The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/float.h

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    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: releng/8.4/sys/i386/include/float.h 199583 2009-11-20 15:27:52Z jhb $
   31  */
   32 
   33 #ifndef _MACHINE_FLOAT_H_
   34 #define _MACHINE_FLOAT_H_ 1
   35 
   36 #include <sys/cdefs.h>
   37 
   38 __BEGIN_DECLS
   39 extern 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   64
   70 #define LDBL_EPSILON    1.0842021724855044340E-19L
   71 #define LDBL_DIG        18
   72 #define LDBL_MIN_EXP    (-16381)
   73 #define LDBL_MIN        3.3621031431120935063E-4932L
   74 #define LDBL_MIN_10_EXP (-4931)
   75 #define LDBL_MAX_EXP    16384
   76 #define LDBL_MAX        1.1897314953572317650E+4932L
   77 #define LDBL_MAX_10_EXP 4932
   78 #endif /* _MACHINE_FLOAT_H_ */

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