```
warning: the feature `cmpxchg16b_target_feature` has been stable since 1.69.0-nightly and no longer requires an attribute to enable
--> crates/core_arch/src/lib.rs:24:5
|
24 | cmpxchg16b_target_feature,
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(stable_features)]` on by default
warning: the feature `target_feature_11` has been stable since 1.69.0-nightly and no longer requires an attribute to enable
--> crates/core_arch/src/lib.rs:34:5
|
34 | target_feature_11,
| ^^^^^^^^^^^^^^^^^
```
f16c_target_feature was recently stabilised.
This fixes a warning that results in a CI failure (due to `-D
stable-features`) with current nightly Rust.
The tests can run if and only if the target_features for the
corresponding intrinsics are detected at run-time, so make sure that the
tests have an appropriate `simd_test()`.
This fixes some failures due to tests running when they shouldn't. For
example, some tests would fail on hardware that lacks "fcma".
"arm" and "aarch64" support different sets of `target_feature` and
`simd_test` arguments, and for "arm", the set of features that can be
dynamically detected is different again. Restructure the generator code
to allow this to be expressed accurately (in future patches).
This implementation preserves the way that target features are specified
for shared intrinsics, because this has an impact on the generated
documentation. In particular, rustdoc cannot look inside
`cfg_attr(target_arch = ...)` tests, so we use unconditional
`target_feature` attributes where possible.
Implement by inline assembly for now, uses `pure, nomem, nostack` for
all packed simd arithmetic instructions. Uses `inlateout` when it
requires using the same register for input and output, use `lateout`
for all output registers.
This commit also includes a rearrangement of shared risc-v architecture
module to improve documents. It also includes a doc test fix, gate sm3/4
and use explict sm3/4 instruction under rustc target feature.
