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

Operation
if ConditionPassed() then
EncodingSpecificOperations();
if write_nzcvq then
APSR.N = R[n];
APSR.Z = R[n];
APSR.C = R[n];
APSR.V = R[n];
APSR.Q = R[n];
if write_g then
APSR.GE = R[n];
Exceptions
None.
Usage
Instruction Details
For details of the APSR see The Application Program Status Register (APSR) on page A2-14. Because of
the Do-Not-Modify nature of its reserved bits, a read / modify / write sequence is normally needed when the
MSR instruction is being used at Application level and its destination is not APSR_nzcvq (CPSR_f).
For the A and R profiles, MSR (register) on page B6-14 describes additional functionality that is available
using the reserved bits. This includes some deprecated functionality that is available in unprivileged and
privileged modes and therefore can be used at the Application level.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-211