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
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/* $NetBSD: floatdisf_ieee754.c,v 1.2 2013/08/24 00:51:48 matt Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: floatdisf_ieee754.c,v 1.2 2013/08/24 00:51:48 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#if defined(SOFTFLOAT) || defined(__ARM_EABI__)
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#include "softfloat/softfloat-for-gcc.h"
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#endif
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#include <limits.h>
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#include <machine/ieee.h>
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#include "quad.h"
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float __floatdisf(quad_t);
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/*
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* Convert signed quad to float.
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*/
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float
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__floatdisf(quad_t x)
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{
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union ieee_single_u ux = { .sngu_f = 0.0 };
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if (x == 0)
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return 0.0;
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if (x == 1)
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return 1.0;
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if (x < 0) {
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if (x == QUAD_MIN)
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return -0x1.0p63;
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ux.sngu_sign = 1;
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x = -x;
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}
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#if defined(_LP64) || defined(__mips_n32)
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u_int l = __builtin_clzll(x);
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x <<= (l + 1); /* clear implicit bit */
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ux.sngu_frac = (u_quad_t)x >> (64 - SNG_FRACBITS);
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#else
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union uu u = { .uq = x };
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uint32_t frac;
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u_int l;
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if (u.ul[H] == 0) {
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l = __builtin_clz(u.ul[L]);
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frac = u.ul[L] << (l + 1); /* clear implicit bit */
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l += 32;
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} else {
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l = __builtin_clz(u.ul[H]);
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frac = u.ul[H] << (l + 1); /* clear implicit bit */
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frac |= u.ul[L] >> (32 - (l + 1));
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}
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ux.sngu_frac = frac >> (32 - SNG_FRACBITS);
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#endif
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ux.sngu_exp = SNG_EXP_BIAS + 63 - l;
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return ux.sngu_f;
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}
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