- It complements each bit of Src to produce 1’s complement of the specified operand.
- The operand can be a register or memory location.
AND Des, Src:
- It performs AND operation of Des and Src.
- Src can be immediate number, register or memory location.
- Des can be register or memory location.
- Both operands cannot be memory locations at the same time.
- CF and OF become zero after the operation.
- PF, SF and ZF are updated.
OR Des, Src:
- It performs OR operation of Des and Src.
- Src can be immediate number, register or memory location.
- Des can be register or memory location.
- Both operands cannot be memory locations at the same time.
- CF and OF become zero after the operation.
- PF, SF and ZF are updated.
XOR Des, Src:
- It performs XOR operation of Des and Src.
- Src can be immediate number, register or memory location.
- Des can be register or memory location.
- Both operands cannot be memory locations at the same time.
- CF and OF become zero after the operation.
- PF, SF and ZF are updated.
SHL Des, Count:
- It shift bits of byte or word left, by count.
- It puts zero(s) in LSBs.
- MSB is shifted into carry flag.
- If the number of bits desired to be shifted is 1, then the immediate number 1 can be written in Count.
- However, if the number of bits to be shifted is more than 1, then the count is put in CL register.
SHR Des, Count:
- It shift bits of byte or word right, by count.
- It puts zero(s) in MSBs.
- LSB is shifted into carry flag.
- If the number of bits desired to be shifted is 1, then the immediate number 1 can be written in Count.
- However, if the number of bits to be shifted is more than 1, then the count is put in CL register.
ROL Des, Count:
- It rotates bits of byte or word left, by count.
- MSB is transferred to LSB and also to CF.
- If the number of bits desired to be shifted is 1, then the immediate number 1 can be written in Count.
- However, if the number of bits to be shifted is more than 1, then the count is put in CL register.
ROR Des, Count:
- It rotates bits of byte or word right, by count.
- LSB is transferred to MSB and also to CF.
- If the number of bits desired to be shifted is 1, then the immediate number 1 can be written in Count.
- However, if the number of bits to be shifted is more than 1, then the count is put in CL register.