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209f3a3aef
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52 lines
1.7 KiB
JavaScript
52 lines
1.7 KiB
JavaScript
// SPDX-License-Identifier: MIT
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// Copyright (c) Uri Shaked and contributors
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import { avrInstruction } from '../cpu/instruction.js';
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import { assemble } from './assembler.js';
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const BREAK_OPCODE = 0x9598;
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export function asmProgram(source) {
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const { bytes, errors, lines, labels } = assemble(source);
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if (errors.length) {
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throw new Error('Assembly failed: ' + errors);
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}
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return { program: new Uint16Array(bytes.buffer), lines, instructionCount: lines.length, labels };
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}
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const defaultOnBreak = () => {
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throw new Error('BREAK instruction encountered');
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};
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export class TestProgramRunner {
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constructor(cpu, onBreak = defaultOnBreak) {
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this.cpu = cpu;
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this.onBreak = onBreak;
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}
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runInstructions(count) {
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const { cpu, onBreak } = this;
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for (let i = 0; i < count; i++) {
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if (cpu.progMem[cpu.pc] === BREAK_OPCODE) {
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onBreak === null || onBreak === void 0 ? void 0 : onBreak(cpu);
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}
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avrInstruction(cpu);
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cpu.tick();
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}
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}
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runUntil(predicate, maxIterations = 5000) {
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const { cpu, onBreak } = this;
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for (let i = 0; i < maxIterations; i++) {
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if (cpu.progMem[cpu.pc] === BREAK_OPCODE) {
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onBreak === null || onBreak === void 0 ? void 0 : onBreak(cpu);
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}
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if (predicate(cpu)) {
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return;
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}
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avrInstruction(cpu);
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cpu.tick();
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}
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throw new Error('Test program ran for too long, check your predicate');
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}
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runToBreak() {
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this.runUntil((cpu) => cpu.progMem[cpu.pc] === BREAK_OPCODE);
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}
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runToAddress(byteAddr) {
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this.runUntil((cpu) => cpu.pc * 2 === byteAddr);
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}
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}
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