[llvm] [RISCV]Add Sm1p13、Ss1p13 extensions (PR #121634)

[Jessica Clarke via llvm-commits]

jrtc27 wrote:

> [RISCV]Add Sm1p13、Ss1p13 extensions

* Still missing the space after ]
* `、` is not a comma and a space, it's a single character that looks like a backwards comma
* Sm1p13 and Ss1p13 are not actual ISA extensions that this patch makes LLVM support

> According to the newest RISC-V Privileged Spec v1.13, CSRs have been updated. And [mh]edelegh CSRs are just for RV32.

* "CSRs have been updated" sounds like you've changed existing ones
* "And [mh]edelegh CSRs are just for RV32" sounds like you've changed them, not added them

A better commit message would be something like:

> [RISCV] Support [mh]edelegh
>
> These RV32-only CSRs are defined in privileged spec v1.13.

or:

> [RISCV] Support RV32-only [mh]edelegh CSRs from privileged spec 1.13

https://github.com/llvm/llvm-project/pull/121634