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| author | Andreas Kling <kling@serenityos.org> | 2020-07-18 00:13:31 +0200 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2020-07-18 00:25:02 +0200 |
| commit | d321dc0a7401e7fa0069df014927ed543cb21fd7 (patch) | |
| tree | 213a4898dad17ee3214fb1bc1adeb9c4f8af2830 | |
| parent | 8ec8ec8b1c1fab6d48277b80fd187059b4a45be4 (diff) | |
| download | serenity-d321dc0a7401e7fa0069df014927ed543cb21fd7.zip | |
UserspaceEmulator: Fix too-wide accumulator used in 8/16 bit CMPXCHG
| -rw-r--r-- | DevTools/UserspaceEmulator/SoftCPU.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/DevTools/UserspaceEmulator/SoftCPU.cpp b/DevTools/UserspaceEmulator/SoftCPU.cpp index 4e2d6bc817..a6d23af9f2 100644 --- a/DevTools/UserspaceEmulator/SoftCPU.cpp +++ b/DevTools/UserspaceEmulator/SoftCPU.cpp @@ -1074,7 +1074,7 @@ void SoftCPU::CMPSW(const X86::Instruction& insn) void SoftCPU::CMPXCHG_RM16_reg16(const X86::Instruction& insn) { auto current = insn.modrm().read16(*this, insn); - if (current == eax()) { + if (current == ax()) { set_zf(true); insn.modrm().write16(*this, insn, gpr16(insn.reg16())); } else { @@ -1098,7 +1098,7 @@ void SoftCPU::CMPXCHG_RM32_reg32(const X86::Instruction& insn) void SoftCPU::CMPXCHG_RM8_reg8(const X86::Instruction& insn) { auto current = insn.modrm().read8(*this, insn); - if (current == eax()) { + if (current == al()) { set_zf(true); insn.modrm().write8(*this, insn, gpr8(insn.reg8())); } else { |