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nve.worker.js
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nve.worker.js
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const fs = require("fs");
class NVE {
#memr;#progcnt;#stackp;#framp; // 宣言
constructor(file,args=[0]) { // 初期化
this.file = file;
this.check(file);
let _size = new Uint8Array((this.file.slice(6,10)))
this.size = _size[0]+_size[1]*0x100+_size[2]*0x10000+_size[3]*0x1000000;
console.log("Size:",this.size.toString(10))
this.#memr = new Uint32Array(2**32); // 実行用スタック
this.#progcnt = 0;
this.#stackp = 1;
this.#framp = 0;
}
prog(i) {
let a = new Uint8Array(this.file.slice(10+i*5,10+i*5+1))
return a[0];
}
imme(i) {
let a = new Uint8Array(this.file.slice(10+i*5+1,10+i*5+5))
return a[0]+a[1]*0x100+a[2]*0x10000+a[3]*0x1000000;
}
push(x) {
this.#memr[this.#stackp] = x;
this.#stackp++;
}
pop() {
this.#memr[this.#stackp] = 0;
this.#stackp--;
return this.#memr[this.#stackp];
}
next() { // 一つの命令を実行する
if (this.endRunning()) {console.warn("end runnning")}
//console.log(this.#progcnt,this.#prog[this.#progcnt],this.#imme[this.#progcnt])
// let memshow = function(mem,sp,fp) {
// let ret = "";
// for (let i=0;i<mem.length;i++) {
// if (fp==i) {ret += ","}else {ret += " "}
// if (sp==i) {ret += "."}else {ret += " "}
// let memi = mem[i];
// let n = memi.toString(16);
// ret += "00000000".slice(n.length);
// ret += n;
// }
// return ret
// }
// let ins = ["push","pop","call","ret","fram","setvar","getvar","setgvar","getgvar","setdata","getdata","jmp","ifjmp","add","addc","and","or","xor","equal","less","greater","not","notb","out"];
// console.log("[internal state]"," mem:",memshow(this.#memr.slice(0,17),this.#stackp,this.#framp)," pc:",this.#progcnt.toString(16)," sp:",this.#stackp.toString(16)," fp:",this.#framp.toString(16))
// console.log("")
// console.log("[next]"," opcode:",this.prog(this.#progcnt).toString(16)," mnemonic:",ins[this.prog(this.#progcnt)]," immediate:",this.imme(this.#progcnt).toString(16))
// let adr = function(n) {return n&((2**32)-1);};
switch (this.prog(this.#progcnt)) {
case 0: // push n スタックに即値を入れる
this.push(this.imme(this.#progcnt));
break;
case 1: // pop n スタックトップの値をn個消す
for (let i=0;i<this.imme(this.#progcnt);i++) {
this.pop();
}
break;
case 2: // call 関数を呼ばれたとき
this.push(this.#framp);
this.#framp = this.#stackp;
this.push(this.#progcnt);
this.#progcnt = this.imme(this.#progcnt);
break;
case 3: // ret 関数から返るとき
this.#progcnt = this.pop();
this.#framp = this.pop();
for (let i=0;i<this.imme(this.#progcnt);i++) {
this.pop();
}
break;
case 4: // fram m 局所変数の領域を確保する 0埋めする
for (let i=0;i<this.imme(this.#progcnt);i++) {
this.push(0);
}
break;
// データ移動命令
case 5: // setvar a a個目の局所変数に値を入れる
this.#memr[(this.#framp+this.imme(this.#progcnt))&(4294967295)] = this.pop();
break;
case 6: // getvar a a個目の局所変数から値を複製する
this.push(this.#memr[(this.#framp+this.imme(this.#progcnt))&(4294967295)]);
break;
case 7: // setgvar a a個目のグローバル変数に値を入れる
this.#memr[(this.imme(this.#progcnt))&(4294967295)] = this.pop();
break;
case 8: // getgvar a a個目のグローバル変数から値を複製する
this.push(this.#memr[(this.imme(this.#progcnt))&(4294967295)]);
break;
case 9: // setdata a a個目のヒープ領域に値を入れる
this.#memr[this.#memr.length-((this.imme(this.#progcnt))&(4294967295))] = this.pop();
break;
case 10: // getdata a a個目のヒープ領域から値を複製する
this.push(this.#memr[this.#memr.length-((this.imme(this.#progcnt))&(4294967295))]);
break;
// ジャンプ命令
case 11: // jmp
this.#progcnt = this.imme(this.#progcnt);
break;
case 12: // ifjmp
if (this.pop()!=0) {
this.#progcnt = this.imme(this.#progcnt);
}
break;
// 2項算術演算
case 13: // add
this.push(this.pop()+this.pop());
break;
case 14: // addc
let cs = this.pop()+this.pop()+this.pop();
this.push(cs>>>32);
this.push(cs&(4294967295));
break;
// 2項ビット演算
case 15: // and
this.push(this.pop()&this.pop());
break;
case 16: // or
this.push(this.pop()|this.pop());
break;
case 17: // xor
this.push(this.pop()^this.pop());
break;
// 2項比較演算
case 18: // equal
this.push(Number(this.pop()==this.pop()));
break;
case 19: // less
this.push(Number(this.pop()>this.pop()));
break;
case 20: // greater
this.push(Number(this.pop()<this.pop()));
break;
// 単項ビット演算
case 21: // notb
this.push(~this.pop());
break;
// 単項論理演算
case 22: // not
this.push(Number(!this.pop()));
break;
// 入出力命令
case 23: // out スタックトップの値を出力
console.log("[output],",this.pop().toString(16));
break;
default:
break;
}
this.#progcnt++;
return this;
}
runall() { // 最後まで命令を実行する(最大100000)
let cnt = 0;
while (cnt<100000&&!this.endRunning()) {cnt++;this.next();}
return this;
}
check(file) {
if (!(new TextDecoder("utf-8")).decode(new Uint8Array(file)).startsWith("nveof\n")) {
throw "This file is not NVE-OF";
}
}
endRunning() {return this.#progcnt>=this.size}
}
let path = process.argv[2];
if (path==null) {
console.log("Failed to open file.");
return;
}
fs.stat( path , ( er , stat ) => {
if( er ){
console.log("Failed to open file.");
return;
}else{
if (stat.isFile()) {
console.log("File:",path);
let a = new NVE(fs.readFileSync(path));
a.runall();
// console.log(a.getData())
}
else {
console.log("Failed to open file.")
return;
}
}
});