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JSR and RET now save and restore registers

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Raimon Zamora
2017-01-25 18:42:49 +01:00
parent 8d749ea633
commit b12be2494d
1 changed files with 2 additions and 2 deletions
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4
vm.cpp
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@@ -112,8 +112,8 @@ void vm_step() {
case OP_JMP: vm_pc = WORD(); 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_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_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_JSR: stack_push(vm_callstack, vm_pc + 2); stack_push(vm_callstack, rX & 255); stack_push(vm_callstack, rX >> 8); stack_push(vm_callstack, rY); stack_push(vm_callstack, rZ); vm_pc = WORD(); vm_cycles++; break;
case OP_RET: vm_pc = stack_pop(vm_callstack); vm_cycles++; break; case OP_RET: rZ = stack_pop(vm_callstack); rY = stack_pop(vm_callstack); rX = (stack_pop(vm_callstack) << 8) + stack_pop(vm_callstack); 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_CALL: external_calls[vm_program[vm_pc++]](vm_datastack); vm_cycles++; break;
case OP_RJYZ: if (rY == 0) vm_pc += vm_program[vm_pc]; vm_cycles++; break; case OP_RJYZ: if (rY == 0) vm_pc += vm_program[vm_pc]; vm_cycles++; break;
case OP_RJYN: if (rY != 0) vm_pc += vm_program[vm_pc]; vm_cycles++; break; case OP_RJYN: if (rY != 0) vm_pc += vm_program[vm_pc]; vm_cycles++; break;