1 files changed, 39 insertions, 0 deletions
diff --git a/vendor/memchr/src/memmem/prefilter/wasm.rs b/vendor/memchr/src/memmem/prefilter/wasm.rs
new file mode 100644
index 000000000..5470c922a
--- /dev/null
+++ b/vendor/memchr/src/memmem/prefilter/wasm.rs
@@ -0,0 +1,39 @@
+use core::arch::wasm32::v128;
+
+use crate::memmem::{
+    prefilter::{PrefilterFnTy, PrefilterState},
+    NeedleInfo,
+};
+
+// Check that the functions below satisfy the Prefilter function type.
+const _: PrefilterFnTy = find;
+
+/// A `v128`-accelerated candidate finder for single-substring search.
+#[target_feature(enable = "simd128")]
+pub(crate) fn find(
+    prestate: &mut PrefilterState,
+    ninfo: &NeedleInfo,
+    haystack: &[u8],
+    needle: &[u8],
+) -> Option<usize> {
+    unsafe {
+        super::genericsimd::find::<v128>(
+            prestate,
+            ninfo,
+            haystack,
+            needle,
+            super::simple_memchr_fallback,
+        )
+    }
+}
+
+#[cfg(all(test, feature = "std"))]
+mod tests {
+    #[test]
+    #[cfg(not(miri))]
+    fn prefilter_permutations() {
+        use crate::memmem::prefilter::tests::PrefilterTest;
+        // SAFETY: super::find is safe to call for all inputs on x86.
+        unsafe { PrefilterTest::run_all_tests(super::find) };
+    }
+}