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.
! 7: This file is part of Gforth.
! 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.
! 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.
! 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: */
24: /* Cell and UCell must be the same size as a pointer */
25: typedef long Cell;
26: typedef unsigned long UCell;
28: /* DCell and UDCell must be twice as large as Cell */
29: typedef long long DCell;
30: typedef unsigned long long UDCell;
32: /* define this if IEEE singles and doubles are available as C data types */
33: #define IEEE_FP
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;
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
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 */
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 */