From 6e3a3f8323266871ed6e3fbfd161e0b766516cc2 Mon Sep 17 00:00:00 2001 From: iximeow Date: Mon, 3 Aug 2020 03:45:31 -0700 Subject: centralize mem_oper assignment where possible --- src/long_mode/mod.rs | 41 ++++++++++------------------------------- 1 file changed, 10 insertions(+), 31 deletions(-) (limited to 'src/long_mode/mod.rs') diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs index 8148ef9..6b0d51c 100644 --- a/src/long_mode/mod.rs +++ b/src/long_mode/mod.rs @@ -5730,17 +5730,15 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, read_modrm_reg(instruction, modrm, bank)? } else { read_M(&mut bytes_iter, instruction, modrm, length)? - } + }; + instruction.operands[1] = mem_oper; } if operand_code.is_only_modrm_operands() { - let (mmm, rrr) = if operand_code.has_reg_mem() { - (1, 0) - } else { - (0, 1) + if !operand_code.has_reg_mem() { + instruction.operands[0] = mem_oper; + instruction.operands[1] = OperandSpec::RegRRR; }; - instruction.operands[mmm] = mem_oper; - instruction.operands[rrr] = OperandSpec::RegRRR; } else if operand_code.bits() == OperandCode::Ibs as u16 { instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; @@ -6056,7 +6054,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, } }, OperandCode::G_E_mm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::MM; instruction.modrm_rrr.num &= 0b111; if mem_oper == OperandSpec::RegMMM { @@ -6066,7 +6063,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operand_count = 2; }, OperandCode::G_U_mm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::D; if mem_oper != OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); @@ -6076,7 +6072,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operand_count = 2; }, OperandCode::G_U_xmm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::X; if mem_oper != OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); @@ -6087,7 +6082,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, op @ OperandCode::G_M_xmm | op @ OperandCode::G_E_xmm => { instruction.modrm_rrr.bank = RegisterBank::X; - instruction.operands[1] = mem_oper; instruction.operand_count = 2; if instruction.operands[1] == OperandSpec::RegMMM { if op == OperandCode::G_M_xmm { @@ -6112,7 +6106,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operand_count = 3; }, OperandCode::G_E_mm_Ib => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr = RegSpec { bank: RegisterBank::MM, num: (modrm >> 3) & 7 }; instruction.imm = read_num(&mut bytes_iter, 1)? as u8 as u64; @@ -6189,7 +6182,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operands[0] = OperandSpec::ImmI32; } OperandCode::Gb_Eb_Ib => { - instruction.operands[1] = mem_oper; instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; instruction.operands[2] = OperandSpec::ImmI8; @@ -6198,7 +6190,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, OperandCode::Gv_Ev_Iv => { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); let numwidth = if opwidth == 8 { 4 } else { opwidth }; - instruction.operands[1] = mem_oper; instruction.imm = read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; instruction.operands[2] = match opwidth { @@ -6229,6 +6220,11 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operands[0] = OperandSpec::ImmU8; instruction.operand_count = 1; } + OperandCode::Nothing => { + instruction.operands[0] = OperandSpec::Nothing; + instruction.operand_count = 0; + return Ok(()); + }, _ => { unlikely_operands(decoder, bytes_iter, instruction, operand_code, mem_oper, length)?; } @@ -6239,11 +6235,6 @@ fn read_operands>(decoder: &InstDecoder, mut bytes_iter: T, } fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter: T, instruction: &mut Instruction, operand_code: OperandCode, mem_oper: OperandSpec, length: &mut u8) -> Result<(), DecodeError> { match operand_code { - OperandCode::Nothing => { - instruction.operands[0] = OperandSpec::Nothing; - instruction.operand_count = 0; - return Ok(()); - }, OperandCode::I_1 => { instruction.imm = 1; instruction.operands[0] = OperandSpec::ImmU8; @@ -6285,7 +6276,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } OperandCode::G_mm_U_mm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::MM; if mem_oper != OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); @@ -7124,7 +7114,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } }, OperandCode::G_mm_Edq => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::MM; instruction.modrm_rrr.num &= 0b111; if mem_oper == OperandSpec::RegMMM { @@ -7136,7 +7125,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::G_mm_E => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::MM; instruction.modrm_rrr.num &= 0b111; if mem_oper == OperandSpec::RegMMM { @@ -7191,7 +7179,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter }, */ OperandCode::G_xmm_Edq => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::X; if mem_oper == OperandSpec::RegMMM { if instruction.prefixes.rex().w() { @@ -7202,7 +7189,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } }, OperandCode::G_xmm_Ed_Ib => { - instruction.operands[1] = mem_oper; instruction.operands[2] = OperandSpec::ImmU8; instruction.operand_count = 3; instruction.imm = @@ -7214,14 +7200,12 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } }, OperandCode::G_xmm_Eq => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::X; if mem_oper == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::Q; } }, OperandCode::G_mm_E_xmm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::MM; instruction.modrm_rrr.num &= 0b111; if mem_oper == OperandSpec::RegMMM { @@ -7230,7 +7214,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter }, op @ OperandCode::G_xmm_U_mm | op @ OperandCode::G_xmm_E_mm => { - instruction.operands[1] = mem_oper; instruction.modrm_rrr.bank = RegisterBank::X; if mem_oper == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::MM; @@ -7242,7 +7225,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } }, OperandCode::Rv_Gmm_Ib => { - instruction.operands[1] = mem_oper; instruction.operands[2] = OperandSpec::ImmU8; instruction.operand_count = 3; instruction.imm = @@ -7257,7 +7239,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::U_mm_G_xmm => { - instruction.operands[1] = mem_oper; instruction.modrm_mmm.bank = RegisterBank::X; if mem_oper == OperandSpec::RegMMM { instruction.modrm_rrr.bank = RegisterBank::MM; @@ -7351,7 +7332,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter }; } OperandCode::Gd_U_xmm => { - instruction.operands[1] = mem_oper; if instruction.operands[1] != OperandSpec::RegMMM { instruction.opcode = Opcode::Invalid; return Err(DecodeError::InvalidOperand); @@ -7360,7 +7340,6 @@ fn unlikely_operands>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm.bank = RegisterBank::X; } OperandCode::Gv_E_xmm => { - instruction.operands[1] = mem_oper; if instruction.operands[1] == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::X; } -- cgit v1.1