84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/* @(#)s_floor.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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#if 0
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__FBSDID("$FreeBSD: src/lib/msun/src/s_trunc.c,v 1.1 2004/06/20 09:25:43 das Exp $");
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#endif
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: s_trunc.c,v 1.4 2013/11/13 12:58:11 joerg Exp $");
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#endif
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/*
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* trunc(x)
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* Return x rounded toward 0 to integral value
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* Method:
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* Bit twiddling.
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* Exception:
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* Inexact flag raised if x not equal to trunc(x).
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*/
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#include "math.h"
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#include "math_private.h"
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#ifndef __HAVE_LONG_DOUBLE
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__strong_alias(_truncl, trunc)
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__weak_alias(truncl, trunc)
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#endif
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static const double huge = 1.0e300;
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double
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trunc(double x)
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{
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int32_t i0,i1,jj0;
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uint32_t i;
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EXTRACT_WORDS(i0,i1,x);
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jj0 = ((i0>>20)&0x7ff)-0x3ff;
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if(jj0<20) {
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if(jj0<0) { /* raise inexact if x != 0 */
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if(huge+x>0.0) {/* |x|<1, so return 0*sign(x) */
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i0 &= 0x80000000U;
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i1 = 0;
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}
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} else {
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i = (0x000fffff)>>jj0;
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if(((i0&i)|i1)==0) return x; /* x is integral */
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if(huge+x>0.0) { /* raise inexact flag */
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i0 &= (~i); i1=0;
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}
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}
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} else if (jj0>51) {
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if(jj0==0x400) return x+x; /* inf or NaN */
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else return x; /* x is integral */
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} else {
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i = ((u_int32_t)(0xffffffff))>>(jj0-20);
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if((i1&i)==0) return x; /* x is integral */
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if(huge+x>0.0) /* raise inexact flag */
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i1 &= (~i);
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}
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INSERT_WORDS(x,i0,i1);
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return x;
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}
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