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UserspaceEmulator: Implement the SHL family of instructions

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This commit is contained in:
Andreas Kling 2020-07-11 23:32:44 +02:00
parent bfacb9583a
commit 775bc158ba
1 changed files with 83 additions and 9 deletions
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92
DevTools/UserspaceEmulator/SoftCPU.cpp
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@ -379,6 +379,34 @@ static T op_shr(SoftCPU& cpu, T data, u8 steps)
return result;
}
template<typename T>
static T op_shl(SoftCPU& cpu, T data, u8 steps)
{
if (steps == 0)
return data;
u32 result = 0;
u32 new_flags = 0;
if constexpr (sizeof(T) == 4)
asm volatile("shll %%cl, %%eax\n" ::"a"(data), "c"(steps));
else if constexpr (sizeof(T) == 2)
asm volatile("shlw %%cl, %%ax\n" ::"a"(data), "c"(steps));
else if constexpr (sizeof(T) == 1)
asm volatile("shlb %%cl, %%al\n" ::"a"(data), "c"(steps));
asm volatile(
"mov %%eax, %%ebx\n"
: "=b"(result));
asm volatile(
"pushf\n"
"pop %%eax"
: "=a"(new_flags));
cpu.set_flags_oszapc(new_flags);
return result;
}
template<bool update_dest, typename Op>
void SoftCPU::generic_AL_imm8(Op op, const X86::Instruction& insn)
{
@ -1143,15 +1171,61 @@ void SoftCPU::SHLD_RM16_reg16_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHLD_RM16_reg16_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHLD_RM32_reg32_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHLD_RM32_reg32_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM16_1(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM16_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM16_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM32_1(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM32_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM32_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM8_1(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM8_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM8_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHL_RM16_1(const X86::Instruction& insn)
{
auto data = insn.modrm().read16(*this, insn);
insn.modrm().write16(*this, insn, op_shl(*this, data, 1));
}
void SoftCPU::SHL_RM16_CL(const X86::Instruction& insn)
{
auto data = insn.modrm().read16(*this, insn);
insn.modrm().write16(*this, insn, op_shl(*this, data, cl()));
}
void SoftCPU::SHL_RM16_imm8(const X86::Instruction& insn)
{
auto data = insn.modrm().read16(*this, insn);
insn.modrm().write16(*this, insn, op_shl(*this, data, insn.imm8()));
}
void SoftCPU::SHL_RM32_1(const X86::Instruction& insn)
{
auto data = insn.modrm().read32(*this, insn);
insn.modrm().write32(*this, insn, op_shl(*this, data, 1));
}
void SoftCPU::SHL_RM32_CL(const X86::Instruction& insn)
{
auto data = insn.modrm().read32(*this, insn);
insn.modrm().write32(*this, insn, op_shl(*this, data, cl()));
}
void SoftCPU::SHL_RM32_imm8(const X86::Instruction& insn)
{
auto data = insn.modrm().read32(*this, insn);
insn.modrm().write32(*this, insn, op_shl(*this, data, insn.imm8()));
}
void SoftCPU::SHL_RM8_1(const X86::Instruction& insn)
{
auto data = insn.modrm().read8(*this, insn);
insn.modrm().write8(*this, insn, op_shl(*this, data, 1));
}
void SoftCPU::SHL_RM8_CL(const X86::Instruction& insn)
{
auto data = insn.modrm().read8(*this, insn);
insn.modrm().write8(*this, insn, op_shl(*this, data, cl()));
}
void SoftCPU::SHL_RM8_imm8(const X86::Instruction& insn)
{
auto data = insn.modrm().read8(*this, insn);
insn.modrm().write8(*this, insn, op_shl(*this, data, insn.imm8()));
}
void SoftCPU::SHRD_RM16_reg16_CL(const X86::Instruction&) { TODO(); }
void SoftCPU::SHRD_RM16_reg16_imm8(const X86::Instruction&) { TODO(); }
void SoftCPU::SHRD_RM32_reg32_CL(const X86::Instruction&) { TODO(); }