float.h revision 176825
1/*- 2 * Copyright (c) 1989 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: @(#)float.h 7.1 (Berkeley) 5/8/90 30 * $FreeBSD: head/sys/i386/include/float.h 176825 2008-03-05 11:11:53Z bde $ 31 */ 32 33#ifndef _MACHINE_FLOAT_H_ 34#define _MACHINE_FLOAT_H_ 1 35 36#include <sys/cdefs.h> 37 38__BEGIN_DECLS 39extern int __flt_rounds(void); 40__END_DECLS 41 42#define FLT_RADIX 2 /* b */ 43#define FLT_ROUNDS __flt_rounds() 44#if __ISO_C_VISIBLE >= 1999 45#define FLT_EVAL_METHOD (-1) /* i387 semantics are...interesting */ 46#define DECIMAL_DIG 21 /* max precision in decimal digits */ 47#endif 48 49#define FLT_MANT_DIG 24 /* p */ 50#define FLT_EPSILON 1.19209290E-07F /* b**(1-p) */ 51#define FLT_DIG 6 /* floor((p-1)*log10(b))+(b == 10) */ 52#define FLT_MIN_EXP (-125) /* emin */ 53#define FLT_MIN 1.17549435E-38F /* b**(emin-1) */ 54#define FLT_MIN_10_EXP (-37) /* ceil(log10(b**(emin-1))) */ 55#define FLT_MAX_EXP 128 /* emax */ 56#define FLT_MAX 3.40282347E+38F /* (1-b**(-p))*b**emax */ 57#define FLT_MAX_10_EXP 38 /* floor(log10((1-b**(-p))*b**emax)) */ 58 59#define DBL_MANT_DIG 53 60#define DBL_EPSILON 2.2204460492503131E-16 61#define DBL_DIG 15 62#define DBL_MIN_EXP (-1021) 63#define DBL_MIN 2.2250738585072014E-308 64#define DBL_MIN_10_EXP (-307) 65#define DBL_MAX_EXP 1024 66#define DBL_MAX 1.7976931348623157E+308 67#define DBL_MAX_10_EXP 308 68 69#define LDBL_MANT_DIG DBL_MANT_DIG 70#define LDBL_EPSILON DBL_EPSILON 71#define LDBL_DIG 18 72#define LDBL_MIN_EXP (-16381) 73#define LDBL_MIN 3.36210314311209350626E-4932L 74#define LDBL_MIN_10_EXP (-4931) 75#define LDBL_MAX_EXP 16384 76#define LDBL_MAX 1.18973149535723163300E+4932L 77#define LDBL_MAX_10_EXP 4932 78 79#endif /* _MACHINE_FLOAT_H_ */ 80