1
2
3 :(scenario add_r32_to_mem_at_r32)
4 % Reg[3].i = 0x10;
5 % Reg[0].i = 0x60;
6
7 % Mem.at(0x60) = 1;
8
9 01 18
10 +run: add reg 3 to effective address
11 +run: effective address is mem at address 0x60 (reg 0)
12 +run: storing 0x00000011
13
14 :(before "End Mod Special-cases")
15 case 0:
16
17 switch (rm) {
18 default:
19 ¦ trace(2, "run") << "effective address is mem at address 0x" << std::hex << Reg[rm].u << " (reg " << NUM(rm) << ")" << end();
20 ¦ assert(Reg[rm].u + sizeof(int32_t) <= Mem.size());
21 ¦ result = reinterpret_cast<int32_t*>(&Mem.at(Reg[rm].u));
22 ¦ break;
23
24 }
25 break;
26
27
28
29 :(scenario add_mem_at_r32_to_r32)
30 % Reg[0].i = 0x60;
31 % Reg[3].i = 0x10;
32 % Mem.at(0x60) = 1;
33
34 03 18
35 +run: add effective address to reg 3
36 +run: effective address is mem at address 0x60 (reg 0)
37 +run: storing 0x00000011
38
39 :(before "End Single-Byte Opcodes")
40 case 0x03: {
41 uint8_t modrm = next();
42 uint8_t arg1 = (modrm>>3)&0x7;
43 trace(2, "run") << "add effective address to reg " << NUM(arg1) << end();
44 const int32_t* arg2 = effective_address(modrm);
45 BINARY_ARITHMETIC_OP(+, Reg[arg1].i, *arg2);
46 break;
47 }
48
49
50
51 :(scenario sub_r32_from_mem_at_r32)
52 % Reg[0].i = 0x60;
53 % Mem.at(0x60) = 10;
54 % Reg[3].i = 1;
55
56 29 18
57 +run: subtract reg 3 from effective address
58 +run: effective address is mem at address 0x60 (reg 0)
59 +run: storing 0x00000009
60
61
62
63 :(scenario sub_mem_at_r32_from_r32)
64 % Reg[0].i = 0x60;
65 % Mem.at(0x60) = 1;
66 % Reg[3].i = 10;
67
68 2b 18
69 +run: subtract effective address from reg 3
70 +run: effective address is mem at address 0x60 (reg 0)
71 +run: storing 0x00000009
72
73 :(before "End Single-Byte Opcodes")
74 case 0x2b: {
75 uint8_t modrm = next();
76 uint8_t arg1 = (modrm>>3)&0x7;
77 trace(2, "run") << "subtract effective address from reg " << NUM(arg1) << end();
78 const int32_t* arg2 = effective_address(modrm);
79 BINARY_ARITHMETIC_OP(-, Reg[arg1].i, *arg2);
80 break;
81 }