on operand (first operand). The result of the subtraction is stored in the destination operand. The destination operand can be a register or a memory location; the source operand can be an immediate, a register, or a memory location. (However, two memory operands cannot be used in one instruction.) The state of the CF flag represents a borrow from a previous subtraction.</p>
<p>When an immediate value is used as an operand, it is sign-extended to the length of the destination operand format.</p>
<p>The SBB 