Changes from v1 - https://gcc.gnu.org/pipermail/gcc-patches/2023-November/635531.html
* [PATCH 4/5] - For `error_at' message, put feature name in quotes. * [PATCH 4/5] - For `aarch64_retrieve_sysreg' function, add description of new parameter to comments. * [PATCH 5/5] - Reduce the minimum arch requirements of the system register unit tests, selectively using `#pragma GCC target' when testing 128-bit sysreg r/w functions. --- Given the introduction of optional 128-bit page table descriptor and translation hardening extension support with the Arm9.4-a architecture, this patch series introduces the necessary changes to the aarch64-specific builtin code to enable the reading and writing of 128-bit system registers. In so doing, the following ACLE builtins and feature macro are made available to the compiler: * __uint128_t __arm_rsr128(const char *special_register); * void __arm_wsr128(const char *special_register, __uint128_t value); * __ARM_FEATURE_SYSREG128. Finally, in order to update the GCC system-register database bringing it in line with Binutils, and in so doing add the relevant 128-bit system registers to GCC, this patch also introduces the Guarded Control Stack (GCS) `+gcs' architecture modifier flag, allowing the inclusion of the novel GCS system registers which are now supported and also present in the `aarch64-sys-regs.def' system register database. Victor Do Nascimento (5): aarch64: Add march flags for +the and +d128 arch extensions aarch64: Add support for GCS system registers with the +gcs modifier aarch64: Sync `aarch64-sys-regs.def' with Binutils. aarch64: Implement 128-bit extension to ACLE sysreg r/w builtins aarch64: Add rsr128 and wsr128 ACLE tests gcc/config/aarch64/aarch64-arches.def | 2 + gcc/config/aarch64/aarch64-builtins.cc | 50 ++++++++++++++++--- gcc/config/aarch64/aarch64-c.cc | 1 + .../aarch64/aarch64-option-extensions.def | 6 +++ gcc/config/aarch64/aarch64-protos.h | 2 +- gcc/config/aarch64/aarch64-sys-regs.def | 30 +++++++---- gcc/config/aarch64/aarch64.cc | 9 +++- gcc/config/aarch64/aarch64.h | 21 ++++++++ gcc/config/aarch64/aarch64.md | 18 +++++++ gcc/config/aarch64/arm_acle.h | 11 ++++ gcc/doc/invoke.texi | 8 +++ gcc/testsuite/gcc.target/aarch64/acle/rwsr.c | 32 ++++++++++++ 12 files changed, 170 insertions(+), 20 deletions(-) -- 2.42.0
