target/arm: Implement FEAT_CSSC, FEAT_CMPBR

[PATCH 00/11] target/arm: Implement FEAT_CSSC, FEAT_CMPBR

Richard Henderson posted 11 patches 3 months, 2 weeks ago

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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20250803014019.416797-1-richard.henderson@linaro.org

Maintainers: Laurent Vivier <laurent@vivier.eu>, Peter Maydell <peter.maydell@linaro.org>

linux-user/loader.h            |   2 +-
target/arm/cpu-features.h      |  10 ++
linux-user/elfload.c           |  12 +-
target/arm/tcg/cpu64.c         |   1 +
target/arm/tcg/translate-a64.c | 219 +++++++++++++++++++++++++++++++--
docs/system/arm/emulation.rst  |   2 +
target/arm/tcg/a64.decode      |  26 ++++
7 files changed, 256 insertions(+), 16 deletions(-)

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[PATCH 00/11] target/arm: Implement FEAT_CSSC, FEAT_CMPBR

Posted by Richard Henderson 3 months, 2 weeks ago

These two extensions are related due to sharing ID_AA64ISAR2.CSSC.

I had intended to test by bootstrapping gcc under emulation with
-march=native (that seemed the easiest way to test the short
range branches), but that failed for unrelated reasons.

I'll try again next week.


r~


Richard Henderson (11):
  target/arm: Add feature predicate for FEAT_CSSC
  target/arm: Implement MIN/MAX (immediate)
  target/arm: Implement MIN/MAX (register)
  target/arm: Split out gen_wrap2_i32 helper
  target/arm: Implement CTZ, CNT, ABS
  target/arm: Enable FEAT_CSSC for -cpu max
  target/arm: Add feature predicate for FEAT_CMPBR
  target/arm: Implement CB, CBB, CBH
  target/arm: Implement CB (immediate)
  linux-user: Change exported get_elf_hwcap to abi_ulong
  target/arm: Enable FEAT_CMPBR for -cpu max

 linux-user/loader.h            |   2 +-
 target/arm/cpu-features.h      |  10 ++
 linux-user/elfload.c           |  12 +-
 target/arm/tcg/cpu64.c         |   1 +
 target/arm/tcg/translate-a64.c | 219 +++++++++++++++++++++++++++++++--
 docs/system/arm/emulation.rst  |   2 +
 target/arm/tcg/a64.decode      |  26 ++++
 7 files changed, 256 insertions(+), 16 deletions(-)

-- 
2.43.0

Re: [PATCH 00/11] target/arm: Implement FEAT_CSSC, FEAT_CMPBR

Posted by Peter Maydell 3 months ago

On Sun, 3 Aug 2025 at 02:40, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> These two extensions are related due to sharing ID_AA64ISAR2.CSSC.
>
> I had intended to test by bootstrapping gcc under emulation with
> -march=native (that seemed the easiest way to test the short
> range branches), but that failed for unrelated reasons.
>
> I'll try again next week.
>
>
> r~
>
>
> Richard Henderson (11):
>   target/arm: Add feature predicate for FEAT_CSSC
>   target/arm: Implement MIN/MAX (immediate)
>   target/arm: Implement MIN/MAX (register)
>   target/arm: Split out gen_wrap2_i32 helper
>   target/arm: Implement CTZ, CNT, ABS
>   target/arm: Enable FEAT_CSSC for -cpu max

I've applied this bits (FEAT_CSSC) to target-arm.next for
10.2; thanks.

-- PMM