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

Assembler syntax
CDP{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 CDP2 instruction must be
unconditional.
The name of the coprocessor, and causes the corresponding coprocessor number to be
placed in the cp_num field of the instruction. The standard generic coprocessor names are
p0, p1, …, p15.
Is a coprocessor-specific opcode, in the range 0 to 15.
The destination coprocessor register for the instruction.
The coprocessor register that contains the first operand.
The coprocessor register that contains the second operand.
Is a coprocessor-specific opcode in the range 0 to 7. If it is omitted, is 0.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
if !Coproc_Accepted(cp, ThisInstr()) then
GenerateCoprocessorException();
else
Coproc_InternalOperation(cp, ThisInstr());
Exceptions
Undefined Instruction.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-69