mirror of https://github.com/chyyuu/v8-cpu.git
Add support to timer and timer interrupts
Signed-off-by: Junjie Mao <junjie.mao@enight.me>
This commit is contained in:
Junjie Mao
parent
3536e7e27b
commit
bbbbf66ebb
21
index.html
21
index.html
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@ -35,7 +35,7 @@
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<textarea id="sourceCode"
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class="form-control source-code"
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style="margin-bottom:5px;"
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rows="35"
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rows="30"
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tab-support
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select-line
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ng-model="code"></textarea>
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@ -52,11 +52,10 @@
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<h4 class="panel-title">CPU & Memory</h4>
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</div>
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<div class="panel-body">
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<p class="text-muted">Registers</p>
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<p class="text-muted">General Registers</p>
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<table class="table table-condensed table-striped">
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<thead>
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<tr>
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<th style="text-align:center">IP</th>
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<th style="text-align:center">0</th>
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<th style="text-align:center">1</th>
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<th style="text-align:center">2</th>
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@ -77,7 +76,6 @@
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</thead>
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<tbody>
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<tr style="text-align:center;" class="source-code">
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<td><div style="margin:auto;" class="marker marker-ip"><small>{{ cpu.ip | number:displayHex }}</small></div></td>
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<td><div style="margin:auto;" ng-class="displayA && 'marker marker-a'"><small>{{ cpu.gpr[0] | number:displayHex }}</small></div></td>
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<td><div style="margin:auto;" ng-class="displayB && 'marker marker-b'"><small>{{ cpu.gpr[1] | number:displayHex }}</small></div></td>
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<td><div style="margin:auto;" ng-class="displayC && 'marker marker-c'"><small>{{ cpu.gpr[2] | number:displayHex }}</small></div></td>
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@ -95,7 +93,20 @@
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<td><div style="margin:auto;" ng-class="displayD && 'marker marker-d'"><small>{{ cpu.gpr[14] | number:displayHex }}</small></div></td>
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<td><div style="margin:auto;" ng-class="displayD && 'marker marker-d'"><small>{{ cpu.gpr[15] | number:displayHex }}</small></div></td>
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</tr>
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</tbody>
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</tbody>
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</table>
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<p class="text-muted">Other Registers</p>
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<table class="table table-condensed table-striped">
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<tbody>
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<tr>
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<td style="text-align:left">IP <font color="E81F1F">{{ cpu.status }}</font> </td>
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<td style="text-align:center;" class="source-code"><div style="margin:auto;" class="marker marker-ip"><small>{{ cpu.ip | number:displayHex }}</small></div></td>
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</tr>
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<tr>
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<td style="text-align:left">Timer Countdown</td>
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<td style="text-align:center;" class="source-code"><div style="margin:auto;"><small>{{ cpu.countdown | number:displayHex }}</small></div></td>
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</tr>
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</tbody>
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</table>
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<p class="text-muted">RAM</p>
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<div style="width:29em;" class="source-code">
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@ -17,67 +17,93 @@ app.service('cpu', ['opcodes', 'memory', function(opcodes, memory) {
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}
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};
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var readReg = function(id) {
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return self.gpr[id];
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};
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var writeReg = function(id, val) {
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self.gpr[id] = val;
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if (id == 15) {
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self.updateTimer = true;
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if (val > 0) {
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self.countdown = val;
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} else {
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self.countdown = 0;
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}
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}
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};
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self.updateTimer = false;
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self.status = '';
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var instr = [memory.load(self.ip), memory.load(self.ip + 1)];
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var opcode = instr[0] >> 4;
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var regDest = instr[0] & 0x0F, regSource1 = instr[1] >> 4, regSource2 = instr[1] & 0x0F;
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var mem = instr[1], num = instr[1];
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self.ip = self.ip + 2;
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self.ip = (self.ip + 2) & 0xFF;
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switch(opcode) {
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case opcodes.NONE:
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self.ip = self.ip - 2;
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return false; // Abort step
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case opcodes.LOAD_FROM_MEMORY:
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self.gpr[regDest] = memory.load(mem);
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writeReg(regDest, memory.load(mem));
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break;
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case opcodes.LOAD_WITH_CONSTANT:
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self.gpr[regDest] = num;
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writeReg(regDest, num);
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break;
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case opcodes.STORE_TO_MEMORY:
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memory.store(mem, self.gpr[regDest]);
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memory.store(mem, readReg(regDest));
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break;
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case opcodes.MOVE:
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self.gpr[regSource2] = self.gpr[regSource1];
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writeReg(regSource2, readReg(regSource1));
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break;
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case opcodes.ADD_INT:
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self.gpr[regDest] = (self.gpr[regSource1] + self.gpr[regSource2]) & 0xFF;
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writeReg(regDest, (readReg(regSource1) + readReg(regSource2)) & 0xFF);
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break;
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case opcodes.ADD_FLOAT:
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// TODO
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break;
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case opcodes.OR:
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self.gpr[regDest] = self.gpr[regSource1] | self.gpr[regSource2];
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writeReg(regDest, readReg(regSource1) | readReg(regSource2));
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break;
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case opcodes.AND:
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self.gpr[regDest] = self.gpr[regSource1] & self.gpr[regSource2];
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writeReg(regDest, readReg(regSource1) & readReg(regSource2));
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break;
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case opcodes.XOR:
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self.gpr[regDest] = self.gpr[regSource1] ^ self.gpr[regSource2];
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writeReg(regDest, readReg(regSource1) ^ readReg(regSource2));
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break;
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case opcodes.ROTATE:
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var delta = num % 8, val = self.gpr[regDest];
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self.gpr[regDest] = (val >> delta) + ((val & ((1 << delta) - 1)) << (8 - delta));
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var delta = num % 8, val = readReg(regDest);
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writeReg(regDest, (val >> delta) + ((val & ((1 << delta) - 1)) << (8 - delta)));
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break;
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case opcodes.JUMP_IF_EQUAL:
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if (self.gpr[regDest] == self.gpr[0]) {
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if (readReg(regDest) == readReg(0)) {
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self.ip = mem;
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}
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break;
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case opcodes.HALT:
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self.ip = self.ip - 2;
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self.ip = (self.ip - 2) & 0xFF;
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return false;
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case opcodes.LOAD_FROM_POINTER:
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self.gpr[regDest] = memory.load(self.gpr[regSource2]);
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writeReg(regDest, memory.load(readReg(regSource2)));
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break;
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case opcodes.STORE_TO_POINTER:
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memory.store(self.gpr[regSource2], self.gpr[regDest]);
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memory.store(readReg(regSource2), readReg(regDest));
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break;
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case opcodes.JUMP_IF_LESS:
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if (byteToNumber(self.gpr[regDest]) < byteToNumber(self.gpr[0])) { // TODO
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if (byteToNumber(readReg(regDest)) < byteToNumber(readReg(0))) {
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self.ip = mem;
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}
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break;
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}
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if (self.countdown > 0 && !self.updateTimer) {
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self.countdown -= 1;
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if (self.countdown === 0) {
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memory.store(0xFE, self.ip);
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self.ip = 0x80;
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self.countdown = readReg(15);
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self.status = '(Interrupted!)';
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}
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}
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return true;
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},
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reset: function() {
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@ -85,6 +111,10 @@ app.service('cpu', ['opcodes', 'memory', function(opcodes, memory) {
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self.gpr = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
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self.ip = 0;
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self.status = '';
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self.countdown = 0;
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self.updateTimer = false;
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}
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};
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@ -150,12 +150,8 @@ app.controller('Ctrl', ['$document', '$scope', '$timeout', 'cpu', 'memory', 'ass
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};
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$scope.getMemoryCellCss = function (index) {
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if (index >= $scope.outputStartIndex) {
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return 'output-bg';
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} else if ($scope.isInstruction(index)) {
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if ($scope.isInstruction(index)) {
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return 'instr-bg';
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} else if (index > cpu.sp && index <= cpu.maxSP) {
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return 'stack-bg';
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} else {
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return '';
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}
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