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[VM] Added arg stack.

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This commit is contained in:
jtuu 2019-09-15 23:20:49 +03:00
parent 5458d06d8e
commit 98acdbf7f9
1 changed files with 32 additions and 1 deletions
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33
src/quest_editor/scripting/vm/index.ts
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@ -1,4 +1,4 @@
import { Instruction, InstructionSegment, Segment, SegmentType } from "../instructions"; import { Instruction, InstructionSegment, Segment, SegmentType, Arg } from "../instructions";
import { import {
OP_CALL, OP_CALL,
OP_CLEAR, OP_CLEAR,
@ -14,6 +14,13 @@ import {
OP_SYNC, OP_SYNC,
OP_THREAD, OP_THREAD,
OP_JMP, OP_JMP,
OP_ARG_PUSHR,
OP_ARG_PUSHL,
OP_ARG_PUSHB,
OP_ARG_PUSHW,
OP_ARG_PUSHA,
OP_ARG_PUSHO,
OP_ARG_PUSHS,
} from "../opcodes"; } from "../opcodes";
import Logger from "js-logger"; import Logger from "js-logger";
@ -130,6 +137,15 @@ export class VirtualMachine {
case OP_JMP: case OP_JMP:
this.jump_to_label(exec, inst.args[0].value); this.jump_to_label(exec, inst.args[0].value);
break; break;
case OP_ARG_PUSHR:
case OP_ARG_PUSHL:
case OP_ARG_PUSHB:
case OP_ARG_PUSHW:
case OP_ARG_PUSHA:
case OP_ARG_PUSHO:
case OP_ARG_PUSHS:
this.push_arg_stack(exec, inst.args[0].value);
break;
default: default:
throw new Error(`Unsupported instruction: ${inst.opcode.mnemonic}.`); throw new Error(`Unsupported instruction: ${inst.opcode.mnemonic}.`);
} }
@ -235,6 +251,20 @@ export class VirtualMachine {
} }
} }
private push_arg_stack(exec: Thread, arg: Arg): void {
exec.arg_stack.push(arg);
}
private pop_arg_stack(exec: Thread): Arg {
const arg = exec.arg_stack.pop();
if (!arg) {
throw new Error("Argument stack underflow.");
}
return arg;
}
private get_next_instruction_from_thread(exec: Thread): Instruction { private get_next_instruction_from_thread(exec: Thread): Instruction {
if (exec.call_stack.length) { if (exec.call_stack.length) {
const top = exec.call_stack_top(); const top = exec.call_stack_top();
@ -272,6 +302,7 @@ class Thread {
* Call stack. The top element describes the instruction about to be executed. * Call stack. The top element describes the instruction about to be executed.
*/ */
public call_stack: ExecutionLocation[] = []; public call_stack: ExecutionLocation[] = [];
public arg_stack: Arg[] = [];
/** /**
* Global or floor-local? * Global or floor-local?
*/ */