Arm VERSION 1.2 Uživatelský manuál stáhnout pdf (Strana 53)

100

101

Writing ARM and Thumb Assembly Language

Usage

See Implementing stacks with LDM and STM on page 2-42 and Block copy with LDM

and STM on page 2-44.

2.8.2 LDM and STM addressing modes

There are four different addressing modes. The base register can be incremented or

decremented by one word for each register in the operation, and the increment or

decrement can occur before or after the operation. The suffixes for these options are:

Increment after.

Increment before.

Decrement after.

Decrement before.

There are alternative addressing mode suffixes that are easier to use for stack operations.

See Implementing stacks with LDM and STM on page 2-42.

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