File:  [gforth] / gforth / vmgen-ex2 / mini.h
Revision 1.1: download - view: text, annotated - select for diffs
Sun Jun 2 15:46:17 2002 UTC (17 years, 7 months ago) by anton
Branches: MAIN
CVS tags: HEAD
vmgen-related changes:
in prims2x:
  Conversion macros for single items now take 2 arguments
  Converting from two items to a type has changed order
  argument printing for disassembler disabled (for now)
  disassembler now also uses VM_IS_INST
in Gforth and vmgen-ex: adapted to work with changed prims2x
new: vmgen-ex2: uses union for Cell instead of casting (lots of
   changes compared to vmgen-ex)

    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 void *Label; 
   25: 
   26: #ifdef USE_CASTS
   27: typedef long Cell;
   28: Typedef Cell Inst;
   29: 
   30: /* type change macros; these are specific to the types you use, so you
   31:    have to change this part */
   32: #define vm_Cell2i(_cell,x) ((x)=(long)(_cell))
   33: #define vm_i2Cell(_cell,x) ((x)=(Cell)(_cell))
   34: #define vm_Cell2target(_cell,x) ((x)=(Inst *)(_cell))
   35: #define vm_target2Cell(_cell,x) ((x)=(Cell)(_cell))
   36: #define vm_Cell2a(_cell,x) ((x)=(char *)(_cell))
   37: #define vm_a2Cell(_cell,x) ((x)=(Cell)(_cell))
   38: #else
   39: typedef union Cell {
   40:   long i;
   41:   union Cell *target;
   42:   Label inst;
   43:   char *a;
   44: } Cell, Inst;
   45: 
   46: #define vm_Cell2i(_cell,_x)	((_x)=(_cell).i)
   47: #define vm_i2Cell(_x,_cell)	((_cell).i=(_x))	
   48: #define vm_Cell2target(_cell,_x) ((_x)=(_cell).target)
   49: #define vm_target2Cell(_x,_cell) ((_cell).target=(_x))	
   50: #define vm_Cell2a(_cell,_x)	((_x)=(_cell).a)
   51: #define vm_a2Cell(_x,_cell)	((_cell).a=(_x))	
   52: #endif
   53: 
   54: #define VM_IS_INST(_inst, n) ((_inst).inst == vm_prim[n])
   55: 
   56: extern Label *vm_prim;
   57: extern int locals;
   58: extern struct Peeptable_entry **peeptable;
   59: extern int vm_debug;
   60: extern FILE *yyin;
   61: extern int yylineno;
   62: extern char *program_name;
   63: extern FILE *vm_out;
   64: extern Inst *vmcodep;
   65: extern Inst *last_compiled;
   66: extern Inst *vmcode_end;
   67: 
   68: /* generic vmgen support functions (e.g., wrappers) */
   69: void gen_inst(Inst **vmcodepp, Label i);
   70: void init_peeptable(void);
   71: void vm_disassemble(Inst *ip, Inst *endp, Label prim[]);
   72: void vm_count_block(Inst *ip);
   73: struct block_count *block_insert(Inst *ip);
   74: void vm_print_profile(FILE *file);
   75: 
   76: /* mini type-specific support functions */
   77: void genarg_i(Inst **vmcodepp, long i);
   78: void printarg_i(long i);
   79: void genarg_target(Inst **vmcodepp, Inst *target);
   80: void printarg_target(Inst *target);
   81: void printarg_a(char *a);
   82: void printarg_Cell(Cell i);
   83: 
   84: /* engine functions (type not fixed) */
   85: long engine(Inst *ip0, Cell *sp, char *fp);
   86: long engine_debug(Inst *ip0, Cell *sp, char *fp);
   87: 
   88: /* other generic functions */
   89: int yyparse(void);
   90: 
   91: /* mini-specific functions */
   92: void insert_func(char *name, Inst *start, int locals, int nonparams);
   93: Inst *func_addr(char *name);
   94: long func_calladjust(char *name);
   95: void insert_local(char *name);
   96: long var_offset(char *name);
   97: void gen_main_end(void);
   98: 
   99: /* stack pointer change for a function with n nonparams */
  100: #define adjust(n)  ((n) * -sizeof(Cell))

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