1: /* support functions for vmgen example
2:
3: Copyright (C) 2001 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 <stdio.h>
23:
24: #ifdef __GNUC__
25: typedef void *Label;
26: typedef void *Inst; /* for direct threading, the same as Label */
27: #else
28: typedef long Label;
29: typedef long Inst;
30: #endif
31: typedef long Cell;
32:
33: extern Inst *vm_prim;
34: extern int locals;
35: extern Cell peeptable;
36: extern int vm_debug;
37: extern FILE *yyin;
38: extern int yylineno;
39: extern char *program_name;
40: extern FILE *vm_out;
41: extern Inst *vmcodep;
42: extern Inst *last_compiled;
43: extern Inst *vmcode_end;
44: extern int use_super;
45:
46: /* generic vmgen support functions (e.g., wrappers) */
47: void gen_inst(Inst **vmcodepp, Inst i);
48: void init_peeptable(void);
49: void vm_disassemble(Inst *ip, Inst *endp, Inst prim[]);
50: void vm_count_block(Inst *ip);
51: struct block_count *block_insert(Inst *ip);
52: void vm_print_profile(FILE *file);
53:
54: /* type change macros; these are specific to the types you use, so you
55: have to change this part */
56: #define vm_Cell2i(_cell,x) ((x)=(long)(_cell))
57: #define vm_Cell2target(_cell,x) ((x)=(Inst *)(_cell))
58: #define vm_Cell2a(_cell,x) ((x)=(char *)(_cell))
59: #define vm_i2Cell(x,_cell) ((_cell)=(Cell)(x))
60: #define vm_target2Cell(x,_cell) ((_cell)=(Cell)(x))
61: #define vm_a2Cell(x,_cell) ((_cell)=(Cell)(x))
62: #define vm_Cell2Cell(_x,_y) ((_y)=(Cell)(_x))
63:
64: #define VM_IS_INST(inst, n) ((inst) == vm_prim[n])
65:
66: /* mini type-specific support functions */
67: void genarg_i(Inst **vmcodepp, Cell i);
68: void printarg_i(Cell i);
69: void genarg_target(Inst **vmcodepp, Inst *target);
70: void printarg_target(Inst *target);
71: void printarg_a(char *a);
72: void printarg_Cell(Cell i);
73:
74: /* engine functions (type not fixed) */
75: Cell engine(Inst *ip0, Cell *sp, char *fp);
76: Cell engine_debug(Inst *ip0, Cell *sp, char *fp);
77:
78: /* other generic functions */
79: int yyparse(void);
80:
81: /* mini-specific functions */
82: void insert_func(char *name, Inst *start, int locals, int nonparams);
83: Inst *func_addr(char *name);
84: Cell func_calladjust(char *name);
85: void insert_local(char *name);
86: Cell var_offset(char *name);
87: void gen_main_end(void);
88:
89: /* stack pointer change for a function with n nonparams */
90: #define adjust(n) ((n) * -sizeof(Cell))
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