The SUB instruction subtracts the value of Operand2 or imm12 from the value in Rn . In certain circumstances, the assembler can substitute one instruction for another..
Beside this, what is sub instruction?
SUB Instruction. The SUB instruction performs a subtraction on the first source register's contents by the second source. register's contents, and stores the result in the destination register. It's syntax is: SUB $destination register's address, $first source register's address, $second source register's address.
Likewise, what is sub in microprocessor? In 8085 Instruction, SUB is a mnemonic that stands for 'SUBtract contents of R from Accumulator. Here R stands for any of the following registers, or memory location M pointed by HL pair.
In this manner, how does add work in assembly?
The add instruction adds together its two operands, storing the result in its first operand. Note, whereas both operands may be registers, at most one operand may be a memory location. The inc instruction increments the contents of its operand by one. The dec instruction decrements the contents of its operand by one.
What is MOV in assembly language?
mov is an X86 assembly language instruction, it is meant to move data between registers and memory.
Related Question Answers
What does JMP do in assembly?
JMP (x86 instruction) In the x86 assembly language, the JMP instruction performs an unconditional jump. Such an instruction transfers the flow of execution by changing the instruction pointer register.What is Callq?
callq refers to a relocatable call in shared libraries/dynamic libraries. The idea is push 0, then push the symbol of to search then call a function so search for it on the first call. In the relocatable table of the program, it replaces the call to the actual location of the function on the first call of the function.What is Imul Assembly?
Description. The single-operand form of imul executes a signed multiply of a byte, word, or long by the contents of the AL, AX, or EAX register and stores the product in the AX, DX:AX or EDX:EAX register respectively.What does Lea do in assembly?
The lea (load effective address) instruction is used to put a memory address into the destination.What is CMP in assembly language?
The CMP instruction compares two operands. It is generally used in conditional execution. This instruction basically subtracts one operand from the other for comparing whether the operands are equal or not. It is used along with the conditional jump instruction for decision making.What does opcode mean?
Opcode is the portion of a machine language instruction that specifies what operation is to be performed by the central processing unit (CPU). The term is an abbreviation of operation code.What is EDI in assembly?
edi. edi is a non-volatile general-purpose register that is often used as a pointer. It is similar to esi, except that it is generally used as a destination for data.What does EAX stand for?
It stands for a general purpose register. The 16 bit AX register can be addressed as AH (high byte) and AL (low byte). The EAX register is the 32 bit version of the AX register. The E stands for extended. what-does-x-mean-in-eax-ebx-ecx-in-assembly/2545226#2545226.What is call in assembly?
The call instruction is used to call a function. The CALL instruction performs two operations: It pushes the return address (address immediately after the CALL instruction) on the stack. It changes EIP to the call destination.What happens when RET instruction is executed?
The RET instruction pops the return address off the stack (which is pointed to by the stack pointer register) and then continues execution at that address. The RET instruction pops the return address off the stack (which is pointed to by the stack pointer register) and then continues execution at that address.What is RBP Assembly?
The first lines of the function main refers to rbp and rsp ; these are special purpose registers. rbp is the base pointer, which points to the base of the current stack frame, and rsp is the stack pointer, which points to the top of the current stack frame.What is DIV instruction?
The DIV (unsigned divide) instruction performs 8-bit, 16-bit, and 32-bit division on unsigned integers. The instruction formats are: DIV reg8/mem8 DIV reg16/mem16 DIV reg32/mem32. The single operand is the divisor: dividend / divisor = quotient ( + remainder ) Quotient is the result of a division.What is the difference between macro and procedure?
Macro is a sequence of instructions that are written within the macro definition to support modular programming. On the other hand, a procedure is a set of instructions that performs a specific task, and a programmer can call it repetitively. Thus, this is the fundamental difference between macro and procedure.How does the stack pointer work?
The stack pointer stores the address of the most recent entry that was pushed onto the stack. To push a value onto the stack, the stack pointer is incremented to point to the next physical memory address, and the new value is copied to that address in memory. 
