ARM VERSION 1.2 - Manual (Page 184)

ARM Instruction Reference
4-74 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
4.8.3 MSR
Load specified fields of the CPSR or SPSR with an immediate constant, or from the
contents of a general-purpose register.
Syntax
MSR{cond} <psr>_<fields>, #immed_8r
MSR{cond} <psr>_<fields>, Rm
where:
cond is an optional condition code (see Conditional execution on page 4-4).
<psr>
is either CPSR or SPSR.
<fields>
specifies the field or fields to be moved. <fields> can be one or more of:
c control field mask byte (PSR[7:0])
x extension field mask byte (PSR[15:8])
s status field mask byte (PSR[23:16)
f flags field mask byte (PSR[31:24]).
immed_8r is an expression evaluating to a numeric constant. The constant must
correspond to an 8-bit pattern rotated by an even number of bits within a
32-bit word.
Rm is the source register.
Usage
See MRS on page 4-73.
Condition flags
This instruction updates the flags explicitly if the f field is specified.
Architectures
This instruction is available in ARM architecture versions 3 and above.