cmp instruction in 8086 microprocessor

Does a CMP instruction affect a source and a destination?
The destination can be a register or a memory location but the source and the destination cannot both be memory locations. This instruction will not affect the source and destination, only the flags are set to indicate the results of the comparison. AF, OF, SF, ZF, PF, and CF are updated by the CMP instruction.
How to check if a register is zero in CMP?
read cmp documentation first: The comparison is performed by subtracting the second operand from the first operand and then setting the status flags in the same manner as the SUB instruction.. But that's not a good way to check whether a register is zero or not Furthermore, with the CMP instruction, the destination operand doesn't change.
Which instruction is used in 8085 microprocessor?
COMPARE is an important instruction widely used in 8085 microprocessor. The 8085 instruction set has two types of Compare operations: Compare with accumulator (CMP) and Compare immediate with accumulator (CPI).
What is CMP in Java?
CMP is a logical instruction which compares the desticaion and the source. It compares a byte or word in the specified source with a byte or word in the destination. The destination can be a register or a memory location but the source and the destination cannot both be memory locations.

and Instruction

The AND instruction perform logical AND operation between two operands. The source can be an immediate, register, or a memory location and the destination can be either a register or a memory location. Both source and destination operands cannot be a memory location. It ANDs each bit of source operand with the destination operand and stores the res

8086 Or Logical Instruction

It performs the OR operation between two operands and stores the result back into the destination operand. The destination operand can be a register or a memory location whereas the source can be immediate, register, or a memory location. But Keep in mind, both operands should not be a memory location. The OR instruction clears the CF and OF flags

XOR Instruction 8086

This instruction performs the XOR operation between bits of source and destination operands. The XOR operation gives 1 when both inputs are different. When both inputs are same then the output will be zero. The source operand can be either a register or memory address whereas destination operand can be immediate, register or memory location. microcontrollerslab.com

Neg 2’s Complement Instruction

The NEG instruction compute the 2’s complement of the destination operand. The destination can be a register or memory address. It can change AF, PF, ZF and OF flags of flag register. microcontrollerslab.com

CMP Compare Instruction 8086

The compare instruction (CMP) compares the data of the two operands and depending upon the result sets the flag.The destination operand remains unchanged. It compares the two operands by computing the difference of two operands and sets CF, ZF and SF flags. The source and destination can be a register, immediate number, or a memory address. But, bo

Shift Right Instruction

There are two shift right instructions namely logical shift right (SHR) and Arithmetic shift right (SAR). Both instructions are explained below. SHR is a logical shift right instruction used for unsigned operands. It shifts the bits of operand one by one to the right. In every shift, the least significant bit goes to the carry flag and insert zeros

8086 Arithemtic Right Shift Instruction

This instruction is arithmetic right shift which deals with signed operands. The operation of this instruction is similar to the SHR instruction. The only difference is when the bits are shifted to the right, the empty bits at MSB are filled with sign bit instead of zeros. This instruction can also be used for division of signed number by 2 if the

Shift Left Instruction

There are two shift left instructions. One is used for signed operands and the other one is used for unsigned operands. Both instructions are explained in this section. The SHL is the logical left shift for unsigned operands. It shifts the operand bits to the left. The destination can be a register or a memory location. The number of shifts are sto

Sal Instruction 8086

The SAL has similar operation to the SHL instruction. The most significant bit of operand remains unchanged as it is a signed bit while remaining bits are shifted to the left and the empty bits at LSB are filled with zeros. microcontrollerslab.com

CMP instruction of 8086 microprocessor compare instruction

CMP INSTRUCTION IN EMU 8086 Compare Instruction in 8086 micoroprocessor CMP IN ASSEMBLY 8086

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