Arm VERSION 1.2 Bedienungsanleitung PDF herunterladen (Seite 212)

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Thumb Instruction Reference

5.2.2 ADD, high or low registers

Add values in registers, returning the result to the first operand register.

Syntax

ADD Rd, Rm

where:

is the destination register. It is also used for the first operand.

is a register containing the second operand.

Usage

This instruction adds the values in

and

, and places the result in

Note

ADD Rd,Rm

instruction where both

and

are low registers assembles to an

ADD

Rd,Rd,Rm

instruction (see ADD and SUB, low registers on page 5-16).

Be aware of this when looking at disassembly listings.

Condition flags

The N, Z, C, and V condition flags are:

• updated if both

and

are low registers

• unaffected otherwise.

Architectures

This instruction is available in all T variants of the ARM architecture.

Examples

ADD r12,r4

ADD r10,r11

ADD r0,r8

ADD r2,r4 ; equivalent to ADD r2,r2,r4. Does affect flags.

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