* fix build after stabilization of cfg_target_feature and target_feature
* fix doc tests
* fix spurious unused_attributes warning
* fix more unused attribute warnings
* More unnecessary target features
* Remove no longer needed trait imports
* Remove fixed upstream workarounds
* Fix parsing the #[assert_instr] macro
Following upstream proc_macro changes
* Fix form and parsing of #[simd_test]
* Don't use Cargo features for testing modes
Instead use RUSTFLAGS with `--cfg`. This'll help us be compatible with the
latest Cargo where a tweak to workspaces and features made the previous
invocations we had invalid.
* Don't thread RUSTFLAGS through docker
* Re-gate on x86 verification
Closes#411
This commit stabilizes all intrinsics in the `x86` and `x86_64` modules, namely
allowing stabilization of the `arch::x86` and `arch::x86_64` module in libstd.
Stabilizations here were applied in an automated fashion using [this
script][scr], and notably everything related to `__m64` was omitted from this
round of stabilization
[scr]: https://gist.github.com/alexcrichton/5b456d495d6fe1df46a158754565c7a5
The public API isn't changing in this commit but the internal organization is
being rejiggered. Instead of `x86/$subtarget/$feature.rs` the folders are
changed to `coresimd/x86/$feature.rs` and `coresimd/x86_64/$feature.rs`. The
`arch::x86_64` then reexports both the contents of the `x86` module and the
`x86_64` module.
