ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Deprecated and Obsolete Features
D.3 Obsolete features
The features described in the following sections were deprecated in ARMv6, and are no longer supported
in ARMv7.
D.3.1 Rotated aligned accesses
Unaligned accesses, where permitted, were treated as rotated aligned accesses before ARMv6. This
behavior was configurable, but deprecated, in ARMv6. It is obsolete in ARMv7. For more information, see
Alignment on page AppxG-6.
D.3.2 Ordering of instructions that change the CPSR interrupt masks
Any ARMv6 instruction that implicitly or explicitly changes the interrupt masks in the CPSR and appears
in program order after a Strongly-ordered access must wait for the Strongly-ordered memory access to
complete, see Ordering of instructions that change the CPSR interrupt masks on page AppxG-8 for more
information.
ARMv6 deprecated any reliance on this behavior, and this behavior is obsoleted in ARMv7.
D.3.3 ARM LDM and POP instructions that both write back and load their base registers
LDM instructions and multi-register POP instructions that specify base register writeback and load their
base register are permitted but deprecated before ARMv7, as described in Different definition of some LDM
and POP instructions on page AppxG-15. Use of such instructions is obsolete in ARMv7.
AppxD-6 Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. ARM DDI 0406B