On Mon, Nov 16, 2015 at 8:31 AM, Matthew Wahab <matthew.wa...@foss.arm.com> wrote: > Hello, > > The command line options for target selection allow ARMv8.1 extensions > to be individually enabled/disabled. They also allow the extensions to > be enabled with -march=armv8-a. This doesn't reflect the ARMv8.1 > architecture which requires all extensions to be enabled and doesn't make > them available for ARMv8. > > This patch removes the options for the individual ARMv8.1 extensions > except for +lse. This means that setting -march=armv8.1-a will enable > all extensions required by ARMv8.1 and that the ARMv8.1 extensions can't > be used with -march=armv8. > > The exception to this is +lse since there may be existing code expecting > to be built with -march=armv8-a+lse. Note that +crc, which is enabled by > -march=armv8.1-a, is still an option for -march=armv8-a. > > This patch depends on the patch series > https://gcc.gnu.org/ml/gcc-patches/2015-10/msg02429.html. > > Tested aarch64-none-elf with cross-compiled check-gcc and > aarch64-none-linux-gnu with native bootstrap and make check.
I like this patch. Note I was going to soon submit patches to change thunderx over to 8.1-a and add thunderxt88pass1 which is 8-a. But I need a few more patches to get to get that. Thanks, Andrew > > Ok for trunk? > Matthew > > gcc/ > 2015-11-16 Matthew Wahab <matthew.wa...@arm.com> > > * config/aarch64/aarch64-options-extensions.def: Remove > AARCH64_FL_RDMA from "fp" and "simd". Remove "pan", "lor", > "rdma". > * config/aarch64/aarch64.h (AARCH64_FL_PAN): Remove. > (AARCH64_FL_LOR): Remove. > (AARCH64_FL_RDMA): Remove. > (AARCH64_FL_V8_1): New. > (AARCH64_FL_FOR_AARCH8_1): Replace AARCH64_FL_PAN, AARCH64_FL_LOR > and AARCH64_FL_RDMA with AARCH64_FL_V8_1. > (AARCH64_ISA_RDMA): Replace AARCH64_FL_RDMA with AARCH64_FL_V8_1. > * doc/invoke.texi (AArch64 - Feature Modifiers): Remove "pan", > "lor" and "rdma".
