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14. The SHL Instruction, Shift Logical Bit Left

  • SHL is one of the Bit Manipulation Instructions: 

            mov al, 75h
        mov cl, 3
        shl al, cl

  • The instruction format is

    • SHL destination, count

    where  1 <= count <= 31.

  • All bits in the destination operand are shifted left count times.

  • The less-significant bit (LSB) is filled with 0 each time.

  • The most-significant bit (MSB) is placed into carry flag CF.

  • Other flags are modified according to the final result.

  • Execution of  SHL AL, CL :

      Execution of SHL AL, CL

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