89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
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/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#if !defined _MATH_H && !defined _COMPLEX_H
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# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
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#endif
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/* FIXME! This file describes properties of the compiler, not the machine;
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it should not be part of libc!
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FIXME! This file does not deal with the -fshort-double option of
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gcc! */
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#if defined __USE_ISOC99 && defined _MATH_H
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# ifdef __GNUC__
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# if __STDC__ == 1
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/* In GNU or ANSI mode, gcc leaves `float' expressions as-is. */
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typedef float float_t; /* `float' expressions are evaluated as
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`float'. */
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typedef double double_t; /* `double' expressions are evaluated as
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`double'. */
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/* Signal that types stay as they were declared. */
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# define FLT_EVAL_METHOD 0
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/* Define `INFINITY' as value of type `float'. */
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# define INFINITY HUGE_VALF
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# else
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/* For `gcc -traditional', `float' expressions are evaluated as `double'. */
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typedef double float_t; /* `float' expressions are evaluated as
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`double'. */
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typedef double double_t; /* `double' expressions are evaluated as
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`double'. */
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/* Signal that both types are `double'. */
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# define FLT_EVAL_METHOD 1
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/* Define `INFINITY' as value of type `float'. */
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# define INFINITY HUGE_VALF
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# endif
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# else
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/* Wild guess at types for float_t and double_t. */
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typedef double float_t;
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typedef double double_t;
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/* Strange compiler, we don't know how it works. */
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# define FLT_EVAL_METHOD -1
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/* Define `INFINITY' as value of type `float'. */
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# define INFINITY HUGE_VALF
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# endif
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/* The values returned by `ilogb' for 0 and NaN respectively. */
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# define FP_ILOGB0 0x80000001
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# define FP_ILOGBNAN 0x7fffffff
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/* Number of decimal digits for the `double' type. */
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# define DECIMAL_DIG 15
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#endif /* ISO C99 */
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#ifndef __NO_LONG_DOUBLE_MATH
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/* Signal that we do not really have a `long double'. The disables the
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declaration of all the `long double' function variants. */
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# define __NO_LONG_DOUBLE_MATH 1
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#endif
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