Re: [PATCH 0/3] RISC-V: Support -march=native

My plan is going to support -mcpu=native and -mtune=native once this
patchset lands, and I guess...this might not be so interesting, so I
will go ahead and commit this next week if no review comments :)

Kito Cheng <[email protected]> 於 2026年8月20日週四 下午4:12寫道：
>
> This patch series adds support for -march=native. It detects the supported
> extensions through hwprobe and /proc/cpuinfo, and includes /proc/cpuinfo data
> from several real machines in the tests.
>
> Kito Cheng (3):
>   RISC-V: Move the hwprobe interface description into a .def file
>   RISC-V: Support -march=native on Linux hosts
>   RISC-V: Fall back on /proc/cpuinfo when hwprobe is unavailable
>
>  gcc/common/config/riscv/riscv-common.cc       |  15 +-
>  gcc/common/config/riscv/riscv-hwprobe.def     | 146 +++++++
>  gcc/common/config/riscv/riscv-hwprobe.h       |  91 +++++
>  gcc/config.host                               |   8 +
>  gcc/config/riscv/driver-riscv.cc              | 378 ++++++++++++++++++
>  gcc/config/riscv/riscv-subset.h               |   1 +
>  gcc/config/riscv/riscv.h                      |  19 +-
>  gcc/config/riscv/x-riscv                      |   6 +
>  gcc/doc/invoke.texi                           |  10 +
>  .../gcc.target/riscv/cpunative/info_0         |  20 +
>  .../gcc.target/riscv/cpunative/info_1         |  10 +
>  .../gcc.target/riscv/cpunative/info_2         |  39 ++
>  .../gcc.target/riscv/cpunative/info_3         |  71 ++++
>  .../gcc.target/riscv/cpunative/info_4         | 287 +++++++++++++
>  .../gcc.target/riscv/cpunative/native_cpu_0.c |  17 +
>  .../gcc.target/riscv/cpunative/native_cpu_1.c |  17 +
>  .../gcc.target/riscv/cpunative/native_cpu_2.c |  14 +
>  .../gcc.target/riscv/cpunative/native_cpu_3.c |  18 +
>  .../gcc.target/riscv/cpunative/native_cpu_4.c |  17 +
>  .../gcc.target/riscv/cpunative/native_cpu_5.c |  16 +
>  .../gcc.target/riscv/cpunative/native_cpu_6.c |  22 +
>  .../riscv/cpunative/riscv-cpunative.exp       |  35 ++
>  .../gcc.target/riscv/march-native-1.c         |  21 +
>  gcc/testsuite/lib/target-supports.exp         |  14 +
>  libgcc/config/riscv/feature_bits.c            | 194 +--------
>  25 files changed, 1293 insertions(+), 193 deletions(-)
>  create mode 100644 gcc/common/config/riscv/riscv-hwprobe.def
>  create mode 100644 gcc/common/config/riscv/riscv-hwprobe.h
>  create mode 100644 gcc/config/riscv/driver-riscv.cc
>  create mode 100644 gcc/config/riscv/x-riscv
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/info_0
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/info_1
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/info_2
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/info_3
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/info_4
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_0.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_1.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_2.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_3.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_4.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_5.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/native_cpu_6.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/cpunative/riscv-cpunative.exp
>  create mode 100644 gcc/testsuite/gcc.target/riscv/march-native-1.c
>
> --
> 2.53.0
>