5.7. Load and store multiple register instructions

The ARM and Thumb instruction sets include instructions that load and store multiple registers to and from memory.

Multiple register transfer instructions provide an efficient way of moving the contents of several registers to and from memory. They are most often used for block copy and for stack operations for context changing at subroutine entry and exit. The advantages of using a multiple register transfer instruction instead of a series of single data transfer instructions include:


The lowest numbered register is transferred to or from the lowest memory address accessed, and the highest numbered register to or from the highest address accessed. The order the of registers in the register list in the instructions makes no difference.

Use the -checkreglist assembler option to check that registers in register lists are specified in increasing order. See Command syntax in the ARM Software Development Toolkit Reference Guide.

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