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
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* s_scalbnf.c -- float version of s_scalbn.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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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 defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: s_scalbnf.c,v 1.12 2013/05/20 19:40:09 joerg Exp $");
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#endif
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#include "namespace.h"
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#include "math.h"
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#include "math_private.h"
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#ifndef _LP64
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__strong_alias(_scalbnf, _scalblnf)
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#endif
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__weak_alias(scalbnf, _scalbnf)
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__weak_alias(scalblnf, _scalblnf)
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__weak_alias(ldexpf, _scalbnf)
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static const float
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two25 = 0x1.0p25, /* 0x4c000000 */
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twom25 = 0x1.0p-25, /* 0x33000000 */
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huge = 1.0e+30,
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tiny = 1.0e-30;
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#ifdef _LP64
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float
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scalbnf(float x, int n)
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{
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return scalblnf(x, n);
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}
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#endif
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float
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scalblnf(float x, long n)
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{
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int32_t k,ix;
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GET_FLOAT_WORD(ix,x);
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k = (ix&0x7f800000)>>23; /* extract exponent */
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if (k==0) { /* 0 or subnormal x */
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if ((ix&0x7fffffff)==0) return x; /* +-0 */
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x *= two25;
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GET_FLOAT_WORD(ix,x);
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k = ((ix&0x7f800000)>>23) - 25;
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if (n< -50000) return tiny*x; /*underflow*/
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}
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if (k==0xff) return x+x; /* NaN or Inf */
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k = k+n;
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if (k > 0xfe) return huge*copysignf(huge,x); /* overflow */
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if (k > 0) /* normal result */
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{SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23)); return x;}
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if (k <= -25) {
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if (n > 50000) /* in case integer overflow in n+k */
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return huge*copysignf(huge,x); /*overflow*/
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else return tiny*copysignf(tiny,x); /*underflow*/
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}
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k += 25; /* subnormal result */
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SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
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return x*twom25;
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}
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