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Implemented all opcodes, including LOADI and STOREI

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This commit is contained in:
Raimon Zamora
2017-01-24 19:47:19 +01:00
parent 1bd5b0a6da
commit 499b0539d3
5 changed files with 55 additions and 46 deletions
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53
vm.cpp
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@@ -11,7 +11,9 @@ enum OPS {
OP_DUP,
OP_LOAD,
OP_LOADI,
OP_STORE,
OP_STOREI,
OP_JMP,
OP_JNT,
@@ -46,43 +48,48 @@ int vm_pc = 0;
int vm_cycles = 0;
t_stack vm_datastack;
t_stack vm_callstack;
unsigned char mem[65536];
void vm_init(const unsigned char* program) {
vm_program = program;
vm_pc = 0;
vm_datastack = stack_new(MAX_DATA_STACK);
vm_callstack = stack_new(MAX_CALL_STACK);
stack_init(vm_datastack, MAX_DATA_STACK);
stack_init(vm_callstack, MAX_CALL_STACK);
}
inline unsigned short WORD() { vm_pc += 2; return vm_program[vm_pc - 2] + (vm_program[vm_pc - 1] << 8); }
void vm_step() {
char val;
switch (vm_program[vm_pc++]) {
case OP_NOP: vm_cycles++; break;
case OP_PUSH: stack_push(vm_datastack, vm_program[vm_pc++]); vm_cycles++; break;
case OP_POP: stack_pop(vm_datastack); vm_cycles++; break;
case OP_DUP: stack_push(vm_datastack, stack_peek(vm_datastack)); vm_cycles++; break;
case OP_LOAD: vm_cycles++; break;
case OP_STORE: vm_cycles++; break;
case OP_JMP: vm_pc = vm_program[vm_pc] + (vm_program[vm_pc + 1] << 8); vm_cycles++; break;
case OP_JNT: vm_cycles++; break;
case OP_JTR: vm_cycles++; break;
case OP_JSR: vm_cycles++; break;
case OP_RET: vm_cycles++; break;
case OP_LOAD: stack_push(vm_datastack, mem[WORD()]); vm_cycles++; break;
case OP_LOADI: stack_push(vm_datastack, mem[WORD() + stack_pop(vm_datastack)]); vm_cycles++; break;
case OP_STORE: mem[WORD()] = stack_pop(vm_datastack); vm_cycles++; break;
case OP_STOREI: val = stack_pop(vm_datastack); mem[WORD() + stack_pop(vm_datastack)] = val; vm_cycles++; break;
case OP_JMP: vm_pc = WORD(); vm_cycles++; break;
case OP_JNT: if (stack_pop(vm_datastack) == 0) { vm_pc = WORD(); } vm_cycles++; break;
case OP_JTR: if (stack_pop(vm_datastack) != 0) { vm_pc = WORD(); } vm_cycles++; break;
case OP_JSR: stack_push(vm_callstack, vm_pc+2); vm_pc = WORD(); vm_cycles++; break;
case OP_RET: vm_pc = stack_pop(vm_callstack); vm_cycles++; break;
case OP_CALL: external_calls[vm_program[vm_pc++]](vm_datastack); vm_cycles++; break;
case OP_ADD: vm_cycles++; break;
case OP_SUB: vm_cycles++; break;
case OP_MUL: vm_cycles++; break;
case OP_DIV: vm_cycles++; break;
case OP_MOD: vm_cycles++; break;
case OP_AND: vm_cycles++; break;
case OP_OR: vm_cycles++; break;
case OP_NOT: vm_cycles++; break;
case OP_NEG: vm_cycles++; break;
case OP_INC: vm_cycles++; break;
case OP_EQ: vm_cycles++; break;
case OP_NEQ: vm_cycles++; break;
case OP_LT: vm_cycles++; break;
case OP_GT: vm_cycles++; break;
case OP_ADD: stack_push(vm_datastack, stack_pop(vm_datastack) + stack_pop(vm_datastack)); vm_cycles++; break;
case OP_SUB: stack_push(vm_datastack, stack_pop(vm_datastack) - stack_pop(vm_datastack)); vm_cycles++; break;
case OP_MUL: stack_push(vm_datastack, stack_pop(vm_datastack) * stack_pop(vm_datastack)); vm_cycles++; break;
case OP_DIV: stack_push(vm_datastack, stack_pop(vm_datastack) / stack_pop(vm_datastack)); vm_cycles++; break;
case OP_MOD: stack_push(vm_datastack, stack_pop(vm_datastack) % stack_pop(vm_datastack)); vm_cycles++; break;
case OP_AND: stack_push(vm_datastack, stack_pop(vm_datastack) & stack_pop(vm_datastack)); vm_cycles++; break;
case OP_OR: stack_push(vm_datastack, stack_pop(vm_datastack) | stack_pop(vm_datastack)); vm_cycles++; break;
case OP_NOT: stack_push(vm_datastack, !stack_pop(vm_datastack)); vm_cycles++; break;
case OP_NEG: stack_push(vm_datastack, -stack_pop(vm_datastack)); vm_cycles++; break;
case OP_INC: stack_push(vm_datastack, stack_pop(vm_datastack)+1); vm_cycles++; break;
case OP_EQ: stack_push(vm_datastack, stack_pop(vm_datastack) == stack_pop(vm_datastack)); vm_cycles++; break;
case OP_NEQ: stack_push(vm_datastack, stack_pop(vm_datastack) != stack_pop(vm_datastack)); vm_cycles++; break;
case OP_LT: stack_push(vm_datastack, stack_pop(vm_datastack) < stack_pop(vm_datastack)); vm_cycles++; break;
case OP_GT: stack_push(vm_datastack, stack_pop(vm_datastack) > stack_pop(vm_datastack)); vm_cycles++; break;
}
}