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| author | Kartik K. Agaram <vc@akkartik.com> | 2017-10-12 21:50:38 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2017-10-12 21:50:38 -0700 |
| commit | ea09c910658e04784488d680111cd91cef1ab514 (patch) | |
| tree | 06e29ab7a601fa38d0c5d0493b2ba51bce75bb85 /subx/011add.cc | |
| parent | 8c0f0989b0ab4243a34ef716cbc68bde5465194b (diff) | |
| download | mu-ea09c910658e04784488d680111cd91cef1ab514.tar.gz | |
4042
Diffstat (limited to 'subx/011add.cc')
| -rw-r--r-- | subx/011add.cc | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/subx/011add.cc b/subx/011add.cc index 8c52963f..f0f37f85 100644 --- a/subx/011add.cc +++ b/subx/011add.cc @@ -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 |