Ping!! ________________________________ From: Srinath Parvathaneni <[email protected]> Sent: 11 August 2026 17:13 To: [email protected] <[email protected]> Cc: Alice Carlotti <[email protected]>; Alex Coplan <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: [PATCH v2][GCC] aarch64: Add support for ACLE hint intrinsics
Hi, Changes v1 -> v2: * Rebase the old v1 patch: https://gcc.gnu.org/legacy-ml/gcc-patches/2019-05/msg01925.html * Add memory clobbers to the hint instruction patterns so that the builtins are treated as affecting memory. * Update the tests to reflect the addition of the memory clobbers. * Change the hint intrinsic definitions in arm_acle.h from inline functions to macro expansions. ------------------------------------------------------------------- This patch adds support for ACLE system hint intrinsics __yield(), __wfe(), __wfi(), __sev() and __sevl() and their corresponding AArch64 builtins. The ACLE specification is available at [1]. Regression tested on aarch64-none-linux-gnu with no regressions. Ok for trunk? Thanks, Srinath gcc/ChangeLog: * config/aarch64/aarch64-builtins.cc (enum aarch64_builtins): Add AARCH64_BUILTIN_YIELD, AARCH64_BUILTIN_WFE, AARCH64_BUILTIN_WFI, AARCH64_BUILTIN_SEV and AARCH64_BUILTIN_SEVL. (aarch64_init_syshintop_builtins): New function. (aarch64_general_init_builtins): Call aarch64_init_syshintop_builtins. (aarch64_general_expand_builtin): Expand the system hint builtins. * config/aarch64/aarch64.md (unspecv): Add UNSPECV_YIELD, UNSPECV_WFE, UNSPECV_WFI, UNSPECV_SEV and UNSPECV_SEVL. (yield): New insn pattern. (wfe): Likewise. (wfi): Likewise. (sev): Likewise. (sevl): Likewise. * config/aarch64/arm_acle.h (__yield): Define hint intrinsics. (__wfe): Likewise. (__wfi): Likewise. (__sev): Likewise. (__sevl): Likewise. gcc/testsuite/ChangeLog: * gcc.target/aarch64/acle/hint-1.c: New test. * gcc.target/aarch64/acle/hint-2.c: Likewise. [1] https://github.com/ARM-software/acle/blob/main/main/acle.md#hints --- gcc/config/aarch64/aarch64-builtins.cc | 51 ++++++++++++ gcc/config/aarch64/aarch64.md | 45 +++++++++++ gcc/config/aarch64/arm_acle.h | 16 ++++ .../gcc.target/aarch64/acle/hint-1.c | 26 +++++++ .../gcc.target/aarch64/acle/hint-2.c | 77 +++++++++++++++++++ 5 files changed, 215 insertions(+) create mode 100644 gcc/testsuite/gcc.target/aarch64/acle/hint-1.c create mode 100644 gcc/testsuite/gcc.target/aarch64/acle/hint-2.c
