StdLib/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/EfiCdefs.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 #ifndef FLT_EVAL_METHOD
  53 #if __GNUC_PREREQ__(3, 3)
  54 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
  55 #endif /* GCC >= 3.3 */
  56 #endif /* defined(FLT_EVAL_METHOD) */
  57
  58 #define FLT_RADIX 2   /* b */
  59
  60 #define FLT_MANT_DIG  24    /* p */
  61 #define FLT_EPSILON 1.19209290E-7F  /* b**(1-p) */
  62 #define FLT_DIG   6   /* floor((p-1)*log10(b))+(b == 10) */
  63 #define FLT_MIN_EXP (-125)    /* emin */
  64 #define FLT_MIN   1.17549435E-38F /* b**(emin-1) */
  65 #define FLT_MIN_10_EXP  (-37)   /* ceil(log10(b**(emin-1))) */
  66 #define FLT_MAX_EXP 128   /* emax */
  67 //#define FLT_MAX   3.40282347e+38F /* (1-b**(-p))*b**emax */
  68 #define FLT_MAX   3.402823e+38F /* (1-b**(-p))*b**emax */
  69 #define FLT_MAX_10_EXP  38    /* floor(log10((1-b**(-p))*b**emax)) */
  70
  71 #define DBL_MANT_DIG  53
  72 #define DBL_EPSILON 2.2204460492503131E-16
  73 #define DBL_DIG   15
  74 #define DBL_MIN_EXP (-1021)
  75 #define DBL_MIN   2.2250738585072014E-308
  76 #define DBL_MIN_10_EXP  (-307)
  77 #define DBL_MAX_EXP 1024
  78 #define DBL_MAX   1.7976931348623157E+308
  79 #define DBL_MAX_10_EXP  308
  80
  81 /*
  82  * If no extended-precision type is defined by the machine-dependent
  83  * header including this, default to `long double' being double-precision.
  84  */
  85 #ifndef LDBL_MANT_DIG
  86   #define LDBL_MANT_DIG     DBL_MANT_DIG
  87   #define LDBL_EPSILON      DBL_EPSILON
  88   #define LDBL_DIG          DBL_DIG
  89   #define LDBL_MIN_EXP      DBL_MIN_EXP
  90   #define LDBL_MIN          DBL_MIN
  91   #define LDBL_MIN_10_EXP   DBL_MIN_10_EXP
  92   #define LDBL_MAX_EXP      DBL_MAX_EXP
  93   #define LDBL_MAX          DBL_MAX
  94   #define LDBL_MAX_10_EXP   DBL_MAX_10_EXP
  95
  96   #define DECIMAL_DIG       17    /* ceil((1+p*log10(b))-(b==10) */
  97 #endif /* LDBL_MANT_DIG */
  98
  99 #endif  /* _SYS_FLOAT_IEEE754_H_ */