Arm VERSION 1.2 Manual de usuario descargar pdf (Pagina 142)

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101

ARM Instruction Reference

4.3.4 MOV and MVN

Move and Move Not.

Syntax

MOV{cond}{S} Rd, Operand2

MVN{cond}{S} Rd, Operand2

where:

cond

is an optional condition code (see Conditional execution on page 4-4).

is an optional suffix. If

is specified, the condition code flags are updated

on the result of the operation (see Conditional execution on page 4-4).

is the ARM register for the result.

Operand2

is a flexible second operand. See Flexible second operand on page 4-24

for details of the options.

Usage

The

MOV

instruction copies the value of

Operand2

into

The

MVN

instruction takes the value of

Operand2

, performs a bitwise logical NOT

operation on the value, and places the result into

In certain circumstances, the assembler can substitute

MVN

for

MOV

, or

MOV

for

MVN

. Be

aware of this when reading disassembly listings. See Instruction substitution on

page 4-26 for details.

Condition flags

is specified, these instructions:

• update the N and Z flags according to the result

• can update the C flag during the calculation of

Operand2

(see Flexible second

operand on page 4-24)

• do not affect the V flag.

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