アセンブラーを作る。 その4

概要

アセンブラーを作る。
AYUMUというcpuのアセンブラー、作ってみた。

参考にしたページ

投入したソースコード

ayumu.xor(r0, r0)
ayumu.addi(r0, 201)
ayumu.intf(T0, r0)
ayumu.xor(r8, r8)
ayumu.xor(r12, r12)
ayumu.xor(r13, r13)
ayumu.addi(r12, 0)
ayumu.addi(r13, 15)
ayumu.intp(T0, 0)
ayumu.wt(Out0, r1)
ayumu.xor(r12, r12)
ayumu.xor(r12, r13)
ayumu.addi(r12, 0)
ayumu.addi(r13, 9)
ayumu.jmp(0)
ayumu.st(r8, r8)
ayumu.addi(r8, 1)
ayumu.st(r12, r8)
ayumu.addi(r8, 1)
ayumu.st(r13, r8)
ayumu.addi(r1, 1)
ayumu.wt(Out0, r1)
ayumu.ld(r13, r8)
ayumu.subi(r8, 1)
ayumu.ld(r12, r8)
ayumu.subi(r8, 1)
ayumu.ld(r8, r8)
ayumu.jmpp()

実行結果

5800
80C9
6200
5800
58CC
58DD
8C00
8D0F
5200
4601
58CC
58CD
8C00
8D09
1000
4300
8001
43C0
8001
43D0
8101
4601
47D0
9001
47C0
9001
4700
1020

サンプルコード

var src = document.getElementById('src');
var out = document.getElementById('out');
var r0 = 0;
var r1 = 1;
var T0 = 0;
var r8 = 0;
var r12 = 12;
var r13 = 13;
var Out0 = 0;
function opcode4(a) {
	var res;
  switch (a) 
  {
	case "0000":
		res = "0";
	break;
	case "0001":
		res = "1";
	break;
	case "0010":
		res = "2";
	break;
	case "0011":
		res = "3";
	break;
	case "0100":
		res = "4";
	break;
	case "0101":
		res = "5";
	break;
	case "0110":
		res = "6";
	break;
	case "0111":
		res = "7";
	break;
	case "1000":
		res = "8";
	break;
	case "1001":
		res = "9";
	break;
	case "1010":
		res = "A";
	break;
	case "1011":
		res = "B";
	break;
	case "1100":
		res = "C";
	break;
	case "1101":
		res = "D";
	break;
	case "1110":
		res = "E";
	break;
	case "1111":
		res = "F";
	break;
	}
  return res;
};
function opcode(s) {
  var res;
  res = opcode4(s.substring(0, 4)) 
    + opcode4(s.substring(4, 8))
    + opcode4(s.substring(8, 12))
    + opcode4(s.substring(12, 16));  
  return res + "\n";
}
function reg4(i) {
	var b = i.toString(2);
  return ('00000' + b).slice(-4);
}
function imm8l(i) {
	var d = i & 0xf;
	var b = d.toString(2);
  return ('0000' + b).slice(-4);
}
function imm8h(i) {
	var d = i >> 4;
	var b = d.toString(2);
  return ('0000' + b).slice(-4);
}
var ayumu = {
 	PC: 0,
  xor: function(r0, r1) {
		out.value += opcode("01011000" + reg4(r0) + reg4(r1));
		this.PC++;
	},
	addi: function(r0, i) {
		out.value += opcode("1000" + reg4(r0) + imm8h(i) + imm8l(i));
		this.PC++;
	},
  subi: function(r0, i) {
		out.value += opcode("1001" + reg4(r0) + imm8h(i) + imm8l(i));
		this.PC++;
	},
	rd: function(r0, r1) {
		out.value += opcode("01000010" + reg4(r0) + reg4(r1));
		this.PC++;
	},
	wt: function(r0, r1) {
		out.value += opcode("01000110" + reg4(r0) + reg4(r1));
		this.PC++;
	},
	intp: function(r0, i) {
		out.value += opcode("01010010" + reg4(r0) + imm8l(i));
		this.PC++;
	},
	intf: function(r0, i) {
		out.value += opcode("01100010" + reg4(r0) + imm8l(i));
		this.PC++;
	},
  jmp: function(i) {
		out.value += opcode("000100000000" + reg4(i));
		this.PC++;
  },
	st: function(r0, r1) {
		out.value += opcode("01000011" + reg4(r0) + reg4(r1));
		this.PC++;
	},
	ld: function(r0, r1) {
		out.value += opcode("01000111" + reg4(r0) + reg4(r1));
		this.PC++;
	},
  jmpp: function() {
		out.value += opcode("0001000000100000");
		this.PC++;
  },
	nop: function() {
		out.value += opcode("0000000000000000");
		this.PC++;
  },
}
function run() {
  var str = src.value;
  var codes = str.split("\n");  
  var len = codes.length - 1;
  while (ayumu.PC < len)
  {
    eval(codes[ayumu.PC]);
  }
  alert("ok")
}

成果物

以上。