diff --git a/core/src/lib.rs b/core/src/lib.rs
index 9306581dca93d..e74900ff7471b 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -264,6 +264,7 @@
 #![feature(sse4a_target_feature)]
 #![feature(tbm_target_feature)]
 #![feature(wasm_target_feature)]
+#![feature(x86_amx_intrinsics)]
 // tidy-alphabetical-end
 
 // allow using `core::` in intra-doc links
diff --git a/stdarch b/stdarch
index df3618d9f3516..47b929ddc521a 160000
--- a/stdarch
+++ b/stdarch
@@ -1 +1 @@
-Subproject commit df3618d9f35165f4bc548114e511c49c29e1fd9b
+Subproject commit 47b929ddc521a78b0f699ba8d5c274d28593448a