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cpuemu.html
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cpuemu.html
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<!DOCTYPE html><html><head><meta charset="utf-8"/>
<meta name="viewport" content="target-densitydpi=low-dpi, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, width=device-width"/>
<meta name="apple-mobile-web-app-capable" content="yes"/>
<meta name="apple-mobile-web-app-status-bar-style" content="black"/><!-- default / black / black-translucent -->
<meta name="format-detection" content="telephone=no"/>
<title>cpuemu - Alpha1</title>
<meta property="og:image" content="cpuemu.png">
<link rel="apple-touch-icon" href="cpuemu.png"/>
<style>
body {
font-family: sans-serif;
}
</style>
<script src="lib/fukuno.js"></script>
<script>"use strict";
var CPU = function() {
this.r = []; // var:0-7, sp:13, link:14, pc:15
this.status = {
get: function() {
var res = 0;
res |= (this.n ? (1 << 31) : 0);
res |= (this.z ? (1 << 30) : 0);
res |= (this.c ? (1 << 29) : 0);
res |= (this.v ? (1 << 28) : 0);
res |= (this.q ? (1 << 27) : 0);
res |= ((this.it & 3) << 25);
res |= (this.j ? (1 << 24) : 0);
res |= ((this.ge & 0xf) << 16);
res |= ((this.it & 0xfc) << 8);
res |= (this.E ? (1 << 9) : 0);
res |= (this.A ? (1 << 8) : 0);
res |= (this.I ? (1 << 7) : 0);
res |= (this.F ? (1 << 6) : 0);
res |= (this.t ? (1 << 5) : 0);
res |= (this.mode & 0x1f);
return res & 0xffffffff;
},
set: function(n) {
this.n = (n & (1 << 31)) != 0;
this.z = (n & (1 << 30)) != 0;
this.c = (n & (1 << 29)) != 0;
this.v = (n & (1 << 28)) != 0;
this.q = (n & (1 << 27)) != 0;
this.it = (((n >> 8) & 0xfc) | ((n >> 25) & 3));
this.j = (n & (1 << 24)) != 0;
this.ge = ((n >> 16) & 0xf);
this.E = (n & (1 << 9)) != 0;
this.A = (n & (1 << 8)) != 0;
this.I = (n & (1 << 7)) != 0;
this.F = (n & (1 << 6)) != 0;
this.t = (n & (1 << 5)) != 0;
this.mode = n & 0x1f;
}
};
this.reset = function() {
for (var i = 0; i < 16; i++)
this.r[i] = 0;
this.status.set(0);
};
this.reset();
this.mem = {
ram: [],
get: function(ad) {
return this.ram[ad];
},
set: function(ad, n) {
this.ram[ad] = n;
},
get16: function(ad) {
var n = this.ram[ad++];
n |= this.ram[ad] << 8;
return n;
},
set16: function(ad, n) {
this.ram[ad++] = n & 0xff;
this.ram[ad] = (n >> 8) & 0xff;
},
};
this.step = function() {
var code = this.mem.get16(this.r[15]);
// this.code = code;
this.r[15] += 2;
// console.log(code.toString(2));
// alert(code.toString(2));
var chk = function(bin) {
var n = parseInt(bin, 2);
var c = code >> (16 - bin.length);
return c == n;
};
var getu = function(start, n) {
return (code >> start) & ((1 << n) - 1);
};
var getn = function(start, n) {
var res = (code >> start) & ((1 << n) - 1);
if ((res >> (n - 1)) != 0)
return res - (1 << n);
return res;
};
this.setflg = function(n) {
this.status.z = n == 0;
this.status.n = (n >> 31) != 0;
return n;
};
if (chk("00100")) { // Rd = u8
this.r[getu(8, 3)] = this.setflg(getu(0, 8));
} else if (chk("0100011000")) { // Rd = Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)]);
} else if (chk("01111")) { // Rd = [Rn + u5]
this.r[getu(0, 3)] = this.setflg(this.mem.get(this.r[getu(3, 3)] + getu(6, 5)));
} else if (chk("01110")) { // [Rn + u5] = Rd
this.mem.set(this.r[getu(3, 3)] + getu(6, 5), this.setflg(this.r[getu(0, 3)]));
} else if (chk("0101110")) { // Rd = [Rn + Rm]
this.r[getu(0, 3)] = this.setflg(this.mem.get(this.r[getu(3, 3)] + this.r[getu(6, 3)]));
} else if (chk("0101010")) { // [Rn + Rm] = Rd
this.mem.set(this.r[getu(3, 3)] + this.r[getu(6, 3)], this.setflg(this.r[getu(0, 3)]));
} else if (chk("00110")) { // Rd = Rd + u8
this.r[getu(8, 3)] = this.setflg(this.r[getu(8, 3)] + getu(0, 8));
} else if (chk("00111")) { // Rd = Rd - u8
this.r[getu(8, 3)] = this.setflg(this.r[getu(8, 3)] - getu(0, 8));
} else if (chk("00000")) { // Rd = Rm << u5
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] << getu(6, 5));
} else if (chk("00001")) { // Rd = Rm >> u5
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] >> getu(6, 5));
} else if (chk("0001100")) { // Rd = Rn + Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] + this.r[getu(6, 3)]);
} else if (chk("0001101")) { // Rd = Rn - Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] - this.r[getu(6, 3)]);
} else if (chk("0001110")) { // Rd = Rn + u3
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] + getu(6, 3));
} else if (chk("0001111")) { // Rd = Rn - u3
this.r[getu(0, 3)] = this.setflg(this.r[getu(3, 3)] - getu(6, 3));
} else if (chk("0100000000")) { // Rd = Rd & Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] & this.r[getu(3, 3)]);
} else if (chk("0100000001")) { // Rd = Rd ^ Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] ^ this.r[getu(3, 3)]);
} else if (chk("0100000010")) { // Rd = Rd << Rs
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] << this.r[getu(3, 3)]);
} else if (chk("0100000011")) { // Rd = Rd >> Rs
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] >> this.r[getu(3, 3)]);
} else if (chk("0100001001")) { // Rd = -Rm
this.r[getu(0, 3)] = this.setflg(-this.r[getu(3, 3)]);
} else if (chk("0100001100")) { // Rd = Rd | Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] | this.r[getu(3, 3)]);
} else if (chk("0100001101")) { // Rd = Rd * Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] * this.r[getu(3, 3)]);
} else if (chk("0100001110")) { // Rd = Rd & ~Rm
this.r[getu(0, 3)] = this.setflg(this.r[getu(0, 3)] & ~this.r[getu(3, 3)]);
} else if (chk("0100001111")) { // Rd = ~Rm
this.r[getu(0, 3)] = this.setflg(~this.r[getu(3, 3)]);
} else if (chk("00101")) { // Rn - u8
this.setflg(this.r[getu(8, 3)] - getu(0, 8));
} else if (chk("0100001010")) { // Rn - Rm
this.setflg(this.r[getu(0, 3)] - this.r[getu(3, 3)]);
} else if (chk("0100001000")) { // Rn & Rm
this.setflg(this.r[getu(0, 3)] & this.r[getu(3, 3)]);
} else if (chk("11010000")) { // IF 0 GOTO n8 << 1
if (this.status.z)
this.r[15] = (getn(0, 8) + 2) << 1;
} else if (chk("11010001")) { // IF !0 GOTO n8 << 1
if (!this.status.z)
this.r[15] += (getn(0, 8) + 2) << 1;
} else if (chk("11100")) { // GOTO n11 << 1
this.r[15] += (getn(0, 11) + 2) << 1;
} else if (chk("0100011101110000")) { // ret
// alert("ret");
return 0;
}
// dump(this.r);
return 1;
};
};
window.onload = function() {
var cpu = new CPU();
for (var i = 0; i < 16; i++) {
var r = create("div");
r.textContent = "R" + i + ": ";
get("regs").appendChild(r);
}
var r = create("div");
r.textContent = "Zero-flg: ";
get("regs").appendChild(r);
var showRegs = function() {
var rs = get("regs").childNodes;
for (var i = 0; i < 16; i++) {
rs[i].textContent = "R" + i + ": " + cpu.r[i] + " #" + cpu.r[i].toString(16);
}
rs[16].textContent = "Zero-flg: " + cpu.status.z;
};
var reset = function() {
cpu.reset();
cpu.r[1] = 0x100;
cpu.r[15] = 0;
autoflg = false;
var s = get("prog").value.split("\n");
var n = 0;
var parse = function(n) {
var s = "";
for (var i = 0; i < n.length; i++) {
if (n.charAt(i) == "0" || n.charAt(i) == "1")
s += n.charAt(i);
}
return s;
};
for (var i = 0; i < s.length; i++) {
var code = parse(s[i]);
if (code.length == 16) {
cpu.mem.set16(n * 2, parseInt(code, 2));
n++;
}
}
showRegs();
};
var autoflg = false;
var auto = function() {
if (autoflg) {
autoflg = false;
return;
} else {
autoflg = true;
}
var autostep = function() {
if (!autoflg)
return;
if (cpu.step()) {
setTimeout(autostep, 100);
} else {
autoflg = false;
}
showRegs();
};
autostep();
};
get("reset").onclick = reset;
get("step").onclick = function() {
autoflg = false;
cpu.step();
showRegs();
};
get("auto").onclick = auto;
reset();
};
</script>
<style>
#credit {
margin-top: 20px;
}
#prog {
height: 400px;
width: 14em;
display: inline-block;
font-size: 14px;
}
#regs {
height: 400px;
display: inline-block;
font-size: 14px;
vertical-align: top;
}
#main {
padding: .5em;
}
a {
color: #333 !important;
}
</style>
</head>
<body>
<h1>cpuemu - Alpha1</h1>
<div id=main>
使えるマシン語一覧: <a href=http://fukuno.jig.jp/1188>IchigoJamではじめるARMマシン語その3</a><br>
<br><textarea id=prog>0010001100001001
0000001000011011
0101010001011011
0011001100000001
0000101000011010
0010101000001010
1101000111111010
0100011101110000
</textarea>
<div id=regs></div>
<br>
<button id=auto>START</button>
<button id=step>STEP</button>
<button id=reset>RESET</button>
</div>
<div id='credit'>
cpuemu a1 (for <a href=http://ichigojam.net/>IchigoJam</a>)<br>
APP: <a href='http://fukuno.jig.jp/1328'>CC BY fukuno.jig.jp</a><br>
</div>
</body>
<html>