Bit Test (bt)

bt{wl}		imm8, r/m[16|32]
bt{wl}		reg[16|32], r/m[16|32]

Operation

BIT [LeftSRC, RightSRC] -> CF

Description

The bit indicated by the first operand (base) and the second operand (offset) are saved by bt into CF (carry flag).

Example

btl $253, 4(%edi)
btl %edx, 4(%edi)