StdLib/Include/sys/float_ieee754.h

   1 /** @file
   2     Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
   3     This program and the accompanying materials are licensed and made available under
   4     the terms and conditions of the BSD License that accompanies this distribution.
   5     The full text of the license may be found at
   6     http://opensource.org/licenses/bsd-license.
   7
   8     THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   9     WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  10
  11  * Copyright (c) 1992, 1993
  12  *  The Regents of the University of California.  All rights reserved.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *  @(#)float.h 8.1 (Berkeley) 6/10/93
  39     NetBSD: float_ieee754.h,v 1.8 2005/12/11 12:25:20 christos Exp
  40
  41  * NOTICE: This is not a standalone file.  To use it, #include it in
  42  * your port's float.h header.
  43 **/
  44
  45 #ifndef _SYS_FLOAT_IEEE754_H_
  46 #define _SYS_FLOAT_IEEE754_H_
  47
  48 #include <sys/EfiCdefs.h>
  49 #include <sys/featuretest.h>
  50
  51 #ifndef FLT_ROUNDS
  52 __BEGIN_DECLS
  53 extern int __flt_rounds(void);
  54 __END_DECLS
  55 #define FLT_ROUNDS  __flt_rounds()
  56 #endif
  57
  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
  64 #define FLT_RADIX 2   /* b */
  65
  66 #define FLT_MANT_DIG  24    /* p */
  67 #define FLT_EPSILON 1.19209290E-7F  /* b**(1-p) */
  68 #define FLT_DIG   6   /* floor((p-1)*log10(b))+(b == 10) */
  69 #define FLT_MIN_EXP (-125)    /* emin */
  70 #define FLT_MIN   1.17549435E-38F /* b**(emin-1) */
  71 #define FLT_MIN_10_EXP  (-37)   /* ceil(log10(b**(emin-1))) */
  72 #define FLT_MAX_EXP 128   /* emax */
  73 //#define FLT_MAX   3.40282347e+38F /* (1-b**(-p))*b**emax */
  74 #define FLT_MAX   3.402823e+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
 102   #define DECIMAL_DIG       17    /* ceil((1+p*log10(b))-(b==10) */
 103 #endif /* LDBL_MANT_DIG */
 104
 105 #endif  /* _SYS_FLOAT_IEEE754_H_ */