Rollup merge of rust-lang#57273 - alexcrichton:update-stdsimd, r=niko…

…matsakis Update the stdsimd submodule Add a new cmpxchg16b intrinsics for x86_64 and some corrections for ARM/AArch64
Mark-Simulacrum · Jan 3, 2019 · cf56d3f · cf56d3f
2 parents f05bd30 + c0662a0
commit cf56d3f
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diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
@@ -110,6 +110,7 @@
 #![feature(aarch64_target_feature)]
 #![feature(wasm_target_feature)]
 #![feature(avx512_target_feature)]
+#![cfg_attr(not(stage0), feature(cmpxchg16b_target_feature))]
 #![feature(const_slice_len)]
 #![feature(const_str_as_bytes)]
 #![feature(const_str_len)]

diff --git a/src/stdsimd b/src/stdsimd