riscv toolchain update

[nihui]

gcc https://github.com/riscv-collab/riscv-gcc/tree/riscv-gcc-rvv-next/gcc/config/riscv clang https://github.com/llvm/llvm-project/blob/main/clang/include/clang/Basic/riscv_vector.td rvv https://github.com/riscv-non-isa/rvv-intrinsic-doc/blob/master/rvv-intrinsic-rfc.md

build error https://github.com/felixonmars/archriscv-packages/commit/0a6a7360b90d5c28eb4d66d52b3df1dcf7f8f854

• [ ] update gcc toolchain ci (https://zhuanlan.zhihu.com/p/492845064)
• [ ] add clang toolchain ci
• [ ] change word_type to size_t

[thelastlin]

I built a new gcc from riscv-collab/riscv-gcc.git:riscv-gcc-rvv-next(edffbea) with upstream binutils, and it seems that it doesn't require a lot of memory with make linux -j 8.

And it seems that we need some work for replacing tuple types in rvv intrinsic, because of upstream changes like new interface for segment load/store operation. I might to start this work soon.

Some discussion:

1. Should we add another ci profile for new gcc toolchain, or just update it?
2. Should we add some wrapper for compilers that uses tuple types(e.g. vfloat32m1x4)?

[lhtin]

2. Should we add some wrapper for compilers that uses tuple types(e.g. vfloat32m1x4)?

Hello, there already have tuple type version of segment load/store intrinsics on GCC implementation.

[thelastlin]

Hello, there already have tuple type version of segment load/store intrinsics on GCC implementation.

Thanks for your reply. It seems that clang-14 doesn't have the tuple version of segment load/store intrinsics, and some old GNU toolchains (for example, one currently used in ci) only have the tuple ones. I'm not sure about dropping these old toolchains support.

[zhongjuzhe]

@thelastlin
The old toolchain is no longer maintained. The "rvv-next" is the latest actively maintaining branch and will be eventually push GCC FSF upstream. It support tuple types too. So I would suggest you use the new RVV GCC

[thelastlin]

The "rvv-next" is the latest actively maintaining branch and will be eventually push GCC FSF upstream. It support tuple types too. So I would suggest you use the new RVV GCC

Thanks for your reply and your awesome work on GCC!

But it seems that it doesn't have document about the tuple types. I checked out the old document(riscv-non-isa/rvv-intrinsic-doc.git: 459a793), and vcreate doesn't provided for the tuple types. Would you like to provide some notes about the tuple types?

[nihui]

update riscv ci toolchain to gcc rvv-next branch and clang 15.0.1