RISC-V Code Size Reduction(ZC*) extensions is a group of extensions which define subsets of the existing C extension (Zca, Zcd, Zcf) and new extensions(Zcb, Zcmp, Zcmt) which only contain 16-bit encodings.[1]
The implementation of the RISC-V Code Size Reduction extension in GCC is an important step towards making the RISC-V architecture more efficient. The cooperation with OpenHW group has played a crucial role in this effort, with facilitating the implementation, testing and validation. Currently works can also find in OpenHW group's github repo.[2] Thanks to Tariq Kurd, Ibrahim Abu Kharmeh for help with explain the specification, and Jeremy Bennett's patient guidance throughout the whole development process. [1] github.com/riscv/riscv-code-size-reduction/tree/main/Zc-specification [2] github.com/openhwgroup/corev-gcc Co-Authored by: Charlie Keaney <charlie.kea...@embecosm.com> Co-Authored by: Mary Bennett <mary.benn...@embecosm.com> Co-Authored by: Nandni Jamnadas <nandni.jamna...@embecosm.com> Co-Authored by: Sinan Lin <sinan....@linux.alibaba.com> Co-Authored by: Simon Cook <simon.c...@embecosm.com> Co-Authored by: Shihua Liao <shi...@iscas.ac.cn> Co-Authored by: Yulong Shi <yul...@iscas.ac.cn> RISC-V: Minimal support for ZC extensions. RISC-V: Enable compressible features when use ZC* extensions. RISC-V: Add ZC* test for march args being passed. RISC-V: Add Zcmp extension supports. RISC-V: Add ZCMP push/pop testcases. gcc/common/config/riscv/riscv-common.cc | 39 ++ gcc/config.gcc | 2 +- gcc/config/riscv/predicates.md | 16 + gcc/config/riscv/riscv-c.cc | 2 +- gcc/config/riscv/riscv-opts.h | 16 + gcc/config/riscv/riscv-passes.def | 1 + gcc/config/riscv/riscv-protos.h | 4 + gcc/config/riscv/riscv-shorten-memrefs.cc | 3 +- gcc/config/riscv/riscv-zcmp-popret.cc | 260 ++++++++++ gcc/config/riscv/riscv.cc | 453 +++++++++++++++++- gcc/config/riscv/riscv.h | 6 +- gcc/config/riscv/riscv.md | 3 + gcc/config/riscv/riscv.opt | 3 + gcc/config/riscv/t-riscv | 4 + gcc/config/riscv/zc.md | 47 ++ gcc/testsuite/gcc.target/riscv/arch-20.c | 5 + gcc/testsuite/gcc.target/riscv/arch-21.c | 5 + gcc/testsuite/gcc.target/riscv/zc-zca-arch.c | 9 + gcc/testsuite/gcc.target/riscv/zc-zcb-arch.c | 9 + .../gcc.target/riscv/zc-zcb-m-arch.c | 9 + .../gcc.target/riscv/zc-zcb-zba-arch.c | 9 + .../gcc.target/riscv/zc-zcb-zbb-arch.c | 9 + gcc/testsuite/gcc.target/riscv/zc-zcf-arch.c | 9 + gcc/testsuite/gcc.target/riscv/zc-zcmp-arch.c | 9 + .../gcc.target/riscv/zc-zcmp-push-pop-1.c | 15 + .../gcc.target/riscv/zc-zcmp-push-pop-2.c | 17 + .../gcc.target/riscv/zc-zcmp-push-pop-3.c | 17 + .../gcc.target/riscv/zc-zcmp-push-pop-4.c | 17 + .../gcc.target/riscv/zc-zcmp-push-pop-5.c | 17 + .../gcc.target/riscv/zc-zcmp-push-pop-6.c | 13 + .../gcc.target/riscv/zc-zcmp-push-pop-7.c | 16 + .../gcc.target/riscv/zc-zcmpe-arch.c | 9 + .../gcc.target/riscv/zc-zcmpe-push-pop-1.c | 15 + .../gcc.target/riscv/zc-zcmpe-push-pop-2.c | 17 + .../gcc.target/riscv/zc-zcmpe-push-pop-3.c | 17 + .../gcc.target/riscv/zc-zcmpe-push-pop-4.c | 17 + .../gcc.target/riscv/zc-zcmpe-push-pop-5.c | 17 + .../gcc.target/riscv/zc-zcmpe-push-pop-6.c | 13 + .../gcc.target/riscv/zc-zcmpe-push-pop-7.c | 16 + gcc/testsuite/gcc.target/riscv/zc-zcmt-arch.c | 9 + 40 files changed, 1153 insertions(+), 21 deletions(-) create mode 100644 gcc/config/riscv/riscv-zcmp-popret.cc create mode 100644 gcc/config/riscv/zc.md create mode 100644 gcc/testsuite/gcc.target/riscv/arch-20.c create mode 100644 gcc/testsuite/gcc.target/riscv/arch-21.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zca-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcb-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcb-m-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcb-zba-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcb-zbb-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcf-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-1.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-2.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-3.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-4.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-5.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-6.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmp-push-pop-7.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-arch.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-1.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-2.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-3.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-4.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-5.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-6.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmpe-push-pop-7.c create mode 100644 gcc/testsuite/gcc.target/riscv/zc-zcmt-arch.c -- 2.25.1
