include/sys/float_ieee754.h

   1 /*      $NetBSD: float_ieee754.h,v 1.8 2005/12/11 12:25:20 christos Exp $       */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)float.h     8.1 (Berkeley) 6/10/93
  32  */
  33
  34 /*
  35  * NOTICE: This is not a standalone file.  To use it, #include it in
  36  * your port's float.h header.
  37  */
  38
  39 #ifndef _SYS_FLOAT_IEEE754_H_
  40 #define _SYS_FLOAT_IEEE754_H_
  41
  42 #include <sys/cdefs.h>
  43 #include <sys/featuretest.h>
  44
  45 #ifndef FLT_ROUNDS
  46 __BEGIN_DECLS
  47 extern int __flt_rounds(void);
  48 __END_DECLS
  49 #define FLT_ROUNDS      __flt_rounds()
  50 #endif
  51
  52 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
  53     !defined(_XOPEN_SOURCE) || \
  54     ((__STDC_VERSION__ - 0) >= 199901L) || \
  55     ((_POSIX_C_SOURCE - 0) >= 200112L) || \
  56     ((_XOPEN_SOURCE  - 0) >= 600) || \
  57     defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
  58 #ifndef FLT_EVAL_METHOD
  59 #if __GNUC_PREREQ__(3, 3)
  60 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
  61 #endif /* GCC >= 3.3 */
  62 #endif /* defined(FLT_EVAL_METHOD) */
  63 #endif /* !defined(_ANSI_SOURCE) && ... */
  64
  65 #define FLT_RADIX       2               /* b */
  66
  67 #define FLT_MANT_DIG    24              /* p */
  68 #define FLT_EPSILON     1.19209290E-7F  /* b**(1-p) */
  69 #define FLT_DIG         6               /* floor((p-1)*log10(b))+(b == 10) */
  70 #define FLT_MIN_EXP     (-125)          /* emin */
  71 #define FLT_MIN         1.17549435E-38F /* b**(emin-1) */
  72 #define FLT_MIN_10_EXP  (-37)           /* ceil(log10(b**(emin-1))) */
  73 #define FLT_MAX_EXP     128             /* emax */
  74 #define FLT_MAX         3.40282347E+38F /* (1-b**(-p))*b**emax */
  75 #define FLT_MAX_10_EXP  38              /* floor(log10((1-b**(-p))*b**emax)) */
  76
  77 #define DBL_MANT_DIG    53
  78 #define DBL_EPSILON     2.2204460492503131E-16
  79 #define DBL_DIG         15
  80 #define DBL_MIN_EXP     (-1021)
  81 #define DBL_MIN         2.2250738585072014E-308
  82 #define DBL_MIN_10_EXP  (-307)
  83 #define DBL_MAX_EXP     1024
  84 #define DBL_MAX         1.7976931348623157E+308
  85 #define DBL_MAX_10_EXP  308
  86
  87 /*
  88  * If no extended-precision type is defined by the machine-dependent
  89  * header including this, default to `long double' being double-precision.
  90  */
  91 #ifndef LDBL_MANT_DIG
  92 #define LDBL_MANT_DIG   DBL_MANT_DIG
  93 #define LDBL_EPSILON    DBL_EPSILON
  94 #define LDBL_DIG        DBL_DIG
  95 #define LDBL_MIN_EXP    DBL_MIN_EXP
  96 #define LDBL_MIN        DBL_MIN
  97 #define LDBL_MIN_10_EXP DBL_MIN_10_EXP
  98 #define LDBL_MAX_EXP    DBL_MAX_EXP
  99 #define LDBL_MAX        DBL_MAX
 100 #define LDBL_MAX_10_EXP DBL_MAX_10_EXP
 101 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
 102     !defined(_XOPEN_SOURCE) || \
 103     ((__STDC_VERSION__ - 0) >= 199901L) || \
 104     ((_POSIX_C_SOURCE - 0) >= 200112L) || \
 105     ((_XOPEN_SOURCE  - 0) >= 600) || \
 106     defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
 107 #define DECIMAL_DIG     17              /* ceil((1+p*log10(b))-(b==10) */
 108 #endif /* !defined(_ANSI_SOURCE) && ... */
 109 #endif /* LDBL_MANT_DIG */
 110
 111 #endif  /* _SYS_FLOAT_IEEE754_H_ */