string manipulation instructions in 8086 with examples ppt

This is normally used to compare the operands bit by bit. Hence TEST instruction only affects the flag register (OF, CF, SF, ZF, PF) and AF undefined which indicates the result of the operation without changing any operand. The TEST instruction performs bit by bit logical AND operation on the source and destination operand but does not load the destination operand with result i.e., this instruction performs bit by bit AND and sets the corresponding Flag. NOT operand Example for NOT Instruction : Instruction The logical AND operation gives output as TRUE (logic 1) only when both the inputs are TRUE i.e., logic 1, otherwise, the output will be FALSE (logic 0) as shown in the below truth table. In 8086 microprocessor instruction set, the bit manipulation instructions are divided into three groups. The AND instruction performs bit by bit logical AND operation between source operand and destination operand, and stores the result in the destination operand. These instructions are also known as Bit Manipulation Instructions.

In this article let us learn about the logical instructions of the 8086 microprocessor. While the shift instructions group includes SHR, SHL, SAR, and SAL instructions, and rotate instructions include ROL, ROR, RCR, and RCL instructions. The logical group includes AND, OR, XOR, NOT, and TEST instructions. Examples price 45 substr (price, 0, 0) Inserts a dollar sign in position 0 of price variable, which now stores 45 location Chicago IL substr (location, 7, 0), Inserts a comma in position 7 of location variable, which now stores Chicago, IL.

3 String instructions The 8086 microprocessor is equipped with special instructions to handle. These instructions are also known as Bit Manipulation Instructions. Insert insertionstring within string, beginning at position start in string. 1 BYTE AND STRING MANIPULATON 2 Contents String instructions. Logical instructions are one among the instruction set of 8086 microprocessor.

String manipulation instructions in 8086 with examples ppt