DIVS

Operation

Divides the signed destination by source with truncation toward zero and writes the quotient.

Assembler Syntax

DIVS.{B|W|L|Q}(z) <ea>(e), Rn(d)

DIVS.{B|W|L|Q}(z) Rn(s), Rn(d)

Privilege

Unprivileged

Repeat eligibility

REP eligible; REPcc observes dst

Interprets both selected-width operands as signed integers, divides the destination by the source with truncation toward zero, and writes the quotient. A sub-Q quotient is sign-extended to 64 bits. Division by zero raises DIVIDE_BY_ZERO; the most-negative value divided by minus one raises SIGNED_DIVIDE_OVERFLOW.

Let \(n\) be the selected operand width, \(d\) the signed two's-complement dividend, and \(s\) the signed two's-complement divisor. The quotient and remainder are defined by $\(q = \operatorname{trunc}(d/s), \qquad r = d - qs .\)$ Thus a nonzero remainder has the sign of the dividend. The destination supplies the dividend and receives \(q\).

A zero divisor raises DIVIDE_BY_ZERO; the most-negative value divided by \(-1\) raises SIGNED_DIVIDE_OVERFLOW. No destination is changed.

2.75in

Encodings

DIVS.{B|W|L|Q}(z) <ea>(e), Rn(d)

Format: Instruction format for DIVS.{B|W|L|Q}(z) <ea>(e), Rn(d)

2.75in DIVS.{B|W|L|Q}(z) Rn(s), Rn(d)

Format: Instruction format for DIVS.{B|W|L|Q}(z) Rn(s), Rn(d)