diff options
| author | Andreas Kling <kling@serenityos.org> | 2020-07-18 00:14:29 +0200 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2020-07-18 00:25:02 +0200 |
| commit | c3441719eac25f3310974436a849d6bc92c7cfdd (patch) | |
| tree | 8f5db163f9be3fe3c48db1f76966f6f859a6e65a | |
| parent | d321dc0a7401e7fa0069df014927ed543cb21fd7 (diff) | |
| download | serenity-c3441719eac25f3310974436a849d6bc92c7cfdd.zip | |
UserspaceEmulator: Implement the JCXZ instruction
| -rw-r--r-- | DevTools/UserspaceEmulator/SoftCPU.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/DevTools/UserspaceEmulator/SoftCPU.cpp b/DevTools/UserspaceEmulator/SoftCPU.cpp index a6d23af9f2..d65dcad0e6 100644 --- a/DevTools/UserspaceEmulator/SoftCPU.cpp +++ b/DevTools/UserspaceEmulator/SoftCPU.cpp @@ -1289,7 +1289,13 @@ void SoftCPU::IN_AX_imm8(const X86::Instruction&) { TODO(); } void SoftCPU::IN_EAX_DX(const X86::Instruction&) { TODO(); } void SoftCPU::IN_EAX_imm8(const X86::Instruction&) { TODO(); } void SoftCPU::IRET(const X86::Instruction&) { TODO(); } -void SoftCPU::JCXZ_imm8(const X86::Instruction&) { TODO(); } + +void SoftCPU::JCXZ_imm8(const X86::Instruction& insn) +{ + if ((insn.a32() && ecx() == 0) || (!insn.a32() && cx() == 0)) + set_eip(eip() + (i8)insn.imm8()); +} + void SoftCPU::JMP_FAR_mem16(const X86::Instruction&) { TODO(); } void SoftCPU::JMP_FAR_mem32(const X86::Instruction&) { TODO(); } void SoftCPU::JMP_RM16(const X86::Instruction&) { TODO(); } |