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Arithmetic instructions take two operands: a destination and a source. the NASM syntax, then the result is stored in the first argument, if you are using the GAS syntax, it is stored in the third argument. div arg. This divides the value in the dividend register(s) by arg , see table below.
You can't use al as divisor, because the command div assumes ax to be the dividend. This is an example for dividing bp by 7 mov ax,bp // ax is the dividend mov bl,7 // prepare divisor div bl // divide ax by bl. This is 8 bit division, so yes the remainder will be stored in ah . The result is in al . To clarify: If you
The DIV instuction divides the unsigned 8-bit integer in the accumulator by the unsigned 8-bit integer in register B. After the division, the quotient is stored in the accumulator and the remainder is stored in the B register. The carry and OV flags are cleared. If the B register begins with a value of 00h the division operation is
Multiplication and Division Instructions. CS 272. Sam Houston State University Dr. Tim McGuire. Multiplication instructions. imul source. Integer (signed) multiply. mul source. Unsigned multiply. Byte and Word Multiplication. If two bytes are multiplied, the result is a 16-bit word; If two words are multiplied, the result is a 32-bit
8 Mar 2014
Multiply and Divide Instructions. When the type suffix is not included in a multiply or divide instruction, it defaults to a long. Signed Multiply (imul). imulb r/m8 imulw r/m16 imul{l} r/m32 imul{wl} r/m[16|32], reg[16|32] imul{bwl} imm[16|32], r/m[16|32], reg[16|32]. Operation. r/m8 x AL -> AX r/m16 x AX -> DX:AX. r/m32 x EAX
Unsigned Divide (div). div{bwl} r/m[8|16|32]. Operation. AX r/m8 -> AL DX:AX. r/m16 -> AX EDX:EAX. r/m32 -> EAX. Description. div executes unsigned division. div divides a 16-, 32-, or 64-bit register value (dividend) by a register or memory byte, word, or long (divisor). The quotient is stored in the AL, AX, or EAX register
28 Nov 2015 Description. The div instruction is used to perform a division. Always divides the 64 bits value accross EDX:EAX by a value. The result of the division is stored in EAX and the remainder in EDX. Syntax. div value. Example. The operation. 0x8003 / 0x100. can be written as follows: Assembly, python. mov edx
Irvine, Kip R. Assembly Language for Intel-Based Computers, 2003. 1. Multiplication and Division Instructions. • MUL Instruction. • IMUL Instruction. • DIV Instruction. • Signed Integer Division. • Implementing Arithmetic Expressions
Assembly Arithmetic Instructions - Learn Assembly Programming in simple and easy steps starting from basic to advanced concepts with examples including Introduction, Environment Setup, Basic Syntax, Memory Segments, Status Register, System Calls, Addressing Modes, Variables, Constants, Arithmetic, Conditional
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