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author | Kartik K. Agaram <vc@akkartik.com> | 2017-10-13 01:13:33 -0700 |
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committer | Kartik K. Agaram <vc@akkartik.com> | 2017-10-13 01:13:33 -0700 |
commit | 8745e7456a4a14e0c0220fe8c6a5f988fdd39a29 (patch) | |
tree | 23fab7b98a1d50e455e89da0634806958c84fd7e /subx/011direct_addressing.cc | |
parent | ce315187881b625354ab3279f470a3e771e61525 (diff) | |
download | mu-8745e7456a4a14e0c0220fe8c6a5f988fdd39a29.tar.gz |
4057
Diffstat (limited to 'subx/011direct_addressing.cc')
-rw-r--r-- | subx/011direct_addressing.cc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/subx/011direct_addressing.cc b/subx/011direct_addressing.cc index bbd482d4..3286cbea 100644 --- a/subx/011direct_addressing.cc +++ b/subx/011direct_addressing.cc @@ -104,3 +104,24 @@ case 0x09: { // or r32 with r/m32 BINARY_BITWISE_OP(|, *arg1, Reg[arg2].u); break; } + +//:: xor + +:(scenario xor_r32_with_r32) +% Reg[0].i = 0x0a0b0c0d; +% Reg[3].i = 0xaabbc0d0; +# op ModR/M SIB displacement immediate + 31 d8 # xor EBX (reg 3) with destination EAX (reg 0) ++run: xor reg 3 with effective address ++run: effective address is reg 0 ++run: storing 0xa0b0ccdd + +:(before "End Single-Byte Opcodes") +case 0x31: { // xor r32 with r/m32 + uint8_t modrm = next(); + uint8_t arg2 = (modrm>>3)&0x7; + trace(2, "run") << "xor reg " << NUM(arg2) << " with effective address" << end(); + int32_t* arg1 = effective_address(modrm); + BINARY_BITWISE_OP(^, *arg1, Reg[arg2].u); + break; +} |