X86 INSTRUCTIONS::: LOGICAL INSTRUCTIONS

The instructions are of bit-wise logical instructions. Bit-wise AND Syntax : and src, dest #GAS Syntax and dest, src #Intel syntax Performs a bit-wise AND of the two operands, and stores the result in dest. Example : movl $0x1, %edx movl $0x0, %ecx andl %edx, %ecx ; here ecx would be 0 because 1 AND 0 = 0 Bit-wise OR Syntax : or src, dest #GAS Syntax or dest, src #Intel syntax Performs a bit-wise OR of the two operands, and stores the result in dest. Example : movl $0x1, %edx movl $0x0, %ecx orl %edx, %ecx ; here ecx would be 1 because 1 OR 0 = 1 Bit-wise XOR Syntax : xor src, dest #GAS Syntax xor dest, src #Intel syntax Performs a bit-wise XOR of the two operands, and stores the result in dest. Example : movl $0x1, %edx movl $0x0, %ecx xorl %edx, %ecx ; here ecx would be 1 because 1 XOR 0 = 1 Bit-wise Inversion Syntax : not arg Performs a bit-wise inversion of arg. Example : movl $0x1, %edx notl %edx /*here edx would be 0xFFFFFFFE because a bitwise NOT 0x00000001 = 0xFFFFFFFE*/