/
vm.instruction.stream.sista.js
167 lines (161 loc) · 9.47 KB
/
vm.instruction.stream.sista.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
"use strict";
/*
* Copyright (c) 2013-2024 Vanessa Freudenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
Squeak.InstructionStream.subclass('Squeak.InstructionStreamSista',
'decoding', {
interpretNextInstructionFor: function(client) {
return this.interpretNextInstructionExtFor(client, 0, 0);
},
interpretNextInstructionExtFor: function(client, extA, extB) {
var Squeak = this.Squeak; // avoid dynamic lookup of "Squeak" in Lively
// Send to the argument, client, a message that specifies the type of the next instruction.
var b = this.method.bytes[this.pc++];
switch (b) {
case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: case 0x06: case 0x07:
case 0x08: case 0x09: case 0x0A: case 0x0B: case 0x0C: case 0x0D: case 0x0E: case 0x0F:
return client.pushReceiverVariable(b&0xF);
case 0x10: case 0x11: case 0x12: case 0x13: case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1A: case 0x1B: case 0x1C: case 0x1D: case 0x1E: case 0x1F:
return client.pushLiteralVariable(this.method.methodGetLiteral(b&0xF));
case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x26: case 0x27:
case 0x28: case 0x29: case 0x2A: case 0x2B: case 0x2C: case 0x2D: case 0x2E: case 0x2F:
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37:
case 0x38: case 0x39: case 0x3A: case 0x3B: case 0x3C: case 0x3D: case 0x3E: case 0x3F:
return client.pushConstant(this.method.methodGetLiteral(b&0x1F));
case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
return client.pushTemporaryVariable(b&0xF);
case 0x48: case 0x49: case 0x4A: case 0x4B:
return client.pushTemporaryVariable((b&0x3)+8);
case 0x4C: return client.pushReceiver();
case 0x4D: return client.pushConstant(this.vm.trueObj);
case 0x4E: return client.pushConstant(this.vm.falseObj);
case 0x4F: return client.pushConstant(this.vm.nilObj);
case 0x50: return client.pushConstant(0);
case 0x51: return client.pushConstant(1);
case 0x52: return client.pushActiveContext();
case 0x53: return client.doDup();
case 0x58: return client.methodReturnReceiver();
case 0x59: return client.methodReturnConstant(this.vm.trueObj);
case 0x5A: return client.methodReturnConstant(this.vm.falseObj);
case 0x5B: return client.methodReturnConstant(this.vm.nilObj);
case 0x5C: return client.methodReturnTop();
case 0x5D: return client.blockReturnConstant(this.vm.nilObj);
case 0x5E: if (extA===0) return client.blockReturnTop(); else break;
case 0x5F: return client.nop();
case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x65: case 0x66: case 0x67:
case 0x68: case 0x69: case 0x6A: case 0x6B: case 0x6C: case 0x6D: case 0x6E: case 0x6F:
case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77:
case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F:
return client.send(this.vm.specialSelectors[2 * (b - 0x60)],
this.vm.specialSelectors[2 * (b - 0x60) + 1], false);
case 0x80: case 0x81: case 0x82: case 0x83: case 0x84: case 0x85: case 0x86: case 0x87:
case 0x88: case 0x89: case 0x8A: case 0x8B: case 0x8C: case 0x8D: case 0x8E: case 0x8F:
return client.send(this.method.methodGetLiteral(b&0xF), 0, false);
case 0x90: case 0x91: case 0x92: case 0x93: case 0x94: case 0x95: case 0x96: case 0x97:
case 0x98: case 0x99: case 0x9A: case 0x9B: case 0x9C: case 0x9D: case 0x9E: case 0x9F:
return client.send(this.method.methodGetLiteral(b&0xF), 1, false);
case 0xA0: case 0xA1: case 0xA2: case 0xA3: case 0xA4: case 0xA5: case 0xA6: case 0xA7:
case 0xA8: case 0xA9: case 0xAA: case 0xAB: case 0xAC: case 0xAD: case 0xAE: case 0xAF:
return client.send(this.method.methodGetLiteral(b&0xF), 2, false);
case 0xB0: case 0xB1: case 0xB2: case 0xB3: case 0xB4: case 0xB5: case 0xB6: case 0xB7:
return client.jump((b&7) + 1);
case 0xB8: case 0xB9: case 0xBA: case 0xBB: case 0xBC: case 0xBD: case 0xBE: case 0xBF:
return client.jumpIf(true, (b&7) + 1);
case 0xC0: case 0xC1: case 0xC2: case 0xC3: case 0xC4: case 0xC5: case 0xC6: case 0xC7:
return client.jumpIf(false, (b&7) + 1);
case 0xC8: case 0xC9: case 0xCA: case 0xCB: case 0xCC: case 0xCD: case 0xCE: case 0xCF:
return client.popIntoReceiverVariable(b&7)
case 0xD0: case 0xD1: case 0xD2: case 0xD3: case 0xD4: case 0xD5: case 0xD6: case 0xD7:
return client.popIntoTemporaryVariable(b - 0xD0);
case 0xD8: return client.doPop();
}
var b2 = this.method.bytes[this.pc++];
switch (b) {
case 0xE0: return this.interpretNextInstructionExtFor(client, (extA << 8) + b2, extB);
case 0xE1: return this.interpretNextInstructionExtFor(client, extA, (extB << 8) + (b2 < 128 ? b2 : b2-256));
case 0xE2:
return client.pushReceiverVariable(b2 + (extA << 8));
case 0xE3:
return client.pushLiteralVariable(this.method.methodGetLiteral(b2 + (extA << 8)));
case 0xE4:
return client.pushConstant(this.method.methodGetLiteral(b2 + (extA << 8)));
case 0xE5:
return client.pushTemporaryVariable(b2);
case 0xE7: {
return b2 < 128 ? client.pushNewArray(b2) : client.popIntoNewArray(b2 - 128);
}
case 0xE8: return client.pushConstant(b2 + (extB << 8));
case 0xE9:
var unicode = b2 + (extB << 8);
return client.pushConstant("$" + String.fromCodePoint(unicode) + " (" + unicode + ")");
case 0xEA: return client.send(this.method.methodGetSelector((b2 >> 3) + (extA << 5)), (b2 & 7) + (extB << 3), false);
case 0xEB:
var literal = this.method.methodGetSelector((b2 >> 3) + (extA << 5));
if (extB >= 64) {
return client.sendSuperDirected(literal);
} else {
return client.send(literal, (b2 & 7) + (extB << 3), true);
}
case 0xED:
return client.jump(b2 + (extB << 8));
case 0xEE:
return client.jumpIf(true, b2 + (extB << 8));
case 0xEF:
return client.jumpIf(false, b2 + (extB << 8));
case 0xF0:
return client.popIntoReceiverVariable(b2 + (extA << 8));
case 0xF1:
return client.popIntoLiteralVariable(this.method.methodGetLiteral(b2 + (extA << 8)));
case 0xF2:
return client.popIntoTemporaryVariable(b2);
case 0xF3:
return client.storeIntoReceiverVariable(b2 + (extA << 8));
case 0xF4:
return client.storeIntoLiteralVariable(this.method.methodGetLiteral(b2 + (extA << 8)));
case 0xF5:
return client.storeIntoTemporaryVariable(b2);
}
var b3 = this.method.bytes[this.pc++];
switch (b) {
case 0xF8: return client.callPrimitive(b2 + (b3 << 8));
case 0xF9: {
var literalIndex = b2 + (extA << 8),
numCopied = b3 & 63,
compiledBlock = this.method.methodGetLiteral(literalIndex);
return client.pushFullClosure(literalIndex, numCopied, compiledBlock.methodNumArgs());
}
case 0xFA: {
var numArgs = (b2 & 7) + this.mod(extA, 16) * 8,
numCopied = (b2 >> 3 & 0x7) + this.div(extA, 16) * 8,
blockSize = b3 + (extB << 8);
return client.pushClosureCopy(numCopied, numArgs, blockSize);
}
case 0xFB:
return client.pushRemoteTemp(b2, b3);
case 0xFC:
return client.storeIntoRemoteTemp(b2, b3);
case 0xFD:
return client.popIntoRemoteTemp(b2, b3);
}
throw Error("Unknown bytecode: " + b);
}
});