Syntax. The format for the DIV/IDIV instruction − DIV/IDIV divisor The dividend is in an accumulator. EDX:EAX r/m32 -> EAX . The quotient result of the division is stored into EAX; The remainder is placed in EDX.
The 8086 microprocessor supports 8 types of instructions − Data Transfer Instructions; Arithmetic Instructions; Bit Manipulation Instructions; String Instructions; Program Execution Transfer Instructions (Branch & Loop Instructions) Processor Control Instructions; Iteration Control Instructions; Interrupt Instructions Clipping is a handy way to collect important slides you want to go back to later. at Use of the REX.W prefix promotes operation to 64 bits. The quotient result of the division is stored into EAX; The remainder is placed in EDX. They are part of the 8086/8088 and higher processors. When doing 8-bit division, you must … See our Don’t stop learning now. It includes the following instructions −Instructions to transfer the instruction during an execution without any condition −Instructions to transfer the instruction during an execution with some conditions −These instructions are used to control the processor action by setting/resetting the flag values.These instructions are used to execute the given instructions for number of times. Following are the list of instructions under this group −These instructions are used to perform arithmetic operations like addition, subtraction, multiplication, division, etc.Following is the list of instructions under this group −These instructions are used to perform operations where data bits are involved, i.e. Microprocessor 8086 instruction description The DIV (Divide) instruction is used for unsigned data and the IDIV (Integer Divide) is used for signed data. If an attempt is made to divide by 0 or the quotient is too large to fit in AL (greater than FFH), the Arithmetic Instructions in 8086 will automatically execute a type 0 interrupt.
Use of the REX.R prefix permits access to additional registers (R8-R15). After … The action of this instruction depends on the operand size (dividend/divisor).Non-integral results are truncated (chopped) towards 0. Unlike in 8085 microprocessor, in 8086 microprocessor the destination operand need not be the accumulator.
Virtual-8086 Mode Exceptions; #DE: If the source operand (divisor) is 0. Unlike in 8085 microprocessor, in 8086 microprocessor the destination operand need not be the accumulator.Following is the table showing the list of arithmetic instructions:Here D stands for destination and S stands for source.Attention reader!
The DIV and IDIV instructions are not part of the 8085.
In 64-bit mode when REX.W is applied, the instruction divides the signed value in RDX:RAX by the source operand.
#GP(0) If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit. idiv executes signed division.idiv divides a 16-, 32-, or 64-bit register value (dividend) by a register or memory byte, word, or long (divisor).
This UNOFFICIAL, mechanically-separated, non-verified reference is provided for convenience, but it may be The IDIV Instruction The IDIV (signed divide) instruction performs signed integer division, using the same operands as the DIV instruction. In 64-bit mode, the instruction’s default operation size is 32 bits. IDIV is signed divide, sometimes called integer divide.
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