Annotation of gforth/engine/forth.h, revision 1.13
1.1 anton 1: /* common header file
2:
1.12 anton 3: Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.1 anton 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
1.13 ! anton 19: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1 anton 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:
1.6 jwilke 50: #include "machine.h"
1.1 anton 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: #if !defined(DIRECT_THREADED)
130: /* i.e. indirect threaded our doubly indirect threaded */
131: /* the direct threaded version is machine dependent and resides in machine.h */
132:
133: /* PFA gives the parameter field address corresponding to a cfa */
134: #define PFA(cfa) (((Cell *)cfa)+2)
135: /* PFA1 is a special version for use just after a NEXT1 */
136: #define PFA1(cfa) PFA(cfa)
137: /* CODE_ADDRESS is the address of the code jumped to through the code field */
138: #define CODE_ADDRESS(cfa) (*(Xt)(cfa))
139:
140: /* DOES_CODE is the Forth code does jumps to */
141: #if !defined(DOUBLY_INDIRECT)
142: # define DOES_CA (symbols[DODOES])
143: #else /* defined(DOUBLY_INDIRECT) */
144: # define DOES_CA ((Label)&symbols[DODOES])
145: #endif /* defined(DOUBLY_INDIRECT) */
146:
147:
148:
149: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
150: (Xt *)(_cfa[0]==DOES_CA ? _cfa[1] : NULL);})
151: #define DOES_CODE1(cfa) ((Xt *)(cfa[1]))
152: /* MAKE_CF creates an appropriate code field at the cfa;
153: ca is the code address */
154: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
155: /* make a code field for a defining-word-defined word */
156: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,DOES_CA); \
157: ((Cell *)cfa)[1] = (Cell)(does_code);})
158: /* the does handler resides between DOES> and the following Forth code */
159: /* not needed in indirect threaded code */
160: #if defined(DOUBLY_INDIRECT)
161: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr, ((Label)&symbols[DOESJUMP]))
162: #else /* !defined(DOUBLY_INDIRECT) */
163: #define MAKE_DOES_HANDLER(addr) 0
164: #endif /* !defined(DOUBLY_INDIRECT) */
165: #endif /* !defined(DIRECT_THREADED) */
166:
167: #ifdef DEBUG
168: # define NAME(string) fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
169: #else
170: # define NAME(string)
171: #endif
172:
173: #define CF(const) (-const-2)
174:
175: #define CF_NIL -1
176:
177: #ifndef FLUSH_ICACHE
178: #warning flush-icache probably will not work (see manual)
179: # define FLUSH_ICACHE(addr,size)
180: #endif
181:
182: #if defined(DIRECT_THREADED)
183: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
184: #else
185: #define CACHE_FLUSH(addr,size)
186: #endif
187:
188: #ifdef USE_TOS
189: #define IF_TOS(x) x
190: #else
191: #define IF_TOS(x)
192: #define TOS (sp[0])
193: #endif
194:
195: #ifdef USE_FTOS
196: #define IF_FTOS(x) x
197: #else
198: #define IF_FTOS(x)
199: #define FTOS (fp[0])
200: #endif
201:
1.10 anton 202: typedef struct {
203: Address base; /* base address of image (0 if relocatable) */
204: UCell checksum; /* checksum of ca's to protect against some
205: incompatible binary/executable combinations
206: (0 if relocatable) */
207: UCell image_size; /* all sizes in bytes */
208: UCell dict_size;
209: UCell data_stack_size;
210: UCell fp_stack_size;
211: UCell return_stack_size;
212: UCell locals_stack_size;
213: Xt *boot_entry; /* initial ip for booting (in BOOT) */
214: Xt *throw_entry; /* ip after signal (in THROW) */
215: Cell unused1; /* possibly tib stack size */
216: Cell unused2;
217: Address data_stack_base; /* this and the following fields are initialized by the loader */
218: Address fp_stack_base;
219: Address return_stack_base;
220: Address locals_stack_base;
221: } ImageHeader;
222: /* the image-header is created in main.fs */
223:
1.1 anton 224: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
225: Address my_alloc(Cell size);
1.11 anton 226: char *tilde_cstr(Char *from, UCell size, int clear);
1.1 anton 227:
228: /* dblsub routines */
229: DCell dnegate(DCell d1);
230: UDCell ummul (UCell a, UCell b);
231: DCell mmul (Cell a, Cell b);
232: UDCell umdiv (UDCell u, UCell v);
233: DCell smdiv (DCell num, Cell denom);
234: DCell fmdiv (DCell num, Cell denom);
235:
1.7 pazsan 236: Cell memcasecmp(const Char *s1, const Char *s2, Cell n);
1.1 anton 237:
238: extern int offset_image;
1.5 anton 239: extern int die_on_signal;
1.10 anton 240: extern UCell pagesize;
241: extern ImageHeader *gforth_header;
1.2 pazsan 242:
1.9 anton 243: #ifdef GFORTH_DEBUGGING
244: extern Xt *ip;
245: extern Cell *rp;
246: #endif
247:
248:
1.2 pazsan 249: /* declare all the functions that are missing */
250: #ifndef HAVE_ATANH
251: extern double atanh(double r1);
252: extern double asinh(double r1);
253: extern double acosh(double r1);
254: #endif
255: #ifndef HAVE_ECVT
1.4 anton 256: /* extern char* ecvt(double x, int len, int* exp, int* sign);*/
1.2 pazsan 257: #endif
258: #ifndef HAVE_MEMMOVE
1.3 anton 259: /* extern char *memmove(char *dest, const char *src, long n); */
1.2 pazsan 260: #endif
261: #ifndef HAVE_POW10
262: extern double pow10(double x);
263: #endif
264: #ifndef HAVE_STRERROR
265: extern char *strerror(int err);
266: #endif
267: #ifndef HAVE_STRSIGNAL
268: extern char *strsignal(int sig);
269: #endif
270: #ifndef HAVE_STRTOUL
1.3 anton 271: extern unsigned long int strtoul(const char *nptr, char **endptr, int base);
1.2 pazsan 272: #endif
273:
274:
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