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Diffstat (limited to 'libm/src/s_frexp.c')
-rw-r--r-- | libm/src/s_frexp.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/libm/src/s_frexp.c b/libm/src/s_frexp.c deleted file mode 100644 index d89e135..0000000 --- a/libm/src/s_frexp.c +++ /dev/null @@ -1,58 +0,0 @@ -/* @(#)s_frexp.c 5.1 93/09/24 */ -/* - * ==================================================== - * 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[] = "$FreeBSD: src/lib/msun/src/s_frexp.c,v 1.10 2005/03/07 21:27:37 das Exp $"; -#endif - -/* - * for non-zero x - * x = 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 frexp(arg,&exp) returns arg - * with *exp=0. - */ - -#include <sys/cdefs.h> -#include <float.h> - -#include "math.h" -#include "math_private.h" - -static const double -two54 = 1.80143985094819840000e+16; /* 0x43500000, 0x00000000 */ - -double -frexp(double x, int *eptr) -{ - int32_t hx, ix, lx; - EXTRACT_WORDS(hx,lx,x); - ix = 0x7fffffff&hx; - *eptr = 0; - if(ix>=0x7ff00000||((ix|lx)==0)) return x; /* 0,inf,nan */ - if (ix<0x00100000) { /* subnormal */ - x *= two54; - GET_HIGH_WORD(hx,x); - ix = hx&0x7fffffff; - *eptr = -54; - } - *eptr += (ix>>20)-1022; - hx = (hx&0x800fffff)|0x3fe00000; - SET_HIGH_WORD(x,hx); - return x; -} - -#if (LDBL_MANT_DIG == 53) -__weak_reference(frexp, frexpl); -#endif |