Deleted vendor folder

3 files changed, 0 insertions, 1630 deletions

diff --git a/vendor/memchr/src/arch/x86_64/avx2/memchr.rs b/vendor/memchr/src/arch/x86_64/avx2/memchr.rs
deleted file mode 100644
index 59f8c7f..0000000
--- a/vendor/memchr/src/arch/x86_64/avx2/memchr.rs
+++ /dev/null
@@ -1,1352 +0,0 @@
-/*!
-This module defines 256-bit vector implementations of `memchr` and friends.
-
-The main types in this module are [`One`], [`Two`] and [`Three`]. They are for
-searching for one, two or three distinct bytes, respectively, in a haystack.
-Each type also has corresponding double ended iterators. These searchers are
-typically much faster than scalar routines accomplishing the same task.
-
-The `One` searcher also provides a [`One::count`] routine for efficiently
-counting the number of times a single byte occurs in a haystack. This is
-useful, for example, for counting the number of lines in a haystack. This
-routine exists because it is usually faster, especially with a high match
-count, then using [`One::find`] repeatedly. ([`OneIter`] specializes its
-`Iterator::count` implementation to use this routine.)
-
-Only one, two and three bytes are supported because three bytes is about
-the point where one sees diminishing returns. Beyond this point and it's
-probably (but not necessarily) better to just use a simple `[bool; 256]` array
-or similar. However, it depends mightily on the specific work-load and the
-expected match frequency.
-*/
-
-use core::arch::x86_64::{__m128i, __m256i};
-
-use crate::{arch::generic::memchr as generic, ext::Pointer, vector::Vector};
-
-/// Finds all occurrences of a single byte in a haystack.
-#[derive(Clone, Copy, Debug)]
-pub struct One {
-    /// Used for haystacks less than 32 bytes.
-    sse2: generic::One<__m128i>,
-    /// Used for haystacks bigger than 32 bytes.
-    avx2: generic::One<__m256i>,
-}
-
-impl One {
-    /// Create a new searcher that finds occurrences of the needle byte given.
-    ///
-    /// This particular searcher is specialized to use AVX2 vector instructions
-    /// that typically make it quite fast. (SSE2 is used for haystacks that
-    /// are too short to accommodate an AVX2 vector.)
-    ///
-    /// If either SSE2 or AVX2 is unavailable in the current environment, then
-    /// `None` is returned.
-    #[inline]
-    pub fn new(needle: u8) -> Option<One> {
-        if One::is_available() {
-            // SAFETY: we check that sse2 and avx2 are available above.
-            unsafe { Some(One::new_unchecked(needle)) }
-        } else {
-            None
-        }
-    }
-
-    /// Create a new finder specific to AVX2 vectors and routines without
-    /// checking that either SSE2 or AVX2 is available.
-    ///
-    /// # Safety
-    ///
-    /// Callers must guarantee that it is safe to execute both `sse2` and
-    /// `avx2` instructions in the current environment.
-    ///
-    /// Note that it is a common misconception that if one compiles for an
-    /// `x86_64` target, then they therefore automatically have access to SSE2
-    /// instructions. While this is almost always the case, it isn't true in
-    /// 100% of cases.
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    pub unsafe fn new_unchecked(needle: u8) -> One {
-        One {
-            sse2: generic::One::new(needle),
-            avx2: generic::One::new(needle),
-        }
-    }
-
-    /// Returns true when this implementation is available in the current
-    /// environment.
-    ///
-    /// When this is true, it is guaranteed that [`One::new`] will return
-    /// a `Some` value. Similarly, when it is false, it is guaranteed that
-    /// `One::new` will return a `None` value.
-    ///
-    /// Note also that for the lifetime of a single program, if this returns
-    /// true then it will always return true.
-    #[inline]
-    pub fn is_available() -> bool {
-        #[cfg(not(target_feature = "sse2"))]
-        {
-            false
-        }
-        #[cfg(target_feature = "sse2")]
-        {
-            #[cfg(target_feature = "avx2")]
-            {
-                true
-            }
-            #[cfg(not(target_feature = "avx2"))]
-            {
-                #[cfg(feature = "std")]
-                {
-                    std::is_x86_feature_detected!("avx2")
-                }
-                #[cfg(not(feature = "std"))]
-                {
-                    false
-                }
-            }
-        }
-    }
-
-    /// Return the first occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn find(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.find_raw(s, e)
-            })
-        }
-    }
-
-    /// Return the last occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn rfind(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.rfind_raw(s, e)
-            })
-        }
-    }
-
-    /// Counts all occurrences of this byte in the given haystack.
-    #[inline]
-    pub fn count(&self, haystack: &[u8]) -> usize {
-        // SAFETY: All of our pointers are derived directly from a borrowed
-        // slice, which is guaranteed to be valid.
-        unsafe {
-            let start = haystack.as_ptr();
-            let end = start.add(haystack.len());
-            self.count_raw(start, end)
-        }
-    }
-
-    /// Like `find`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn find_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::fwd_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.find_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `One` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // Note that we could call `self.avx2.find_raw` directly here. But that
-        // means we'd have to annotate this routine with `target_feature`.
-        // Which is fine, because this routine is `unsafe` anyway and the
-        // `target_feature` obligation is met by virtue of building a `One`.
-        // The real problem is that a routine with a `target_feature`
-        // annotation generally can't be inlined into caller code unless
-        // the caller code has the same target feature annotations. Namely,
-        // the common case (at time of writing) is for calling code to not
-        // have the `avx2` target feature enabled *at compile time*. Without
-        // `target_feature` on this routine, it can be inlined which will
-        // handle some of the short-haystack cases above without touching the
-        // architecture specific code.
-        self.find_raw_avx2(start, end)
-    }
-
-    /// Like `rfind`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn rfind_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::rev_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.rfind_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `One` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // See note in forward routine above for why we don't just call
-        // `self.avx2.rfind_raw` directly here.
-        self.rfind_raw_avx2(start, end)
-    }
-
-    /// Counts all occurrences of this byte in the given haystack represented
-    /// by raw pointers.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `0` will always be returned.
-    #[inline]
-    pub unsafe fn count_raw(&self, start: *const u8, end: *const u8) -> usize {
-        if start >= end {
-            return 0;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::count_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.count_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `One` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        self.count_raw_avx2(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn find_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.find_raw(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn rfind_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.rfind_raw(start, end)
-    }
-
-    /// Execute a count using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::count_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn count_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> usize {
-        self.sse2.count_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn find_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.find_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn rfind_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.rfind_raw(start, end)
-    }
-
-    /// Execute a count using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`One::count_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `One`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn count_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> usize {
-        self.avx2.count_raw(start, end)
-    }
-
-    /// Returns an iterator over all occurrences of the needle byte in the
-    /// given haystack.
-    ///
-    /// The iterator returned implements `DoubleEndedIterator`. This means it
-    /// can also be used to find occurrences in reverse order.
-    #[inline]
-    pub fn iter<'a, 'h>(&'a self, haystack: &'h [u8]) -> OneIter<'a, 'h> {
-        OneIter { searcher: self, it: generic::Iter::new(haystack) }
-    }
-}
-
-/// An iterator over all occurrences of a single byte in a haystack.
-///
-/// This iterator implements `DoubleEndedIterator`, which means it can also be
-/// used to find occurrences in reverse order.
-///
-/// This iterator is created by the [`One::iter`] method.
-///
-/// The lifetime parameters are as follows:
-///
-/// * `'a` refers to the lifetime of the underlying [`One`] searcher.
-/// * `'h` refers to the lifetime of the haystack being searched.
-#[derive(Clone, Debug)]
-pub struct OneIter<'a, 'h> {
-    searcher: &'a One,
-    it: generic::Iter<'h>,
-}
-
-impl<'a, 'h> Iterator for OneIter<'a, 'h> {
-    type Item = usize;
-
-    #[inline]
-    fn next(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'find_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next(|s, e| self.searcher.find_raw(s, e)) }
-    }
-
-    #[inline]
-    fn count(self) -> usize {
-        self.it.count(|s, e| {
-            // SAFETY: We rely on our generic iterator to return valid start
-            // and end pointers.
-            unsafe { self.searcher.count_raw(s, e) }
-        })
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        self.it.size_hint()
-    }
-}
-
-impl<'a, 'h> DoubleEndedIterator for OneIter<'a, 'h> {
-    #[inline]
-    fn next_back(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'rfind_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next_back(|s, e| self.searcher.rfind_raw(s, e)) }
-    }
-}
-
-impl<'a, 'h> core::iter::FusedIterator for OneIter<'a, 'h> {}
-
-/// Finds all occurrences of two bytes in a haystack.
-///
-/// That is, this reports matches of one of two possible bytes. For example,
-/// searching for `a` or `b` in `afoobar` would report matches at offsets `0`,
-/// `4` and `5`.
-#[derive(Clone, Copy, Debug)]
-pub struct Two {
-    /// Used for haystacks less than 32 bytes.
-    sse2: generic::Two<__m128i>,
-    /// Used for haystacks bigger than 32 bytes.
-    avx2: generic::Two<__m256i>,
-}
-
-impl Two {
-    /// Create a new searcher that finds occurrences of the needle bytes given.
-    ///
-    /// This particular searcher is specialized to use AVX2 vector instructions
-    /// that typically make it quite fast. (SSE2 is used for haystacks that
-    /// are too short to accommodate an AVX2 vector.)
-    ///
-    /// If either SSE2 or AVX2 is unavailable in the current environment, then
-    /// `None` is returned.
-    #[inline]
-    pub fn new(needle1: u8, needle2: u8) -> Option<Two> {
-        if Two::is_available() {
-            // SAFETY: we check that sse2 and avx2 are available above.
-            unsafe { Some(Two::new_unchecked(needle1, needle2)) }
-        } else {
-            None
-        }
-    }
-
-    /// Create a new finder specific to AVX2 vectors and routines without
-    /// checking that either SSE2 or AVX2 is available.
-    ///
-    /// # Safety
-    ///
-    /// Callers must guarantee that it is safe to execute both `sse2` and
-    /// `avx2` instructions in the current environment.
-    ///
-    /// Note that it is a common misconception that if one compiles for an
-    /// `x86_64` target, then they therefore automatically have access to SSE2
-    /// instructions. While this is almost always the case, it isn't true in
-    /// 100% of cases.
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    pub unsafe fn new_unchecked(needle1: u8, needle2: u8) -> Two {
-        Two {
-            sse2: generic::Two::new(needle1, needle2),
-            avx2: generic::Two::new(needle1, needle2),
-        }
-    }
-
-    /// Returns true when this implementation is available in the current
-    /// environment.
-    ///
-    /// When this is true, it is guaranteed that [`Two::new`] will return
-    /// a `Some` value. Similarly, when it is false, it is guaranteed that
-    /// `Two::new` will return a `None` value.
-    ///
-    /// Note also that for the lifetime of a single program, if this returns
-    /// true then it will always return true.
-    #[inline]
-    pub fn is_available() -> bool {
-        #[cfg(not(target_feature = "sse2"))]
-        {
-            false
-        }
-        #[cfg(target_feature = "sse2")]
-        {
-            #[cfg(target_feature = "avx2")]
-            {
-                true
-            }
-            #[cfg(not(target_feature = "avx2"))]
-            {
-                #[cfg(feature = "std")]
-                {
-                    std::is_x86_feature_detected!("avx2")
-                }
-                #[cfg(not(feature = "std"))]
-                {
-                    false
-                }
-            }
-        }
-    }
-
-    /// Return the first occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn find(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.find_raw(s, e)
-            })
-        }
-    }
-
-    /// Return the last occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn rfind(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.rfind_raw(s, e)
-            })
-        }
-    }
-
-    /// Like `find`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn find_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::fwd_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1() || b == self.sse2.needle2()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.find_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `Two` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // Note that we could call `self.avx2.find_raw` directly here. But that
-        // means we'd have to annotate this routine with `target_feature`.
-        // Which is fine, because this routine is `unsafe` anyway and the
-        // `target_feature` obligation is met by virtue of building a `Two`.
-        // The real problem is that a routine with a `target_feature`
-        // annotation generally can't be inlined into caller code unless
-        // the caller code has the same target feature annotations. Namely,
-        // the common case (at time of writing) is for calling code to not
-        // have the `avx2` target feature enabled *at compile time*. Without
-        // `target_feature` on this routine, it can be inlined which will
-        // handle some of the short-haystack cases above without touching the
-        // architecture specific code.
-        self.find_raw_avx2(start, end)
-    }
-
-    /// Like `rfind`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn rfind_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::rev_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1() || b == self.sse2.needle2()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.rfind_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `Two` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // See note in forward routine above for why we don't just call
-        // `self.avx2.rfind_raw` directly here.
-        self.rfind_raw_avx2(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Two::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Two`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn find_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.find_raw(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Two::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Two`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn rfind_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.rfind_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Two::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Two`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn find_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.find_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Two::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Two`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn rfind_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.rfind_raw(start, end)
-    }
-
-    /// Returns an iterator over all occurrences of the needle bytes in the
-    /// given haystack.
-    ///
-    /// The iterator returned implements `DoubleEndedIterator`. This means it
-    /// can also be used to find occurrences in reverse order.
-    #[inline]
-    pub fn iter<'a, 'h>(&'a self, haystack: &'h [u8]) -> TwoIter<'a, 'h> {
-        TwoIter { searcher: self, it: generic::Iter::new(haystack) }
-    }
-}
-
-/// An iterator over all occurrences of two possible bytes in a haystack.
-///
-/// This iterator implements `DoubleEndedIterator`, which means it can also be
-/// used to find occurrences in reverse order.
-///
-/// This iterator is created by the [`Two::iter`] method.
-///
-/// The lifetime parameters are as follows:
-///
-/// * `'a` refers to the lifetime of the underlying [`Two`] searcher.
-/// * `'h` refers to the lifetime of the haystack being searched.
-#[derive(Clone, Debug)]
-pub struct TwoIter<'a, 'h> {
-    searcher: &'a Two,
-    it: generic::Iter<'h>,
-}
-
-impl<'a, 'h> Iterator for TwoIter<'a, 'h> {
-    type Item = usize;
-
-    #[inline]
-    fn next(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'find_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next(|s, e| self.searcher.find_raw(s, e)) }
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        self.it.size_hint()
-    }
-}
-
-impl<'a, 'h> DoubleEndedIterator for TwoIter<'a, 'h> {
-    #[inline]
-    fn next_back(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'rfind_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next_back(|s, e| self.searcher.rfind_raw(s, e)) }
-    }
-}
-
-impl<'a, 'h> core::iter::FusedIterator for TwoIter<'a, 'h> {}
-
-/// Finds all occurrences of three bytes in a haystack.
-///
-/// That is, this reports matches of one of three possible bytes. For example,
-/// searching for `a`, `b` or `o` in `afoobar` would report matches at offsets
-/// `0`, `2`, `3`, `4` and `5`.
-#[derive(Clone, Copy, Debug)]
-pub struct Three {
-    /// Used for haystacks less than 32 bytes.
-    sse2: generic::Three<__m128i>,
-    /// Used for haystacks bigger than 32 bytes.
-    avx2: generic::Three<__m256i>,
-}
-
-impl Three {
-    /// Create a new searcher that finds occurrences of the needle bytes given.
-    ///
-    /// This particular searcher is specialized to use AVX2 vector instructions
-    /// that typically make it quite fast. (SSE2 is used for haystacks that
-    /// are too short to accommodate an AVX2 vector.)
-    ///
-    /// If either SSE2 or AVX2 is unavailable in the current environment, then
-    /// `None` is returned.
-    #[inline]
-    pub fn new(needle1: u8, needle2: u8, needle3: u8) -> Option<Three> {
-        if Three::is_available() {
-            // SAFETY: we check that sse2 and avx2 are available above.
-            unsafe { Some(Three::new_unchecked(needle1, needle2, needle3)) }
-        } else {
-            None
-        }
-    }
-
-    /// Create a new finder specific to AVX2 vectors and routines without
-    /// checking that either SSE2 or AVX2 is available.
-    ///
-    /// # Safety
-    ///
-    /// Callers must guarantee that it is safe to execute both `sse2` and
-    /// `avx2` instructions in the current environment.
-    ///
-    /// Note that it is a common misconception that if one compiles for an
-    /// `x86_64` target, then they therefore automatically have access to SSE2
-    /// instructions. While this is almost always the case, it isn't true in
-    /// 100% of cases.
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    pub unsafe fn new_unchecked(
-        needle1: u8,
-        needle2: u8,
-        needle3: u8,
-    ) -> Three {
-        Three {
-            sse2: generic::Three::new(needle1, needle2, needle3),
-            avx2: generic::Three::new(needle1, needle2, needle3),
-        }
-    }
-
-    /// Returns true when this implementation is available in the current
-    /// environment.
-    ///
-    /// When this is true, it is guaranteed that [`Three::new`] will return
-    /// a `Some` value. Similarly, when it is false, it is guaranteed that
-    /// `Three::new` will return a `None` value.
-    ///
-    /// Note also that for the lifetime of a single program, if this returns
-    /// true then it will always return true.
-    #[inline]
-    pub fn is_available() -> bool {
-        #[cfg(not(target_feature = "sse2"))]
-        {
-            false
-        }
-        #[cfg(target_feature = "sse2")]
-        {
-            #[cfg(target_feature = "avx2")]
-            {
-                true
-            }
-            #[cfg(not(target_feature = "avx2"))]
-            {
-                #[cfg(feature = "std")]
-                {
-                    std::is_x86_feature_detected!("avx2")
-                }
-                #[cfg(not(feature = "std"))]
-                {
-                    false
-                }
-            }
-        }
-    }
-
-    /// Return the first occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn find(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.find_raw(s, e)
-            })
-        }
-    }
-
-    /// Return the last occurrence of one of the needle bytes in the given
-    /// haystack. If no such occurrence exists, then `None` is returned.
-    ///
-    /// The occurrence is reported as an offset into `haystack`. Its maximum
-    /// value is `haystack.len() - 1`.
-    #[inline]
-    pub fn rfind(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: `find_raw` guarantees that if a pointer is returned, it
-        // falls within the bounds of the start and end pointers.
-        unsafe {
-            generic::search_slice_with_raw(haystack, |s, e| {
-                self.rfind_raw(s, e)
-            })
-        }
-    }
-
-    /// Like `find`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn find_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::fwd_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1()
-                        || b == self.sse2.needle2()
-                        || b == self.sse2.needle3()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.find_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `Three` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // Note that we could call `self.avx2.find_raw` directly here. But that
-        // means we'd have to annotate this routine with `target_feature`.
-        // Which is fine, because this routine is `unsafe` anyway and the
-        // `target_feature` obligation is met by virtue of building a `Three`.
-        // The real problem is that a routine with a `target_feature`
-        // annotation generally can't be inlined into caller code unless
-        // the caller code has the same target feature annotations. Namely,
-        // the common case (at time of writing) is for calling code to not
-        // have the `avx2` target feature enabled *at compile time*. Without
-        // `target_feature` on this routine, it can be inlined which will
-        // handle some of the short-haystack cases above without touching the
-        // architecture specific code.
-        self.find_raw_avx2(start, end)
-    }
-
-    /// Like `rfind`, but accepts and returns raw pointers.
-    ///
-    /// When a match is found, the pointer returned is guaranteed to be
-    /// `>= start` and `< end`.
-    ///
-    /// This routine is useful if you're already using raw pointers and would
-    /// like to avoid converting back to a slice before executing a search.
-    ///
-    /// # Safety
-    ///
-    /// * Both `start` and `end` must be valid for reads.
-    /// * Both `start` and `end` must point to an initialized value.
-    /// * Both `start` and `end` must point to the same allocated object and
-    /// must either be in bounds or at most one byte past the end of the
-    /// allocated object.
-    /// * Both `start` and `end` must be _derived from_ a pointer to the same
-    /// object.
-    /// * The distance between `start` and `end` must not overflow `isize`.
-    /// * The distance being in bounds must not rely on "wrapping around" the
-    /// address space.
-    ///
-    /// Note that callers may pass a pair of pointers such that `start >= end`.
-    /// In that case, `None` will always be returned.
-    #[inline]
-    pub unsafe fn rfind_raw(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        if start >= end {
-            return None;
-        }
-        let len = end.distance(start);
-        if len < __m256i::BYTES {
-            return if len < __m128i::BYTES {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                generic::rev_byte_by_byte(start, end, |b| {
-                    b == self.sse2.needle1()
-                        || b == self.sse2.needle2()
-                        || b == self.sse2.needle3()
-                })
-            } else {
-                // SAFETY: We require the caller to pass valid start/end
-                // pointers.
-                self.rfind_raw_sse2(start, end)
-            };
-        }
-        // SAFETY: Building a `Three` means it's safe to call both 'sse2' and
-        // 'avx2' routines. Also, we've checked that our haystack is big
-        // enough to run on the vector routine. Pointer validity is caller's
-        // responsibility.
-        //
-        // See note in forward routine above for why we don't just call
-        // `self.avx2.rfind_raw` directly here.
-        self.rfind_raw_avx2(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Three::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Three`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn find_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.find_raw(start, end)
-    }
-
-    /// Execute a search using SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Three::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an SSE2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Three`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "sse2")]
-    #[inline]
-    unsafe fn rfind_raw_sse2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.sse2.rfind_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Three::find_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Three`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn find_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.find_raw(start, end)
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as [`Three::rfind_raw`], except the distance between `start` and
-    /// `end` must be at least the size of an AVX2 vector (in bytes).
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Three`, which can only be constructed
-    /// when it is safe to call `sse2`/`avx2` routines.)
-    #[target_feature(enable = "avx2")]
-    #[inline]
-    unsafe fn rfind_raw_avx2(
-        &self,
-        start: *const u8,
-        end: *const u8,
-    ) -> Option<*const u8> {
-        self.avx2.rfind_raw(start, end)
-    }
-
-    /// Returns an iterator over all occurrences of the needle bytes in the
-    /// given haystack.
-    ///
-    /// The iterator returned implements `DoubleEndedIterator`. This means it
-    /// can also be used to find occurrences in reverse order.
-    #[inline]
-    pub fn iter<'a, 'h>(&'a self, haystack: &'h [u8]) -> ThreeIter<'a, 'h> {
-        ThreeIter { searcher: self, it: generic::Iter::new(haystack) }
-    }
-}
-
-/// An iterator over all occurrences of three possible bytes in a haystack.
-///
-/// This iterator implements `DoubleEndedIterator`, which means it can also be
-/// used to find occurrences in reverse order.
-///
-/// This iterator is created by the [`Three::iter`] method.
-///
-/// The lifetime parameters are as follows:
-///
-/// * `'a` refers to the lifetime of the underlying [`Three`] searcher.
-/// * `'h` refers to the lifetime of the haystack being searched.
-#[derive(Clone, Debug)]
-pub struct ThreeIter<'a, 'h> {
-    searcher: &'a Three,
-    it: generic::Iter<'h>,
-}
-
-impl<'a, 'h> Iterator for ThreeIter<'a, 'h> {
-    type Item = usize;
-
-    #[inline]
-    fn next(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'find_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next(|s, e| self.searcher.find_raw(s, e)) }
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        self.it.size_hint()
-    }
-}
-
-impl<'a, 'h> DoubleEndedIterator for ThreeIter<'a, 'h> {
-    #[inline]
-    fn next_back(&mut self) -> Option<usize> {
-        // SAFETY: We rely on the generic iterator to provide valid start
-        // and end pointers, but we guarantee that any pointer returned by
-        // 'rfind_raw' falls within the bounds of the start and end pointer.
-        unsafe { self.it.next_back(|s, e| self.searcher.rfind_raw(s, e)) }
-    }
-}
-
-impl<'a, 'h> core::iter::FusedIterator for ThreeIter<'a, 'h> {}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    define_memchr_quickcheck!(super);
-
-    #[test]
-    fn forward_one() {
-        crate::tests::memchr::Runner::new(1).forward_iter(
-            |haystack, needles| {
-                Some(One::new(needles[0])?.iter(haystack).collect())
-            },
-        )
-    }
-
-    #[test]
-    fn reverse_one() {
-        crate::tests::memchr::Runner::new(1).reverse_iter(
-            |haystack, needles| {
-                Some(One::new(needles[0])?.iter(haystack).rev().collect())
-            },
-        )
-    }
-
-    #[test]
-    fn count_one() {
-        crate::tests::memchr::Runner::new(1).count_iter(|haystack, needles| {
-            Some(One::new(needles[0])?.iter(haystack).count())
-        })
-    }
-
-    #[test]
-    fn forward_two() {
-        crate::tests::memchr::Runner::new(2).forward_iter(
-            |haystack, needles| {
-                let n1 = needles.get(0).copied()?;
-                let n2 = needles.get(1).copied()?;
-                Some(Two::new(n1, n2)?.iter(haystack).collect())
-            },
-        )
-    }
-
-    #[test]
-    fn reverse_two() {
-        crate::tests::memchr::Runner::new(2).reverse_iter(
-            |haystack, needles| {
-                let n1 = needles.get(0).copied()?;
-                let n2 = needles.get(1).copied()?;
-                Some(Two::new(n1, n2)?.iter(haystack).rev().collect())
-            },
-        )
-    }
-
-    #[test]
-    fn forward_three() {
-        crate::tests::memchr::Runner::new(3).forward_iter(
-            |haystack, needles| {
-                let n1 = needles.get(0).copied()?;
-                let n2 = needles.get(1).copied()?;
-                let n3 = needles.get(2).copied()?;
-                Some(Three::new(n1, n2, n3)?.iter(haystack).collect())
-            },
-        )
-    }
-
-    #[test]
-    fn reverse_three() {
-        crate::tests::memchr::Runner::new(3).reverse_iter(
-            |haystack, needles| {
-                let n1 = needles.get(0).copied()?;
-                let n2 = needles.get(1).copied()?;
-                let n3 = needles.get(2).copied()?;
-                Some(Three::new(n1, n2, n3)?.iter(haystack).rev().collect())
-            },
-        )
-    }
-}
diff --git a/vendor/memchr/src/arch/x86_64/avx2/mod.rs b/vendor/memchr/src/arch/x86_64/avx2/mod.rs
deleted file mode 100644
index ee4097d..0000000
--- a/vendor/memchr/src/arch/x86_64/avx2/mod.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-/*!
-Algorithms for the `x86_64` target using 256-bit vectors via AVX2.
-*/
-
-pub mod memchr;
-pub mod packedpair;
diff --git a/vendor/memchr/src/arch/x86_64/avx2/packedpair.rs b/vendor/memchr/src/arch/x86_64/avx2/packedpair.rs
deleted file mode 100644
index efae7b6..0000000
--- a/vendor/memchr/src/arch/x86_64/avx2/packedpair.rs
+++ /dev/null
@@ -1,272 +0,0 @@
-/*!
-A 256-bit vector implementation of the "packed pair" SIMD algorithm.
-
-The "packed pair" algorithm is based on the [generic SIMD] algorithm. The main
-difference is that it (by default) uses a background distribution of byte
-frequencies to heuristically select the pair of bytes to search for.
-
-[generic SIMD]: http://0x80.pl/articles/simd-strfind.html#first-and-last
-*/
-
-use core::arch::x86_64::{__m128i, __m256i};
-
-use crate::arch::{all::packedpair::Pair, generic::packedpair};
-
-/// A "packed pair" finder that uses 256-bit vector operations.
-///
-/// This finder picks two bytes that it believes have high predictive power
-/// for indicating an overall match of a needle. Depending on whether
-/// `Finder::find` or `Finder::find_prefilter` is used, it reports offsets
-/// where the needle matches or could match. In the prefilter case, candidates
-/// are reported whenever the [`Pair`] of bytes given matches.
-#[derive(Clone, Copy, Debug)]
-pub struct Finder {
-    sse2: packedpair::Finder<__m128i>,
-    avx2: packedpair::Finder<__m256i>,
-}
-
-impl Finder {
-    /// Create a new pair searcher. The searcher returned can either report
-    /// exact matches of `needle` or act as a prefilter and report candidate
-    /// positions of `needle`.
-    ///
-    /// If AVX2 is unavailable in the current environment or if a [`Pair`]
-    /// could not be constructed from the needle given, then `None` is
-    /// returned.
-    #[inline]
-    pub fn new(needle: &[u8]) -> Option<Finder> {
-        Finder::with_pair(needle, Pair::new(needle)?)
-    }
-
-    /// Create a new "packed pair" finder using the pair of bytes given.
-    ///
-    /// This constructor permits callers to control precisely which pair of
-    /// bytes is used as a predicate.
-    ///
-    /// If AVX2 is unavailable in the current environment, then `None` is
-    /// returned.
-    #[inline]
-    pub fn with_pair(needle: &[u8], pair: Pair) -> Option<Finder> {
-        if Finder::is_available() {
-            // SAFETY: we check that sse2/avx2 is available above. We are also
-            // guaranteed to have needle.len() > 1 because we have a valid
-            // Pair.
-            unsafe { Some(Finder::with_pair_impl(needle, pair)) }
-        } else {
-            None
-        }
-    }
-
-    /// Create a new `Finder` specific to SSE2 vectors and routines.
-    ///
-    /// # Safety
-    ///
-    /// Same as the safety for `packedpair::Finder::new`, and callers must also
-    /// ensure that both SSE2 and AVX2 are available.
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    unsafe fn with_pair_impl(needle: &[u8], pair: Pair) -> Finder {
-        let sse2 = packedpair::Finder::<__m128i>::new(needle, pair);
-        let avx2 = packedpair::Finder::<__m256i>::new(needle, pair);
-        Finder { sse2, avx2 }
-    }
-
-    /// Returns true when this implementation is available in the current
-    /// environment.
-    ///
-    /// When this is true, it is guaranteed that [`Finder::with_pair`] will
-    /// return a `Some` value. Similarly, when it is false, it is guaranteed
-    /// that `Finder::with_pair` will return a `None` value. Notice that this
-    /// does not guarantee that [`Finder::new`] will return a `Finder`. Namely,
-    /// even when `Finder::is_available` is true, it is not guaranteed that a
-    /// valid [`Pair`] can be found from the needle given.
-    ///
-    /// Note also that for the lifetime of a single program, if this returns
-    /// true then it will always return true.
-    #[inline]
-    pub fn is_available() -> bool {
-        #[cfg(not(target_feature = "sse2"))]
-        {
-            false
-        }
-        #[cfg(target_feature = "sse2")]
-        {
-            #[cfg(target_feature = "avx2")]
-            {
-                true
-            }
-            #[cfg(not(target_feature = "avx2"))]
-            {
-                #[cfg(feature = "std")]
-                {
-                    std::is_x86_feature_detected!("avx2")
-                }
-                #[cfg(not(feature = "std"))]
-                {
-                    false
-                }
-            }
-        }
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Panics
-    ///
-    /// When `haystack.len()` is less than [`Finder::min_haystack_len`].
-    #[inline]
-    pub fn find(&self, haystack: &[u8], needle: &[u8]) -> Option<usize> {
-        // SAFETY: Building a `Finder` means it's safe to call 'sse2' routines.
-        unsafe { self.find_impl(haystack, needle) }
-    }
-
-    /// Run this finder on the given haystack as a prefilter.
-    ///
-    /// If a candidate match is found, then an offset where the needle *could*
-    /// begin in the haystack is returned.
-    ///
-    /// # Panics
-    ///
-    /// When `haystack.len()` is less than [`Finder::min_haystack_len`].
-    #[inline]
-    pub fn find_prefilter(&self, haystack: &[u8]) -> Option<usize> {
-        // SAFETY: Building a `Finder` means it's safe to call 'sse2' routines.
-        unsafe { self.find_prefilter_impl(haystack) }
-    }
-
-    /// Execute a search using AVX2 vectors and routines.
-    ///
-    /// # Panics
-    ///
-    /// When `haystack.len()` is less than [`Finder::min_haystack_len`].
-    ///
-    /// # Safety
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Finder`, which can only be constructed
-    /// when it is safe to call `sse2` and `avx2` routines.)
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    unsafe fn find_impl(
-        &self,
-        haystack: &[u8],
-        needle: &[u8],
-    ) -> Option<usize> {
-        if haystack.len() < self.avx2.min_haystack_len() {
-            self.sse2.find(haystack, needle)
-        } else {
-            self.avx2.find(haystack, needle)
-        }
-    }
-
-    /// Execute a prefilter search using AVX2 vectors and routines.
-    ///
-    /// # Panics
-    ///
-    /// When `haystack.len()` is less than [`Finder::min_haystack_len`].
-    ///
-    /// # Safety
-    ///
-    /// (The target feature safety obligation is automatically fulfilled by
-    /// virtue of being a method on `Finder`, which can only be constructed
-    /// when it is safe to call `sse2` and `avx2` routines.)
-    #[target_feature(enable = "sse2", enable = "avx2")]
-    #[inline]
-    unsafe fn find_prefilter_impl(&self, haystack: &[u8]) -> Option<usize> {
-        if haystack.len() < self.avx2.min_haystack_len() {
-            self.sse2.find_prefilter(haystack)
-        } else {
-            self.avx2.find_prefilter(haystack)
-        }
-    }
-
-    /// Returns the pair of offsets (into the needle) used to check as a
-    /// predicate before confirming whether a needle exists at a particular
-    /// position.
-    #[inline]
-    pub fn pair(&self) -> &Pair {
-        self.avx2.pair()
-    }
-
-    /// Returns the minimum haystack length that this `Finder` can search.
-    ///
-    /// Using a haystack with length smaller than this in a search will result
-    /// in a panic. The reason for this restriction is that this finder is
-    /// meant to be a low-level component that is part of a larger substring
-    /// strategy. In that sense, it avoids trying to handle all cases and
-    /// instead only handles the cases that it can handle very well.
-    #[inline]
-    pub fn min_haystack_len(&self) -> usize {
-        // The caller doesn't need to care about AVX2's min_haystack_len
-        // since this implementation will automatically switch to the SSE2
-        // implementation if the haystack is too short for AVX2. Therefore, the
-        // caller only needs to care about SSE2's min_haystack_len.
-        //
-        // This does assume that SSE2's min_haystack_len is less than or
-        // equal to AVX2's min_haystack_len. In practice, this is true and
-        // there is no way it could be false based on how this Finder is
-        // implemented. Namely, both SSE2 and AVX2 use the same `Pair`. If
-        // they used different pairs, then it's possible (although perhaps
-        // pathological) for SSE2's min_haystack_len to be bigger than AVX2's.
-        self.sse2.min_haystack_len()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn find(haystack: &[u8], needle: &[u8]) -> Option<Option<usize>> {
-        let f = Finder::new(needle)?;
-        if haystack.len() < f.min_haystack_len() {
-            return None;
-        }
-        Some(f.find(haystack, needle))
-    }
-
-    define_substring_forward_quickcheck!(find);
-
-    #[test]
-    fn forward_substring() {
-        crate::tests::substring::Runner::new().fwd(find).run()
-    }
-
-    #[test]
-    fn forward_packedpair() {
-        fn find(
-            haystack: &[u8],
-            needle: &[u8],
-            index1: u8,
-            index2: u8,
-        ) -> Option<Option<usize>> {
-            let pair = Pair::with_indices(needle, index1, index2)?;
-            let f = Finder::with_pair(needle, pair)?;
-            if haystack.len() < f.min_haystack_len() {
-                return None;
-            }
-            Some(f.find(haystack, needle))
-        }
-        crate::tests::packedpair::Runner::new().fwd(find).run()
-    }
-
-    #[test]
-    fn forward_packedpair_prefilter() {
-        fn find(
-            haystack: &[u8],
-            needle: &[u8],
-            index1: u8,
-            index2: u8,
-        ) -> Option<Option<usize>> {
-            if !cfg!(target_feature = "sse2") {
-                return None;
-            }
-            let pair = Pair::with_indices(needle, index1, index2)?;
-            let f = Finder::with_pair(needle, pair)?;
-            if haystack.len() < f.min_haystack_len() {
-                return None;
-            }
-            Some(f.find_prefilter(haystack))
-        }
-        crate::tests::packedpair::Runner::new().fwd(find).run()
-    }
-}