File:  [gforth] / gforth / Attic / forth.h
Revision 1.26: download - view: text, annotated - select for diffs
Sun Oct 13 19:56:21 1996 UTC (22 years, 9 months ago) by pazsan
Branches: MAIN
CVS tags: v0-2-1, v0-2-0, HEAD
Some fixes to run on Next

    1: /* common header file
    2: 
    3:   Copyright (C) 1995 Free Software Foundation, Inc.
    4: 
    5:   This file is part of Gforth.
    6: 
    7:   Gforth is free software; you can redistribute it and/or
    8:   modify it under the terms of the GNU General Public License
    9:   as published by the Free Software Foundation; either version 2
   10:   of the License, or (at your option) any later version.
   11: 
   12:   This program is distributed in the hope that it will be useful,
   13:   but WITHOUT ANY WARRANTY; without even the implied warranty of
   14:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15:   GNU General Public License for more details.
   16: 
   17:   You should have received a copy of the GNU General Public License
   18:   along with this program; if not, write to the Free Software
   19:   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20: */
   21: 
   22: #include "config.h"
   23: #include <limits.h>
   24: #if defined(NeXT)
   25: #  include <libc.h>
   26: #endif /* NeXT */
   27: 
   28: typedef void *Label;
   29: 
   30: /* symbol indexed constants */
   31: 
   32: #define DOCOL	0
   33: #define DOCON	1
   34: #define DOVAR	2
   35: #define DOUSER	3
   36: #define DODEFER	4
   37: #define DOFIELD	5
   38: #define DODOES	6
   39: #define DOESJUMP	7
   40: 
   41: #include "machine.h"
   42: 
   43: /* Forth data types */
   44: /* Cell and UCell must be the same size as a pointer */
   45: typedef CELL_TYPE Cell;
   46: typedef unsigned CELL_TYPE UCell;
   47: #define CELL_BITS	(sizeof(Cell) * CHAR_BIT)
   48: typedef Cell Bool;
   49: #define FLAG(b) (-(b))
   50: #define FILEIO(error)	(FLAG(error) & -37)
   51: #define FILEEXIST(error)	(FLAG(error) & -38)
   52: 
   53: #define F_TRUE (FLAG(0==0))
   54: #define F_FALSE (FLAG(0!=0))
   55: 
   56: typedef unsigned char Char;
   57: typedef double Float;
   58: typedef char *Address;
   59: 
   60: #ifdef BUGGY_LONG_LONG
   61: typedef struct {
   62:   Cell hi;
   63:   UCell lo;
   64: } DCell;
   65: 
   66: typedef struct {
   67:   UCell hi;
   68:   UCell lo;
   69: } UDCell;
   70: 
   71: #define FETCH_DCELL(d,lo,hi)	((d)=(typeof(d)){(hi),(lo)})
   72: #define STORE_DCELL(d,low,high)	({ \
   73: 				     typeof(d) _d = (d); \
   74: 				     (low) = _d.lo; \
   75: 				     (high)= _d.hi; \
   76: 				 })
   77: 
   78: #define LONG2UD(l)	({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
   79: #define UD2LONG(ud)	((long)(ud.lo))
   80: #define DZERO		((DCell){0,0})
   81: 
   82: #else /* ! defined(BUGGY_LONG_LONG) */
   83: 
   84: /* DCell and UDCell must be twice as large as Cell */
   85: typedef DOUBLE_CELL_TYPE DCell;
   86: typedef unsigned DOUBLE_CELL_TYPE UDCell;
   87: 
   88: typedef union {
   89:   struct {
   90: #ifdef WORDS_BIGENDIAN
   91:     Cell high;
   92:     UCell low;
   93: #else
   94:     UCell low;
   95:     Cell high;
   96: #endif;
   97:   } cells;
   98:   DCell dcell;
   99: } Double_Store;
  100: 
  101: #define FETCH_DCELL(d,lo,hi)	({ \
  102: 				     Double_Store _d; \
  103: 				     _d.cells.low = (lo); \
  104: 				     _d.cells.high = (hi); \
  105: 				     (d) = _d.dcell; \
  106: 				 })
  107: 
  108: #define STORE_DCELL(d,lo,hi)	({ \
  109: 				     Double_Store _d; \
  110: 				     _d.dcell = (d); \
  111: 				     (lo) = _d.cells.low; \
  112: 				     (hi) = _d.cells.high; \
  113: 				 })
  114: 
  115: #define LONG2UD(l)	((UDCell)(l))
  116: #define UD2LONG(ud)	((long)(ud))
  117: #define DZERO		((DCell)0)
  118: 
  119: #endif /* ! defined(BUGGY_LONG_LONG) */
  120: 
  121: #ifdef DIRECT_THREADED
  122: typedef Label Xt;
  123: #else
  124: typedef Label *Xt;
  125: #endif
  126: 
  127: #ifndef DIRECT_THREADED
  128: /* i.e. indirect threaded */
  129: /* the direct threaded version is machine dependent and resides in machine.h */
  130: 
  131: /* PFA gives the parameter field address corresponding to a cfa */
  132: #define PFA(cfa)	(((Cell *)cfa)+2)
  133: /* PFA1 is a special version for use just after a NEXT1 */
  134: #define PFA1(cfa)	PFA(cfa)
  135: /* CODE_ADDRESS is the address of the code jumped to through the code field */
  136: #define CODE_ADDRESS(cfa)	(*(Label *)(cfa))
  137: /* DOES_CODE is the Forth code does jumps to */
  138: #define DOES_CODE(cfa)	({Xt _cfa=(Xt)(cfa); \
  139: 			  _cfa[0] == symbols[DODOES] ? _cfa[1] : NULL;})
  140: #define DOES_CODE1(cfa)	(cfa[1])
  141: /* MAKE_CF creates an appropriate code field at the cfa;
  142:    ca is the code address */
  143: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
  144: /* make a code field for a defining-word-defined word */
  145: #define MAKE_DOES_CF(cfa,does_code)	({MAKE_CF(cfa,symbols[DODOES]);	\
  146: 					  ((Cell *)cfa)[1] = (Cell)does_code;})
  147: /* the does handler resides between DOES> and the following Forth code */
  148: #define DOES_HANDLER_SIZE	(2*sizeof(Cell))
  149: #define MAKE_DOES_HANDLER(addr)	0 /* do nothing */
  150: #endif /* !defined(DIRECT_THREADED) */
  151: 
  152: #ifdef DEBUG
  153: #	define	NAME(string)	fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
  154: #else
  155: #	define	NAME(string)
  156: #endif
  157: 
  158: #define CF(const)	(-const-2)
  159: 
  160: #define CF_NIL	-1
  161: 
  162: #ifndef FLUSH_ICACHE
  163: #warning flush-icache probably will not work (see manual)
  164: #	define FLUSH_ICACHE(addr,size)
  165: #endif
  166: 
  167: #ifdef DIRECT_THREADED
  168: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
  169: #else
  170: #define CACHE_FLUSH(addr,size)
  171: #endif
  172: 
  173: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
  174: 
  175: /* dblsub routines */
  176: DCell dnegate(DCell d1);
  177: UDCell ummul (UCell a, UCell b);
  178: DCell mmul (Cell a, Cell b);
  179: UDCell umdiv (UDCell u, UCell v);
  180: DCell smdiv (DCell num, Cell denom);
  181: DCell fmdiv (DCell num, Cell denom);
  182: 
  183: int memcasecmp(const char *s1, const char *s2, long n);
  184: 

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