1 files changed, 37 insertions, 0 deletions
diff --git a/third_party/rust/crc32fast/src/specialized/mod.rs b/third_party/rust/crc32fast/src/specialized/mod.rs
new file mode 100644
index 0000000000..525a42c85c
--- /dev/null
+++ b/third_party/rust/crc32fast/src/specialized/mod.rs
@@ -0,0 +1,37 @@
+cfg_if! {
+    if #[cfg(all(
+        crc32fast_stdarchx86,
+        target_feature = "sse2",
+        any(target_arch = "x86", target_arch = "x86_64")
+    ))] {
+        mod pclmulqdq;
+        pub use self::pclmulqdq::State;
+    } else if #[cfg(all(feature = "nightly", target_arch = "aarch64"))] {
+        mod aarch64;
+        pub use self::aarch64::State;
+    } else {
+        #[derive(Clone)]
+        pub enum State {}
+        impl State {
+            pub fn new(_: u32) -> Option<Self> {
+                None
+            }
+
+            pub fn update(&mut self, _buf: &[u8]) {
+                match *self {}
+            }
+
+            pub fn finalize(self) -> u32 {
+                match self{}
+            }
+
+            pub fn reset(&mut self) {
+                match *self {}
+            }
+
+            pub fn combine(&mut self, _other: u32, _amount: u64) {
+                match *self {}
+            }
+        }
+    }
+}