Annotation of gforth/forth.h, revision 1.28
1.19 anton 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.
1.1 anton 20: */
21:
1.21 anton 22: #include "config.h"
1.28 ! anton 23:
! 24: #if defined(DOUBLY_INDIRECT)
! 25: # undef DIRECT_THREADED
! 26: # define INDIRECT_THREADED
! 27: #endif
! 28:
1.21 anton 29: #include <limits.h>
1.28 ! anton 30:
1.26 pazsan 31: #if defined(NeXT)
32: # include <libc.h>
33: #endif /* NeXT */
1.21 anton 34:
1.28 ! anton 35: #if defined(DOUBLY_INDIRECT)
! 36: typedef void **Label;
! 37: #else /* !defined(DOUBLY_INDIRECT) */
1.1 anton 38: typedef void *Label;
1.28 ! anton 39: #endif /* !defined(DOUBLY_INDIRECT) */
1.1 anton 40:
1.2 pazsan 41: /* symbol indexed constants */
42:
43: #define DOCOL 0
44: #define DOCON 1
45: #define DOVAR 2
46: #define DOUSER 3
1.8 anton 47: #define DODEFER 4
1.16 anton 48: #define DOFIELD 5
1.14 pazsan 49: #define DODOES 6
50: #define DOESJUMP 7
1.6 benschop 51:
1.28 ! anton 52: /* the size of the DOESJUMP, which resides between DOES> and the does-code */
! 53: #define DOES_HANDLER_SIZE (2*sizeof(Cell))
! 54:
1.1 anton 55: #include "machine.h"
56:
57: /* Forth data types */
1.21 anton 58: /* Cell and UCell must be the same size as a pointer */
59: typedef CELL_TYPE Cell;
60: typedef unsigned CELL_TYPE UCell;
61: #define CELL_BITS (sizeof(Cell) * CHAR_BIT)
1.20 pazsan 62: typedef Cell Bool;
1.1 anton 63: #define FLAG(b) (-(b))
1.5 pazsan 64: #define FILEIO(error) (FLAG(error) & -37)
65: #define FILEEXIST(error) (FLAG(error) & -38)
1.1 anton 66:
67: #define F_TRUE (FLAG(0==0))
68: #define F_FALSE (FLAG(0!=0))
69:
70: typedef unsigned char Char;
71: typedef double Float;
72: typedef char *Address;
73:
1.21 anton 74: #ifdef BUGGY_LONG_LONG
75: typedef struct {
76: Cell hi;
77: UCell lo;
78: } DCell;
79:
80: typedef struct {
81: UCell hi;
82: UCell lo;
83: } UDCell;
84:
85: #define FETCH_DCELL(d,lo,hi) ((d)=(typeof(d)){(hi),(lo)})
86: #define STORE_DCELL(d,low,high) ({ \
87: typeof(d) _d = (d); \
88: (low) = _d.lo; \
89: (high)= _d.hi; \
90: })
91:
92: #define LONG2UD(l) ({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
93: #define UD2LONG(ud) ((long)(ud.lo))
94: #define DZERO ((DCell){0,0})
95:
96: #else /* ! defined(BUGGY_LONG_LONG) */
97:
98: /* DCell and UDCell must be twice as large as Cell */
99: typedef DOUBLE_CELL_TYPE DCell;
100: typedef unsigned DOUBLE_CELL_TYPE UDCell;
101:
102: typedef union {
103: struct {
104: #ifdef WORDS_BIGENDIAN
105: Cell high;
106: UCell low;
107: #else
108: UCell low;
109: Cell high;
110: #endif;
111: } cells;
112: DCell dcell;
113: } Double_Store;
114:
115: #define FETCH_DCELL(d,lo,hi) ({ \
116: Double_Store _d; \
117: _d.cells.low = (lo); \
118: _d.cells.high = (hi); \
119: (d) = _d.dcell; \
120: })
121:
122: #define STORE_DCELL(d,lo,hi) ({ \
123: Double_Store _d; \
124: _d.dcell = (d); \
125: (lo) = _d.cells.low; \
126: (hi) = _d.cells.high; \
127: })
128:
129: #define LONG2UD(l) ((UDCell)(l))
130: #define UD2LONG(ud) ((long)(ud))
131: #define DZERO ((DCell)0)
132:
133: #endif /* ! defined(BUGGY_LONG_LONG) */
134:
1.1 anton 135: #ifdef DIRECT_THREADED
136: typedef Label Xt;
137: #else
138: typedef Label *Xt;
139: #endif
140:
1.28 ! anton 141:
! 142: #if !defined(DIRECT_THREADED)
! 143: /* i.e. indirect threaded our doubly indirect threaded */
1.1 anton 144: /* the direct threaded version is machine dependent and resides in machine.h */
145:
146: /* PFA gives the parameter field address corresponding to a cfa */
147: #define PFA(cfa) (((Cell *)cfa)+2)
148: /* PFA1 is a special version for use just after a NEXT1 */
149: #define PFA1(cfa) PFA(cfa)
150: /* CODE_ADDRESS is the address of the code jumped to through the code field */
1.28 ! anton 151: #define CODE_ADDRESS(cfa) (*(Xt)(cfa))
! 152:
1.25 anton 153: /* DOES_CODE is the Forth code does jumps to */
1.28 ! anton 154: #if !defined(DOUBLY_INDIRECT)
! 155: # define DOES_CA (symbols[DODOES])
! 156: #else /* defined(DOUBLY_INDIRECT) */
! 157: # define DOES_CA ((Label)&symbols[DODOES])
! 158: #endif /* defined(DOUBLY_INDIRECT) */
! 159:
! 160:
! 161:
1.24 anton 162: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
1.28 ! anton 163: (Xt *)(_cfa[0]==DOES_CA ? _cfa[1] : NULL);})
! 164: #define DOES_CODE1(cfa) ((Xt *)(cfa[1]))
1.1 anton 165: /* MAKE_CF creates an appropriate code field at the cfa;
166: ca is the code address */
167: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
168: /* make a code field for a defining-word-defined word */
1.28 ! anton 169: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,DOES_CA); \
! 170: ((Cell *)cfa)[1] = (Cell)(does_code);})
1.1 anton 171: /* the does handler resides between DOES> and the following Forth code */
1.28 ! anton 172: /* not needed in indirect threaded code */
! 173: #if defined(DOUBLY_INDIRECT)
! 174: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr, ((Label)&symbols[DOESJUMP]))
! 175: #else /* !defined(DOUBLY_INDIRECT) */
! 176: #define MAKE_DOES_HANDLER(addr) 0
! 177: #endif /* !defined(DOUBLY_INDIRECT) */
1.21 anton 178: #endif /* !defined(DIRECT_THREADED) */
1.1 anton 179:
180: #ifdef DEBUG
1.18 pazsan 181: # define NAME(string) fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
1.1 anton 182: #else
183: # define NAME(string)
184: #endif
1.2 pazsan 185:
186: #define CF(const) (-const-2)
187:
188: #define CF_NIL -1
1.3 pazsan 189:
1.15 anton 190: #ifndef FLUSH_ICACHE
1.16 anton 191: #warning flush-icache probably will not work (see manual)
1.17 pazsan 192: # define FLUSH_ICACHE(addr,size)
1.15 anton 193: #endif
194:
1.28 ! anton 195: #if defined(DIRECT_THREADED)
1.15 anton 196: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
197: #else
1.17 pazsan 198: #define CACHE_FLUSH(addr,size)
1.3 pazsan 199: #endif
1.21 anton 200:
1.27 anton 201: #ifdef USE_TOS
202: #define IF_TOS(x) x
203: #else
204: #define IF_TOS(x)
205: #define TOS (sp[0])
206: #endif
207:
208: #ifdef USE_FTOS
209: #define IF_FTOS(x) x
210: #else
211: #define IF_FTOS(x)
212: #define FTOS (fp[0])
213: #endif
214:
1.21 anton 215: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
1.28 ! anton 216: Address my_alloc(Cell size);
1.21 anton 217:
218: /* dblsub routines */
219: DCell dnegate(DCell d1);
220: UDCell ummul (UCell a, UCell b);
221: DCell mmul (Cell a, Cell b);
222: UDCell umdiv (UDCell u, UCell v);
223: DCell smdiv (DCell num, Cell denom);
224: DCell fmdiv (DCell num, Cell denom);
225:
1.22 anton 226: int memcasecmp(const char *s1, const char *s2, long n);
227:
1.28 ! anton 228: extern int offset_image;
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