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:
24: #if defined(DOUBLY_INDIRECT)
25: # undef DIRECT_THREADED
26: # undef INDIRECT_THREADED
27: # define INDIRECT_THREADED
28: #endif
29:
30: #include <limits.h>
31:
32: #if defined(NeXT)
33: # include <libc.h>
34: #endif /* NeXT */
35:
36: #if defined(DOUBLY_INDIRECT)
37: typedef void **Label;
38: #else /* !defined(DOUBLY_INDIRECT) */
39: typedef void *Label;
40: #endif /* !defined(DOUBLY_INDIRECT) */
41:
42: /* symbol indexed constants */
43:
44: #define DOCOL 0
45: #define DOCON 1
46: #define DOVAR 2
47: #define DOUSER 3
48: #define DODEFER 4
49: #define DOFIELD 5
50: #define DODOES 6
51: #define DOESJUMP 7
52:
53: /* the size of the DOESJUMP, which resides between DOES> and the does-code */
54: #define DOES_HANDLER_SIZE (2*sizeof(Cell))
55:
56: #include "../machine/machine.h"
57:
58: /* Forth data types */
59: /* Cell and UCell must be the same size as a pointer */
60: typedef CELL_TYPE Cell;
61: typedef unsigned CELL_TYPE UCell;
62: #define CELL_BITS (sizeof(Cell) * CHAR_BIT)
63: typedef Cell Bool;
64: #define FLAG(b) (-(b))
65: #define FILEIO(error) (FLAG(error) & -37)
66: #define FILEEXIST(error) (FLAG(error) & -38)
67:
68: #define F_TRUE (FLAG(0==0))
69: #define F_FALSE (FLAG(0!=0))
70:
71: typedef unsigned char Char;
72: typedef double Float;
73: typedef char *Address;
74:
75: #ifdef BUGGY_LONG_LONG
76: typedef struct {
77: Cell hi;
78: UCell lo;
79: } DCell;
80:
81: typedef struct {
82: UCell hi;
83: UCell lo;
84: } UDCell;
85:
86: #define FETCH_DCELL(d,lo,hi) ((d)=(typeof(d)){(hi),(lo)})
87: #define STORE_DCELL(d,low,high) ({ \
88: typeof(d) _d = (d); \
89: (low) = _d.lo; \
90: (high)= _d.hi; \
91: })
92:
93: #define LONG2UD(l) ({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
94: #define UD2LONG(ud) ((long)(ud.lo))
95: #define DZERO ((DCell){0,0})
96:
97: #else /* ! defined(BUGGY_LONG_LONG) */
98:
99: /* DCell and UDCell must be twice as large as Cell */
100: typedef DOUBLE_CELL_TYPE DCell;
101: typedef unsigned DOUBLE_CELL_TYPE UDCell;
102:
103: typedef union {
104: struct {
105: #ifdef WORDS_BIGENDIAN
106: Cell high;
107: UCell low;
108: #else
109: UCell low;
110: Cell high;
111: #endif;
112: } cells;
113: DCell dcell;
114: } Double_Store;
115:
116: #define FETCH_DCELL(d,lo,hi) ({ \
117: Double_Store _d; \
118: _d.cells.low = (lo); \
119: _d.cells.high = (hi); \
120: (d) = _d.dcell; \
121: })
122:
123: #define STORE_DCELL(d,lo,hi) ({ \
124: Double_Store _d; \
125: _d.dcell = (d); \
126: (lo) = _d.cells.low; \
127: (hi) = _d.cells.high; \
128: })
129:
130: #define LONG2UD(l) ((UDCell)(l))
131: #define UD2LONG(ud) ((long)(ud))
132: #define DZERO ((DCell)0)
133:
134: #endif /* ! defined(BUGGY_LONG_LONG) */
135:
136: #ifdef DIRECT_THREADED
137: typedef Label Xt;
138: #else
139: typedef Label *Xt;
140: #endif
141:
142:
143: #if !defined(DIRECT_THREADED)
144: /* i.e. indirect threaded our doubly indirect threaded */
145: /* the direct threaded version is machine dependent and resides in machine.h */
146:
147: /* PFA gives the parameter field address corresponding to a cfa */
148: #define PFA(cfa) (((Cell *)cfa)+2)
149: /* PFA1 is a special version for use just after a NEXT1 */
150: #define PFA1(cfa) PFA(cfa)
151: /* CODE_ADDRESS is the address of the code jumped to through the code field */
152: #define CODE_ADDRESS(cfa) (*(Xt)(cfa))
153:
154: /* DOES_CODE is the Forth code does jumps to */
155: #if !defined(DOUBLY_INDIRECT)
156: # define DOES_CA (symbols[DODOES])
157: #else /* defined(DOUBLY_INDIRECT) */
158: # define DOES_CA ((Label)&symbols[DODOES])
159: #endif /* defined(DOUBLY_INDIRECT) */
160:
161:
162:
163: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
164: (Xt *)(_cfa[0]==DOES_CA ? _cfa[1] : NULL);})
165: #define DOES_CODE1(cfa) ((Xt *)(cfa[1]))
166: /* MAKE_CF creates an appropriate code field at the cfa;
167: ca is the code address */
168: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
169: /* make a code field for a defining-word-defined word */
170: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,DOES_CA); \
171: ((Cell *)cfa)[1] = (Cell)(does_code);})
172: /* the does handler resides between DOES> and the following Forth code */
173: /* not needed in indirect threaded code */
174: #if defined(DOUBLY_INDIRECT)
175: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr, ((Label)&symbols[DOESJUMP]))
176: #else /* !defined(DOUBLY_INDIRECT) */
177: #define MAKE_DOES_HANDLER(addr) 0
178: #endif /* !defined(DOUBLY_INDIRECT) */
179: #endif /* !defined(DIRECT_THREADED) */
180:
181: #ifdef DEBUG
182: # define NAME(string) fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
183: #else
184: # define NAME(string)
185: #endif
186:
187: #define CF(const) (-const-2)
188:
189: #define CF_NIL -1
190:
191: #ifndef FLUSH_ICACHE
192: #warning flush-icache probably will not work (see manual)
193: # define FLUSH_ICACHE(addr,size)
194: #endif
195:
196: #if defined(DIRECT_THREADED)
197: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
198: #else
199: #define CACHE_FLUSH(addr,size)
200: #endif
201:
202: #ifdef USE_TOS
203: #define IF_TOS(x) x
204: #else
205: #define IF_TOS(x)
206: #define TOS (sp[0])
207: #endif
208:
209: #ifdef USE_FTOS
210: #define IF_FTOS(x) x
211: #else
212: #define IF_FTOS(x)
213: #define FTOS (fp[0])
214: #endif
215:
216: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
217: Address my_alloc(Cell size);
218:
219: /* dblsub routines */
220: DCell dnegate(DCell d1);
221: UDCell ummul (UCell a, UCell b);
222: DCell mmul (Cell a, Cell b);
223: UDCell umdiv (UDCell u, UCell v);
224: DCell smdiv (DCell num, Cell denom);
225: DCell fmdiv (DCell num, Cell denom);
226:
227: int memcasecmp(const char *s1, const char *s2, long n);
228:
229: extern int offset_image;
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