File:
[gforth] /
gforth /
engine /
engine.c
Revision
1.65:
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Wed Aug 20 09:23:46 2003 UTC (20 years, 8 months ago) by
anton
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MAIN
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Defined run-time routines (docol etc.) as primitives, eliminated some
special-casing and "+DOESJUMP+1" etc. in engine.c and main.c
Defined the enum type PrimNum and replaced many shorts with PrimNums
(gives nicer gdb output)
Workaround for the absence of the FPE_... macros in FreeBSD/Alpha 4_STABLE
1: /* Gforth virtual machine (aka inner interpreter)
2:
3: Copyright (C) 1995,1996,1997,1998,2000,2003 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20: */
21:
22: #include "config.h"
23: #include "forth.h"
24: #include <ctype.h>
25: #include <stdio.h>
26: #include <string.h>
27: #include <math.h>
28: #include <assert.h>
29: #include <stdlib.h>
30: #include <errno.h>
31: #include "io.h"
32: #include "threaded.h"
33: #ifndef STANDALONE
34: #include <sys/types.h>
35: #include <sys/stat.h>
36: #include <fcntl.h>
37: #include <time.h>
38: #include <sys/time.h>
39: #include <unistd.h>
40: #include <pwd.h>
41: #include <dirent.h>
42: #include <sys/resource.h>
43: #ifdef HAVE_FNMATCH_H
44: #include <fnmatch.h>
45: #else
46: #include "fnmatch.h"
47: #endif
48: #else
49: #include "systypes.h"
50: #endif
51:
52: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
53: #include <dlfcn.h>
54: #endif
55: #if defined(_WIN32)
56: #include <windows.h>
57: #endif
58: #ifdef hpux
59: #include <dl.h>
60: #endif
61:
62: #ifdef HAS_FFCALL
63: #include <avcall.h>
64: #include <callback.h>
65: #endif
66:
67: #ifndef SEEK_SET
68: /* should be defined in stdio.h, but some systems don't have it */
69: #define SEEK_SET 0
70: #endif
71:
72: #ifndef HAVE_FSEEKO
73: #define fseeko fseek
74: #endif
75:
76: #ifndef HAVE_FTELLO
77: #define ftello ftell
78: #endif
79:
80: #define NULLC '\0'
81:
82: #ifdef MEMCMP_AS_SUBROUTINE
83: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
84: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
85: #endif
86:
87: #define NEWLINE '\n'
88:
89: /* conversion on fetch */
90:
91: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
92: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
93: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
94: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
95: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
96: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
97: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
98: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
99: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
100: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
101: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
102: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
103: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
104: #define vm_Float2r(_float,_x) (_x=_float)
105:
106: /* conversion on store */
107:
108: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
109: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
110: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
111: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
112: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
113: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
114: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
115: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_r2Float(_x,_float) (_float=_x)
122:
123: #define vm_Cell2Cell(_x,_y) (_y=_x)
124:
125: #ifdef NO_IP
126: #define IMM_ARG(access,value) (VARIANT(value))
127: #else
128: #define IMM_ARG(access,value) (access)
129: #endif
130:
131: /* if machine.h has not defined explicit registers, define them as implicit */
132: #ifndef IPREG
133: #define IPREG
134: #endif
135: #ifndef SPREG
136: #define SPREG
137: #endif
138: #ifndef RPREG
139: #define RPREG
140: #endif
141: #ifndef FPREG
142: #define FPREG
143: #endif
144: #ifndef LPREG
145: #define LPREG
146: #endif
147: #ifndef CFAREG
148: #define CFAREG
149: #endif
150: #ifndef UPREG
151: #define UPREG
152: #endif
153: #ifndef TOSREG
154: #define TOSREG
155: #endif
156: #ifndef FTOSREG
157: #define FTOSREG
158: #endif
159:
160: #ifndef CPU_DEP1
161: # define CPU_DEP1 0
162: #endif
163:
164: /* instructions containing SUPER_END must be the last instruction of a
165: super-instruction (e.g., branches, EXECUTE, and other instructions
166: ending the basic block). Instructions containing SET_IP get this
167: automatically, so you usually don't have to write it. If you have
168: to write it, write it after IP points to the next instruction.
169: Used for profiling. Don't write it in a word containing SET_IP, or
170: the following block will be counted twice. */
171: #ifdef VM_PROFILING
172: #define SUPER_END vm_count_block(IP)
173: #else
174: #define SUPER_END
175: #endif
176: #define SUPER_CONTINUE
177:
178: #ifdef DEBUG
179: #define CFA_TO_NAME(__cfa) \
180: Cell len, i; \
181: char * name = __cfa; \
182: for(i=0; i<32; i+=sizeof(Cell)) { \
183: len = ((Cell*)name)[-1]; \
184: if(len < 0) { \
185: len &= 0x1F; \
186: if((len+sizeof(Cell)) > i) break; \
187: } len = 0; \
188: name -= sizeof(Cell); \
189: }
190: #endif
191:
192: #ifdef HAS_FFCALL
193: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
194: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
195: #endif
196:
197: #if !defined(ENGINE)
198: /* normal engine */
199: #define VARIANT(v) (v)
200: #define JUMP(target) goto I_noop
201: #define LABEL(name) J_##name: asm(""); I_##name:
202:
203: #elif ENGINE==2
204: /* variant with padding between VM instructions for finding out
205: cross-inst jumps (for dynamic code) */
206: #define engine engine2
207: #define VARIANT(v) (v)
208: #define JUMP(target) goto I_noop
209: #define LABEL(name) J_##name: SKIP16; I_##name:
210: #define IN_ENGINE2
211:
212: #elif ENGINE==3
213: /* variant with different immediate arguments for finding out
214: immediate arguments (for native code) */
215: #define engine engine3
216: #define VARIANT(v) ((v)^0xffffffff)
217: #define JUMP(target) goto K_lit
218: #define LABEL(name) J_##name: asm(""); I_##name:
219: #else
220: #error illegal ENGINE value
221: #endif /* ENGINE */
222:
223: #define LABEL2(name) K_##name:
224:
225: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
226: /* executes code at ip, if ip!=NULL
227: returns array of machine code labels (for use in a loader), if ip==NULL
228: */
229: {
230: #ifndef GFORTH_DEBUGGING
231: register Cell *rp RPREG;
232: #endif
233: #ifndef NO_IP
234: register Xt *ip IPREG = ip0;
235: #endif
236: register Cell *sp SPREG = sp0;
237: register Float *fp FPREG = fp0;
238: register Address lp LPREG = lp0;
239: register Xt cfa CFAREG;
240: #ifdef MORE_VARS
241: MORE_VARS
242: #endif
243: #ifdef HAS_FFCALL
244: av_alist alist;
245: extern va_alist clist;
246: float frv;
247: int irv;
248: double drv;
249: long long llrv;
250: void * prv;
251: #endif
252: register Address up UPREG = UP;
253: IF_spTOS(register Cell spTOS TOSREG;)
254: IF_fpTOS(register Float fpTOS FTOSREG;)
255: #if defined(DOUBLY_INDIRECT)
256: static Label *symbols;
257: static void *routines[]= {
258: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
259: #else /* !defined(DOUBLY_INDIRECT) */
260: static Label symbols[]= {
261: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
262: #endif /* !defined(DOUBLY_INDIRECT) */
263: #define INST_ADDR(name) ((Label)&&I_##name)
264: #include "prim_lab.i"
265: #undef INST_ADDR
266: (Label)0,
267: #define INST_ADDR(name) ((Label)&&K_##name)
268: #include "prim_lab.i"
269: #undef INST_ADDR
270: #define INST_ADDR(name) ((Label)&&J_##name)
271: #include "prim_lab.i"
272: #undef INST_ADDR
273: (Label)&&after_last
274: };
275: #ifdef CPU_DEP2
276: CPU_DEP2
277: #endif
278:
279: rp = rp0;
280: #ifdef DEBUG
281: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
282: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
283: (unsigned)fp,(unsigned)lp,(unsigned)up);
284: #endif
285:
286: if (ip0 == NULL) {
287: #if defined(DOUBLY_INDIRECT)
288: #define CODE_OFFSET (26*sizeof(Cell))
289: #define XT_OFFSET (22*sizeof(Cell))
290: int i;
291: Cell code_offset = offset_image? CODE_OFFSET : 0;
292: Cell xt_offset = offset_image? XT_OFFSET : 0;
293:
294: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
295: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
296: for (i=0; i<DOESJUMP+1; i++)
297: xts[i] = symbols[i] = (Label)routines[i];
298: for (; routines[i]!=0; i++) {
299: if (i>=MAX_SYMBOLS) {
300: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
301: exit(1);
302: }
303: xts[i] = symbols[i] = &routines[i];
304: }
305: #endif /* defined(DOUBLY_INDIRECT) */
306: return symbols;
307: }
308:
309: IF_spTOS(spTOS = sp[0]);
310: IF_fpTOS(fpTOS = fp[0]);
311: /* prep_terminal(); */
312: #ifdef NO_IP
313: goto *(*(Label *)ip0);
314: #else
315: SET_IP(ip);
316: SUPER_END; /* count the first block, too */
317: NEXT;
318: #endif
319:
320: #ifdef CPU_DEP3
321: CPU_DEP3
322: #endif
323:
324: #include "prim.i"
325: after_last: return (Label *)0;
326: /*needed only to get the length of the last primitive */
327: }
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