Annotation of gforth/vmgen-ex2/mini.h, revision 1.4

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

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