diff options
author | Ulrich Drepper <drepper@redhat.com> | 1999-07-14 00:54:57 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1999-07-14 00:54:57 +0000 |
commit | abfbdde177c3a7155070dda1b2cdc8292054cc26 (patch) | |
tree | e021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/libm-ieee754/s_scalbn.c | |
parent | 86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff) | |
download | glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.gz glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.xz glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.zip |
Update.
Diffstat (limited to 'sysdeps/libm-ieee754/s_scalbn.c')
-rw-r--r-- | sysdeps/libm-ieee754/s_scalbn.c | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/sysdeps/libm-ieee754/s_scalbn.c b/sysdeps/libm-ieee754/s_scalbn.c deleted file mode 100644 index 3dbfe8fef0..0000000000 --- a/sysdeps/libm-ieee754/s_scalbn.c +++ /dev/null @@ -1,70 +0,0 @@ -/* @(#)s_scalbn.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. - * ==================================================== - */ - -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: s_scalbn.c,v 1.8 1995/05/10 20:48:08 jtc Exp $"; -#endif - -/* - * scalbn (double x, int n) - * scalbn(x,n) returns x* 2**n computed by exponent - * manipulation rather than by actually performing an - * exponentiation or a multiplication. - */ - -#include "math.h" -#include "math_private.h" - -#ifdef __STDC__ -static const double -#else -static double -#endif -two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ -twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ -huge = 1.0e+300, -tiny = 1.0e-300; - -#ifdef __STDC__ - double __scalbn (double x, int n) -#else - double __scalbn (x,n) - double x; int n; -#endif -{ - int32_t k,hx,lx; - EXTRACT_WORDS(hx,lx,x); - k = (hx&0x7ff00000)>>20; /* extract exponent */ - if (k==0) { /* 0 or subnormal x */ - if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ - x *= two54; - GET_HIGH_WORD(hx,x); - k = ((hx&0x7ff00000)>>20) - 54; - } - if (k==0x7ff) return x+x; /* NaN or Inf */ - k = k+n; - if (n> 50000 || k > 0x7fe) - return huge*__copysign(huge,x); /* overflow */ - if (n< -50000) return tiny*__copysign(tiny,x); /*underflow*/ - if (k > 0) /* normal result */ - {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;} - if (k <= -54) - return tiny*__copysign(tiny,x); /*underflow*/ - k += 54; /* subnormal result */ - SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); - return x*twom54; -} -weak_alias (__scalbn, scalbn) -#ifdef NO_LONG_DOUBLE -strong_alias (__scalbn, __scalbnl) -weak_alias (__scalbn, scalbnl) -#endif |