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Std::Bits::Add_int Std::Bits::Sign_Extend Mem_Fetch Report_Invalid_Opcode Instr_CMP AL Next_IP let operand_size := 8; let src1 := AL; let src2 := Sign_Extend(Mem_Fetch?(ip, 8), operand_size); LockPrefix #UD Next_IP := ip + 1; Instr_CMP(operand_size, src1, src2); AL imm8 src1 AL src2 imm8 let (result, carry_out, overflow, alternative_carry) := Subtract(src1, src2); RFLAGS.OF := overflow; RFLAGS.SF := result[operand_size-1]; RFLAGS.ZF := Bit(Is_Zero(result)); RFLAGS.AF := alternative_carry; RFLAGS.PF := Bit(Is_Parity_Even(result[0 +: 8])); RFLAGS.CF := carry_out; Std::Integer::Le Std::Integer::Lt Std::Integer::Subtract Std::Bits::Is_Zero Std::Bits::Is_Parity_Even Bit Subtract RFLAGS Std::Integer::Le Std::Integer::Min Std::Integer::Positive_Divide Std::Bits::Add_int Std::Bits::Sign_Extend Mem_Fetch Report_Invalid_Opcode Instr_CMP RAX Next_IP let src1 := RAX[0 +: operand_size]; let src2 := Sign_Extend(Mem_Fetch?(ip, Min(operand_size, 32)), operand_size); LockPrefix #UD Next_IP := ip + (Min(operand_size, 32) / 8); Instr_CMP(operand_size, src1, src2); AX/EAX/RAX immz src1 AX/EAX/RAX src2 immz Std::Boolean::Strict_Or Std::Integer::Add Std::Bits::Add_int Std::Bits::Append Std::Bits::Sign_Extend Mem_Fetch Read_GPR8 Report_Invalid_Opcode Instr_CMP Next_IP let operand_size := 8; let src1 := Read_GPR8(context.rex_b4 ++ context.rex_b3 ++ rm, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let src2 := Sign_Extend(Mem_Fetch?(ip, 8), operand_size); LockPrefix #UD Next_IP := ip + 1; Instr_CMP(operand_size, src1, src2); r8 imm8 src1 ModRM:r/m r8 src2 imm8 Std::Bits::Add_int Std::Bits::Sign_Extend Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Mem_Fetch Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let operand_size := 8; let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Sign_Extend(Mem_Fetch?(next_ip0, 8), operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0 + 1); LockPrefix #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0 + 1; Instr_CMP(operand_size, src1, src2); mv imm8 src1 ModRM:r/m mv src2 imm8 Std::Boolean::Not Std::Boolean::Strict_Or Std::Integer::Add Std::Integer::Ne Std::Bits::Add_int Std::Bits::Append Std::Bits::Sign_Extend Data_Size_Of_Current_Mode In_64Bit_Mode Mem_Fetch Read_GPR8 Report_Invalid_Opcode Instr_CMP Next_IP let operand_size := 8; let src1 := Read_GPR8(context.rex_b4 ++ context.rex_b3 ++ rm, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let src2 := Sign_Extend(Mem_Fetch?(ip, 8), operand_size); if not ((Data_Size_Of_Current_Mode() != 64)) then Report_Invalid_Opcode!(); endif; LockPrefix #UD Mode64 #UD Next_IP := ip + 1; Instr_CMP(operand_size, src1, src2); r8 imm8 src1 ModRM:r/m r8 src2 imm8 Std::Boolean::Not Std::Integer::Ne Std::Bits::Add_int Std::Bits::Sign_Extend Data_Size_Of_Current_Mode Effective_Address Handle_RIP_Relative_Address In_64Bit_Mode Logical_Mem_Read Mem_Fetch Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let operand_size := 8; let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Sign_Extend(Mem_Fetch?(next_ip0, 8), operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0 + 1); if not ((Data_Size_Of_Current_Mode() != 64)) then Report_Invalid_Opcode!(); endif; LockPrefix #UD Mode64 #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0 + 1; Instr_CMP(operand_size, src1, src2); mv imm8 src1 ModRM:r/m mv src2 imm8 Std::Integer::Add Std::Bits::Add_int Std::Bits::Append Std::Bits::Sign_Extend Mem_Fetch Read_GPR Report_Invalid_Opcode Instr_CMP Next_IP let src1 := Read_GPR(context.rex_b4 ++ context.rex_b3 ++ rm, operand_size); let src2 := Sign_Extend(Mem_Fetch?(ip, 8), operand_size); LockPrefix #UD Next_IP := ip + 1; Instr_CMP(operand_size, src1, src2); rv imm8 src1 ModRM:r/m rv src2 imm8 Std::Bits::Add_int Std::Bits::Sign_Extend Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Mem_Fetch Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Sign_Extend(Mem_Fetch?(next_ip0, 8), operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0 + 1); LockPrefix #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0 + 1; Instr_CMP(operand_size, src1, src2); mv imm8 src1 ModRM:r/m mv src2 imm8 Std::Integer::Add Std::Integer::Le Std::Integer::Min Std::Integer::Positive_Divide Std::Bits::Add_int Std::Bits::Append Std::Bits::Sign_Extend Mem_Fetch Read_GPR Report_Invalid_Opcode Instr_CMP Next_IP let src1 := Read_GPR(context.rex_b4 ++ context.rex_b3 ++ rm, operand_size); let src2 := Sign_Extend(Mem_Fetch?(ip, Min(operand_size, 32)), operand_size); LockPrefix #UD Next_IP := ip + (Min(operand_size, 32) / 8); Instr_CMP(operand_size, src1, src2); rv immz src1 ModRM:r/m rv src2 immz Std::Integer::Le Std::Integer::Min Std::Integer::Positive_Divide Std::Bits::Add_int Std::Bits::Sign_Extend Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Mem_Fetch Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Sign_Extend(Mem_Fetch?(next_ip0, Min(operand_size, 32)), operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0 + (Min(operand_size, 32) / 8)); LockPrefix #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0 + (Min(operand_size, 32) / 8); Instr_CMP(operand_size, src1, src2); mv immz src1 ModRM:r/m mv src2 immz Std::Integer::Add Std::Bits::Append Read_GPR Report_Invalid_Opcode Instr_CMP Next_IP let src1 := Read_GPR(context.rex_b4 ++ context.rex_b3 ++ rm, operand_size); let src2 := Read_GPR(context.rex_r4 ++ context.rex_r3 ++ reg, operand_size); LockPrefix #UD Next_IP := ip; Instr_CMP(operand_size, src1, src2); rv1 rv2 src1 ModRM:r/m rv1 src2 ModRM:reg rv2 Std::Integer::Add Std::Bits::Append Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Read_GPR Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Read_GPR(context.rex_r4 ++ context.rex_r3 ++ reg, operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0); LockPrefix #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0; Instr_CMP(operand_size, src1, src2); mv1 rv2 src1 ModRM:r/m mv1 src2 ModRM:reg rv2 Std::Integer::Add Std::Bits::Append Read_GPR Report_Invalid_Opcode Instr_CMP Next_IP let src1 := Read_GPR(context.rex_r4 ++ context.rex_r3 ++ reg, operand_size); let src2 := Read_GPR(context.rex_b4 ++ context.rex_b3 ++ rm, operand_size); LockPrefix #UD Next_IP := ip; Instr_CMP(operand_size, src1, src2); rv1 rv2 src1 ModRM:reg rv1 src2 ModRM:r/m rv2 Std::Integer::Add Std::Bits::Append Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Read_GPR Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src1 := Read_GPR(context.rex_r4 ++ context.rex_r3 ++ reg, operand_size); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0); LockPrefix #UD let src2 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0; Instr_CMP(operand_size, src1, src2); rv1 mv2 src1 ModRM:reg rv1 src2 ModRM:r/m mv2 Std::Boolean::Strict_Or Std::Integer::Add Std::Bits::Append Read_GPR8 Report_Invalid_Opcode Instr_CMP Next_IP let operand_size := 8; let src1 := Read_GPR8(context.rex_b4 ++ context.rex_b3 ++ rm, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let src2 := Read_GPR8(context.rex_r4 ++ context.rex_r3 ++ reg, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); LockPrefix #UD Next_IP := ip; Instr_CMP(operand_size, src1, src2); r81 r82 src1 ModRM:r/m r81 src2 ModRM:reg r82 Std::Boolean::Strict_Or Std::Integer::Add Std::Bits::Append Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Read_GPR8 Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let operand_size := 8; let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src2 := Read_GPR8(context.rex_r4 ++ context.rex_r3 ++ reg, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0); LockPrefix #UD let src1 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0; Instr_CMP(operand_size, src1, src2); mv1 r82 src1 ModRM:r/m mv1 src2 ModRM:reg r82 Std::Boolean::Strict_Or Std::Integer::Add Std::Bits::Append Read_GPR8 Report_Invalid_Opcode Instr_CMP Next_IP let operand_size := 8; let src1 := Read_GPR8(context.rex_r4 ++ context.rex_r3 ++ reg, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let src2 := Read_GPR8(context.rex_b4 ++ context.rex_b3 ++ rm, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); LockPrefix #UD Next_IP := ip; Instr_CMP(operand_size, src1, src2); r81 r82 src1 ModRM:reg r81 src2 ModRM:r/m r82 Std::Boolean::Strict_Or Std::Integer::Add Std::Bits::Append Effective_Address Handle_RIP_Relative_Address Logical_Mem_Read Read_GPR8 Report_Invalid_Opcode Instr_CMP False Memory_Read Normal_Alignment Next_IP let operand_size := 8; let disp8n := 1; let (ea_offset, segment, next_ip0, is_rip_relative) := Effective_Address?(address_size, context, mod, rm, disp8n, ip); let src1 := Read_GPR8(context.rex_r4 ++ context.rex_r3 ++ reg, (context.rex_prefix_present or context.rex2_prefix_present or context.vex_prefix_present or context.evex_prefix_present)); let effective_address := Handle_RIP_Relative_Address(address_size, is_rip_relative, ea_offset, next_ip0); LockPrefix #UD let src2 := Logical_Mem_Read?(segment, effective_address, operand_size); Next_IP := next_ip0; Instr_CMP(operand_size, src1, src2); r81 mv2 src1 ModRM:reg r81 src2 ModRM:r/m mv2 scalar integer/arithmetic/binary integer/comparison With a REX prefix in 64-bit mode, attempts to access AH, BH, CH, or DH will instead access SPL, DIL, BPL, or SIL, respectively. Operand is sign-extended to operand_size bits.