SVE types and intrinsics

[JamieCunliffe]

All the SVE intrinsics along with updates to the intrinsic test tool to allow for SVE to be tested.

CI will fail until the rustc changes are merged.

[rustbot]

r? @Amanieu

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[bjorn3]

For reference the rustc PR seems to be rust-lang/rust#118917.

[bors]

☔ The latest upstream changes (presumably 5ef6eb4) made this pull request unmergeable. Please resolve the merge conflicts.

[tgross35]

Please redirect this discussion to https://rust-lang.zulipchat.com/.

[ruanyuxin]

I want to automatically generate the test codes sve.rs and sve2.rs by myself, so I run "RUST_BACKTRACE=full./target/release/stdarch-gen2 crates/stdarch-gen2/spec/sve crates/core_arch/src/aarch64/sve" in the ~/stdarch/stdarch directory.The results show that the problem lies in the fact that different versions of proc-macro2 have different supports for punctuation marks. In newer versions,"{" and "}" can be used as punctuation marks, but this is not supported in older versions. But my proc-macro2=1.0.101. Later, I tried other methods to generate curly braces myself, such as ①tokens.append_all(quote!) {{});" ②tokens.extend(TokenStream::from_str("{").unwrap()); ③tokens.extend(parse_str::("{").unwrap());
The result was still an error. May I ask if there are any solutions