A.1 Use of R15 by Instruction

All uses of R15 as a named register specifier for a source register that is described as unpredictable take an undefined exception trap.

For information on unpredictable registers, see the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.

Non-ConfidentialPDF file icon PDF version100442_0200_00_en
Copyright © 2016–2018 Arm Limited or its affiliates. All rights reserved.