locked_opcodes.isa revision 6098 
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54// Authors: Gabe Black
55
56////////////////////////////////////////////////////////////////////
57//
58// Decode opcodes with the lock prefix. Opcodes which shouldn't have that
59// prefix should effectively decode to UD2.
60//
61
62// All the memory references in these instructions happen through modrm bytes.
63// We therefore only need to make sure the modrm byte encodes a memory
64// reference to make sure these are the memory forms of these instructions.
650x1: decode MODRM_MOD {
66    format Inst {
67        0x3: UD2();
68        default: decode OPCODE_NUM {
69            0x1: decode OPCODE_OP_TOP5 {
70                0x00: decode OPCODE_OP_BOTTOM3 {
71                    default: MultiInst::ADD_LOCKED(OPCODE_OP_BOTTOM3,
72                                            [Mb,Gb], [Mv,Gv]);
73                }
74                0x01: decode OPCODE_OP_BOTTOM3 {
75                    default: MultiInst::OR_LOCKED(OPCODE_OP_BOTTOM3,
76                                           [Mb,Gb], [Mv,Gv]);
77                }
78                0x02: decode OPCODE_OP_BOTTOM3 {
79                    default: MultiInst::ADC_LOCKED(OPCODE_OP_BOTTOM3,
80                                            [Mb,Gb], [Mv,Gv]);
81                }
82                0x03: decode OPCODE_OP_BOTTOM3 {
83                    default: MultiInst::SBB_LOCKED(OPCODE_OP_BOTTOM3,
84                                            [Mb,Gb], [Mv,Gv]);
85                }
86                0x04: decode OPCODE_OP_BOTTOM3 {
87                    default: MultiInst::AND_LOCKED(OPCODE_OP_BOTTOM3,
88                                            [Mb,Gb], [Mv,Gv]);
89                }
90                0x05: decode OPCODE_OP_BOTTOM3 {
91                    default: MultiInst::SUB_LOCKED(OPCODE_OP_BOTTOM3,
92                                            [Mb,Gb], [Mv,Gv]);
93                }
94                0x06: decode OPCODE_OP_BOTTOM3 {
95                    default: MultiInst::XOR_LOCKED(OPCODE_OP_BOTTOM3,
96                                            [Mb,Gb], [Mv,Gv]);
97                }
98                0x10: decode OPCODE_OP_BOTTOM3 {
99                    0x0: decode MODRM_REG {
100                        0x0: ADD_LOCKED(Mb,Ib);
101                        0x1: OR_LOCKED(Mb,Ib);
102                        0x2: ADC_LOCKED(Mb,Ib);
103                        0x3: SBB_LOCKED(Mb,Ib);
104                        0x4: AND_LOCKED(Mb,Ib);
105                        0x5: SUB_LOCKED(Mb,Ib);
106                        0x6: XOR_LOCKED(Mb,Ib);
107                    }
108                    0x1: decode MODRM_REG {
109                        0x0: ADD_LOCKED(Mv,Iz);
110                        0x1: OR_LOCKED(Mv,Iz);
111                        0x2: ADC_LOCKED(Mv,Iz);
112                        0x3: SBB_LOCKED(Mv,Iz);
113                        0x4: AND_LOCKED(Mv,Iz);
114                        0x5: SUB_LOCKED(Mv,Iz);
115                        0x6: XOR_LOCKED(Mv,Iz);
116                    }
117                    0x2: decode MODE_SUBMODE {
118                        0x0: UD2();
119                        default: decode MODRM_REG {
120                            0x0: ADD_LOCKED(Mb,Ib);
121                            0x1: OR_LOCKED(Mb,Ib);
122                            0x2: ADC_LOCKED(Mb,Ib);
123                            0x3: SBB_LOCKED(Mb,Ib);
124                            0x4: AND_LOCKED(Mb,Ib);
125                            0x5: SUB_LOCKED(Mb,Ib);
126                            0x6: XOR_LOCKED(Mb,Ib);
127                        }
128                    }
129                    //0x3: group1_Ev_Ib();
130                    0x3: decode MODRM_REG {
131                        0x0: ADD_LOCKED(Mv,Ib);
132                        0x1: OR_LOCKED(Mv,Ib);
133                        0x2: ADC_LOCKED(Mv,Ib);
134                        0x3: SBB_LOCKED(Mv,Ib);
135                        0x4: AND_LOCKED(Mv,Ib);
136                        0x5: SUB_LOCKED(Mv,Ib);
137                        0x6: XOR_LOCKED(Mv,Ib);
138                    }
139                    0x6: XCHG_LOCKED(Mb,Gb);
140                    0x7: XCHG_LOCKED(Mv,Gv);
141                }
142                0x1E: decode OPCODE_OP_BOTTOM3 {
143                    //0x6: group3_Eb();
144                    0x6: decode MODRM_REG {
145                        0x2: NOT_LOCKED(Mb);
146                        0x3: NEG_LOCKED(Mb);
147                    }
148                    //0x7: group3_Ev();
149                    0x7: decode MODRM_REG {
150                        0x2: NOT_LOCKED(Mv);
151                        0x3: NEG_LOCKED(Mv);
152                    }
153                }
154                0x1F: decode OPCODE_OP_BOTTOM3 {
155                    0x6: decode MODRM_REG {
156                        0x0: INC_LOCKED(Mb);
157                        0x1: DEC_LOCKED(Mb);
158                        default: UD2();
159                    }
160                    //0x7: group5();
161                    0x7: decode MODRM_REG {
162                        0x0: INC_LOCKED(Mv);
163                        0x1: DEC_LOCKED(Mv);
164                    }
165                }
166            }
167            0x2: decode OPCODE_PREFIXA {
168                0x0F: decode OPCODE_OP_TOP5 {
169                    0x15: decode OPCODE_OP_BOTTOM3 {
170                        0x3: BTS_LOCKED(Mv,Gv);
171                    }
172                    0x16: decode OPCODE_OP_BOTTOM3 {
173                        0x0: CMPXCHG_LOCKED(Mb,Gb);
174                        0x1: CMPXCHG_LOCKED(Mv,Gv);
175                        0x3: BTR_LOCKED(Mv,Gv);
176                    }
177                    0x17: decode OPCODE_OP_BOTTOM3 {
178                        0x2: decode MODRM_REG {
179                            0x5: BTS_LOCKED(Mv,Ib);
180                            0x6: BTR_LOCKED(Mv,Ib);
181                            0x7: BTC_LOCKED(Mv,Ib);
182                        }
183                        0x3: BTC_LOCKED(Mv,Gv);
184                    }
185                    0x18: decode OPCODE_OP_BOTTOM3 {
186                        0x0: XADD_LOCKED(Mb,Gb);
187                        0x1: XADD_LOCKED(Mv,Gv);
188                        //0x7: group9();
189                        0x7: decode MODRM_REG {
190                            0x1: WarnUnimpl::cmpxchg_Mq_LOCKED();
191                        }
192                    }
193                }
194                default: M5InternalError::error(
195                    {{"Unexpected first opcode byte in two byte opcode!"}});
196            }
197        }
198    }
199}
200