From 183eae7be067f3f84887a0d63da5a815808c290b Mon Sep 17 00:00:00 2001
From: Mike Hommey <mh+mozilla@glandium.org>
Date: Tue, 15 Jun 2021 22:17:27 +0000
Subject: [PATCH] Bug 1716518 - Upgrade ppv-lite86 to v0.2.10. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D117836
---
 Cargo.lock                                    |   4 +-
 .../rust/ppv-lite86/.cargo-checksum.json      |   2 +-
 third_party/rust/ppv-lite86/Cargo.toml        |   5 +-
 third_party/rust/ppv-lite86/src/generic.rs    |  69 +++-
 third_party/rust/ppv-lite86/src/lib.rs        |   8 +-
 third_party/rust/ppv-lite86/src/soft.rs       |  11 +-
 third_party/rust/ppv-lite86/src/types.rs      | 337 +++++++++---------
 third_party/rust/ppv-lite86/src/x86_64/mod.rs |  23 +-
 .../rust/ppv-lite86/src/x86_64/sse2.rs        | 122 +++----
 9 files changed, 324 insertions(+), 257 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 6e499fdf4a05..787471187885 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3902,9 +3902,9 @@ checksum = "b18befed8bc2b61abc79a457295e7e838417326da1586050b919414073977f19"
 
 [[package]]
 name = "ppv-lite86"
-version = "0.2.6"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 
 [[package]]
 name = "precomputed-hash"
diff --git a/third_party/rust/ppv-lite86/.cargo-checksum.json b/third_party/rust/ppv-lite86/.cargo-checksum.json
index 784cd4e54d6b..b4ea624071ad 100644
--- a/third_party/rust/ppv-lite86/.cargo-checksum.json
+++ b/third_party/rust/ppv-lite86/.cargo-checksum.json
@@ -1 +1 @@
-{"files":{"Cargo.toml":"3cf6fa0e4089c12be1d19ac9082aabed68d3f193dbd5024379c22a8a4db15abe","LICENSE-APACHE":"0218327e7a480793ffdd4eb792379a9709e5c135c7ba267f709d6f6d4d70af0a","LICENSE-MIT":"4cada0bd02ea3692eee6f16400d86c6508bbd3bafb2b65fed0419f36d4f83e8f","src/generic.rs":"6c19b3062aec77a92130be1ce55c90aeca0811bcb19951c25a50c8fbe89a26d0","src/lib.rs":"75beb27d89dcc7541c8e81ad1f4bec81908d8d5fa0e3adec47cb1a1f008dfd32","src/soft.rs":"6fb8aa428183ec09d63d45761507d8da6dffc45990f2d1fcfd387c4c856599cc","src/types.rs":"4890069359ed53575a6b9a8168037ccdd4b029c8d61d540e9770fe3c90359345","src/x86_64/mod.rs":"e95910e8c9d23c212055598a437bfcdfaebf4f12e03a04e75f961bc3e9e257a1","src/x86_64/sse2.rs":"da72424e9e3fabd6236d4de80edb1448dc0bac02797df8e15298d412cdaef10c"},"package":"74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"}
\ No newline at end of file
+{"files":{"Cargo.toml":"5d9b7092f252e3a6f7f50f6aeb1b873803b322cf5edbf0ae07e0a27d57df3fbf","LICENSE-APACHE":"0218327e7a480793ffdd4eb792379a9709e5c135c7ba267f709d6f6d4d70af0a","LICENSE-MIT":"4cada0bd02ea3692eee6f16400d86c6508bbd3bafb2b65fed0419f36d4f83e8f","src/generic.rs":"6f38250421846499c816c222d0b48155bfab09a9921e6c400d7b75567ab98f14","src/lib.rs":"bcf308d7037e259d6640a785556fcdb86653cb4f72f64fbfeda9899857c14479","src/soft.rs":"5cdee0e46c99a9d5078c0b3a733fe6fd1430ed0a888ef747bc2a1271265a1140","src/types.rs":"a354d2e3267c7c451a1420903314a358328346772ca964fa6c1ef7b96c983930","src/x86_64/mod.rs":"4d5a1da816f8e59bb385464f005075de889d1060e24dcee6709b321a3d6c92f7","src/x86_64/sse2.rs":"a9df3e7b3b8ffcd249a2cbed0e538042f7747dfa6ae7af0c9af364dc5a12d409"},"package":"ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"}
\ No newline at end of file
diff --git a/third_party/rust/ppv-lite86/Cargo.toml b/third_party/rust/ppv-lite86/Cargo.toml
index 012a7f4d75cf..6ffa7bab2ad8 100644
--- a/third_party/rust/ppv-lite86/Cargo.toml
+++ b/third_party/rust/ppv-lite86/Cargo.toml
@@ -13,7 +13,7 @@
 [package]
 edition = "2018"
 name = "ppv-lite86"
-version = "0.2.6"
+version = "0.2.10"
 authors = ["The CryptoCorrosion Contributors"]
 description = "Implementation of the crypto-simd API for x86"
 keywords = ["crypto", "simd", "x86"]
@@ -24,7 +24,8 @@ repository = "https://github.com/cryptocorrosion/cryptocorrosion"
 [dependencies]
 
 [features]
-default = ["std", "simd"]
+default = ["std"]
+no_simd = []
 simd = []
 std = []
 [badges.travis-ci]
diff --git a/third_party/rust/ppv-lite86/src/generic.rs b/third_party/rust/ppv-lite86/src/generic.rs
index 2d0a74cf0870..f0e83d9638e8 100644
--- a/third_party/rust/ppv-lite86/src/generic.rs
+++ b/third_party/rust/ppv-lite86/src/generic.rs
@@ -1,14 +1,14 @@
 #![allow(non_camel_case_types)]
 
-use core::ops::*;
 use crate::soft::{x2, x4};
 use crate::types::*;
+use core::ops::*;
 
+#[repr(C)]
 #[derive(Clone, Copy)]
 pub union vec128_storage {
     d: [u32; 4],
     q: [u64; 2],
-    o: [u128; 1],
 }
 impl From<[u32; 4]> for vec128_storage {
     #[inline]
@@ -16,7 +16,38 @@ impl From<[u32; 4]> for vec128_storage {
         Self { d }
     }
 }
-#[derive(Clone, Copy)]
+impl From<vec128_storage> for [u32; 4] {
+    #[inline]
+    fn from(d: vec128_storage) -> Self {
+        unsafe { d.d }
+    }
+}
+impl From<[u64; 2]> for vec128_storage {
+    #[inline]
+    fn from(q: [u64; 2]) -> Self {
+        Self { q }
+    }
+}
+impl From<vec128_storage> for [u64; 2] {
+    #[inline]
+    fn from(q: vec128_storage) -> Self {
+        unsafe { q.q }
+    }
+}
+impl Default for vec128_storage {
+    #[inline]
+    fn default() -> Self {
+        Self { q: [0, 0] }
+    }
+}
+impl Eq for vec128_storage {}
+impl PartialEq<vec128_storage> for vec128_storage {
+    #[inline]
+    fn eq(&self, rhs: &Self) -> bool {
+        unsafe { self.q == rhs.q }
+    }
+}
+#[derive(Clone, Copy, PartialEq, Eq, Default)]
 pub struct vec256_storage {
     v128: [vec128_storage; 2],
 }
@@ -30,7 +61,15 @@ impl vec256_storage {
         self.v128
     }
 }
-#[derive(Clone, Copy)]
+impl From<vec256_storage> for [u64; 4] {
+    #[inline]
+    fn from(q: vec256_storage) -> Self {
+        let [a, b]: [u64; 2] = q.v128[0].into();
+        let [c, d]: [u64; 2] = q.v128[1].into();
+        [a, b, c, d]
+    }
+}
+#[derive(Clone, Copy, PartialEq, Eq, Default)]
 pub struct vec512_storage {
     v128: [vec128_storage; 4],
 }
@@ -106,14 +145,22 @@ where
     unsafe { T::unpack(q) }
 }
 
+fn o_of_q(q: [u64; 2]) -> u128 {
+    u128::from(q[0]) | (u128::from(q[1]) << 64)
+}
+
+fn q_of_o(o: u128) -> [u64; 2] {
+    [o as u64, (o >> 64) as u64]
+}
+
 fn omap<T, F>(a: T, f: F) -> T
 where
     T: Store<vec128_storage> + Into<vec128_storage>,
     F: Fn(u128) -> u128,
 {
     let a: vec128_storage = a.into();
-    let ao = unsafe { a.o };
-    let o = vec128_storage { o: [f(ao[0])] };
+    let ao = o_of_q(unsafe { a.q });
+    let o = vec128_storage { q: q_of_o(f(ao)) };
     unsafe { T::unpack(o) }
 }
 
@@ -124,10 +171,10 @@ where
 {
     let a: vec128_storage = a.into();
     let b: vec128_storage = b.into();
-    let ao = unsafe { a.o };
-    let bo = unsafe { b.o };
+    let ao = o_of_q(unsafe { a.q });
+    let bo = o_of_q(unsafe { b.q });
     let o = vec128_storage {
-        o: [f(ao[0], bo[0])],
+        q: q_of_o(f(ao, bo)),
     };
     unsafe { T::unpack(o) }
 }
@@ -411,7 +458,7 @@ impl From<u64x2_generic> for vec128_storage {
 impl From<u128x1_generic> for vec128_storage {
     #[inline(always)]
     fn from(o: u128x1_generic) -> Self {
-        Self { o: o.0 }
+        Self { q: q_of_o(o.0[0]) }
     }
 }
 
@@ -430,7 +477,7 @@ impl Store<vec128_storage> for u64x2_generic {
 impl Store<vec128_storage> for u128x1_generic {
     #[inline(always)]
     unsafe fn unpack(s: vec128_storage) -> Self {
-        Self(s.o)
+        Self([o_of_q(s.q); 1])
     }
 }
 
diff --git a/third_party/rust/ppv-lite86/src/lib.rs b/third_party/rust/ppv-lite86/src/lib.rs
index 43dc5d869a3f..ea89c5123922 100644
--- a/third_party/rust/ppv-lite86/src/lib.rs
+++ b/third_party/rust/ppv-lite86/src/lib.rs
@@ -9,14 +9,14 @@ mod soft;
 mod types;
 pub use self::types::*;
 
-#[cfg(all(feature = "simd", target_arch = "x86_64", not(miri)))]
+#[cfg(all(target_arch = "x86_64", not(feature = "no_simd"), not(miri)))]
 pub mod x86_64;
-#[cfg(all(feature = "simd", target_arch = "x86_64", not(miri)))]
+#[cfg(all(target_arch = "x86_64", not(feature = "no_simd"), not(miri)))]
 use self::x86_64 as arch;
 
-#[cfg(any(miri, not(all(feature = "simd", any(target_arch = "x86_64")))))]
+#[cfg(any(feature = "no_simd", miri, not(target_arch = "x86_64")))]
 pub mod generic;
-#[cfg(any(miri, not(all(feature = "simd", any(target_arch = "x86_64")))))]
+#[cfg(any(feature = "no_simd", miri, not(target_arch = "x86_64")))]
 use self::generic as arch;
 
 pub use self::arch::{vec128_storage, vec256_storage, vec512_storage};
diff --git a/third_party/rust/ppv-lite86/src/soft.rs b/third_party/rust/ppv-lite86/src/soft.rs
index d12dac528f16..8976c484ecef 100644
--- a/third_party/rust/ppv-lite86/src/soft.rs
+++ b/third_party/rust/ppv-lite86/src/soft.rs
@@ -1,9 +1,9 @@
 //! Implement 256- and 512- bit in terms of 128-bit, for machines without native wide SIMD.
 
-use core::marker::PhantomData;
-use core::ops::*;
 use crate::types::*;
 use crate::{vec128_storage, vec256_storage, vec512_storage};
+use core::marker::PhantomData;
+use core::ops::*;
 
 #[derive(Copy, Clone, Default)]
 #[allow(non_camel_case_types)]
@@ -238,7 +238,12 @@ macro_rules! fwd_unop_x4 {
     ($fn:ident) => {
         #[inline(always)]
         fn $fn(self) -> Self {
-            x4([self.0[0].$fn(), self.0[1].$fn(), self.0[2].$fn(), self.0[3].$fn()])
+            x4([
+                self.0[0].$fn(),
+                self.0[1].$fn(),
+                self.0[2].$fn(),
+                self.0[3].$fn(),
+            ])
         }
     };
 }
diff --git a/third_party/rust/ppv-lite86/src/types.rs b/third_party/rust/ppv-lite86/src/types.rs
index 119b6bb8da59..a2826707d383 100644
--- a/third_party/rust/ppv-lite86/src/types.rs
+++ b/third_party/rust/ppv-lite86/src/types.rs
@@ -1,3 +1,4 @@
+#![allow(non_camel_case_types)]
 use core::ops::{Add, AddAssign, BitAnd, BitOr, BitXor, BitXorAssign, Not};
 
 pub trait AndNot {
@@ -44,182 +45,178 @@ pub trait RotateEachWord64 {
 
 pub trait RotateEachWord128 {}
 
-#[allow(non_camel_case_types)]
-mod types {
-    //! Vector type naming scheme:
-    //! uN[xP]xL
-    //! Unsigned; N-bit words * P bits per lane * L lanes
-    //!
-    //! A lane is always 128-bits, chosen because common SIMD architectures treat 128-bit units of
-    //! wide vectors specially (supporting e.g. intra-lane shuffles), and tend to have limited and
-    //! slow inter-lane operations.
+// Vector type naming scheme:
+// uN[xP]xL
+// Unsigned; N-bit words * P bits per lane * L lanes
+//
+// A lane is always 128-bits, chosen because common SIMD architectures treat 128-bit units of
+// wide vectors specially (supporting e.g. intra-lane shuffles), and tend to have limited and
+// slow inter-lane operations.
 
-    use crate::arch::{vec128_storage, vec256_storage, vec512_storage};
-    use crate::{ArithOps, BitOps128, BitOps32, BitOps64, Machine, Store, StoreBytes};
+use crate::arch::{vec128_storage, vec256_storage, vec512_storage};
 
-    pub trait UnsafeFrom<T> {
-        unsafe fn unsafe_from(t: T) -> Self;
-    }
-
-    /// A vector composed of two elements, which may be words or themselves vectors.
-    pub trait Vec2<W> {
-        fn extract(self, i: u32) -> W;
-        fn insert(self, w: W, i: u32) -> Self;
-    }
-
-    /// A vector composed of four elements, which may be words or themselves vectors.
-    pub trait Vec4<W> {
-        fn extract(self, i: u32) -> W;
-        fn insert(self, w: W, i: u32) -> Self;
-    }
-
-    // TODO: multiples of 4 should inherit this
-    /// A vector composed of four words; depending on their size, operations may cross lanes.
-    pub trait Words4 {
-        fn shuffle1230(self) -> Self;
-        fn shuffle2301(self) -> Self;
-        fn shuffle3012(self) -> Self;
-    }
-
-    /// A vector composed one or more lanes each composed of four words.
-    pub trait LaneWords4 {
-        fn shuffle_lane_words1230(self) -> Self;
-        fn shuffle_lane_words2301(self) -> Self;
-        fn shuffle_lane_words3012(self) -> Self;
-    }
-
-    // TODO: make this a part of BitOps
-    /// Exchange neigboring ranges of bits of the specified size
-    pub trait Swap64 {
-        fn swap1(self) -> Self;
-        fn swap2(self) -> Self;
-        fn swap4(self) -> Self;
-        fn swap8(self) -> Self;
-        fn swap16(self) -> Self;
-        fn swap32(self) -> Self;
-        fn swap64(self) -> Self;
-    }
-
-    pub trait u32x4<M: Machine>:
-        BitOps32
-        + Store<vec128_storage>
-        + ArithOps
-        + Vec4<u32>
-        + Words4
-        + LaneWords4
-        + StoreBytes
-        + MultiLane<[u32; 4]>
-        + Into<vec128_storage>
-    {
-}
-    pub trait u64x2<M: Machine>:
-        BitOps64
-        + Store<vec128_storage>
-        + ArithOps
-        + Vec2<u64>
-        + MultiLane<[u64; 2]>
-        + Into<vec128_storage>
-    {
-}
-    pub trait u128x1<M: Machine>:
-        BitOps128 + Store<vec128_storage> + Swap64 + MultiLane<[u128; 1]> + Into<vec128_storage>
-    {
+#[allow(clippy::missing_safety_doc)]
+pub trait UnsafeFrom<T> {
+    unsafe fn unsafe_from(t: T) -> Self;
 }
 
-    pub trait u32x4x2<M: Machine>:
-        BitOps32
-        + Store<vec256_storage>
-        + Vec2<M::u32x4>
-        + MultiLane<[M::u32x4; 2]>
-        + ArithOps
-        + Into<vec256_storage>
-    {
-}
-    pub trait u64x2x2<M: Machine>:
-        BitOps64
-        + Store<vec256_storage>
-        + Vec2<M::u64x2>
-        + MultiLane<[M::u64x2; 2]>
-        + ArithOps
-        + StoreBytes
-        + Into<vec256_storage>
-    {
-}
-    pub trait u64x4<M: Machine>:
-        BitOps64
-        + Store<vec256_storage>
-        + Vec4<u64>
-        + MultiLane<[u64; 4]>
-        + ArithOps
-        + Words4
-        + StoreBytes
-        + Into<vec256_storage>
-    {
-}
-    pub trait u128x2<M: Machine>:
-        BitOps128
-        + Store<vec256_storage>
-        + Vec2<M::u128x1>
-        + MultiLane<[M::u128x1; 2]>
-        + Swap64
-        + Into<vec256_storage>
-    {
+/// A vector composed of two elements, which may be words or themselves vectors.
+pub trait Vec2<W> {
+    fn extract(self, i: u32) -> W;
+    fn insert(self, w: W, i: u32) -> Self;
 }
 
-    pub trait u32x4x4<M: Machine>:
-        BitOps32
-        + Store<vec512_storage>
-        + Vec4<M::u32x4>
-        + MultiLane<[M::u32x4; 4]>
-        + ArithOps
-        + LaneWords4
-        + Into<vec512_storage>
-    {
-}
-    pub trait u64x2x4<M: Machine>:
-        BitOps64
-        + Store<vec512_storage>
-        + Vec4<M::u64x2>
-        + MultiLane<[M::u64x2; 4]>
-        + ArithOps
-        + Into<vec512_storage>
-    {
-}
-    // TODO: Words4
-    pub trait u128x4<M: Machine>:
-        BitOps128
-        + Store<vec512_storage>
-        + Vec4<M::u128x1>
-        + MultiLane<[M::u128x1; 4]>
-        + Swap64
-        + Into<vec512_storage>
-    {
+/// A vector composed of four elements, which may be words or themselves vectors.
+pub trait Vec4<W> {
+    fn extract(self, i: u32) -> W;
+    fn insert(self, w: W, i: u32) -> Self;
 }
 
-    /// A vector composed of multiple 128-bit lanes.
-    pub trait MultiLane<Lanes> {
-        /// Split a multi-lane vector into single-lane vectors.
-        fn to_lanes(self) -> Lanes;
-        /// Build a multi-lane vector from individual lanes.
-        fn from_lanes(lanes: Lanes) -> Self;
-    }
+// TODO: multiples of 4 should inherit this
+/// A vector composed of four words; depending on their size, operations may cross lanes.
+pub trait Words4 {
+    fn shuffle1230(self) -> Self;
+    fn shuffle2301(self) -> Self;
+    fn shuffle3012(self) -> Self;
+}
 
-    /// Combine single vectors into a multi-lane vector.
-    pub trait VZip<V> {
-        fn vzip(self) -> V;
-    }
+/// A vector composed one or more lanes each composed of four words.
+pub trait LaneWords4 {
+    fn shuffle_lane_words1230(self) -> Self;
+    fn shuffle_lane_words2301(self) -> Self;
+    fn shuffle_lane_words3012(self) -> Self;
+}
 
-    impl<V, T> VZip<V> for T
-    where
-        V: MultiLane<T>,
-    {
-        #[inline(always)]
-        fn vzip(self) -> V {
-            V::from_lanes(self)
-        }
+// TODO: make this a part of BitOps
+/// Exchange neigboring ranges of bits of the specified size
+pub trait Swap64 {
+    fn swap1(self) -> Self;
+    fn swap2(self) -> Self;
+    fn swap4(self) -> Self;
+    fn swap8(self) -> Self;
+    fn swap16(self) -> Self;
+    fn swap32(self) -> Self;
+    fn swap64(self) -> Self;
+}
+
+pub trait u32x4<M: Machine>:
+    BitOps32
+    + Store<vec128_storage>
+    + ArithOps
+    + Vec4<u32>
+    + Words4
+    + LaneWords4
+    + StoreBytes
+    + MultiLane<[u32; 4]>
+    + Into<vec128_storage>
+{
+}
+pub trait u64x2<M: Machine>:
+    BitOps64
+    + Store<vec128_storage>
+    + ArithOps
+    + Vec2<u64>
+    + MultiLane<[u64; 2]>
+    + Into<vec128_storage>
+{
+}
+pub trait u128x1<M: Machine>:
+    BitOps128 + Store<vec128_storage> + Swap64 + MultiLane<[u128; 1]> + Into<vec128_storage>
+{
+}
+
+pub trait u32x4x2<M: Machine>:
+    BitOps32
+    + Store<vec256_storage>
+    + Vec2<M::u32x4>
+    + MultiLane<[M::u32x4; 2]>
+    + ArithOps
+    + Into<vec256_storage>
+{
+}
+pub trait u64x2x2<M: Machine>:
+    BitOps64
+    + Store<vec256_storage>
+    + Vec2<M::u64x2>
+    + MultiLane<[M::u64x2; 2]>
+    + ArithOps
+    + StoreBytes
+    + Into<vec256_storage>
+{
+}
+pub trait u64x4<M: Machine>:
+    BitOps64
+    + Store<vec256_storage>
+    + Vec4<u64>
+    + MultiLane<[u64; 4]>
+    + ArithOps
+    + Words4
+    + StoreBytes
+    + Into<vec256_storage>
+{
+}
+pub trait u128x2<M: Machine>:
+    BitOps128
+    + Store<vec256_storage>
+    + Vec2<M::u128x1>
+    + MultiLane<[M::u128x1; 2]>
+    + Swap64
+    + Into<vec256_storage>
+{
+}
+
+pub trait u32x4x4<M: Machine>:
+    BitOps32
+    + Store<vec512_storage>
+    + Vec4<M::u32x4>
+    + MultiLane<[M::u32x4; 4]>
+    + ArithOps
+    + LaneWords4
+    + Into<vec512_storage>
+{
+}
+pub trait u64x2x4<M: Machine>:
+    BitOps64
+    + Store<vec512_storage>
+    + Vec4<M::u64x2>
+    + MultiLane<[M::u64x2; 4]>
+    + ArithOps
+    + Into<vec512_storage>
+{
+}
+// TODO: Words4
+pub trait u128x4<M: Machine>:
+    BitOps128
+    + Store<vec512_storage>
+    + Vec4<M::u128x1>
+    + MultiLane<[M::u128x1; 4]>
+    + Swap64
+    + Into<vec512_storage>
+{
+}
+
+/// A vector composed of multiple 128-bit lanes.
+pub trait MultiLane<Lanes> {
+    /// Split a multi-lane vector into single-lane vectors.
+    fn to_lanes(self) -> Lanes;
+    /// Build a multi-lane vector from individual lanes.
+    fn from_lanes(lanes: Lanes) -> Self;
+}
+
+/// Combine single vectors into a multi-lane vector.
+pub trait VZip<V> {
+    fn vzip(self) -> V;
+}
+
+impl<V, T> VZip<V> for T
+where
+    V: MultiLane<T>,
+{
+    #[inline(always)]
+    fn vzip(self) -> V {
+        V::from_lanes(self)
     }
 }
-pub use self::types::*;
 
 pub trait Machine: Sized + Copy {
     type u32x4: u32x4<Self>;
@@ -264,15 +261,27 @@ pub trait Machine: Sized + Copy {
         unsafe { V::unsafe_read_be(input) }
     }
 
+    /// # Safety
+    /// Caller must ensure the type of Self is appropriate for the hardware of the execution
+    /// environment.
     unsafe fn instance() -> Self;
 }
 
 pub trait Store<S> {
+    /// # Safety
+    /// Caller must ensure the type of Self is appropriate for the hardware of the execution
+    /// environment.
     unsafe fn unpack(p: S) -> Self;
 }
 
 pub trait StoreBytes {
+    /// # Safety
+    /// Caller must ensure the type of Self is appropriate for the hardware of the execution
+    /// environment.
     unsafe fn unsafe_read_le(input: &[u8]) -> Self;
+    /// # Safety
+    /// Caller must ensure the type of Self is appropriate for the hardware of the execution
+    /// environment.
     unsafe fn unsafe_read_be(input: &[u8]) -> Self;
     fn write_le(self, out: &mut [u8]);
     fn write_be(self, out: &mut [u8]);
diff --git a/third_party/rust/ppv-lite86/src/x86_64/mod.rs b/third_party/rust/ppv-lite86/src/x86_64/mod.rs
index 39d3b900648c..d7455d0c6605 100644
--- a/third_party/rust/ppv-lite86/src/x86_64/mod.rs
+++ b/third_party/rust/ppv-lite86/src/x86_64/mod.rs
@@ -1,7 +1,7 @@
 // crate minimums: sse2, x86_64
 
-use core::arch::x86_64::{__m128i, __m256i};
 use crate::types::*;
+use core::arch::x86_64::{__m128i, __m256i};
 
 mod sse2;
 
@@ -137,6 +137,13 @@ impl Default for vec128_storage {
         vec128_storage { u128x1: [0] }
     }
 }
+impl Eq for vec128_storage {}
+impl PartialEq for vec128_storage {
+    #[inline(always)]
+    fn eq(&self, rhs: &Self) -> bool {
+        unsafe { self.u128x1 == rhs.u128x1 }
+    }
+}
 
 #[allow(non_camel_case_types)]
 #[derive(Copy, Clone)]
@@ -167,6 +174,13 @@ impl vec256_storage {
         unsafe { self.sse2 }
     }
 }
+impl Eq for vec256_storage {}
+impl PartialEq for vec256_storage {
+    #[inline(always)]
+    fn eq(&self, rhs: &Self) -> bool {
+        unsafe { self.sse2 == rhs.sse2 }
+    }
+}
 
 #[allow(non_camel_case_types)]
 #[derive(Copy, Clone)]
@@ -193,6 +207,13 @@ impl vec512_storage {
         unsafe { self.sse2 }
     }
 }
+impl Eq for vec512_storage {}
+impl PartialEq for vec512_storage {
+    #[inline(always)]
+    fn eq(&self, rhs: &Self) -> bool {
+        unsafe { self.avx == rhs.avx }
+    }
+}
 
 macro_rules! impl_into {
     ($storage:ident, $array:ty, $name:ident) => {
diff --git a/third_party/rust/ppv-lite86/src/x86_64/sse2.rs b/third_party/rust/ppv-lite86/src/x86_64/sse2.rs
index 81021a99e9ed..bf0063fb64dc 100644
--- a/third_party/rust/ppv-lite86/src/x86_64/sse2.rs
+++ b/third_party/rust/ppv-lite86/src/x86_64/sse2.rs
@@ -166,28 +166,23 @@ macro_rules! impl_bitops128 {
 
 macro_rules! rotr_32_s3 {
     ($name:ident, $k0:expr, $k1:expr) => {
-    #[inline(always)]
-    fn $name(self) -> Self {
-        Self::new(unsafe {
-                _mm_shuffle_epi8(
-                    self.x,
-                    _mm_set_epi64x($k0, $k1),
-                )
-            })
+        #[inline(always)]
+        fn $name(self) -> Self {
+            Self::new(unsafe { _mm_shuffle_epi8(self.x, _mm_set_epi64x($k0, $k1)) })
         }
     };
 }
 macro_rules! rotr_32 {
     ($name:ident, $i:expr) => {
-    #[inline(always)]
-    fn $name(self) -> Self {
-        Self::new(unsafe {
-            _mm_or_si128(
-                _mm_srli_epi32(self.x, $i as i32),
-                _mm_slli_epi32(self.x, 32 - $i as i32),
-            )
-        })
-    }
+        #[inline(always)]
+        fn $name(self) -> Self {
+            Self::new(unsafe {
+                _mm_or_si128(
+                    _mm_srli_epi32(self.x, $i as i32),
+                    _mm_slli_epi32(self.x, 32 - $i as i32),
+                )
+            })
+        }
     };
 }
 impl<S4: Copy, NI: Copy> RotateEachWord32 for u32x4_sse2<YesS3, S4, NI> {
@@ -228,28 +223,23 @@ impl<S4: Copy, NI: Copy> RotateEachWord32 for u32x4_sse2<NoS3, S4, NI> {
 
 macro_rules! rotr_64_s3 {
     ($name:ident, $k0:expr, $k1:expr) => {
-    #[inline(always)]
-    fn $name(self) -> Self {
-        Self::new(unsafe {
-                _mm_shuffle_epi8(
-                    self.x,
-                    _mm_set_epi64x($k0, $k1),
-                )
-            })
+        #[inline(always)]
+        fn $name(self) -> Self {
+            Self::new(unsafe { _mm_shuffle_epi8(self.x, _mm_set_epi64x($k0, $k1)) })
         }
     };
 }
 macro_rules! rotr_64 {
     ($name:ident, $i:expr) => {
-    #[inline(always)]
-    fn $name(self) -> Self {
-        Self::new(unsafe {
-            _mm_or_si128(
-                _mm_srli_epi64(self.x, $i as i32),
-                _mm_slli_epi64(self.x, 64 - $i as i32),
-            )
-        })
-    }
+        #[inline(always)]
+        fn $name(self) -> Self {
+            Self::new(unsafe {
+                _mm_or_si128(
+                    _mm_srli_epi64(self.x, $i as i32),
+                    _mm_slli_epi64(self.x, 64 - $i as i32),
+                )
+            })
+        }
     };
 }
 impl<S4: Copy, NI: Copy> RotateEachWord32 for u64x2_sse2<YesS3, S4, NI> {
@@ -296,15 +286,15 @@ impl<S3: Copy, S4: Copy, NI: Copy> RotateEachWord64 for u64x2_sse2<S3, S4, NI> {
 
 macro_rules! rotr_128 {
     ($name:ident, $i:expr) => {
-    #[inline(always)]
-    fn $name(self) -> Self {
-        Self::new(unsafe {
-            _mm_or_si128(
-                _mm_srli_si128(self.x, $i as i32),
-                _mm_slli_si128(self.x, 128 - $i as i32),
-            )
-        })
-    }
+        #[inline(always)]
+        fn $name(self) -> Self {
+            Self::new(unsafe {
+                _mm_or_si128(
+                    _mm_srli_si128(self.x, $i as i32),
+                    _mm_slli_si128(self.x, 128 - $i as i32),
+                )
+            })
+        }
     };
 }
 // TODO: completely unoptimized
@@ -411,7 +401,7 @@ impl<S3, S4, NI> MultiLane<[u128; 1]> for u128x1_sse2<S3, S4, NI> {
     }
     #[inline(always)]
     fn from_lanes(xs: [u128; 1]) -> Self {
-        unimplemented!()
+        unimplemented!("{:?}", xs)
     }
 }
 
@@ -780,7 +770,7 @@ impl<S4, NI> BSwap for u128x1_sse2<YesS3, S4, NI> {
 impl<S4, NI> BSwap for u128x1_sse2<NoS3, S4, NI> {
     #[inline(always)]
     fn bswap(self) -> Self {
-        Self::new(unsafe { unimplemented!() })
+        unimplemented!()
     }
 }
 
@@ -1078,6 +1068,7 @@ impl<W: PartialEq, G> PartialEq for x2<W, G> {
     }
 }
 
+#[allow(unused)]
 #[inline(always)]
 unsafe fn eq128_s4(x: __m128i, y: __m128i) -> bool {
     let q = _mm_shuffle_epi32(_mm_cmpeq_epi64(x, y), 0b1100_0110);
@@ -1136,13 +1127,14 @@ where
 }
 
 #[cfg(test)]
+#[cfg(target_arch = "x86_64")]
 mod test {
     use super::*;
     use crate::x86_64::{SSE2, SSE41, SSSE3};
     use crate::Machine;
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(target_feature = "ssse3"), ignore)]
     fn test_bswap32_s2_vs_s3() {
         let xs = [0x0f0e_0d0c, 0x0b0a_0908, 0x0706_0504, 0x0302_0100];
         let ys = [0x0c0d_0e0f, 0x0809_0a0b, 0x0405_0607, 0x0001_0203];
@@ -1165,7 +1157,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(target_feature = "ssse3"), ignore)]
     fn test_bswap64_s2_vs_s3() {
         let xs = [0x0f0e_0d0c_0b0a_0908, 0x0706_0504_0302_0100];
         let ys = [0x0809_0a0b_0c0d_0e0f, 0x0001_0203_0405_0607];
@@ -1188,7 +1180,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(target_feature = "ssse3"), ignore)]
     fn test_shuffle32_s2_vs_s3() {
         let xs = [0x0, 0x1, 0x2, 0x3];
         let ys = [0x2, 0x3, 0x0, 0x1];
@@ -1226,7 +1218,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(target_feature = "ssse3"), ignore)]
     fn test_shuffle64_s2_vs_s3() {
         let xs = [0x0, 0x1, 0x2, 0x3];
         let ys = [0x2, 0x3, 0x0, 0x1];
@@ -1263,8 +1255,8 @@ mod test {
         assert_eq!(x_s3, unsafe { core::mem::transmute(x_s3) });
     }
 
+    #[cfg_attr(not(all(target_feature = "ssse3", target_feature = "sse4.1")), ignore)]
     #[test]
-    #[cfg(target_arch = "x86_64")]
     fn test_lanes_u32x4() {
         let xs = [0x1, 0x2, 0x3, 0x4];
 
@@ -1295,7 +1287,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(all(target_feature = "ssse3", target_feature = "sse4.1")), ignore)]
     fn test_lanes_u64x2() {
         let xs = [0x1, 0x2];
 
@@ -1326,7 +1318,6 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
     fn test_vec4_u32x4_s2() {
         let xs = [1, 2, 3, 4];
         let s2 = unsafe { SSE2::instance() };
@@ -1342,7 +1333,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(all(target_feature = "ssse3", target_feature = "sse4.1")), ignore)]
     fn test_vec4_u32x4_s4() {
         let xs = [1, 2, 3, 4];
         let s4 = unsafe { SSE41::instance() };
@@ -1358,7 +1349,6 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
     fn test_vec2_u64x2_s2() {
         let xs = [0x1, 0x2];
         let s2 = unsafe { SSE2::instance() };
@@ -1370,7 +1360,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(target_arch = "x86_64")]
+    #[cfg_attr(not(all(target_feature = "ssse3", target_feature = "sse4.1")), ignore)]
     fn test_vec4_u64x2_s4() {
         let xs = [0x1, 0x2];
         let s4 = unsafe { SSE41::instance() };
@@ -1493,19 +1483,13 @@ pub mod avx2 {
     impl<NI> ArithOps for u32x4x4_avx2<NI> where NI: Copy {}
     macro_rules! shuf_lane_bytes {
         ($name:ident, $k0:expr, $k1:expr) => {
-        #[inline(always)]
-        fn $name(self) -> Self {
-            Self::new(unsafe {
-                [
-                    _mm256_shuffle_epi8(
-                        self.x[0],
-                        _mm256_set_epi64x($k0, $k1, $k0, $k1),
-                    ),
-                    _mm256_shuffle_epi8(
-                        self.x[1],
-                        _mm256_set_epi64x($k0, $k1, $k0, $k1),
-                    )
-                ]
+            #[inline(always)]
+            fn $name(self) -> Self {
+                Self::new(unsafe {
+                    [
+                        _mm256_shuffle_epi8(self.x[0], _mm256_set_epi64x($k0, $k1, $k0, $k1)),
+                        _mm256_shuffle_epi8(self.x[1], _mm256_set_epi64x($k0, $k1, $k0, $k1)),
+                    ]
                 })
             }
         };
@@ -1523,7 +1507,7 @@ pub mod avx2 {
                         _mm256_or_si256(
                             _mm256_srli_epi32(self.x[1], $i as i32),
                             _mm256_slli_epi32(self.x[1], 32 - $i as i32),
-                        )
+                        ),
                     ]
                 })
             }