PUSH{cond} reglist

POP{cond} reglist

where:

PUSH is a synonym for STMDB sp!, reglist and POP is a synonym for LDMIA sp! reglist. PUSH and POP are the preferred mnemonics in these cases.

Registers are stored on the stack in numerical order, with the lowest numbered register at the lowest address.

This instruction causes a branch to the address popped off the stack into the PC. This is usually a return from a subroutine, where the LR was pushed onto the stack at the start of the subroutine.

In ARMv5T and above:

In ARMv4, bits[1:0] of the address loaded must be 0b00.

A subset of these instructions are available in the Thumb instruction set.

The following restrictions apply to the 16-bit instructions:

The following restrictions apply to the 32-bit instructions:

ARM PUSH instructions can have SP and PC in the reglist but these instructions that include SP or PC in the reglist are deprecated in ARMv6T2 and above.

ARM POP instructions cannot have SP but can have PC in the reglist. These instructions that include both PC and LR in the reglist are deprecated in ARMv6T2 and above.

    PUSH    {r0,r4-r7}
    PUSH    {r2,lr}
    POP     {r0,r10,pc} ; no 16-bit version available