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MOV register Immediate operand Memory operand LEA Byte word dword qword Zero extension MOVZX Sign extension MOVSX XCHG PUSH POP
Arithmetic
ADD SUB INC DEC IMUL MUL IDIV DIV NEG ADC
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Floating & SIMD
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x86-64 Assembly / Arithmetic

IDIV

Learn IDIV in x86-64 Assembly through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.

10 min read • Beginner

IDIV is an atomic x86-64 Assembly topic inside Arithmetic. This lesson focuses on how the IDIV construct is written, what it changes, and when it is the right tool.

Trace the example line by line. Identify the exact syntax for IDIV, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.

Topic-specific example

assembly-02-07-idiv.asm
assembly Try It Live 
mov rax, -25
cqo
mov rbx, 4
idiv rbx
Edge case / engineering note

For IDIV, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

IDIV Mastery Check →
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DIV