Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

10 files changed, 1924 insertions, 0 deletions

diff --git a/vendor/simd-adler32/src/hash.rs b/vendor/simd-adler32/src/hash.rs
new file mode 100644
index 0000000..558542b
--- /dev/null
+++ b/vendor/simd-adler32/src/hash.rs
@@ -0,0 +1,156 @@
+use crate::{Adler32, Adler32Hash};
+
+impl Adler32Hash for &[u8] {
+  fn hash(&self) -> u32 {
+    let mut hash = Adler32::new();
+
+    hash.write(self);
+    hash.finish()
+  }
+}
+
+impl Adler32Hash for &str {
+  fn hash(&self) -> u32 {
+    let mut hash = Adler32::new();
+
+    hash.write(self.as_bytes());
+    hash.finish()
+  }
+}
+
+#[cfg(feature = "const-generics")]
+impl<const SIZE: usize> Adler32Hash for [u8; SIZE] {
+  fn hash(&self) -> u32 {
+    let mut hash = Adler32::new();
+
+    hash.write(self);
+    hash.finish()
+  }
+}
+
+macro_rules! array_impl {
+  ($s:expr, $($size:expr),+) => {
+    array_impl!($s);
+    $(array_impl!{$size})*
+  };
+  ($size:expr) => {
+    #[cfg(not(feature = "const-generics"))]
+    impl Adler32Hash for [u8; $size] {
+      fn hash(&self) -> u32 {
+        let mut hash = Adler32::new();
+
+        hash.write(self);
+        hash.finish()
+      }
+    }
+  };
+}
+
+array_impl!(
+  0,
+  1,
+  2,
+  3,
+  4,
+  5,
+  6,
+  7,
+  8,
+  9,
+  10,
+  11,
+  12,
+  13,
+  14,
+  15,
+  16,
+  17,
+  18,
+  19,
+  20,
+  21,
+  22,
+  23,
+  24,
+  25,
+  26,
+  27,
+  28,
+  29,
+  30,
+  31,
+  32,
+  33,
+  34,
+  35,
+  36,
+  37,
+  38,
+  39,
+  40,
+  41,
+  42,
+  43,
+  44,
+  45,
+  46,
+  47,
+  48,
+  49,
+  50,
+  51,
+  52,
+  53,
+  54,
+  55,
+  56,
+  57,
+  58,
+  59,
+  60,
+  61,
+  62,
+  63,
+  64,
+  65,
+  66,
+  67,
+  68,
+  69,
+  70,
+  71,
+  72,
+  73,
+  74,
+  75,
+  76,
+  77,
+  78,
+  79,
+  80,
+  81,
+  82,
+  83,
+  84,
+  85,
+  86,
+  87,
+  88,
+  89,
+  90,
+  91,
+  92,
+  93,
+  94,
+  95,
+  96,
+  97,
+  98,
+  99,
+  100,
+  1024,
+  1024 * 1024,
+  1024 * 1024 * 1024,
+  2048,
+  4096
+);
diff --git a/vendor/simd-adler32/src/imp/avx2.rs b/vendor/simd-adler32/src/imp/avx2.rs
new file mode 100644
index 0000000..c16cc99
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/avx2.rs
@@ -0,0 +1,214 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports avx2 instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  if std::is_x86_feature_detected!("avx2") {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(
+  target_feature = "avx2",
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(all(
+  not(target_feature = "avx2"),
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(all(
+  any(target_arch = "x86", target_arch = "x86_64"),
+  any(feature = "std", target_feature = "avx2")
+))]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 32;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "x86")]
+  use core::arch::x86::*;
+  #[cfg(target_arch = "x86_64")]
+  use core::arch::x86_64::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    unsafe { update_imp(a, b, data) }
+  }
+
+  #[inline]
+  #[target_feature(enable = "avx2")]
+  unsafe fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  #[inline]
+  unsafe fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline]
+  unsafe fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let one_v = _mm256_set1_epi16(1);
+    let zero_v = _mm256_setzero_si256();
+    let weights = get_weights();
+
+    let mut p_v = _mm256_set_epi32(0, 0, 0, 0, 0, 0, 0, (*a * blocks.len() as u32) as _);
+    let mut a_v = _mm256_setzero_si256();
+    let mut b_v = _mm256_set_epi32(0, 0, 0, 0, 0, 0, 0, *b as _);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const _;
+      let block = _mm256_loadu_si256(block_ptr);
+
+      p_v = _mm256_add_epi32(p_v, a_v);
+
+      a_v = _mm256_add_epi32(a_v, _mm256_sad_epu8(block, zero_v));
+      let mad = _mm256_maddubs_epi16(block, weights);
+      b_v = _mm256_add_epi32(b_v, _mm256_madd_epi16(mad, one_v));
+    }
+
+    b_v = _mm256_add_epi32(b_v, _mm256_slli_epi32(p_v, 5));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add(v: __m256i) -> u32 {
+    let sum = _mm_add_epi32(_mm256_castsi256_si128(v), _mm256_extracti128_si256(v, 1));
+    let hi = _mm_unpackhi_epi64(sum, sum);
+
+    let sum = _mm_add_epi32(hi, sum);
+    let hi = _mm_shuffle_epi32(sum, crate::imp::_MM_SHUFFLE(2, 3, 0, 1));
+
+    let sum = _mm_add_epi32(sum, hi);
+
+    _mm_cvtsi128_si32(sum) as _
+  }
+
+  #[inline(always)]
+  unsafe fn get_weights() -> __m256i {
+    _mm256_set_epi8(
+      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+      24, 25, 26, 27, 28, 29, 30, 31, 32,
+    )
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 1024 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 1024 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 1024 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..1024 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/avx512.rs b/vendor/simd-adler32/src/imp/avx512.rs
new file mode 100644
index 0000000..ebb32fa
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/avx512.rs
@@ -0,0 +1,242 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports avx512f and avx512bw instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(all(
+  feature = "std",
+  feature = "nightly",
+  any(target_arch = "x86", target_arch = "x86_64")
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  let has_avx512f = std::is_x86_feature_detected!("avx512f");
+  let has_avx512bw = std::is_x86_feature_detected!("avx512bw");
+
+  if has_avx512f && has_avx512bw {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(
+  feature = "nightly",
+  all(target_feature = "avx512f", target_feature = "avx512bw"),
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(all(
+  not(all(feature = "nightly", target_feature = "avx512f", target_feature = "avx512bw")),
+  not(all(
+    feature = "std",
+    feature = "nightly",
+    any(target_arch = "x86", target_arch = "x86_64")
+  ))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(all(
+  feature = "nightly",
+  any(target_arch = "x86", target_arch = "x86_64"),
+  any(
+    feature = "std",
+    all(target_feature = "avx512f", target_feature = "avx512bw")
+  )
+))]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 64;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "x86")]
+  use core::arch::x86::*;
+  #[cfg(target_arch = "x86_64")]
+  use core::arch::x86_64::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    unsafe { update_imp(a, b, data) }
+  }
+
+  #[inline]
+  #[target_feature(enable = "avx512f")]
+  #[target_feature(enable = "avx512bw")]
+  unsafe fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  #[inline]
+  unsafe fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline]
+  unsafe fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let one_v = _mm512_set1_epi16(1);
+    let zero_v = _mm512_setzero_si512();
+    let weights = get_weights();
+
+    let p_v = (*a * blocks.len() as u32) as _;
+    let mut p_v = _mm512_set_epi32(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, p_v);
+    let mut a_v = _mm512_setzero_si512();
+    let mut b_v = _mm512_set_epi32(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, *b as _);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const _;
+      let block = _mm512_loadu_si512(block_ptr);
+
+      p_v = _mm512_add_epi32(p_v, a_v);
+
+      a_v = _mm512_add_epi32(a_v, _mm512_sad_epu8(block, zero_v));
+      let mad = _mm512_maddubs_epi16(block, weights);
+      b_v = _mm512_add_epi32(b_v, _mm512_madd_epi16(mad, one_v));
+    }
+
+    b_v = _mm512_add_epi32(b_v, _mm512_slli_epi32(p_v, 6));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add(v: __m512i) -> u32 {
+    let v: [__m256i; 2] = core::mem::transmute(v);
+
+    reduce_add_256(v[0]) + reduce_add_256(v[1])
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_256(v: __m256i) -> u32 {
+    let v: [__m128i; 2] = core::mem::transmute(v);
+    let sum = _mm_add_epi32(v[0], v[1]);
+    let hi = _mm_unpackhi_epi64(sum, sum);
+
+    let sum = _mm_add_epi32(hi, sum);
+    let hi = _mm_shuffle_epi32(sum, crate::imp::_MM_SHUFFLE(2, 3, 0, 1));
+
+    let sum = _mm_add_epi32(sum, hi);
+    let sum = _mm_cvtsi128_si32(sum) as _;
+
+    sum
+  }
+
+  #[inline(always)]
+  unsafe fn get_weights() -> __m512i {
+    _mm512_set_epi8(
+      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+      24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
+      45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+    )
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 1024 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 1024 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 1024 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..1024 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/mod.rs b/vendor/simd-adler32/src/imp/mod.rs
new file mode 100644
index 0000000..957b50a
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/mod.rs
@@ -0,0 +1,23 @@
+pub mod avx2;
+pub mod avx512;
+pub mod scalar;
+pub mod sse2;
+pub mod ssse3;
+pub mod wasm;
+
+pub type Adler32Imp = fn(u16, u16, &[u8]) -> (u16, u16);
+
+#[inline]
+#[allow(non_snake_case)]
+pub const fn _MM_SHUFFLE(z: u32, y: u32, x: u32, w: u32) -> i32 {
+  ((z << 6) | (y << 4) | (x << 2) | w) as i32
+}
+
+pub fn get_imp() -> Adler32Imp {
+  avx512::get_imp()
+    .or_else(avx2::get_imp)
+    .or_else(ssse3::get_imp)
+    .or_else(sse2::get_imp)
+    .or_else(wasm::get_imp)
+    .unwrap_or(scalar::update)
+}
diff --git a/vendor/simd-adler32/src/imp/neon.rs b/vendor/simd-adler32/src/imp/neon.rs
new file mode 100644
index 0000000..8398b6d
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/neon.rs
@@ -0,0 +1,241 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports avx512f and avx512bw instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(all(feature = "std", feature = "nightly", target_arch = "arm"))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  if std::is_arm_feature_detected("neon") {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(feature = "std", feature = "nightly", target_arch = "aarch64"))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  if std::is_aarch64_feature_detected("neon") {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(
+  feature = "nightly",
+  target_feature = "neon",
+  not(all(feature = "std", any(target_arch = "arm", target_arch = "aarch64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(all(
+  not(target_feature = "neon"),
+  not(all(
+    feature = "std",
+    feature = "nightly",
+    any(target_arch = "arm", target_arch = "aarch64")
+  ))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(all(
+  feature = "nightly",
+  any(target_arch = "arm", target_arch = "aarch64"),
+  any(feature = "std", target_feature = "neon")
+))]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 64;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "aarch64")]
+  use core::arch::aarch64::*;
+  #[cfg(target_arch = "arm")]
+  use core::arch::arm::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    unsafe { update_imp(a, b, data) }
+  }
+
+  #[inline]
+  #[target_feature(enable = "neon")]
+  unsafe fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  #[inline]
+  unsafe fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline]
+  unsafe fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let one_v = _mm512_set1_epi16(1);
+    let zero_v = _mm512_setzero_si512();
+    let weights = get_weights();
+
+    let p_v = (*a * blocks.len() as u32) as _;
+    let mut p_v = _mm512_set_epi32(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, p_v);
+    let mut a_v = _mm512_setzero_si512();
+    let mut b_v = _mm512_set_epi32(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, *b as _);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const _;
+      let block = _mm512_loadu_si512(block_ptr);
+
+      p_v = _mm512_add_epi32(p_v, a_v);
+
+      a_v = _mm512_add_epi32(a_v, _mm512_sad_epu8(block, zero_v));
+      let mad = _mm512_maddubs_epi16(block, weights);
+      b_v = _mm512_add_epi32(b_v, _mm512_madd_epi16(mad, one_v));
+    }
+
+    b_v = _mm512_add_epi32(b_v, _mm512_slli_epi32(p_v, 6));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add(v: __m512i) -> u32 {
+    let v: [__m256i; 2] = core::mem::transmute(v);
+
+    reduce_add_256(v[0]) + reduce_add_256(v[1])
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_256(v: __m256i) -> u32 {
+    let v: [__m128i; 2] = core::mem::transmute(v);
+    let sum = _mm_add_epi32(v[0], v[1]);
+    let hi = _mm_unpackhi_epi64(sum, sum);
+
+    let sum = _mm_add_epi32(hi, sum);
+    let hi = _mm_shuffle_epi32(sum, crate::imp::_MM_SHUFFLE(2, 3, 0, 1));
+
+    let sum = _mm_add_epi32(sum, hi);
+    let sum = _mm_cvtsi128_si32(sum) as _;
+
+    sum
+  }
+
+  #[inline(always)]
+  unsafe fn get_weights() -> __m512i {
+    _mm512_set_epi8(
+      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+      24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
+      45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+    )
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 1024 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 1024 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 1024 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..1024 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/scalar.rs b/vendor/simd-adler32/src/imp/scalar.rs
new file mode 100644
index 0000000..558813e
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/scalar.rs
@@ -0,0 +1,69 @@
+const MOD: u32 = 65521;
+const NMAX: usize = 5552;
+
+pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+  let mut a = a as u32;
+  let mut b = b as u32;
+
+  let chunks = data.chunks_exact(NMAX);
+  let remainder = chunks.remainder();
+
+  for chunk in chunks {
+    for byte in chunk {
+      a = a.wrapping_add(*byte as _);
+      b = b.wrapping_add(a);
+    }
+
+    a %= MOD;
+    b %= MOD;
+  }
+
+  for byte in remainder {
+    a = a.wrapping_add(*byte as _);
+    b = b.wrapping_add(a);
+  }
+
+  a %= MOD;
+  b %= MOD;
+
+  (a as u16, b as u16)
+}
+
+#[cfg(test)]
+mod tests {
+  #[test]
+  fn zeroes() {
+    assert_eq!(adler32(&[]), 1);
+    assert_eq!(adler32(&[0]), 1 | 1 << 16);
+    assert_eq!(adler32(&[0, 0]), 1 | 2 << 16);
+    assert_eq!(adler32(&[0; 100]), 0x00640001);
+    assert_eq!(adler32(&[0; 1024]), 0x04000001);
+    assert_eq!(adler32(&[0; 1024 * 1024]), 0x00f00001);
+  }
+
+  #[test]
+  fn ones() {
+    assert_eq!(adler32(&[0xff; 1024]), 0x79a6fc2e);
+    assert_eq!(adler32(&[0xff; 1024 * 1024]), 0x8e88ef11);
+  }
+
+  #[test]
+  fn mixed() {
+    assert_eq!(adler32(&[1]), 2 | 2 << 16);
+    assert_eq!(adler32(&[40]), 41 | 41 << 16);
+
+    assert_eq!(adler32(&[0xA5; 1024 * 1024]), 0xd5009ab1);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_eq!(adler32(b"Wikipedia"), 0x11E60398);
+  }
+
+  fn adler32(data: &[u8]) -> u32 {
+    let (a, b) = super::update(1, 0, data);
+
+    u32::from(b) << 16 | u32::from(a)
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/sse2.rs b/vendor/simd-adler32/src/imp/sse2.rs
new file mode 100644
index 0000000..b76df52
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/sse2.rs
@@ -0,0 +1,233 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports sse2 instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  if std::is_x86_feature_detected!("sse2") {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(
+  target_feature = "sse2",
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(all(
+  not(target_feature = "sse2"),
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(all(
+  any(target_arch = "x86", target_arch = "x86_64"),
+  any(feature = "std", target_feature = "sse2")
+))]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 32;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "x86")]
+  use core::arch::x86::*;
+  #[cfg(target_arch = "x86_64")]
+  use core::arch::x86_64::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    unsafe { update_imp(a, b, data) }
+  }
+
+  #[inline]
+  #[target_feature(enable = "sse2")]
+  unsafe fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  unsafe fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  unsafe fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let zero_v = _mm_setzero_si128();
+    let weight_hi_v = get_weight_hi();
+    let weight_lo_v = get_weight_lo();
+
+    let mut p_v = _mm_set_epi32(0, 0, 0, (*a * blocks.len() as u32) as _);
+    let mut a_v = _mm_setzero_si128();
+    let mut b_v = _mm_set_epi32(0, 0, 0, *b as _);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const _;
+      let left_v = _mm_loadu_si128(block_ptr);
+      let right_v = _mm_loadu_si128(block_ptr.add(1));
+
+      p_v = _mm_add_epi32(p_v, a_v);
+
+      a_v = _mm_add_epi32(a_v, _mm_sad_epu8(left_v, zero_v));
+      let mad = maddubs(left_v, weight_hi_v);
+      b_v = _mm_add_epi32(b_v, mad);
+
+      a_v = _mm_add_epi32(a_v, _mm_sad_epu8(right_v, zero_v));
+      let mad = maddubs(right_v, weight_lo_v);
+      b_v = _mm_add_epi32(b_v, mad);
+    }
+
+    b_v = _mm_add_epi32(b_v, _mm_slli_epi32(p_v, 5));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  unsafe fn maddubs(a: __m128i, b: __m128i) -> __m128i {
+    let a_lo = _mm_unpacklo_epi8(a, _mm_setzero_si128());
+    let a_hi = _mm_unpackhi_epi8(a, _mm_setzero_si128());
+
+    let b_lo = _mm_unpacklo_epi8(b, _mm_setzero_si128());
+    let b_hi = _mm_unpackhi_epi8(b, _mm_setzero_si128());
+
+    let lo = _mm_madd_epi16(a_lo, b_lo);
+    let hi = _mm_madd_epi16(a_hi, b_hi);
+
+    _mm_add_epi32(lo, hi)
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add(v: __m128i) -> u32 {
+    let hi = _mm_unpackhi_epi64(v, v);
+    let sum = _mm_add_epi32(hi, v);
+    let hi = _mm_shuffle_epi32(sum, crate::imp::_MM_SHUFFLE(2, 3, 0, 1));
+
+    let sum = _mm_add_epi32(sum, hi);
+
+    _mm_cvtsi128_si32(sum) as _
+  }
+
+  #[inline(always)]
+  unsafe fn get_weight_lo() -> __m128i {
+    _mm_set_epi8(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
+  }
+
+  #[inline(always)]
+  unsafe fn get_weight_hi() -> __m128i {
+    _mm_set_epi8(
+      17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+    )
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 1024 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 1024 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 1024 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..1024 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/ssse3.rs b/vendor/simd-adler32/src/imp/ssse3.rs
new file mode 100644
index 0000000..2602d47
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/ssse3.rs
@@ -0,0 +1,219 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports ssse3 instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  if std::is_x86_feature_detected!("ssse3") {
+    Some(imp::update)
+  } else {
+    None
+  }
+}
+
+#[inline]
+#[cfg(all(
+  target_feature = "ssse3",
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(all(
+  not(target_feature = "ssse3"),
+  not(all(feature = "std", any(target_arch = "x86", target_arch = "x86_64")))
+))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(all(
+  any(target_arch = "x86", target_arch = "x86_64"),
+  any(feature = "std", target_feature = "ssse3")
+))]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 32;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "x86")]
+  use core::arch::x86::*;
+  #[cfg(target_arch = "x86_64")]
+  use core::arch::x86_64::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    unsafe { update_imp(a, b, data) }
+  }
+
+  #[inline]
+  #[target_feature(enable = "ssse3")]
+  unsafe fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  unsafe fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  unsafe fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let one_v = _mm_set1_epi16(1);
+    let zero_v = _mm_set1_epi16(0);
+    let weight_hi_v = get_weight_hi();
+    let weight_lo_v = get_weight_lo();
+
+    let mut p_v = _mm_set_epi32(0, 0, 0, (*a * blocks.len() as u32) as _);
+    let mut a_v = _mm_set_epi32(0, 0, 0, 0);
+    let mut b_v = _mm_set_epi32(0, 0, 0, *b as _);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const _;
+      let left_v = _mm_loadu_si128(block_ptr);
+      let right_v = _mm_loadu_si128(block_ptr.add(1));
+
+      p_v = _mm_add_epi32(p_v, a_v);
+
+      a_v = _mm_add_epi32(a_v, _mm_sad_epu8(left_v, zero_v));
+      let mad = _mm_maddubs_epi16(left_v, weight_hi_v);
+      b_v = _mm_add_epi32(b_v, _mm_madd_epi16(mad, one_v));
+
+      a_v = _mm_add_epi32(a_v, _mm_sad_epu8(right_v, zero_v));
+      let mad = _mm_maddubs_epi16(right_v, weight_lo_v);
+      b_v = _mm_add_epi32(b_v, _mm_madd_epi16(mad, one_v));
+    }
+
+    b_v = _mm_add_epi32(b_v, _mm_slli_epi32(p_v, 5));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  unsafe fn reduce_add(v: __m128i) -> u32 {
+    let hi = _mm_unpackhi_epi64(v, v);
+    let sum = _mm_add_epi32(hi, v);
+    let hi = _mm_shuffle_epi32(sum, crate::imp::_MM_SHUFFLE(2, 3, 0, 1));
+    let sum = _mm_add_epi32(sum, hi);
+
+    _mm_cvtsi128_si32(sum) as _
+  }
+
+  #[inline(always)]
+  unsafe fn get_weight_lo() -> __m128i {
+    _mm_set_epi8(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
+  }
+
+  #[inline(always)]
+  unsafe fn get_weight_hi() -> __m128i {
+    _mm_set_epi8(
+      17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+    )
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 1024 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 1024 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 1024 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..1024 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/imp/wasm.rs b/vendor/simd-adler32/src/imp/wasm.rs
new file mode 100644
index 0000000..5a9152b
--- /dev/null
+++ b/vendor/simd-adler32/src/imp/wasm.rs
@@ -0,0 +1,217 @@
+use super::Adler32Imp;
+
+/// Resolves update implementation if CPU supports simd128 instructions.
+pub fn get_imp() -> Option<Adler32Imp> {
+  get_imp_inner()
+}
+
+#[inline]
+#[cfg(target_feature = "simd128")]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  Some(imp::update)
+}
+
+#[inline]
+#[cfg(not(target_feature = "simd128"))]
+fn get_imp_inner() -> Option<Adler32Imp> {
+  None
+}
+
+#[cfg(target_feature = "simd128")]
+mod imp {
+  const MOD: u32 = 65521;
+  const NMAX: usize = 5552;
+  const BLOCK_SIZE: usize = 32;
+  const CHUNK_SIZE: usize = NMAX / BLOCK_SIZE * BLOCK_SIZE;
+
+  #[cfg(target_arch = "wasm32")]
+  use core::arch::wasm32::*;
+  #[cfg(target_arch = "wasm64")]
+  use core::arch::wasm64::*;
+
+  pub fn update(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    update_imp(a, b, data)
+  }
+
+  #[inline]
+  #[target_feature(enable = "simd128")]
+  fn update_imp(a: u16, b: u16, data: &[u8]) -> (u16, u16) {
+    let mut a = a as u32;
+    let mut b = b as u32;
+
+    let chunks = data.chunks_exact(CHUNK_SIZE);
+    let remainder = chunks.remainder();
+    for chunk in chunks {
+      update_chunk_block(&mut a, &mut b, chunk);
+    }
+
+    update_block(&mut a, &mut b, remainder);
+
+    (a as u16, b as u16)
+  }
+
+  fn update_chunk_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert_eq!(
+      chunk.len(),
+      CHUNK_SIZE,
+      "Unexpected chunk size (expected {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    reduce_add_blocks(a, b, chunk);
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  fn update_block(a: &mut u32, b: &mut u32, chunk: &[u8]) {
+    debug_assert!(
+      chunk.len() <= CHUNK_SIZE,
+      "Unexpected chunk size (expected <= {}, got {})",
+      CHUNK_SIZE,
+      chunk.len()
+    );
+
+    for byte in reduce_add_blocks(a, b, chunk) {
+      *a += *byte as u32;
+      *b += *a;
+    }
+
+    *a %= MOD;
+    *b %= MOD;
+  }
+
+  #[inline(always)]
+  fn reduce_add_blocks<'a>(a: &mut u32, b: &mut u32, chunk: &'a [u8]) -> &'a [u8] {
+    if chunk.len() < BLOCK_SIZE {
+      return chunk;
+    }
+
+    let blocks = chunk.chunks_exact(BLOCK_SIZE);
+    let blocks_remainder = blocks.remainder();
+
+    let weight_hi_v = get_weight_hi();
+    let weight_lo_v = get_weight_lo();
+
+    let mut p_v = u32x4(*a * blocks.len() as u32, 0, 0, 0);
+    let mut a_v = u32x4(0, 0, 0, 0);
+    let mut b_v = u32x4(*b, 0, 0, 0);
+
+    for block in blocks {
+      let block_ptr = block.as_ptr() as *const v128;
+      let v_lo = unsafe { block_ptr.read_unaligned() };
+      let v_hi = unsafe { block_ptr.add(1).read_unaligned() };
+
+      p_v = u32x4_add(p_v, a_v);
+
+      a_v = u32x4_add(a_v, u32x4_extadd_quarters_u8x16(v_lo));
+      let mad = i32x4_dot_i8x16(v_lo, weight_lo_v);
+      b_v = u32x4_add(b_v, mad);
+
+      a_v = u32x4_add(a_v, u32x4_extadd_quarters_u8x16(v_hi));
+      let mad = i32x4_dot_i8x16(v_hi, weight_hi_v);
+      b_v = u32x4_add(b_v, mad);
+    }
+
+    b_v = u32x4_add(b_v, u32x4_shl(p_v, 5));
+
+    *a += reduce_add(a_v);
+    *b = reduce_add(b_v);
+
+    blocks_remainder
+  }
+
+  #[inline(always)]
+  fn i32x4_dot_i8x16(a: v128, b: v128) -> v128 {
+    let a_lo = u16x8_extend_low_u8x16(a);
+    let a_hi = u16x8_extend_high_u8x16(a);
+
+    let b_lo = u16x8_extend_low_u8x16(b);
+    let b_hi = u16x8_extend_high_u8x16(b);
+
+    let lo = i32x4_dot_i16x8(a_lo, b_lo);
+    let hi = i32x4_dot_i16x8(a_hi, b_hi);
+
+    i32x4_add(lo, hi)
+  }
+
+  #[inline(always)]
+  fn u32x4_extadd_quarters_u8x16(a: v128) -> v128 {
+    u32x4_extadd_pairwise_u16x8(u16x8_extadd_pairwise_u8x16(a))
+  }
+
+  #[inline(always)]
+  fn reduce_add(v: v128) -> u32 {
+    let arr: [u32; 4] = unsafe { std::mem::transmute(v) };
+    let mut sum = 0u32;
+    for val in arr {
+      sum = sum.wrapping_add(val);
+    }
+    sum
+  }
+
+  #[inline(always)]
+  fn get_weight_lo() -> v128 {
+    u8x16(
+      32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17,
+    )
+  }
+
+  #[inline(always)]
+  fn get_weight_hi() -> v128 {
+    u8x16(16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use rand::Rng;
+
+  #[test]
+  fn zeroes() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[0]);
+    assert_sum_eq(&[0, 0]);
+    assert_sum_eq(&[0; 100]);
+    assert_sum_eq(&[0; 1024]);
+    assert_sum_eq(&[0; 512 * 1024]);
+  }
+
+  #[test]
+  fn ones() {
+    assert_sum_eq(&[]);
+    assert_sum_eq(&[1]);
+    assert_sum_eq(&[1, 1]);
+    assert_sum_eq(&[1; 100]);
+    assert_sum_eq(&[1; 1024]);
+    assert_sum_eq(&[1; 512 * 1024]);
+  }
+
+  #[test]
+  fn random() {
+    let mut random = [0; 512 * 1024];
+    rand::thread_rng().fill(&mut random[..]);
+
+    assert_sum_eq(&random[..1]);
+    assert_sum_eq(&random[..100]);
+    assert_sum_eq(&random[..1024]);
+    assert_sum_eq(&random[..512 * 1024]);
+  }
+
+  /// Example calculation from https://en.wikipedia.org/wiki/Adler-32.
+  #[test]
+  fn wiki() {
+    assert_sum_eq(b"Wikipedia");
+  }
+
+  fn assert_sum_eq(data: &[u8]) {
+    if let Some(update) = super::get_imp() {
+      let (a, b) = update(1, 0, data);
+      let left = u32::from(b) << 16 | u32::from(a);
+      let right = adler::adler32_slice(data);
+
+      assert_eq!(left, right, "len({})", data.len());
+    }
+  }
+}
diff --git a/vendor/simd-adler32/src/lib.rs b/vendor/simd-adler32/src/lib.rs
new file mode 100644
index 0000000..e61dddd
--- /dev/null
+++ b/vendor/simd-adler32/src/lib.rs
@@ -0,0 +1,310 @@
+//! # simd-adler32
+//!
+//! A SIMD-accelerated Adler-32 hash algorithm implementation.
+//!
+//! ## Features
+//!
+//! - No dependencies
+//! - Support `no_std` (with `default-features = false`)
+//! - Runtime CPU feature detection (when `std` enabled)
+//! - Blazing fast performance on as many targets as possible (currently only x86 and x86_64)
+//! - Default to scalar implementation when simd not available
+//!
+//! ## Quick start
+//!
+//! > Cargo.toml
+//!
+//! ```toml
+//! [dependencies]
+//! simd-adler32 = "*"
+//! ```
+//!
+//! > example.rs
+//!
+//! ```rust
+//! use simd_adler32::Adler32;
+//!
+//! let mut adler = Adler32::new();
+//! adler.write(b"rust is pretty cool, man");
+//! let hash = adler.finish();
+//!
+//! println!("{}", hash);
+//! // 1921255656
+//! ```
+//!
+//! ## Feature flags
+//!
+//! * `std` - Enabled by default
+//!
+//! Enables std support, see [CPU Feature Detection](#cpu-feature-detection) for runtime
+//! detection support.
+//! * `nightly`
+//!
+//! Enables nightly features required for avx512 support.
+//!
+//! * `const-generics` - Enabled by default
+//!
+//! Enables const-generics support allowing for user-defined array hashing by value.  See
+//! [`Adler32Hash`] for details.
+//!
+//! ## Support
+//!
+//! **CPU Features**
+//!
+//! | impl | arch             | feature |
+//! | ---- | ---------------- | ------- |
+//! | ✅   | `x86`, `x86_64`  | avx512  |
+//! | ✅   | `x86`, `x86_64`  | avx2    |
+//! | ✅   | `x86`, `x86_64`  | ssse3   |
+//! | ✅   | `x86`, `x86_64`  | sse2    |
+//! | 🚧   | `arm`, `aarch64` | neon    |
+//! |      | `wasm32`         | simd128 |
+//!
+//! **MSRV** `1.36.0`\*\*
+//!
+//! Minimum supported rust version is tested before a new version is published. [**] Feature
+//! `const-generics` needs to disabled to build on rustc versions `<1.51` which can be done
+//! by updating your dependency definition to the following.
+//!
+//! ## CPU Feature Detection
+//! simd-adler32 supports both runtime and compile time CPU feature detection using the
+//! `std::is_x86_feature_detected` macro when the `Adler32` struct is instantiated with
+//! the `new` fn.  
+//!
+//! Without `std` feature enabled simd-adler32 falls back to compile time feature detection
+//! using `target-feature` or `target-cpu` flags supplied to rustc. See [https://rust-lang.github.io/packed_simd/perf-guide/target-feature/rustflags.html](https://rust-lang.github.io/packed_simd/perf-guide/target-feature/rustflags.html)
+//! for more information.
+//!
+//! Feature detection tries to use the fastest supported feature first.
+#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(feature = "nightly", feature(stdsimd, avx512_target_feature))]
+
+#[doc(hidden)]
+pub mod hash;
+#[doc(hidden)]
+pub mod imp;
+
+pub use hash::*;
+use imp::{get_imp, Adler32Imp};
+
+/// An adler32 hash generator type.
+#[derive(Clone)]
+pub struct Adler32 {
+  a: u16,
+  b: u16,
+  update: Adler32Imp,
+}
+
+impl Adler32 {
+  /// Constructs a new `Adler32`.
+  ///
+  /// Potential overhead here due to runtime feature detection although in testing on 100k
+  /// and 10k random byte arrays it was not really noticeable.
+  ///
+  /// # Examples
+  /// ```rust
+  /// use simd_adler32::Adler32;
+  ///
+  /// let mut adler = Adler32::new();
+  /// ```
+  pub fn new() -> Self {
+    Default::default()
+  }
+
+  /// Constructs a new `Adler32` using existing checksum.
+  ///
+  /// Potential overhead here due to runtime feature detection although in testing on 100k
+  /// and 10k random byte arrays it was not really noticeable.
+  ///
+  /// # Examples
+  /// ```rust
+  /// use simd_adler32::Adler32;
+  ///
+  /// let mut adler = Adler32::from_checksum(0xdeadbeaf);
+  /// ```
+  pub fn from_checksum(checksum: u32) -> Self {
+    Self {
+      a: checksum as u16,
+      b: (checksum >> 16) as u16,
+      update: get_imp(),
+    }
+  }
+
+  /// Computes hash for supplied data and stores results in internal state.
+  pub fn write(&mut self, data: &[u8]) {
+    let (a, b) = (self.update)(self.a, self.b, data);
+
+    self.a = a;
+    self.b = b;
+  }
+
+  /// Returns the hash value for the values written so far.
+  ///
+  /// Despite its name, the method does not reset the hasher’s internal state. Additional
+  /// writes will continue from the current value. If you need to start a fresh hash
+  /// value, you will have to use `reset`.
+  pub fn finish(&self) -> u32 {
+    (u32::from(self.b) << 16) | u32::from(self.a)
+  }
+
+  /// Resets the internal state.
+  pub fn reset(&mut self) {
+    self.a = 1;
+    self.b = 0;
+  }
+}
+
+/// Compute Adler-32 hash on `Adler32Hash` type.
+///
+/// # Arguments
+/// * `hash` - A Adler-32 hash-able type.
+///
+/// # Examples
+/// ```rust
+/// use simd_adler32::adler32;
+///
+/// let hash = adler32(b"Adler-32");
+/// println!("{}", hash); // 800813569
+/// ```
+pub fn adler32<H: Adler32Hash>(hash: &H) -> u32 {
+  hash.hash()
+}
+
+/// A Adler-32 hash-able type.
+pub trait Adler32Hash {
+  /// Feeds this value into `Adler32`.
+  fn hash(&self) -> u32;
+}
+
+impl Default for Adler32 {
+  fn default() -> Self {
+    Self {
+      a: 1,
+      b: 0,
+      update: get_imp(),
+    }
+  }
+}
+
+#[cfg(feature = "std")]
+pub mod read {
+  //! Reader-based hashing.
+  //!
+  //! # Example
+  //! ```rust
+  //! use std::io::Cursor;
+  //! use simd_adler32::read::adler32;
+  //!
+  //! let mut reader = Cursor::new(b"Hello there");
+  //! let hash = adler32(&mut reader).unwrap();
+  //!
+  //! println!("{}", hash) // 800813569
+  //! ```
+  use crate::Adler32;
+  use std::io::{Read, Result};
+
+  /// Compute Adler-32 hash on reader until EOF.
+  ///
+  /// # Example
+  /// ```rust
+  /// use std::io::Cursor;
+  /// use simd_adler32::read::adler32;
+  ///
+  /// let mut reader = Cursor::new(b"Hello there");
+  /// let hash = adler32(&mut reader).unwrap();
+  ///
+  /// println!("{}", hash) // 800813569
+  /// ```
+  pub fn adler32<R: Read>(reader: &mut R) -> Result<u32> {
+    let mut hash = Adler32::new();
+    let mut buf = [0; 4096];
+
+    loop {
+      match reader.read(&mut buf) {
+        Ok(0) => return Ok(hash.finish()),
+        Ok(n) => {
+          hash.write(&buf[..n]);
+        }
+        Err(err) => return Err(err),
+      }
+    }
+  }
+}
+
+#[cfg(feature = "std")]
+pub mod bufread {
+  //! BufRead-based hashing.
+  //!
+  //! Separate `BufRead` trait implemented to allow for custom buffer size optimization.
+  //!
+  //! # Example
+  //! ```rust
+  //! use std::io::{Cursor, BufReader};
+  //! use simd_adler32::bufread::adler32;
+  //!
+  //! let mut reader = Cursor::new(b"Hello there");
+  //! let mut reader = BufReader::new(reader);
+  //! let hash = adler32(&mut reader).unwrap();
+  //!
+  //! println!("{}", hash) // 800813569
+  //! ```
+  use crate::Adler32;
+  use std::io::{BufRead, ErrorKind, Result};
+
+  /// Compute Adler-32 hash on buf reader until EOF.
+  ///
+  /// # Example
+  /// ```rust
+  /// use std::io::{Cursor, BufReader};
+  /// use simd_adler32::bufread::adler32;
+  ///
+  /// let mut reader = Cursor::new(b"Hello there");
+  /// let mut reader = BufReader::new(reader);
+  /// let hash = adler32(&mut reader).unwrap();
+  ///
+  /// println!("{}", hash) // 800813569
+  /// ```
+  pub fn adler32<R: BufRead>(reader: &mut R) -> Result<u32> {
+    let mut hash = Adler32::new();
+
+    loop {
+      let consumed = match reader.fill_buf() {
+        Ok(buf) => {
+          if buf.is_empty() {
+            return Ok(hash.finish());
+          }
+
+          hash.write(buf);
+          buf.len()
+        }
+        Err(err) => match err.kind() {
+          ErrorKind::Interrupted => continue,
+          ErrorKind::UnexpectedEof => return Ok(hash.finish()),
+          _ => return Err(err),
+        },
+      };
+
+      reader.consume(consumed);
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  #[test]
+  fn test_from_checksum() {
+    let buf = b"rust is pretty cool man";
+    let sum = 0xdeadbeaf;
+
+    let mut simd = super::Adler32::from_checksum(sum);
+    let mut adler = adler::Adler32::from_checksum(sum);
+
+    simd.write(buf);
+    adler.write_slice(buf);
+
+    let simd = simd.finish();
+    let scalar = adler.checksum();
+
+    assert_eq!(simd, scalar);
+  }
+}