include/float.h

   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  * 3. 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/x86/include/float.h 235939 2012-05-24 21:44:46Z obrien $
  31  */
  32
  33 #ifndef _FLOAT_H_
  34 #define _FLOAT_H_
  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 #ifdef __LP64__
  46 #define FLT_EVAL_METHOD 0               /* no promotions */
  47 #else
  48 #define FLT_EVAL_METHOD (-1)            /* i387 semantics are...interesting */
  49 #endif
  50 #define DECIMAL_DIG     21              /* max precision in decimal digits */
  51 #endif
  52
  53 #define FLT_MANT_DIG    24              /* p */
  54 #define FLT_EPSILON     1.19209290E-07F /* b**(1-p) */
  55 #define FLT_DIG         6               /* floor((p-1)*log10(b))+(b == 10) */
  56 #define FLT_MIN_EXP     (-125)          /* emin */
  57 #define FLT_MIN         1.17549435E-38F /* b**(emin-1) */
  58 #define FLT_MIN_10_EXP  (-37)           /* ceil(log10(b**(emin-1))) */
  59 #define FLT_MAX_EXP     128             /* emax */
  60 #define FLT_MAX         3.40282347E+38F /* (1-b**(-p))*b**emax */
  61 #define FLT_MAX_10_EXP  38              /* floor(log10((1-b**(-p))*b**emax)) */
  62 #if __ISO_C_VISIBLE >= 2011
  63 #define FLT_TRUE_MIN    1.40129846E-45F /* b**(emin-p) */
  64 #define FLT_DECIMAL_DIG 9               /* ceil(1+p*log10(b)) */
  65 #define FLT_HAS_SUBNORM 1
  66 #endif /* __ISO_C_VISIBLE >= 2011 */
  67
  68 #define DBL_MANT_DIG    53
  69 #define DBL_EPSILON     2.2204460492503131E-16
  70 #define DBL_DIG         15
  71 #define DBL_MIN_EXP     (-1021)
  72 #define DBL_MIN         2.2250738585072014E-308
  73 #define DBL_MIN_10_EXP  (-307)
  74 #define DBL_MAX_EXP     1024
  75 #define DBL_MAX         1.7976931348623157E+308
  76 #define DBL_MAX_10_EXP  308
  77 #if __ISO_C_VISIBLE >= 2011
  78 #define DBL_TRUE_MIN    4.9406564584124654E-324
  79 #define DBL_DECIMAL_DIG 17
  80 #define DBL_HAS_SUBNORM 1
  81 #endif /* __ISO_C_VISIBLE >= 2011 */
  82
  83 #define LDBL_MANT_DIG   64
  84 #define LDBL_EPSILON    1.0842021724855044340E-19L
  85 #define LDBL_DIG        18
  86 #define LDBL_MIN_EXP    (-16381)
  87 #define LDBL_MIN        3.3621031431120935063E-4932L
  88 #define LDBL_MIN_10_EXP (-4931)
  89 #define LDBL_MAX_EXP    16384
  90 #define LDBL_MAX        1.1897314953572317650E+4932L
  91 #define LDBL_MAX_10_EXP 4932
  92 #if __ISO_C_VISIBLE >= 2011
  93 #define LDBL_TRUE_MIN   3.6451995318824746025E-4951L
  94 #define LDBL_DECIMAL_DIG 21
  95 #define LDBL_HAS_SUBNORM 1
  96 #endif /* __ISO_C_VISIBLE >= 2011 */
  97
  98 #endif /* _FLOAT_H_ */