1 files changed, 15 insertions, 0 deletions
diff --git a/third_party/rust/sha2/src/sha256/aarch64.rs b/third_party/rust/sha2/src/sha256/aarch64.rs
new file mode 100644
index 0000000000..7eaa2de73c
--- /dev/null
+++ b/third_party/rust/sha2/src/sha256/aarch64.rs
@@ -0,0 +1,15 @@
+//! SHA-256 `aarch64` backend.
+
+// TODO: stdarch intrinsics: RustCrypto/hashes#257
+
+cpufeatures::new!(sha2_hwcap, "sha2");
+
+pub fn compress(state: &mut [u32; 8], blocks: &[[u8; 64]]) {
+    // TODO: Replace with https://github.com/rust-lang/rfcs/pull/2725
+    // after stabilization
+    if sha2_hwcap::get() {
+        sha2_asm::compress256(state, blocks);
+    } else {
+        super::soft::compress(state, blocks);
+    }
+}