Bitwise Operations

Bitwise instructions operate on individual bits of register values.

AND

Instruction	Operand 1	Operand 2	Operation
`AND`	`Reg`	`Reg/Imm`	`OP1 &= OP2`

Instruction	Operand 1	Operand 2	Operation
`OR`	`Reg`	`Reg/Imm`	`OP1 \|= OP2`

Instruction	Operand 1	Operand 2	Operation
`XOR`	`Reg`	`Reg/Imm`	`OP1 ^= OP2`

Instruction	Operand 1	Operation
`NOT`	`Reg`	`OP1 = ~OP1`

Instruction	Operand 1	Operand 2	Operation
`SHL`	`Reg`	`Reg/Imm`	`OP1 <<= OP2`

Instruction	Operand 1	Operand 2	Operation
`SHR`	`Reg`	`Reg/Imm`	`OP1 >>= OP2`

Rotate left - bits shifted out from the left wrap around to the right.

Instruction	Operand 1	Operand 2	Operation
`ROL`	`Reg`	`Reg/Imm`	`OP1 = (OP1 << OP2) \| (OP1 >> (N-OP2))`

Rotate right - bits shifted out from the right wrap around to the left.

Instruction	Operand 1	Operand 2	Operation
`ROR`	`Reg`	`Reg/Imm`	`OP1 = (OP1 >> OP2) \| (OP1 << (N-OP2))`

Counts the number of set bits (1s) in a register and stores the result back.

Instruction	Operand 1	Operation
`POPCNT`	`Reg`	`OP1 = popcnt(OP1)`

Bit scan forward - returns the index of the lowest set bit plus one, or zero if the operand is zero.

Instruction	Operand 1	Operation
`BSF`	`Reg`	`OP1 = OP1 ? BitScanForward(OP1) + 1 : 0`

Bit scan reverse - returns the index of the highest set bit plus one, or zero if the operand is zero.

Instruction	Operand 1	Operation
`BSR`	`Reg`	`OP1 = OP1 ? BitScanReverse(OP1) + 1 : 0`