1: /* common header file
2:
3: Copyright (C) 1995,1996,1997,1998 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: /* symbol indexed constants */
37:
38: #define DOCOL 0
39: #define DOCON 1
40: #define DOVAR 2
41: #define DOUSER 3
42: #define DODEFER 4
43: #define DOFIELD 5
44: #define DODOES 6
45: #define DOESJUMP 7
46:
47: /* the size of the DOESJUMP, which resides between DOES> and the does-code */
48: #define DOES_HANDLER_SIZE (2*sizeof(Cell))
49:
50: #include "machine.h"
51:
52: /* Forth data types */
53: /* Cell and UCell must be the same size as a pointer */
54: #define CELL_BITS (sizeof(Cell) * CHAR_BIT)
55: #define FLAG(b) (-(b))
56: #define FILEIO(error) (FLAG(error) & -37)
57: #define FILEEXIST(error) (FLAG(error) & -38)
58:
59: #define F_TRUE (FLAG(0==0))
60: #define F_FALSE (FLAG(0!=0))
61:
62: #ifdef BUGGY_LONG_LONG
63: typedef struct {
64: Cell hi;
65: UCell lo;
66: } DCell;
67:
68: typedef struct {
69: UCell hi;
70: UCell lo;
71: } UDCell;
72:
73: #define FETCH_DCELL(d,lo,hi) ((d)=(typeof(d)){(hi),(lo)})
74: #define STORE_DCELL(d,low,high) ({ \
75: typeof(d) _d = (d); \
76: (low) = _d.lo; \
77: (high)= _d.hi; \
78: })
79:
80: #define LONG2UD(l) ({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
81: #define UD2LONG(ud) ((long)(ud.lo))
82: #define DZERO ((DCell){0,0})
83:
84: #else /* ! defined(BUGGY_LONG_LONG) */
85:
86: /* DCell and UDCell must be twice as large as Cell */
87: typedef DOUBLE_CELL_TYPE DCell;
88: typedef unsigned DOUBLE_CELL_TYPE UDCell;
89:
90: typedef union {
91: struct {
92: #ifdef WORDS_BIGENDIAN
93: Cell high;
94: UCell low;
95: #else
96: UCell low;
97: Cell high;
98: #endif;
99: } cells;
100: DCell dcell;
101: } Double_Store;
102:
103: #define FETCH_DCELL(d,lo,hi) ({ \
104: Double_Store _d; \
105: _d.cells.low = (lo); \
106: _d.cells.high = (hi); \
107: (d) = _d.dcell; \
108: })
109:
110: #define STORE_DCELL(d,lo,hi) ({ \
111: Double_Store _d; \
112: _d.dcell = (d); \
113: (lo) = _d.cells.low; \
114: (hi) = _d.cells.high; \
115: })
116:
117: #define LONG2UD(l) ((UDCell)(l))
118: #define UD2LONG(ud) ((long)(ud))
119: #define DZERO ((DCell)0)
120:
121: #endif /* ! defined(BUGGY_LONG_LONG) */
122:
123: #ifdef DIRECT_THREADED
124: typedef Label Xt;
125: #else
126: typedef Label *Xt;
127: #endif
128:
129:
130: #if !defined(DIRECT_THREADED)
131: /* i.e. indirect threaded our doubly indirect threaded */
132: /* the direct threaded version is machine dependent and resides in machine.h */
133:
134: /* PFA gives the parameter field address corresponding to a cfa */
135: #define PFA(cfa) (((Cell *)cfa)+2)
136: /* PFA1 is a special version for use just after a NEXT1 */
137: #define PFA1(cfa) PFA(cfa)
138: /* CODE_ADDRESS is the address of the code jumped to through the code field */
139: #define CODE_ADDRESS(cfa) (*(Xt)(cfa))
140:
141: /* DOES_CODE is the Forth code does jumps to */
142: #if !defined(DOUBLY_INDIRECT)
143: # define DOES_CA (symbols[DODOES])
144: #else /* defined(DOUBLY_INDIRECT) */
145: # define DOES_CA ((Label)&symbols[DODOES])
146: #endif /* defined(DOUBLY_INDIRECT) */
147:
148:
149:
150: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
151: (Xt *)(_cfa[0]==DOES_CA ? _cfa[1] : NULL);})
152: #define DOES_CODE1(cfa) ((Xt *)(cfa[1]))
153: /* MAKE_CF creates an appropriate code field at the cfa;
154: ca is the code address */
155: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
156: /* make a code field for a defining-word-defined word */
157: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,DOES_CA); \
158: ((Cell *)cfa)[1] = (Cell)(does_code);})
159: /* the does handler resides between DOES> and the following Forth code */
160: /* not needed in indirect threaded code */
161: #if defined(DOUBLY_INDIRECT)
162: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr, ((Label)&symbols[DOESJUMP]))
163: #else /* !defined(DOUBLY_INDIRECT) */
164: #define MAKE_DOES_HANDLER(addr) 0
165: #endif /* !defined(DOUBLY_INDIRECT) */
166: #endif /* !defined(DIRECT_THREADED) */
167:
168: #ifdef DEBUG
169: # define NAME(string) fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
170: #else
171: # define NAME(string)
172: #endif
173:
174: #define CF(const) (-const-2)
175:
176: #define CF_NIL -1
177:
178: #ifndef FLUSH_ICACHE
179: #warning flush-icache probably will not work (see manual)
180: # define FLUSH_ICACHE(addr,size)
181: #endif
182:
183: #if defined(DIRECT_THREADED)
184: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
185: #else
186: #define CACHE_FLUSH(addr,size)
187: #endif
188:
189: #ifdef USE_TOS
190: #define IF_TOS(x) x
191: #else
192: #define IF_TOS(x)
193: #define TOS (sp[0])
194: #endif
195:
196: #ifdef USE_FTOS
197: #define IF_FTOS(x) x
198: #else
199: #define IF_FTOS(x)
200: #define FTOS (fp[0])
201: #endif
202:
203: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
204: Address my_alloc(Cell size);
205:
206: /* dblsub routines */
207: DCell dnegate(DCell d1);
208: UDCell ummul (UCell a, UCell b);
209: DCell mmul (Cell a, Cell b);
210: UDCell umdiv (UDCell u, UCell v);
211: DCell smdiv (DCell num, Cell denom);
212: DCell fmdiv (DCell num, Cell denom);
213:
214: Cell memcasecmp(const Char *s1, const Char *s2, Cell n);
215:
216: extern int offset_image;
217: extern int die_on_signal;
218:
219: /* declare all the functions that are missing */
220: #ifndef HAVE_ATANH
221: extern double atanh(double r1);
222: extern double asinh(double r1);
223: extern double acosh(double r1);
224: #endif
225: #ifndef HAVE_ECVT
226: /* extern char* ecvt(double x, int len, int* exp, int* sign);*/
227: #endif
228: #ifndef HAVE_MEMMOVE
229: /* extern char *memmove(char *dest, const char *src, long n); */
230: #endif
231: #ifndef HAVE_POW10
232: extern double pow10(double x);
233: #endif
234: #ifndef HAVE_STRERROR
235: extern char *strerror(int err);
236: #endif
237: #ifndef HAVE_STRSIGNAL
238: extern char *strsignal(int sig);
239: #endif
240: #ifndef HAVE_STRTOUL
241: extern unsigned long int strtoul(const char *nptr, char **endptr, int base);
242: #endif
243:
244:
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