a0ee07829a
This brings us up to date with FreeBSD HEAD, fixes various bugs, unifies the set of functions we support on ARM, MIPS, and x86, fixes "long double", adds ISO C99 support, and adds basic unit tests. It turns out that our "long double" functions have always been broken for non-normal numbers. This patch fixes that by not using the upstream implementations and just forwarding to the regular "double" implementation instead (since "long double" on Android is just "double" anyway, which is what BSD doesn't support). All the tests pass on ARM, MIPS, and x86, plus glibc on x86-64. Bug: 3169850 Bug: 8012787 Bug: https://code.google.com/p/android/issues/detail?id=6697 Change-Id: If0c343030959c24bfc50d4d21c9530052c581837
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/*-
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* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
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* Copyright (c) 2002 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/lib/libc/include/fpmath.h,v 1.3 2005/02/06 03:23:31 das Exp $
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*/
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#include <endian.h>
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#include "_fpmath.h"
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union IEEEf2bits {
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float f;
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struct {
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int man :23;
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unsigned int exp :8;
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unsigned int sign :1;
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#else /* _BIG_ENDIAN */
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unsigned int sign :1;
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unsigned int exp :8;
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unsigned int man :23;
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#endif
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} bits;
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};
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#define DBL_MANH_SIZE 20
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#define DBL_MANL_SIZE 32
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union IEEEd2bits {
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double d;
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struct {
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/* #ifdef __ARMEB__ */
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#if (__BYTE_ORDER == __BIG_ENDIAN) || (defined(__arm__) && !defined(__VFP_FP__))
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unsigned int manh :20;
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unsigned int exp :11;
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unsigned int sign :1;
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unsigned int manl :32;
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int manl :32;
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unsigned int manh :20;
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unsigned int exp :11;
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unsigned int sign :1;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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unsigned int sign :1;
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unsigned int exp :11;
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unsigned int manh :20;
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unsigned int manl :32;
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#endif
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} bits;
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};
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/*
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* The BSD "long double" functions are broken when sizeof(long double) == sizeof(double).
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* Android works around those cases by replacing the broken functions with our own trivial stubs
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* that call the regular "double" function.
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*/
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#define __fpclassifyl __broken__fpclassify
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#define __isfinitel __broken__isfinitel
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#define __isinfl __broken__isinfl
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#define __isnanl __broken__isnanl
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#define __isnormall __broken__isnormall
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#define __signbitl __broken_signbitl
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