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

Assembler syntax
MCR{2} , #, , , {, #}
where:
2 If specified, selects encoding T2 / A2. If omitted, selects encoding T1 / A1.
Instruction Details
See Standard assembler syntax fields on page A8-7. An ARM MCR2 instruction must be
unconditional.
The name of the coprocessor. The standard generic coprocessor names are p0, p1, …, p15.
Is a coprocessor-specific opcode in the range 0 to 7.
Is the ARM core register whose value is transferred to the coprocessor.
Is the destination coprocessor register.
Is an additional destination coprocessor register.
Is a coprocessor-specific opcode in the range 0-7. If omitted, is assumed to be 0.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
if !Coproc_Accepted(cp, ThisInstr()) then
GenerateCoprocessorException();
else
Coproc_SendOneWord(R[t], cp, ThisInstr());
Exceptions
Undefined Instruction.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-187