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UserspaceEmulator: Add 16-bit PUSH/POP instructions

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This commit is contained in:
Andreas Kling 2020-07-17 17:28:11 +02:00
parent 75500b449c
commit 86a7820ad7
2 changed files with 41 additions and 5 deletions
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43
DevTools/UserspaceEmulator/SoftCPU.cpp
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@ -176,6 +176,19 @@ u32 SoftCPU::pop32()
return value;
}
void SoftCPU::push16(u16 value)
{
set_esp(esp() - sizeof(value));
write_memory16({ ss(), esp() }, value);
}
u16 SoftCPU::pop16()
{
auto value = read_memory16({ ss(), esp() });
set_esp(esp() + sizeof(value));
return value;
}
template<bool check_zf, typename Callback>
void SoftCPU::do_once_or_repeat(const X86::Instruction& insn, Callback callback)
{
@ -1615,10 +1628,23 @@ void SoftCPU::POP_DS(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_ES(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_FS(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_GS(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_RM16(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_RM32(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_RM16(const X86::Instruction& insn)
{
insn.modrm().write16(*this, insn, pop16());
}
void SoftCPU::POP_RM32(const X86::Instruction& insn)
{
insn.modrm().write32(*this, insn, pop32());
}
void SoftCPU::POP_SS(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_reg16(const X86::Instruction&) { TODO(); }
void SoftCPU::POP_reg16(const X86::Instruction& insn)
{
gpr16(insn.reg16()) = pop16();
}
void SoftCPU::POP_reg32(const X86::Instruction& insn)
{
@ -1648,7 +1674,11 @@ void SoftCPU::PUSH_RM32(const X86::Instruction& insn)
void SoftCPU::PUSH_SP_8086_80186(const X86::Instruction&) { TODO(); }
void SoftCPU::PUSH_SS(const X86::Instruction&) { TODO(); }
void SoftCPU::PUSH_imm16(const X86::Instruction&) { TODO(); }
void SoftCPU::PUSH_imm16(const X86::Instruction& insn)
{
push16(insn.imm16());
}
void SoftCPU::PUSH_imm32(const X86::Instruction& insn)
{
@ -1661,7 +1691,10 @@ void SoftCPU::PUSH_imm8(const X86::Instruction& insn)
push32(sign_extended_to<i32>(insn.imm8()));
}
void SoftCPU::PUSH_reg16(const X86::Instruction&) { TODO(); }
void SoftCPU::PUSH_reg16(const X86::Instruction& insn)
{
push16(gpr16(insn.reg16()));
}
void SoftCPU::PUSH_reg32(const X86::Instruction& insn)
{