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Assembly Arithmetic Instructions - Learning assembly programming language in simple and easy steps using this beginner's tutorial containing basic to advanced knowledge starting from Environment Setup, Status Register, Arithmetic Instructions, Conditional Execution, Loop Instructions, Logical Instructions, String
MUL Instruction (unsigned multiplication). MUL multiplies an 8, 16, or 32-bit unsigned operand by AL, AX, or EAX. Syntax: MUL multiplier ; the multiplier is 8, 16, or 32-bit register or . This generates the divide overflow processor exception, INT 0. Divide overflow is likely to occur when the dividend is much larger than the
F7 /7, IDIV r/m32, Signed divide EDX:EAX by r/m32, with result stored in EAX = Quotient, EDX = Remainder. if(Source == 0) Exception(DE); //divide error if(OperandSize == 8) { //word/byte operation Temporary = AX / Source; //signed division if(Temporary > 0x7F || Temporary < 0x80) Virtual-8086 Mode Exceptions
DAA DAS DEC DIV HLT IDIV IMUL IN INC INT INTO IRET JA, JAE JB JBE JC JCXZ JE JG JGE JL JLE JMP JNA JNAE JNB, JNBE JNC JNE JNG JNGE JNL JNLE JNO JNP JNS JNZ JO JP JPE, JPO JS JZ LAHF LDS LEA LES LODSB LODSW LOOP LOOPE LOOPNE LOOPNZ LOOPZ, MOV MOVSB MOVSW MUL NEG NOP
However, these AMD processors also support the following x86 instructions which are not 8086 compatible: bound, enter, ins, leave, outs, popa, and pusha. Important Usage Notes: The first operand of an instruction is also the destination if there is a resulting value. Divide and multiply instructions are common exceptions to
The DIV (unsigned divide) instruction performs 8-bit,. 16-bit, and 32-bit division on unsigned integers. • A single operand is supplied (register or memory operand), which is assumed to be the divisor. • Instruction formats: DIV r/m8. DIV r/m16. DIV r/m32. Default Operands:
HALT Instruction -. The HLT instruction will cause the. 8086 to stop fetching and executing instructions. The 8086 will enter a halt state. The only way to get the processor out of the halt state are with an interrupt signal on the INTR pin or an interrupt signal on NMI pin or a reset signal on the RESET input . ? IDIV Instruction -.
The MOV instruction is the most important command in the 8086 because it moves data from one location to another. It also has the widest variety .. If the divisor has a value of zero, the CPU generates a "Divide by zero" interrupt which, in most cases, will cause the computer to halt the executing program (at the very least).
o This MUL instruction used to multiply the unsigned number. o The Multiplication is manually can be done by repeated addition. Syntax . www.arl.wustl.edu/%7Elockwood/class/cs306/ books/artofasm/toc.html ‡ Intel 8086 Microprocessor Datasheet ‡ Richard C.Detmer, ?Essentials of 80x86 Assembly Language?.
3 Feb 2015 Multiplication & division instructions microprocessor 8086. 17. CONT.. Syntax: DIV divisor IDIV divisor Byte Form: The divisor is eight bit register or memory byte The 16 – bit dividend is assumed to be in AX.
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