163 lines
5.2 KiB
C
163 lines
5.2 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GCC is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GCC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* As a special exception, if you include this header file into source
|
|
files compiled by GCC, this header file does not by itself cause
|
|
the resulting executable to be covered by the GNU General Public
|
|
License. This exception does not however invalidate any other
|
|
reasons why the executable file might be covered by the GNU General
|
|
Public License. */
|
|
|
|
/*
|
|
* ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h>
|
|
*/
|
|
|
|
#ifndef _FLOAT_H___
|
|
#define _FLOAT_H___
|
|
|
|
/* Radix of exponent representation, b. */
|
|
#undef FLT_RADIX
|
|
#define FLT_RADIX __FLT_RADIX__
|
|
|
|
/* Number of base-FLT_RADIX digits in the significand, p. */
|
|
#undef FLT_MANT_DIG
|
|
#undef DBL_MANT_DIG
|
|
#undef LDBL_MANT_DIG
|
|
#define FLT_MANT_DIG __FLT_MANT_DIG__
|
|
#define DBL_MANT_DIG __DBL_MANT_DIG__
|
|
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
|
|
|
|
/* Number of decimal digits, q, such that any floating-point number with q
|
|
decimal digits can be rounded into a floating-point number with p radix b
|
|
digits and back again without change to the q decimal digits,
|
|
|
|
p * log10(b) if b is a power of 10
|
|
floor((p - 1) * log10(b)) otherwise
|
|
*/
|
|
#undef FLT_DIG
|
|
#undef DBL_DIG
|
|
#undef LDBL_DIG
|
|
#define FLT_DIG __FLT_DIG__
|
|
#define DBL_DIG __DBL_DIG__
|
|
#define LDBL_DIG __LDBL_DIG__
|
|
|
|
/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
|
|
#undef FLT_MIN_EXP
|
|
#undef DBL_MIN_EXP
|
|
#undef LDBL_MIN_EXP
|
|
#define FLT_MIN_EXP __FLT_MIN_EXP__
|
|
#define DBL_MIN_EXP __DBL_MIN_EXP__
|
|
#define LDBL_MIN_EXP __LDBL_MIN_EXP__
|
|
|
|
/* Minimum negative integer such that 10 raised to that power is in the
|
|
range of normalized floating-point numbers,
|
|
|
|
ceil(log10(b) * (emin - 1))
|
|
*/
|
|
#undef FLT_MIN_10_EXP
|
|
#undef DBL_MIN_10_EXP
|
|
#undef LDBL_MIN_10_EXP
|
|
#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
|
|
#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
|
|
#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
|
|
|
|
/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */
|
|
#undef FLT_MAX_EXP
|
|
#undef DBL_MAX_EXP
|
|
#undef LDBL_MAX_EXP
|
|
#define FLT_MAX_EXP __FLT_MAX_EXP__
|
|
#define DBL_MAX_EXP __DBL_MAX_EXP__
|
|
#define LDBL_MAX_EXP __LDBL_MAX_EXP__
|
|
|
|
/* Maximum integer such that 10 raised to that power is in the range of
|
|
representable finite floating-point numbers,
|
|
|
|
floor(log10((1 - b**-p) * b**emax))
|
|
*/
|
|
#undef FLT_MAX_10_EXP
|
|
#undef DBL_MAX_10_EXP
|
|
#undef LDBL_MAX_10_EXP
|
|
#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
|
|
#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
|
|
#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
|
|
|
|
/* Maximum representable finite floating-point number,
|
|
|
|
(1 - b**-p) * b**emax
|
|
*/
|
|
#undef FLT_MAX
|
|
#undef DBL_MAX
|
|
#undef LDBL_MAX
|
|
#define FLT_MAX __FLT_MAX__
|
|
#define DBL_MAX __DBL_MAX__
|
|
#define LDBL_MAX __LDBL_MAX__
|
|
|
|
/* The difference between 1 and the least value greater than 1 that is
|
|
representable in the given floating point type, b**1-p. */
|
|
#undef FLT_EPSILON
|
|
#undef DBL_EPSILON
|
|
#undef LDBL_EPSILON
|
|
#define FLT_EPSILON __FLT_EPSILON__
|
|
#define DBL_EPSILON __DBL_EPSILON__
|
|
#define LDBL_EPSILON __LDBL_EPSILON__
|
|
|
|
/* Minimum normalized positive floating-point number, b**(emin - 1). */
|
|
#undef FLT_MIN
|
|
#undef DBL_MIN
|
|
#undef LDBL_MIN
|
|
#define FLT_MIN __FLT_MIN__
|
|
#define DBL_MIN __DBL_MIN__
|
|
#define LDBL_MIN __LDBL_MIN__
|
|
|
|
/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */
|
|
/* ??? This is supposed to change with calls to fesetround in <fenv.h>. */
|
|
#undef FLT_ROUNDS
|
|
#define FLT_ROUNDS 1
|
|
|
|
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
|
|
/* The floating-point expression evaluation method.
|
|
-1 indeterminate
|
|
0 evaluate all operations and constants just to the range and
|
|
precision of the type
|
|
1 evaluate operations and constants of type float and double
|
|
to the range and precision of the double type, evaluate
|
|
long double operations and constants to the range and
|
|
precision of the long double type
|
|
2 evaluate all operations and constants to the range and
|
|
precision of the long double type
|
|
|
|
??? This ought to change with the setting of the fp control word;
|
|
the value provided by the compiler assumes the widest setting. */
|
|
#undef FLT_EVAL_METHOD
|
|
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
|
|
|
|
/* Number of decimal digits, n, such that any floating-point number in the
|
|
widest supported floating type with pmax radix b digits can be rounded
|
|
to a floating-point number with n decimal digits and back again without
|
|
change to the value,
|
|
|
|
pmax * log10(b) if b is a power of 10
|
|
ceil(1 + pmax * log10(b)) otherwise
|
|
*/
|
|
#undef DECIMAL_DIG
|
|
#define DECIMAL_DIG __DECIMAL_DIG__
|
|
|
|
#endif /* C99 */
|
|
#endif /* _FLOAT_H___ */
|