx = (hx&0x800fffff)|0x3fe00000; - __HI(x) = hx; - return x; -} |