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: typedef long Cell;
25: #ifdef __GNUC__
26: typedef void *Label;
27: typedef Label Inst; /* we could "typedef Cell Inst", removing the need
28: for casts in a few places, but requiring a few
29: casts etc. in other places */
30: #else
31: typedef long Label;
32: typedef long Inst;
33: #endif
34:
35: extern Inst *vm_prim;
36: extern int locals;
37: extern Cell peeptable;
38: extern int vm_debug;
39: extern FILE *yyin;
40: extern int yylineno;
41: extern char *program_name;
42: extern FILE *vm_out;
43: extern Inst *vmcodep;
44: extern Inst *last_compiled;
45: extern Inst *vmcode_end;
46: extern int use_super;
47:
48: /* generic vmgen support functions (e.g., wrappers) */
49: void gen_inst(Inst **vmcodepp, Inst i);
50: void init_peeptable(void);
51: void vm_disassemble(Inst *ip, Inst *endp, Inst prim[]);
52: void vm_count_block(Inst *ip);
53: struct block_count *block_insert(Inst *ip);
54: void vm_print_profile(FILE *file);
55:
56: /* type change macros; these are specific to the types you use, so you
57: have to change this part */
58: #define vm_Cell2i(_cell,x) ((x)=(long)(_cell))
59: #define vm_Cell2target(_cell,x) ((x)=(Inst *)(_cell))
60: #define vm_Cell2a(_cell,x) ((x)=(char *)(_cell))
61: #define vm_i2Cell(x,_cell) ((_cell)=(Cell)(x))
62: #define vm_target2Cell(x,_cell) ((_cell)=(Cell)(x))
63: #define vm_a2Cell(x,_cell) ((_cell)=(Cell)(x))
64: #define vm_Cell2Cell(_x,_y) ((_y)=(Cell)(_x))
65: /* the cast in vm_Cell2Cell is needed because the base type for
66: inst-stream is Cell, but *IP is an Inst */
67:
68: #define VM_IS_INST(inst, n) ((inst) == vm_prim[n])
69:
70: /* mini type-specific support functions */
71: void genarg_i(Inst **vmcodepp, Cell i);
72: void printarg_i(Cell i);
73: void genarg_target(Inst **vmcodepp, Inst *target);
74: void printarg_target(Inst *target);
75: void printarg_a(char *a);
76: void printarg_Cell(Cell i);
77:
78: /* engine functions (type not fixed) */
79: Cell engine(Inst *ip0, Cell *sp, char *fp);
80: Cell engine_debug(Inst *ip0, Cell *sp, char *fp);
81:
82: /* other generic functions */
83: int yyparse(void);
84:
85: /* mini-specific functions */
86: void insert_func(char *name, Inst *start, int locals, int nonparams);
87: Inst *func_addr(char *name);
88: Cell func_calladjust(char *name);
89: void insert_local(char *name);
90: Cell var_offset(char *name);
91: void gen_main_end(void);
92:
93: /* stack pointer change for a function with n nonparams */
94: #define adjust(n) ((n) * -sizeof(Cell))
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