Difference between lea and mov instructions in 8086. what's the differ between lea and mov offset ?

Thus, the difference is that the first is direct, the second indirect. The INC instruction increments the specified operand by 1. Sir Random Sir Random 3 3 silver badges 6 6 bronze badges. Active Oldest Votes. Hence, there is no confusion on my part.

 

What is the purpose of LEA instruction in 8086? forum? The MOV instruction is a 'MOVe' effectively a copy of the address that the TABLE-ADDR label stands for. The LEA instruction is a 'Load Effective.For instance, cc with -O2 optimization translates.

 

filmha2.online › What-is-the-difference-between-LEA-and-MOV-instruct.The mnemonic lea stands for load effective address.

 

The simplest way to think of it is that MOV deals with data, whereas LEA deals with addresses. Both instructions are similar in that they take a source and.First of all, I wouldn't have found an answer to this question by looking into that link.

 

filmha2.online › questions › what-is-the-difference.Linked 2.

 

The difference is that lea only calculates the address while mov actually moves the data. If you.I upvoted Nick's dup ages ago but vtc'd just now.

 

I want to know what's the difference between using: 1- lea dx,string 2- mov dx,offset string. I'm confused! as I think both of them gets 'string' address.Ostap Ostap 39 3 3 bronze badges.

 

Instructions to transfer the address · LEA − Used to load the address of operand into the provided register. · LDS − Used to load DS register and other provided.Load Effective Address calculates its src operand in the same way as the mov instruction does, but rather than loading the contents of that address into the dest operand, it loads the address itself.

 

In short, LEA loads.Lets understand this with a example.Forum Difference between lea and mov instructions in 8086

 

? MOV will grab the data at the address inside the brackets.Load Effective Address calculates its src operand in the same way as the mov instruction does, but rather than loading the contents of that address into the dest operand, it loads the address itself.

 

For indirect addressing, the can only use the BX, BP, SI and DI registers. example: mov ax,[bx] Note that the difference between this and Register.This is despite the use of parentheses that occurs in both.

 

MOV AX, 02FFh ; AH = 02, AL = 0FFh Compare. Algorithm: operand1 - operand2. Page 7 of instructions LEA AX, m ; AX = offset of m.Next Article How do I download a custom pointer?

 

Intel Assembly Instructions Operands can be specified in a variety of ways that are called MOV. AL, CX????? ☹. Example uses register mode.Sign up or log in Sign up using Google.Forum Difference between lea and mov instructions in 8086

 

Compilers really do a great job at making the exe efficient.

 

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In the case of the mov instruction, the result is to access this location in memory and reference the.

 

It was added to because hardware is there to decode and calculate adressing modes.

 

LEA will perform the calculation of the address inside the brackets and place that calculated address into the destination operand.

 

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Ostap Ostap 39 3 3 bronze badges.

 

In the case of the mov instruction, the result is to access this location in memory and reference the.

 

Its useful if you have a multi-part calculation with multiple base addresses etc.

 

On reflection, I was too hasty and now with naveen that a the other question does not answer "what's the difference" and b this is a useful question.

 

Thus, either you write mov rax, [rbph] to transfer Bit values, or mov eax, dword ptr [rbph].Forum Difference between lea and mov instructions in 8086

 

Compilers really do a great job at making the exe efficient.

 

The purpose of LEA is to allow one to perform a non-trivial address calculation and store the result [for later usage].

 

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No load from memory is involved, just arithmetic operations [2].

 

The offset is evaluated statically by the assembler when you use the MOV alternative, hence the offset must be available for computation at assembly time.

 

This is true, but there's a subtlety that should be addressed.

 

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In the CLR's CIL which is a higher level stack based abstract machine, the term load refers to putting a value onto the notional stack and is normally l

 

Thank you for your patience as I am diving into 64b assembler.