Annotation of gforth/32bit.h, revision 1.4

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: /* define this if IEEE singles and doubles are available as C data types */
                     25: #define IEEE_FP
                     26: 
                     27: /* the IEEE types are used only for loading and storing */
                     28: /* the IEEE double precision type */
                     29: typedef double DFloat;
                     30: /* the IEEE single precision type */
                     31: typedef float SFloat;
                     32: 
1.2       anton      33: #ifndef USE_FTOS
                     34: #ifndef USE_NO_FTOS
                     35: /* keep top of FP stack in register. Since most processors have FP
                     36:    registers and they are hardly used in gforth, this is usually a
                     37:    good idea.  The 88100 has no separate FP regs, but many general
                     38:    purpose regs, so it should be ok */
                     39: #define USE_FTOS
                     40: #endif
                     41: #endif
                     42: /* I don't do the same for the data stack (i.e. USE_TOS), since this
                     43:    loses on processors with few registers. USE_TOS might be defined in
                     44:    the processor-specific files */
                     45: 
1.1       anton      46: #ifdef DIRECT_THREADED
                     47: /* If you want direct threading, write a .h file for your processor! */
                     48: /* We could put some stuff here that causes a compile error, but then
                     49:    we could not use this file in the other machine.h files */
                     50: #endif
                     51: 

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