sdcc/device/include/float.h

   1 /*-------------------------------------------------------------------------
   2    float.h - ANSI functions forward declarations
   3
   4    Copyright (C) 1998, Sandeep Dutta . sandeep.dutta@usa.net
   5
   6    This library is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by the
   8    Free Software Foundation; either version 2, or (at your option) any
   9    later version.
  10
  11    This library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this library; see the file COPYING. If not, write to the
  18    Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
  19    MA 02110-1301, USA.
  20
  21    As a special exception, if you link this library with other files,
  22    some of which are compiled with SDCC, to produce an executable,
  23    this library does not by itself cause the resulting executable to
  24    be covered by the GNU General Public License. This exception does
  25    not however invalidate any other reasons why the executable file
  26    might be covered by the GNU General Public License.
  27 -------------------------------------------------------------------------*/
  28
  29 #ifndef __SDC51_FLOAT_H
  30 #define __SDC51_FLOAT_H 1
  31
  32 #include <limits.h>
  33
  34 #include <sdcc-lib.h>
  35
  36 #define FLT_RADIX       2
  37 #define FLT_MANT_DIG    24
  38 #define FLT_EPSILON     1.192092896E-07F
  39 #define FLT_DIG         6
  40 #define FLT_MIN_EXP     (-125)
  41 #define FLT_MIN         1.175494351E-38F
  42 #define FLT_MIN_10_EXP  (-37)
  43 #define FLT_MAX_EXP     (+128)
  44 #define FLT_MAX         3.402823466E+38F
  45 #define FLT_MAX_10_EXP  (+38)
  46 #if __STDC_VERSION__ >= 201112L
  47 #define FLT_DECIMAL_DIG 9
  48 #define FLT_TRUE_MIN    1.175494351E-38F
  49 #define FLT_HAS_SUBNORM 0
  50 #endif
  51
  52 #if __SIZEOF_DOUBLE__ == 4
  53
  54 #define DBL_MANT_DIG    FLT_MANT_DIG
  55 #define DBL_EPSILON     FLT_EPSILON
  56 #define DBL_DIG         FLT_DIG
  57 #define DBL_MIN_EXP     FLT_MIN_EXP
  58 #define DBL_MIN         FLT_MIN
  59 #define DBL_MIN_10_EXP  FLT_MIN_10_EXP
  60 #define DBL_MAX_EXP     FLT_MAX_EXP
  61 #define DBL_MAX         FLT_MAX
  62 #define DBL_MAX_10_EXP  FLT_MAX_10_EXP
  63 #if __STDC_VERSION__ >= 201112L
  64 #define DBL_DECIMAL_DIG FLT_DECIMAL_DIG
  65 #define DBL_TRUE_MIN    FLT_TRUE_MIN
  66 #define DBL_HAS_SUBNORM FLT_HAS_SUBNORM
  67 #endif
  68
  69 #endif
  70
  71 /* the following deal with IEEE single-precision numbers */
  72 #if defined(__SDCC_FLOAT_LIB)
  73 #define EXCESS          126
  74 #define SIGNBIT         ((unsigned long)0x80000000)
  75 #define __INFINITY      ((unsigned long)0x7F800000)
  76 #define __NAN       ((unsigned long)0xFFC00000)
  77 #define HIDDEN          (unsigned long)(1ul << 23)
  78 #define SIGN(fp)        (((unsigned long)(fp) >> (8*sizeof(fp)-1)) & 1)
  79 #define EXP(fp)         (((unsigned long)(fp) >> 23) & (unsigned int) 0x00FF)
  80 #define MANT(fp)        (((fp) & (unsigned long)0x00FFFFFF) | HIDDEN)
  81 #define NORM            0xff000000
  82 #define PACK(s,e,m)     ((s) | ((unsigned long)(e) << 23) | (m))
  83 #endif
  84
  85 #define __SDCC_FLOAT_NONBANKED __SDCC_NONBANKED
  86
  87 float __uchar2fs (unsigned char) __SDCC_FLOAT_NONBANKED;
  88 float __schar2fs (signed char) __SDCC_FLOAT_NONBANKED;
  89 float __uint2fs (unsigned int) __SDCC_FLOAT_NONBANKED;
  90 float __sint2fs (signed int) __SDCC_FLOAT_NONBANKED;
  91 float __ulong2fs (unsigned long) __SDCC_FLOAT_NONBANKED;
  92 float __slong2fs (signed long) __SDCC_FLOAT_NONBANKED;
  93 #ifdef __SDCC_LONGLONG
  94 float __ulonglong2fs (unsigned long long) __SDCC_FLOAT_NONBANKED;
  95 float __slonglong2fs (signed long long) __SDCC_FLOAT_NONBANKED;
  96 #endif
  97 unsigned char __fs2uchar (float) __SDCC_FLOAT_NONBANKED;
  98 signed char __fs2schar (float) __SDCC_FLOAT_NONBANKED;
  99 unsigned int __fs2uint (float) __SDCC_FLOAT_NONBANKED;
 100 signed int __fs2sint (float) __SDCC_FLOAT_NONBANKED;
 101 unsigned long __fs2ulong (float) __SDCC_FLOAT_NONBANKED;
 102 signed long __fs2slong (float) __SDCC_FLOAT_NONBANKED;
 103
 104 float __fsadd (float, float) __SDCC_FLOAT_NONBANKED;
 105 float __fssub (float, float) __SDCC_FLOAT_NONBANKED;
 106 float __fsmul (float, float) __SDCC_FLOAT_NONBANKED;
 107 float __fsdiv (float, float) __SDCC_FLOAT_NONBANKED;
 108
 109 _Bool __fslt (float, float) __SDCC_FLOAT_NONBANKED;
 110 _Bool __fseq (float, float) __SDCC_FLOAT_NONBANKED;
 111 _Bool __fsgt (float, float) __SDCC_FLOAT_NONBANKED;
 112
 113
 114 #if defined(__SDCC_FLOAT_LIB) && defined(__SDCC_mcs51) && !defined(__SDCC_USE_XSTACK) && !defined(_SDCC_NO_ASM_LIB_FUNCS)
 115
 116 #define FLOAT_ASM_MCS51
 117
 118 /* This adds extra code for proper round-off, in
 119    an attempt to match the results from gcc. */
 120 #define FLOAT_FULL_ACCURACY
 121
 122 /* This adds about 66 bytes to the code size and
 123    significantly speeds up shift operations more
 124    than 8 bits (common when subtracting numbers
 125    of significantly different magnitude and scaling
 126    to fixed point) */
 127 #define FLOAT_SHIFT_SPEEDUP
 128
 129 #define sign_a  psw.1
 130 #define sign_b  psw.5
 131 #define exp_a dpl
 132 #define exp_b dph
 133 #endif  /* using mcs51 assembly */
 134
 135
 136 #endif  /* __SDC51_FLOAT_H */
 137