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| author | Andreas Kling <kling@serenityos.org> | 2020-07-12 14:45:02 +0200 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2020-07-12 14:45:02 +0200 |
| commit | 2d44f4526a9830468f875d8e13e488bc022b7881 (patch) | |
| tree | 2244608fba3c0aa77dbe10b2430b4d2cc838f731 /DevTools | |
| parent | ed57efff4ffdd91647d457f191bb830a192184d1 (diff) | |
| download | serenity-2d44f4526a9830468f875d8e13e488bc022b7881.zip | |
UserspaceEmulator: Implement MOVSB/MOVSW/MOVSD
Diffstat (limited to 'DevTools')
| -rw-r--r-- | DevTools/UserspaceEmulator/SoftCPU.cpp | 63 |
1 files changed, 60 insertions, 3 deletions
diff --git a/DevTools/UserspaceEmulator/SoftCPU.cpp b/DevTools/UserspaceEmulator/SoftCPU.cpp index fc1c244759..ad1d4db67f 100644 --- a/DevTools/UserspaceEmulator/SoftCPU.cpp +++ b/DevTools/UserspaceEmulator/SoftCPU.cpp @@ -973,9 +973,66 @@ void SoftCPU::LSL_reg32_RM32(const X86::Instruction&) { TODO(); } void SoftCPU::LSS_reg16_mem16(const X86::Instruction&) { TODO(); } void SoftCPU::LSS_reg32_mem32(const X86::Instruction&) { TODO(); } void SoftCPU::LTR_RM16(const X86::Instruction&) { TODO(); } -void SoftCPU::MOVSB(const X86::Instruction&) { TODO(); } -void SoftCPU::MOVSD(const X86::Instruction&) { TODO(); } -void SoftCPU::MOVSW(const X86::Instruction&) { TODO(); } + +void SoftCPU::MOVSB(const X86::Instruction& insn) +{ + auto src_segment = segment(insn.segment_prefix().value_or(X86::SegmentRegister::DS)); + if (insn.has_address_size_override_prefix()) { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory8({ src_segment, si() }); + write_memory8({ es(), di() }, src); + set_di(di() + (df() ? -1 : 1)); + set_si(si() + (df() ? -1 : 1)); + }); + } else { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory8({ src_segment, esi() }); + write_memory8({ es(), edi() }, src); + set_edi(edi() + (df() ? -1 : 1)); + set_esi(esi() + (df() ? -1 : 1)); + }); + } +} + +void SoftCPU::MOVSD(const X86::Instruction& insn) +{ + auto src_segment = segment(insn.segment_prefix().value_or(X86::SegmentRegister::DS)); + if (insn.has_address_size_override_prefix()) { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory32({ src_segment, si() }); + write_memory32({ es(), di() }, src); + set_di(di() + (df() ? -1 : 1)); + set_si(si() + (df() ? -1 : 1)); + }); + } else { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory32({ src_segment, esi() }); + write_memory32({ es(), edi() }, src); + set_edi(edi() + (df() ? -1 : 1)); + set_esi(esi() + (df() ? -1 : 1)); + }); + } +} + +void SoftCPU::MOVSW(const X86::Instruction& insn) +{ + auto src_segment = segment(insn.segment_prefix().value_or(X86::SegmentRegister::DS)); + if (insn.has_address_size_override_prefix()) { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory16({ src_segment, si() }); + write_memory16({ es(), di() }, src); + set_di(di() + (df() ? -1 : 1)); + set_si(si() + (df() ? -1 : 1)); + }); + } else { + do_once_or_repeat<false>(insn, [&] { + auto src = read_memory16({ src_segment, esi() }); + write_memory16({ es(), edi() }, src); + set_edi(edi() + (df() ? -1 : 1)); + set_esi(esi() + (df() ? -1 : 1)); + }); + } +} void SoftCPU::MOVSX_reg16_RM8(const X86::Instruction&) { TODO(); } void SoftCPU::MOVSX_reg32_RM16(const X86::Instruction&) { TODO(); } void SoftCPU::MOVSX_reg32_RM8(const X86::Instruction&) { TODO(); } |