Bug 468979 - Add support for RISC-V vector instructions
Summary: Add support for RISC-V vector instructions
Status: REPORTED
Alias: None
Product: valgrind
Classification: Developer tools
Component: vex (show other bugs)
Version: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Julian Seward
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-04-26 01:50 UTC by JojoR
Modified: 2024-02-13 06:59 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:


Attachments

Note You need to log in before you can comment on or make changes to this bug.
Description JojoR 2023-04-26 01:50:59 UTC
We consider to add RVV/Vector [1] feature in valgrind, there are some challenges.
RVV like ARM's SVE [2] programming model, it's scalable/VLA, that means the vector length is agnostic.
ARM's SVE is not supported in valgrind :(

See more details from RFC [3]

[1] https://github.com/riscv/riscv-v-spec
[2] https://community.arm.com/arm-research/b/articles/posts/the-arm-scalable-vector-extension-sve
[3] https://sourceforge.net/p/valgrind/mailman/valgrind-developers/thread/84b7a55c-1868-ca14-2626-ffb88925741a%40linux.alibaba.com/#msg37834524
Comment 1 JojoR 2023-08-30 09:45:46 UTC
Hi,

We are glad to open source RVV implementation here:

https://github.com/rjiejie/valgrind-riscv64

4 kinds extra ISAs were added in this repo:

RV64Zfh : Half-precision floating-point
RV64Xthead [1] : T-HEAD vendor extension for RV64G
RV64V0p7 [2] : Vector 0.7.1
RV64V [3] : Vector 1.0

[1] https://github.com/T-head-Semi/thead-extension-spec
[2] https://github.com/riscv/riscv-v-spec/releases/tag/0.7.1
[3] https://github.com/riscv/riscv-v-spec/releases/tag/v1.0