diff options
Diffstat (limited to 'vendor/memchr/src/memmem/x86/sse.rs')
-rw-r--r-- | vendor/memchr/src/memmem/x86/sse.rs | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/vendor/memchr/src/memmem/x86/sse.rs b/vendor/memchr/src/memmem/x86/sse.rs deleted file mode 100644 index 22e7d9933..000000000 --- a/vendor/memchr/src/memmem/x86/sse.rs +++ /dev/null @@ -1,89 +0,0 @@ -use core::arch::x86_64::__m128i; - -use crate::memmem::{genericsimd, NeedleInfo}; - -/// An SSE accelerated vectorized substring search routine that only works on -/// small needles. -#[derive(Clone, Copy, Debug)] -pub(crate) struct Forward(genericsimd::Forward); - -impl Forward { - /// Create a new "generic simd" forward searcher. If one could not be - /// created from the given inputs, then None is returned. - pub(crate) fn new(ninfo: &NeedleInfo, needle: &[u8]) -> Option<Forward> { - if !cfg!(memchr_runtime_sse2) { - return None; - } - genericsimd::Forward::new(ninfo, needle).map(Forward) - } - - /// Returns the minimum length of haystack that is needed for this searcher - /// to work. Passing a haystack with a length smaller than this will cause - /// `find` to panic. - #[inline(always)] - pub(crate) fn min_haystack_len(&self) -> usize { - self.0.min_haystack_len::<__m128i>() - } - - #[inline(always)] - pub(crate) fn find( - &self, - haystack: &[u8], - needle: &[u8], - ) -> Option<usize> { - // SAFETY: sse2 is enabled on all x86_64 targets, so this is always - // safe to call. - unsafe { self.find_impl(haystack, needle) } - } - - /// The implementation of find marked with the appropriate target feature. - /// - /// # Safety - /// - /// This is safe to call in all cases since sse2 is guaranteed to be part - /// of x86_64. It is marked as unsafe because of the target feature - /// attribute. - #[target_feature(enable = "sse2")] - unsafe fn find_impl( - &self, - haystack: &[u8], - needle: &[u8], - ) -> Option<usize> { - genericsimd::fwd_find::<__m128i>(&self.0, haystack, needle) - } -} - -#[cfg(all(test, feature = "std", not(miri)))] -mod tests { - use crate::memmem::{prefilter::PrefilterState, NeedleInfo}; - - fn find( - _: &mut PrefilterState, - ninfo: &NeedleInfo, - haystack: &[u8], - needle: &[u8], - ) -> Option<usize> { - super::Forward::new(ninfo, needle).unwrap().find(haystack, needle) - } - - #[test] - fn prefilter_permutations() { - use crate::memmem::prefilter::tests::PrefilterTest; - - // SAFETY: sse2 is enabled on all x86_64 targets, so this is always - // safe to call. - unsafe { - PrefilterTest::run_all_tests_filter(find, |t| { - // This substring searcher only works on certain configs, so - // filter our tests such that Forward::new will be guaranteed - // to succeed. (And also remove tests with a haystack that is - // too small.) - let fwd = match super::Forward::new(&t.ninfo, &t.needle) { - None => return false, - Some(fwd) => fwd, - }; - t.haystack.len() >= fwd.min_haystack_len() - }) - } - } -} |