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3f284b7fb8
- Since the 'long double' data type is not really supported by the GCC versions we use (and not supported by SAS/C either) building the library with support code for it is now a configurable option. Unless enabled, 'long double' is now treated like 'double'. - Reworked the HUGE_VAL definition which previously would default to Infinity. The new code properly defines this to the largest representable floating point number. The 'great' thing about the HUGE_VAL definition in this library is that it's a reference to a binary constant initialized by the library startup code. So any application checking for HUGE_VAL merely needs to be relinked rather than recompiled. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14703 87f5fb63-7c3d-0410-a384-fd976d0f7a62
84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/*
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* $Id: math_fp_support.h,v 1.2 2004-08-08 10:55:57 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
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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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*
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* - 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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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* 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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#ifndef _MATH_FP_SUPPORT_H
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#define _MATH_FP_SUPPORT_H
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/****************************************************************************/
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/* If any of the three supported floating point support flavours is
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enabled, make sure that the generic 'FLOATING_POINT_SUPPORT' symbol
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is defined, too.*/
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#if (defined(IEEE_FLOATING_POINT_SUPPORT) || defined(M68881_FLOATING_POINT_SUPPORT) || defined(PPC_FLOATING_POINT_SUPPORT))
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#define FLOATING_POINT_SUPPORT
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#endif /* IEEE_FLOATING_POINT_SUPPORT || M68881_FLOATING_POINT_SUPPORT || PPC_FLOATING_POINT_SUPPORT */
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/****************************************************************************/
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/* This selects whether or not the 'long double' type should be used. So far,
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only 'double' can be supported, and 'long double' defaults to 'double'. */
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/*#define USE_LONG_DOUBLE*/
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/****************************************************************************/
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#if defined(USE_LONG_DOUBLE)
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typedef long double __long_double_t;
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#else
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typedef double __long_double_t;
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#endif /* USE_LONG_DOUBLE */
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/****************************************************************************/
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/* 'Portable' raw representations of three IEEE floating point formats. */
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union ieee_long_double
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{
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long double value;
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unsigned long raw[3];
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};
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union ieee_double
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{
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double value;
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unsigned long raw[2];
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};
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union ieee_single
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{
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float value;
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unsigned long raw[1];
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};
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/****************************************************************************/
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#endif /* _MATH_FP_SUPPORT_H */
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