P60ARM-B/IG/GP1N Zarlink Semiconductor, Inc., P60ARM-B/IG/GP1N Datasheet - Page 51

Manufacturer Part Number

P60ARM-B/IG/GP1N

Description

A Low Power, General Purpose 32 Bit RISC Microprocessor

Manufacturer

Zarlink Semiconductor, Inc.

Datasheet

1.P60ARM-BIGGP1N.pdf (120 pages)

IA, IB, DA, DB allow control when LDM/STM are not being used for stacks and simply mean Increment

After, Increment Before, Decrement After, Decrement Before.

4.8.10 Examples

These instructions may be used to save state on subroutine entry, and restore it efficiently on return to the

calling routine:

LDMFD

STMIA

LDMFD

STMFD

STMED

LDMED

SP!,{R0,R1,R2}

R0,{R0-R15}

SP!,{R15}

SP!,{R15}^

R13,{R0-R14}^

SP!,{R0-R3,R14}

somewhere

SP!,{R0-R3,R15}

; unstack 3 registers

; save all registers

; R15 <- (SP),CPSR unchanged

; R15 <- (SP), CPSR <- SPSR_mode (allowed

;

; Save user mode regs on stack (allowed

;

; save R0 to R3 to use as workspace

;

; this nested call will overwrite R14

; restore workspace and return

only in privileged modes)

and R14 for returning

Instruction Set - LDM, STM