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This commit is contained in:
Kartik K. Agaram 2017-10-12 21:50:38 -07:00
parent 8c0f0989b0
commit ea09c91065
1 changed files with 15 additions and 4 deletions
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19
subx/011add.cc
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@ -1,6 +1,6 @@
//:: add r32 to r/m32
//:: register indirect addressing
:(scenario add_r32_to_rm32)
:(scenario add_r32_to_mem_at_r32)
% Reg[3].i = 0x10;
% Reg[0].i = 0x60;
# word in addresses 0x60-0x63 has value 1
@ -50,9 +50,9 @@ int32_t* effective_address(uint8_t modrm) {
return result;
}
//:: add imm32 to r/m32
//:: register direct addressing
:(scenario add_imm32_to_rm32)
:(scenario add_imm32_to_r32)
% Reg[3].i = 1;
# op ModRM SIB displacement immediate
81 c3 0a 0b 0c 0d # add 0x0d0c0b0a to EBX (reg 3)
@ -85,3 +85,14 @@ case 3:
trace(2, "run") << "effective address is reg " << NUM(rm) << end();
result = &Reg[rm].i;
break;
//:: lots more tests
:(scenario add_imm32_to_mem_at_r32)
% Reg[3].i = 0x60;
% Mem[0x60] = 1;
# op ModR/M SIB displacement immediate
81 03 0a 0b 0c 0d # add 0x0d0c0b0a to *EBX (reg 3)
+run: add imm32 0x0d0c0b0a to effective address
+run: effective address is mem at address 0x60 (reg 3)
+run: storing 0x0d0c0b0b