MRS (system coprocessor register to ARM register)
Move to ARM register from system coprocessor register.
Syntax
MRS
{
}
cond
,
Rn
coproc_register
MRS
{
} cond
APSR_nzcv
,
special_register
where:
cond
is an optional condition code.
coproc_register
is the name of the coprocessor register.
special_register
is the name of the coprocessor register that can be written to APSR_nzcv. This is only possible for the coprocessor register DBGDSCRint.
Rn
is the ARM destination register.
R
must not be PC.n
Usage
You can use this pseudo-instruction to read CP14 or CP15 coprocessor registers, with the exception of write-only registers. A complete list of the applicable coprocessor register names is in the ARMv7-AR Architecture Reference Manual. For example:
MRS R1, SCTLR ; writes the contents of the CP15 coprocessor ; register SCTLR into R1
Architectures
This pseudo-instruction is available in ARMv7-A and ARMv7-R in A32 and 32-bit T32 code.
There is no 16-bit version of this pseudo-instruction in T32.