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Annotation of gforth/32bit.h, revision 1.3

1.1       anton       1: /*
                      2:   This is a generic file for 32-bit machines with IEEE FP arithmetic (no VMS).
                      3:   It only supports indirect threading.
1.3     ! anton       4: 
        !             5:   Copyright (C) 1995 Free Software Foundation, Inc.
        !             6: 
        !             7:   This file is part of Gforth.
        !             8: 
        !             9:   Gforth is free software; you can redistribute it and/or
        !            10:   modify it under the terms of the GNU General Public License
        !            11:   as published by the Free Software Foundation; either version 2
        !            12:   of the License, or (at your option) any later version.
        !            13: 
        !            14:   This program is distributed in the hope that it will be useful,
        !            15:   but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17:   GNU General Public License for more details.
        !            18: 
        !            19:   You should have received a copy of the GNU General Public License
        !            20:   along with this program; if not, write to the Free Software
        !            21:   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
1.1       anton      22: */
                     23: 
                     24: /* Cell and UCell must be the same size as a pointer */
                     25: typedef long Cell;
                     26: typedef unsigned long UCell;
                     27: 
                     28: /* DCell and UDCell must be twice as large as Cell */
                     29: typedef long long DCell;
                     30: typedef unsigned long long UDCell;
                     31: 
                     32: /* define this if IEEE singles and doubles are available as C data types */
                     33: #define IEEE_FP
                     34: 
                     35: /* the IEEE types are used only for loading and storing */
                     36: /* the IEEE double precision type */
                     37: typedef double DFloat;
                     38: /* the IEEE single precision type */
                     39: typedef float SFloat;
                     40: 
1.2       anton      41: #ifndef USE_FTOS
                     42: #ifndef USE_NO_FTOS
                     43: /* keep top of FP stack in register. Since most processors have FP
                     44:    registers and they are hardly used in gforth, this is usually a
                     45:    good idea.  The 88100 has no separate FP regs, but many general
                     46:    purpose regs, so it should be ok */
                     47: #define USE_FTOS
                     48: #endif
                     49: #endif
                     50: /* I don't do the same for the data stack (i.e. USE_TOS), since this
                     51:    loses on processors with few registers. USE_TOS might be defined in
                     52:    the processor-specific files */
                     53: 
1.1       anton      54: #ifdef DIRECT_THREADED
                     55: /* If you want direct threading, write a .h file for your processor! */
                     56: /* We could put some stuff here that causes a compile error, but then
                     57:    we could not use this file in the other machine.h files */
                     58: #endif
                     59: