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Neon fast path for str::contains #152176

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Neon fast path for str::contains #152176

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9 changes: 6 additions & 3 deletions library/core/src/str/pattern.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -997,7 +997,8 @@ impl<'b> Pattern for &'b str {

#[cfg(any(
all(target_arch = "x86_64", target_feature = "sse2"),
all(target_arch = "loongarch64", target_feature = "lsx")
all(target_arch = "loongarch64", target_feature = "lsx"),
all(target_arch = "aarch64", target_feature = "neon")
))]
if self.len() <= 32 {
if let Some(result) = simd_contains(self, haystack) {
Expand Down Expand Up @@ -1782,7 +1783,8 @@ impl TwoWayStrategy for RejectAndMatch {
/// [0]: http://0x80.pl/articles/simd-strfind.html#sse-avx2
#[cfg(any(
all(target_arch = "x86_64", target_feature = "sse2"),
all(target_arch = "loongarch64", target_feature = "lsx")
all(target_arch = "loongarch64", target_feature = "lsx"),
all(target_arch = "aarch64", target_feature = "neon")
))]
#[inline]
fn simd_contains(needle: &str, haystack: &str) -> Option<bool> {
Expand Down Expand Up @@ -1917,7 +1919,8 @@ fn simd_contains(needle: &str, haystack: &str) -> Option<bool> {
/// Both slices must have the same length.
#[cfg(any(
all(target_arch = "x86_64", target_feature = "sse2"),
all(target_arch = "loongarch64", target_feature = "lsx")
all(target_arch = "loongarch64", target_feature = "lsx"),
all(target_arch = "aarch64", target_feature = "neon")
))]
#[inline]
unsafe fn small_slice_eq(x: &[u8], y: &[u8]) -> bool {
Expand Down
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