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/* Copyright (C) 2023 Aryadev Chavali
* You may distribute and modify this code under the terms of the
* GPLv2 license. You should have received a copy of the GPLv2
* license with this file. If not, please write to:
* aryadev@aryadevchavali.com.
* Created: 2023-10-15
* Author: Aryadev Chavali
* Description: Virtual machine implementation
*/
#ifndef RUNTIME_H
#define RUNTIME_H
#include <stdio.h>
#include <stdlib.h>
#include "./base.h"
#include "./inst.h"
#define VM_REGISTERS 8
typedef struct
{
struct Registers
{
word ret;
word reg[VM_REGISTERS];
} registers;
struct Stack
{
byte *data;
word ptr, max;
} stack;
struct Program
{
inst_t *instructions;
word ptr, max;
} program;
} vm_t;
#define VM_REG_BYTE(REG) ((REG)&0b11111111)
#define VM_REG_HWORD(REG) ((REG)&0b11111111111111111111111111111111)
#define VM_REG_WORD(REG) ((REG))
void vm_execute(vm_t *);
void vm_execute_all(vm_t *);
void vm_load_stack(vm_t *, byte *, size_t);
void vm_load_program(vm_t *, inst_t *, size_t);
// Print routines
void vm_print_registers(vm_t *, FILE *);
void vm_print_stack(vm_t *, FILE *);
#define VM_PRINT_PROGRAM_EXCERPT 5
void vm_print_program(vm_t *, FILE *);
void vm_print_all(vm_t *, FILE *);
void vm_push_byte(vm_t *, data_t);
void vm_push_hword(vm_t *, data_t);
void vm_push_word(vm_t *, data_t);
typedef void (*push_f)(vm_t *, data_t);
static const push_f PUSH_ROUTINES[] = {
[OP_PUSH_BYTE] = vm_push_byte,
[OP_PUSH_HWORD] = vm_push_hword,
[OP_PUSH_WORD] = vm_push_word,
};
void vm_push_byte_register(vm_t *, byte);
void vm_push_hword_register(vm_t *, byte);
void vm_push_word_register(vm_t *, byte);
typedef void (*push_reg_f)(vm_t *, byte);
static const push_reg_f PUSH_REG_ROUTINES[] = {
[OP_PUSH_REGISTER_BYTE] = vm_push_byte_register,
[OP_PUSH_REGISTER_HWORD] = vm_push_hword_register,
[OP_PUSH_REGISTER_WORD] = vm_push_word_register,
};
data_t vm_mov_byte(vm_t *, byte);
data_t vm_mov_hword(vm_t *, byte);
data_t vm_mov_word(vm_t *, byte);
typedef data_t (*mov_f)(vm_t *, byte);
static const mov_f MOV_ROUTINES[] = {
[OP_MOV_BYTE] = vm_mov_byte,
[OP_MOV_HWORD] = vm_mov_hword,
[OP_MOV_WORD] = vm_mov_word,
};
data_t vm_pop_byte(vm_t *);
data_t vm_pop_hword(vm_t *);
data_t vm_pop_word(vm_t *);
typedef data_t (*pop_f)(vm_t *);
static const pop_f POP_ROUTINES[] = {
[OP_POP_BYTE] = vm_pop_byte,
[OP_POP_HWORD] = vm_pop_hword,
[OP_POP_WORD] = vm_pop_word,
};
#endif
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