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authorMikael Urankar <mikael@FreeBSD.org>2024-05-08 08:54:13 +0000
committerMikael Urankar <mikael@FreeBSD.org>2024-05-13 11:03:23 +0000
commitcc6466e821dd5655bbc18ffd61d3527228a94015 (patch)
tree5dc6e8d5b569100485bbba8d5ed3a9bc543405aa
parentaf25c5b0245afd6636372d4e9c49463170ead66e (diff)
downloadports-cc6466e821dd5655bbc18ffd61d3527228a94015.tar.gz
ports-cc6466e821dd5655bbc18ffd61d3527228a94015.zip
www/firefox-esr: Fix build with rust 1.78.0
PR: 278834 Approved by: portmgr (build fix blanket)
Diffstat
-rw-r--r--www/firefox-esr/files/patch-rust-1.78.03582
-rw-r--r--www/firefox-esr/files/patch-rust-1.78.0-arm64
2 files changed, 3646 insertions, 0 deletions
diff --git a/www/firefox-esr/files/patch-rust-1.78.0 b/www/firefox-esr/files/patch-rust-1.78.0
new file mode 100644
index 000000000000..7e6685d5e8e7
--- /dev/null
+++ b/www/firefox-esr/files/patch-rust-1.78.0
@@ -0,0 +1,3582 @@
+Adapted from https://hg.mozilla.org/mozilla-central/rev/1db2ef126a6a
+--
+
+# HG changeset patch
+# User Henri Sivonen <hsivonen@hsivonen.fi>
+# Date 1714462184 0
+# Node ID 1db2ef126a6a8555dbf50345e16492c977b42e92
+# Parent a545e84b3674c4878f2e618b7bce23058f2ac690
+Bug 1882209 - Update encoding_rs to 0.8.34 to deal with rustc changes. r=glandium,supply-chain-reviewers
+
+Differential Revision: https://phabricator.services.mozilla.com/D207167
+
+diff --git a/.cargo/config.in b/.cargo/config.in
+--- .cargo/config.in
++++ .cargo/config.in
+@@ -35,31 +35,31 @@ git = "https://github.com/gfx-rs/wgpu"
+ rev = "f71a1bc736fde37509262ca03e91d8f56a13aeb5"
+ replace-with = "vendored-sources"
+
+ [source."git+https://github.com/glandium/warp?rev=4af45fae95bc98b0eba1ef0db17e1dac471bb23d"]
+ git = "https://github.com/glandium/warp"
+ rev = "4af45fae95bc98b0eba1ef0db17e1dac471bb23d"
+ replace-with = "vendored-sources"
+
++[source."git+https://github.com/hsivonen/any_all_workaround?rev=7fb1b7034c9f172aade21ee1c8554e8d8a48af80"]
++git = "https://github.com/hsivonen/any_all_workaround"
++rev = "7fb1b7034c9f172aade21ee1c8554e8d8a48af80"
++replace-with = "vendored-sources"
++
+ [source."git+https://github.com/hsivonen/chardetng?rev=3484d3e3ebdc8931493aa5df4d7ee9360a90e76b"]
+ git = "https://github.com/hsivonen/chardetng"
+ rev = "3484d3e3ebdc8931493aa5df4d7ee9360a90e76b"
+ replace-with = "vendored-sources"
+
+ [source."git+https://github.com/hsivonen/chardetng_c?rev=ed8a4c6f900a90d4dbc1d64b856e61490a1c3570"]
+ git = "https://github.com/hsivonen/chardetng_c"
+ rev = "ed8a4c6f900a90d4dbc1d64b856e61490a1c3570"
+ replace-with = "vendored-sources"
+
+-[source."git+https://github.com/hsivonen/packed_simd?rev=e588ceb568878e1a3156ea9ce551d5b63ef0cdc4"]
+-git = "https://github.com/hsivonen/packed_simd"
+-rev = "e588ceb568878e1a3156ea9ce551d5b63ef0cdc4"
+-replace-with = "vendored-sources"
+-
+ [source."git+https://github.com/jfkthame/mapped_hyph.git?rev=c7651a0cffff41996ad13c44f689bd9cd2192c01"]
+ git = "https://github.com/jfkthame/mapped_hyph.git"
+ rev = "c7651a0cffff41996ad13c44f689bd9cd2192c01"
+ replace-with = "vendored-sources"
+
+ [source."git+https://github.com/mozilla-spidermonkey/jsparagus?rev=64ba08e24749616de2344112f226d1ef4ba893ae"]
+ git = "https://github.com/mozilla-spidermonkey/jsparagus"
+ rev = "64ba08e24749616de2344112f226d1ef4ba893ae"
+diff --git a/Cargo.lock b/Cargo.lock
+--- Cargo.lock
++++ Cargo.lock
+@@ -80,16 +80,25 @@ dependencies = [
+ name = "android_system_properties"
+ version = "0.1.5"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+ checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+ dependencies = [
+ "libc",
+ ]
+
++[[package]]
++name = "any_all_workaround"
++version = "0.1.0"
++source = "git+https://github.com/hsivonen/any_all_workaround?rev=7fb1b7034c9f172aade21ee1c8554e8d8a48af80#7fb1b7034c9f172aade21ee1c8554e8d8a48af80"
++dependencies = [
++ "cfg-if 1.0.0",
++ "version_check",
++]
++
+ [[package]]
+ name = "anyhow"
+ version = "1.0.69"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+ checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
+
+ [[package]]
+ name = "app_services_logger"
+@@ -1431,22 +1440,22 @@ dependencies = [
+ "encoding_rs",
+ "nserror",
+ "nsstring",
+ "xmldecl",
+ ]
+
+ [[package]]
+ name = "encoding_rs"
+-version = "0.8.33"
++version = "0.8.34"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+-checksum = "7268b386296a025e474d5140678f75d6de9493ae55a5d709eeb9dd08149945e1"
++checksum = "b45de904aa0b010bce2ab45264d0631681847fa7b6f2eaa7dab7619943bc4f59"
+ dependencies = [
++ "any_all_workaround",
+ "cfg-if 1.0.0",
+- "packed_simd",
+ ]
+
+ [[package]]
+ name = "enum-primitive-derive"
+ version = "0.2.2"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+ checksum = "c375b9c5eadb68d0a6efee2999fef292f45854c3444c86f09d8ab086ba942b0e"
+ dependencies = [
+@@ -3901,25 +3910,16 @@ checksum = "8d91edf4fbb970279443471345a4e8c491bf05bb283b3e6c88e4e606fd8c181b"
+ [[package]]
+ name = "oxilangtag-ffi"
+ version = "0.1.0"
+ dependencies = [
+ "nsstring",
+ "oxilangtag",
+ ]
+
+-[[package]]
+-name = "packed_simd"
+-version = "0.3.9"
+-source = "git+https://github.com/hsivonen/packed_simd?rev=e588ceb568878e1a3156ea9ce551d5b63ef0cdc4#e588ceb568878e1a3156ea9ce551d5b63ef0cdc4"
+-dependencies = [
+- "cfg-if 1.0.0",
+- "num-traits",
+-]
+-
+ [[package]]
+ name = "parking_lot"
+ version = "0.11.2"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+ checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
+ dependencies = [
+ "instant",
+ "lock_api",
+diff --git a/Cargo.toml b/Cargo.toml
+--- Cargo.toml
++++ Cargo.toml
+@@ -154,22 +154,22 @@ rure = { path = "third_party/rust/rure" }
+
+ # 0.31.1 but without rust-cssparser#342.
+ # TODO: Remove these, and just use v0.31.1 once bug 1836219 lands
+ # (which will get syn 2 into the tree).
+ cssparser = { path = "third_party/rust/cssparser" }
+ cssparser-macros = { path = "third_party/rust/cssparser-macros" }
+
+ # Other overrides
++any_all_workaround = { git = "https://github.com/hsivonen/any_all_workaround", rev = "7fb1b7034c9f172aade21ee1c8554e8d8a48af80" }
+ chardetng = { git = "https://github.com/hsivonen/chardetng", rev="3484d3e3ebdc8931493aa5df4d7ee9360a90e76b" }
+ chardetng_c = { git = "https://github.com/hsivonen/chardetng_c", rev="ed8a4c6f900a90d4dbc1d64b856e61490a1c3570" }
+ coremidi = { git = "https://github.com/chris-zen/coremidi.git", rev="fc68464b5445caf111e41f643a2e69ccce0b4f83" }
+ firefox-on-glean = { path = "toolkit/components/glean/api" }
+ libudev-sys = { path = "dom/webauthn/libudev-sys" }
+-packed_simd = { git = "https://github.com/hsivonen/packed_simd", rev = "e588ceb568878e1a3156ea9ce551d5b63ef0cdc4" }
+ midir = { git = "https://github.com/mozilla/midir.git", rev = "519e651241e867af3391db08f9ae6400bc023e18" }
+ # warp 0.3.3 + https://github.com/seanmonstar/warp/pull/1007
+ warp = { git = "https://github.com/glandium/warp", rev = "4af45fae95bc98b0eba1ef0db17e1dac471bb23d" }
+
+ # application-services overrides to make updating them all simpler.
+ interrupt-support = { git = "https://github.com/mozilla/application-services", rev = "86c84c217036c12283d19368867323a66bf35883" }
+ sql-support = { git = "https://github.com/mozilla/application-services", rev = "86c84c217036c12283d19368867323a66bf35883" }
+ sync15 = { git = "https://github.com/mozilla/application-services", rev = "86c84c217036c12283d19368867323a66bf35883" }
+diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
+--- config/makefiles/rust.mk
++++ config/makefiles/rust.mk
+@@ -260,17 +260,17 @@ export COREAUDIO_SDK_PATH=$(IPHONEOS_SDK
+ export IPHONEOS_SDK_DIR
+ PATH := $(topsrcdir)/build/macosx:$(PATH)
+ endif
+ endif
+
+ ifndef RUSTC_BOOTSTRAP
+ RUSTC_BOOTSTRAP := mozglue_static,qcms
+ ifdef MOZ_RUST_SIMD
+-RUSTC_BOOTSTRAP := $(RUSTC_BOOTSTRAP),encoding_rs,packed_simd
++RUSTC_BOOTSTRAP := $(RUSTC_BOOTSTRAP),encoding_rs,any_all_workaround
+ endif
+ export RUSTC_BOOTSTRAP
+ endif
+
+ target_rust_ltoable := force-cargo-library-build $(ADD_RUST_LTOABLE)
+ target_rust_nonltoable := force-cargo-test-run force-cargo-program-build
+
+ ifdef MOZ_PGO_RUST
+diff --git a/supply-chain/audits.toml b/supply-chain/audits.toml
+--- supply-chain/audits.toml
++++ supply-chain/audits.toml
+@@ -596,16 +596,29 @@ who = "Mike Hommey <mh+mozilla@glandium.
+ criteria = "safe-to-deploy"
+ delta = "0.1.2 -> 0.1.4"
+
+ [[audits.android_system_properties]]
+ who = "Mike Hommey <mh+mozilla@glandium.org>"
+ criteria = "safe-to-deploy"
+ delta = "0.1.4 -> 0.1.5"
+
++[[audits.any_all_workaround]]
++who = "Henri Sivonen <hsivonen@hsivonen.fi>"
++criteria = "safe-to-deploy"
++version = "0.1.0"
++notes = "The little code that is in this crate I reviewed and modified from packed_simd (which has previously been vendored in full instead of just this small part)."
++
++[[audits.any_all_workaround]]
++who = "Henri Sivonen <hsivonen@hsivonen.fi>"
++criteria = "safe-to-deploy"
++delta = "0.1.0 -> 0.1.0@git:7fb1b7034c9f172aade21ee1c8554e8d8a48af80"
++importable = false
++notes = "This is a trivial workaround copied from elsewhere in m-c, specifically qcms."
++
+ [[audits.anyhow]]
+ who = "Mike Hommey <mh+mozilla@glandium.org>"
+ criteria = "safe-to-deploy"
+ delta = "1.0.57 -> 1.0.61"
+
+ [[audits.anyhow]]
+ who = "Bobby Holley <bobbyholley@gmail.com>"
+ criteria = "safe-to-deploy"
+diff --git a/supply-chain/config.toml b/supply-chain/config.toml
+--- supply-chain/config.toml
++++ supply-chain/config.toml
+@@ -14,16 +14,20 @@ url = "https://raw.githubusercontent.com
+ url = "https://raw.githubusercontent.com/google/supply-chain/main/audits.toml"
+
+ [imports.isrg]
+ url = "https://raw.githubusercontent.com/divviup/libprio-rs/main/supply-chain/audits.toml"
+
+ [imports.mozilla]
+ url = "https://raw.githubusercontent.com/mozilla/supply-chain/main/audits.toml"
+
++[policy.any_all_workaround]
++audit-as-crates-io = true
++notes = "This is the upstream code plus the ARM intrinsics workaround from qcms, see bug 1882209."
++
+ [policy.autocfg]
+ audit-as-crates-io = true
+ notes = "This is the upstream code plus a few local fixes, see bug 1685697."
+
+ [policy.chardetng]
+ audit-as-crates-io = true
+ notes = "This is a crate Henri wrote which is also published. We should probably update Firefox to tip and certify that."
+
+diff --git a/supply-chain/imports.lock b/supply-chain/imports.lock
+--- supply-chain/imports.lock
++++ supply-chain/imports.lock
+@@ -115,16 +115,23 @@ user-name = "David Tolnay"
+
+ [[publisher.encoding_rs]]
+ version = "0.8.33"
+ when = "2023-08-23"
+ user-id = 4484
+ user-login = "hsivonen"
+ user-name = "Henri Sivonen"
+
++[[publisher.encoding_rs]]
++version = "0.8.34"
++when = "2024-04-10"
++user-id = 4484
++user-login = "hsivonen"
++user-name = "Henri Sivonen"
++
+ [[publisher.etagere]]
+ version = "0.2.7"
+ when = "2022-05-04"
+ user-id = 1281
+ user-login = "nical"
+ user-name = "Nicolas Silva"
+
+ [[publisher.euclid]]
+diff --git a/third_party/rust/any_all_workaround/.cargo-checksum.json b/third_party/rust/any_all_workaround/.cargo-checksum.json
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/.cargo-checksum.json
+@@ -0,0 +1,1 @@
++{"files":{"Cargo.toml":"f8c127449dc9432d404c21c99833e4617ab88a797445af249a7fe3c989985d6d","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"6485b8ed310d3f0340bf1ad1f47645069ce4069dcc6bb46c7d5c6faf41de1fdb","LICENSE-MIT-QCMS":"36d847ae882f6574ebc72f56a4f354e4f104fde4a584373496482e97d52d31bc","README.md":"4c617b8ced3a27b7edecf0e5e41ed451c04e88dab529e7a35fccc4e1551efbd7","build.rs":"56b29ab6da3e49075bfd0a7b690267c8016298bf0d332e2e68bbaf19decbbf71","src/lib.rs":"7118106690b9d25c5d0a3e2079feb83d76f1d434d0da36b9d0351806d27c850d"},"package":null}
+\ No newline at end of file
+diff --git a/third_party/rust/any_all_workaround/Cargo.toml b/third_party/rust/any_all_workaround/Cargo.toml
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/Cargo.toml
+@@ -0,0 +1,28 @@
++# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
++#
++# When uploading crates to the registry Cargo will automatically
++# "normalize" Cargo.toml files for maximal compatibility
++# with all versions of Cargo and also rewrite `path` dependencies
++# to registry (e.g., crates.io) dependencies.
++#
++# If you are reading this file be aware that the original Cargo.toml
++# will likely look very different (and much more reasonable).
++# See Cargo.toml.orig for the original contents.
++
++[package]
++edition = "2021"
++name = "any_all_workaround"
++version = "0.1.0"
++authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"]
++description = "Workaround for bad LLVM codegen for boolean reductions on 32-bit ARM"
++homepage = "https://docs.rs/any_all_workaround/"
++documentation = "https://docs.rs/any_all_workaround/"
++readme = "README.md"
++license = "MIT OR Apache-2.0"
++repository = "https://github.com/hsivonen/any_all_workaround"
++
++[dependencies]
++cfg-if = "1.0"
++
++[build-dependencies]
++version_check = "0.9"
+diff --git a/third_party/rust/packed_simd/LICENSE-APACHE b/third_party/rust/any_all_workaround/LICENSE-APACHE
+rename from third_party/rust/packed_simd/LICENSE-APACHE
+rename to third_party/rust/any_all_workaround/LICENSE-APACHE
+diff --git a/third_party/rust/packed_simd/LICENSE-MIT b/third_party/rust/any_all_workaround/LICENSE-MIT
+rename from third_party/rust/packed_simd/LICENSE-MIT
+rename to third_party/rust/any_all_workaround/LICENSE-MIT
+diff --git a/third_party/rust/any_all_workaround/LICENSE-MIT-QCMS b/third_party/rust/any_all_workaround/LICENSE-MIT-QCMS
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/LICENSE-MIT-QCMS
+@@ -0,0 +1,21 @@
++qcms
++Copyright (C) 2009-2024 Mozilla Corporation
++Copyright (C) 1998-2007 Marti Maria
++
++Permission is hereby granted, free of charge, to any person obtaining
++a copy of this software and associated documentation files (the "Software"),
++to deal in the Software without restriction, including without limitation
++the rights to use, copy, modify, merge, publish, distribute, sublicense,
++and/or sell copies of the Software, and to permit persons to whom the Software
++is furnished to do so, subject to the following conditions:
++
++The above copyright notice and this permission notice shall be included in
++all copies or substantial portions of the Software.
++
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
++EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
++THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
++NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
++LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
++OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+diff --git a/third_party/rust/any_all_workaround/README.md b/third_party/rust/any_all_workaround/README.md
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/README.md
+@@ -0,0 +1,13 @@
++# any_all_workaround
++
++This is a workaround for bad codegen ([Rust bug](https://github.com/rust-lang/portable-simd/issues/146), [LLVM bug](https://github.com/llvm/llvm-project/issues/50466)) for the `any()` and `all()` reductions for NEON-backed SIMD vectors on 32-bit ARM. On other platforms these delegate to `any()` and `all()` in `core::simd`.
++
++The plan is to abandon this crate once the LLVM bug is fixed or `core::simd` works around the LLVM bug.
++
++The code is forked from the [`packed_simd` crate](https://raw.githubusercontent.com/hsivonen/packed_simd/d938e39bee9bc5c222f5f2f2a0df9e53b5ce36ae/src/codegen/reductions/mask/arm.rs).
++
++This crate requires Nightly Rust as it depends on the `portable_simd` feature.
++
++# License
++
++`MIT OR Apache-2.0`, since that's how `packed_simd` is licensed. (The ARM intrinsics Rust version workaround is from qcms, see LICENSE-MIT-QCMS.)
+diff --git a/third_party/rust/any_all_workaround/build.rs b/third_party/rust/any_all_workaround/build.rs
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/build.rs
+@@ -0,0 +1,7 @@
++extern crate version_check as rustc;
++
++fn main() {
++ if rustc::is_min_version("1.78.0").unwrap_or(false) {
++ println!("cargo:rustc-cfg=stdsimd_split");
++ }
++}
+diff --git a/third_party/rust/any_all_workaround/src/lib.rs b/third_party/rust/any_all_workaround/src/lib.rs
+new file mode 100644
+--- /dev/null
++++ third_party/rust/any_all_workaround/src/lib.rs
+@@ -0,0 +1,110 @@
++// This code began as a fork of
++// https://raw.githubusercontent.com/rust-lang/packed_simd/d938e39bee9bc5c222f5f2f2a0df9e53b5ce36ae/src/codegen/reductions/mask/arm.rs
++// which didn't have a license header on the file, but Cargo.toml said "MIT OR Apache-2.0".
++// See LICENSE-MIT and LICENSE-APACHE.
++
++#![no_std]
++#![feature(portable_simd)]
++#![cfg_attr(
++ all(
++ stdsimd_split,
++ target_arch = "arm",
++ target_endian = "little",
++ target_feature = "neon",
++ target_feature = "v7"
++ ),
++ feature(stdarch_arm_neon_intrinsics)
++)]
++#![cfg_attr(
++ all(
++ not(stdsimd_split),
++ target_arch = "arm",
++ target_endian = "little",
++ target_feature = "neon",
++ target_feature = "v7"
++ ),
++ feature(stdsimd)
++)]
++
++use cfg_if::cfg_if;
++use core::simd::mask16x8;
++use core::simd::mask32x4;
++use core::simd::mask8x16;
++
++cfg_if! {
++ if #[cfg(all(target_arch = "arm", target_endian = "little", target_feature = "neon", target_feature = "v7"))] {
++ use core::simd::mask8x8;
++ use core::simd::mask16x4;
++ use core::simd::mask32x2;
++ macro_rules! arm_128_v7_neon_impl {
++ ($all:ident, $any:ident, $id:ident, $half:ident, $vpmin:ident, $vpmax:ident) => {
++ #[inline]
++ pub fn $all(s: $id) -> bool {
++ use core::arch::arm::$vpmin;
++ use core::mem::transmute;
++ unsafe {
++ union U {
++ halves: ($half, $half),
++ vec: $id,
++ }
++ let halves = U { vec: s }.halves;
++ let h: $half = transmute($vpmin(transmute(halves.0), transmute(halves.1)));
++ h.all()
++ }
++ }
++ #[inline]
++ pub fn $any(s: $id) -> bool {
++ use core::arch::arm::$vpmax;
++ use core::mem::transmute;
++ unsafe {
++ union U {
++ halves: ($half, $half),
++ vec: $id,
++ }
++ let halves = U { vec: s }.halves;
++ let h: $half = transmute($vpmax(transmute(halves.0), transmute(halves.1)));
++ h.any()
++ }
++ }
++ }
++ }
++ } else {
++ macro_rules! arm_128_v7_neon_impl {
++ ($all:ident, $any:ident, $id:ident, $half:ident, $vpmin:ident, $vpmax:ident) => {
++ #[inline(always)]
++ pub fn $all(s: $id) -> bool {
++ s.all()
++ }
++ #[inline(always)]
++ pub fn $any(s: $id) -> bool {
++ s.any()
++ }
++ }
++ }
++ }
++}
++
++arm_128_v7_neon_impl!(
++ all_mask8x16,
++ any_mask8x16,
++ mask8x16,
++ mask8x8,
++ vpmin_u8,
++ vpmax_u8
++);
++arm_128_v7_neon_impl!(
++ all_mask16x8,
++ any_mask16x8,
++ mask16x8,
++ mask16x4,
++ vpmin_u16,
++ vpmax_u16
++);
++arm_128_v7_neon_impl!(
++ all_mask32x4,
++ any_mask32x4,
++ mask32x4,
++ mask32x2,
++ vpmin_u32,
++ vpmax_u32
++);
+diff --git a/third_party/rust/encoding_rs/Cargo.toml b/third_party/rust/encoding_rs/Cargo.toml
+--- third_party/rust/encoding_rs/Cargo.toml
++++ third_party/rust/encoding_rs/Cargo.toml
+@@ -6,18 +6,19 @@
+ # to registry (e.g., crates.io) dependencies.
+ #
+ # If you are reading this file be aware that the original Cargo.toml
+ # will likely look very different (and much more reasonable).
+ # See Cargo.toml.orig for the original contents.
+
+ [package]
+ edition = "2018"
++rust-version = "1.36"
+ name = "encoding_rs"
+-version = "0.8.33"
++version = "0.8.34"
+ authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"]
+ description = "A Gecko-oriented implementation of the Encoding Standard"
+ homepage = "https://docs.rs/encoding_rs/"
+ documentation = "https://docs.rs/encoding_rs/"
+ readme = "README.md"
+ keywords = [
+ "encoding",
+ "web",
+@@ -31,23 +32,23 @@ categories = [
+ "internationalization",
+ ]
+ license = "(Apache-2.0 OR MIT) AND BSD-3-Clause"
+ repository = "https://github.com/hsivonen/encoding_rs"
+
+ [profile.release]
+ lto = true
+
++[dependencies.any_all_workaround]
++version = "0.1.0"
++optional = true
++
+ [dependencies.cfg-if]
+ version = "1.0"
+
+-[dependencies.packed_simd]
+-version = "0.3.9"
+-optional = true
+-
+ [dependencies.serde]
+ version = "1.0"
+ optional = true
+
+ [dev-dependencies.bincode]
+ version = "1.0"
+
+ [dev-dependencies.serde_derive]
+@@ -69,15 +70,9 @@ fast-legacy-encode = [
+ "fast-hanja-encode",
+ "fast-kanji-encode",
+ "fast-gb-hanzi-encode",
+ "fast-big5-hanzi-encode",
+ ]
+ less-slow-big5-hanzi-encode = []
+ less-slow-gb-hanzi-encode = []
+ less-slow-kanji-encode = []
+-simd-accel = [
+- "packed_simd",
+- "packed_simd/into_bits",
+-]
+-
+-[badges.travis-ci]
+-repository = "hsivonen/encoding_rs"
++simd-accel = ["any_all_workaround"]
+diff --git a/third_party/rust/encoding_rs/README.md b/third_party/rust/encoding_rs/README.md
+--- third_party/rust/encoding_rs/README.md
++++ third_party/rust/encoding_rs/README.md
+@@ -162,50 +162,36 @@ wrappers.
+ * [C++](https://github.com/hsivonen/recode_cpp)
+
+ ## Optional features
+
+ There are currently these optional cargo features:
+
+ ### `simd-accel`
+
+-Enables SIMD acceleration using the nightly-dependent `packed_simd` crate.
++Enables SIMD acceleration using the nightly-dependent `portable_simd` standard
++library feature.
+
+ This is an opt-in feature, because enabling this feature _opts out_ of Rust's
+ guarantees of future compilers compiling old code (aka. "stability story").
+
+ Currently, this has not been tested to be an improvement except for these
+-targets:
++targets and enabling the `simd-accel` feature is expected to break the build
++on other targets:
+
+ * x86_64
+ * i686
+ * aarch64
+ * thumbv7neon
+
+ If you use nightly Rust, you use targets whose first component is one of the
+ above, and you are prepared _to have to revise your configuration when updating
+ Rust_, you should enable this feature. Otherwise, please _do not_ enable this
+ feature.
+
+-_Note!_ If you are compiling for a target that does not have 128-bit SIMD
+-enabled as part of the target definition and you are enabling 128-bit SIMD
+-using `-C target_feature`, you need to enable the `core_arch` Cargo feature
+-for `packed_simd` to compile a crates.io snapshot of `core_arch` instead of
+-using the standard-library copy of `core::arch`, because the `core::arch`
+-module of the pre-compiled standard library has been compiled with the
+-assumption that the CPU doesn't have 128-bit SIMD. At present this applies
+-mainly to 32-bit ARM targets whose first component does not include the
+-substring `neon`.
+-
+-The encoding_rs side of things has not been properly set up for POWER,
+-PowerPC, MIPS, etc., SIMD at this time, so even if you were to follow
+-the advice from the previous paragraph, you probably shouldn't use
+-the `simd-accel` option on the less mainstream architectures at this
+-time.
+-
+ Used by Firefox.
+
+ ### `serde`
+
+ Enables support for serializing and deserializing `&'static Encoding`-typed
+ struct fields using [Serde][1].
+
+ [1]: https://serde.rs/
+@@ -376,18 +362,19 @@ It is a goal to support the latest stabl
+ the version of Rust that's used for Firefox Nightly.
+
+ At this time, there is no firm commitment to support a version older than
+ what's required by Firefox, and there is no commitment to treat MSRV changes
+ as semver-breaking, because this crate depends on `cfg-if`, which doesn't
+ appear to treat MSRV changes as semver-breaking, so it would be useless for
+ this crate to treat MSRV changes as semver-breaking.
+
+-As of 2021-02-04, MSRV appears to be Rust 1.36.0 for using the crate and
++As of 2024-04-04, MSRV appears to be Rust 1.36.0 for using the crate and
+ 1.42.0 for doc tests to pass without errors about the global allocator.
++With the `simd-accel` feature, the MSRV is even higher.
+
+ ## Compatibility with rust-encoding
+
+ A compatibility layer that implements the rust-encoding API on top of
+ encoding_rs is
+ [provided as a separate crate](https://github.com/hsivonen/encoding_rs_compat)
+ (cannot be uploaded to crates.io). The compatibility layer was originally
+ written with the assuption that Firefox would need it, but it is not currently
+@@ -441,20 +428,27 @@ To regenerate the generated code:
+ - [x] Implement the rust-encoding API in terms of encoding_rs.
+ - [x] Add SIMD acceleration for Aarch64.
+ - [x] Investigate the use of NEON on 32-bit ARM.
+ - [ ] ~Investigate Björn Höhrmann's lookup table acceleration for UTF-8 as
+ adapted to Rust in rust-encoding.~
+ - [x] Add actually fast CJK encode options.
+ - [ ] ~Investigate [Bob Steagall's lookup table acceleration for UTF-8](https://github.com/BobSteagall/CppNow2018/blob/master/FastConversionFromUTF-8/Fast%20Conversion%20From%20UTF-8%20with%20C%2B%2B%2C%20DFAs%2C%20and%20SSE%20Intrinsics%20-%20Bob%20Steagall%20-%20C%2B%2BNow%202018.pdf).~
+ - [x] Provide a build mode that works without `alloc` (with lesser API surface).
+-- [ ] Migrate to `std::simd` once it is stable and declare 1.0.
++- [x] Migrate to `std::simd` ~once it is stable and declare 1.0.~
++- [ ] Migrate `unsafe` slice access by larger types than `u8`/`u16` to `align_to`.
+
+ ## Release Notes
+
++### 0.8.34
++
++* Use the `portable_simd` nightly feature of the standard library instead of the `packed_simd` crate. Only affects the `simd-accel` optional nightly feature.
++* Internal documentation improvements and minor code improvements around `unsafe`.
++* Added `rust-version` to `Cargo.toml`.
++
+ ### 0.8.33
+
+ * Use `packed_simd` instead of `packed_simd_2` again now that updates are back under the `packed_simd` name. Only affects the `simd-accel` optional nightly feature.
+
+ ### 0.8.32
+
+ * Removed `build.rs`. (This removal should resolve false positives reported by some antivirus products. This may break some build configurations that have opted out of Rust's guarantees against future build breakage.)
+ * Internal change to what API is used for reinterpreting the lane configuration of SIMD vectors.
+diff --git a/third_party/rust/encoding_rs/src/ascii.rs b/third_party/rust/encoding_rs/src/ascii.rs
+--- third_party/rust/encoding_rs/src/ascii.rs
++++ third_party/rust/encoding_rs/src/ascii.rs
+@@ -46,71 +46,87 @@ cfg_if! {
+ #[allow(dead_code)]
+ #[inline(always)]
+ fn likely(b: bool) -> bool {
+ b
+ }
+ }
+ }
+
++// Safety invariants for masks: data & mask = 0 for valid ASCII or basic latin utf-16
++
+ // `as` truncates, so works on 32-bit, too.
+ #[allow(dead_code)]
+ pub const ASCII_MASK: usize = 0x8080_8080_8080_8080u64 as usize;
+
+ // `as` truncates, so works on 32-bit, too.
+ #[allow(dead_code)]
+ pub const BASIC_LATIN_MASK: usize = 0xFF80_FF80_FF80_FF80u64 as usize;
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_naive {
+ ($name:ident, $src_unit:ty, $dst_unit:ty) => {
++ /// Safety: src and dst must have len_unit elements and be aligned
++ /// Safety-usable invariant: will return Some() when it fails
++ /// to convert. The first value will be a u8 that is > 127.
+ #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ // Yes, manually omitting the bound check here matters
+ // a lot for perf.
+ for i in 0..len {
++ // Safety: len invariant used here
+ let code_unit = *(src.add(i));
++ // Safety: Upholds safety-usable invariant here
+ if code_unit > 127 {
+ return Some((code_unit, i));
+ }
++ // Safety: len invariant used here
+ *(dst.add(i)) = code_unit as $dst_unit;
+ }
+ return None;
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_alu {
+ ($name:ident,
++ // safety invariant: src/dst MUST be u8
+ $src_unit:ty,
+ $dst_unit:ty,
++ // Safety invariant: stride_fn must consume and produce two usizes, and return the index of the first non-ascii when it fails
+ $stride_fn:ident) => {
++ /// Safety: src and dst must have len elements, src is valid for read, dst is valid for
++ /// write
++ /// Safety-usable invariant: will return Some() when it fails
++ /// to convert. The first value will be a u8 that is > 127.
+ #[cfg_attr(feature = "cargo-clippy", allow(never_loop, cast_ptr_alignment))]
+ #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ let mut offset = 0usize;
+ // This loop is only broken out of as a `goto` forward
+ loop {
++ // Safety: until_alignment becomes the number of bytes we need to munch until we are aligned to usize
+ let mut until_alignment = {
+ // Check if the other unit aligns if we move the narrower unit
+ // to alignment.
+ // if ::core::mem::size_of::<$src_unit>() == ::core::mem::size_of::<$dst_unit>() {
+ // ascii_to_ascii
+ let src_alignment = (src as usize) & ALU_ALIGNMENT_MASK;
+ let dst_alignment = (dst as usize) & ALU_ALIGNMENT_MASK;
+ if src_alignment != dst_alignment {
++ // Safety: bails early and ends up in the naïve branch where usize-alignment doesn't matter
+ break;
+ }
+ (ALU_ALIGNMENT - src_alignment) & ALU_ALIGNMENT_MASK
+ // } else if ::core::mem::size_of::<$src_unit>() < ::core::mem::size_of::<$dst_unit>() {
+ // ascii_to_basic_latin
+ // let src_until_alignment = (ALIGNMENT - ((src as usize) & ALIGNMENT_MASK)) & ALIGNMENT_MASK;
+ // if (dst.add(src_until_alignment) as usize) & ALIGNMENT_MASK != 0 {
+ // break;
+@@ -129,74 +145,104 @@ macro_rules! ascii_alu {
+ // Moving pointers to alignment seems to be a pessimization on
+ // x86_64 for operations that have UTF-16 as the internal
+ // Unicode representation. However, since it seems to be a win
+ // on ARM (tested ARMv7 code running on ARMv8 [rpi3]), except
+ // mixed results when encoding from UTF-16 and since x86 and
+ // x86_64 should be using SSE2 in due course, keeping the move
+ // to alignment here. It would be good to test on more ARM CPUs
+ // and on real MIPS and POWER hardware.
++ //
++ // Safety: This is the naïve code once again, for `until_alignment` bytes
+ while until_alignment != 0 {
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety: Upholds safety-usable invariant here
+ return Some((code_unit, offset));
+ }
+ *(dst.add(offset)) = code_unit as $dst_unit;
++ // Safety: offset is the number of bytes copied so far
+ offset += 1;
+ until_alignment -= 1;
+ }
+ let len_minus_stride = len - ALU_STRIDE_SIZE;
+ loop {
++ // Safety: num_ascii is known to be a byte index of a non-ascii byte due to stride_fn's invariant
+ if let Some(num_ascii) = $stride_fn(
++ // Safety: These are known to be valid and aligned since we have at
++ // least ALU_STRIDE_SIZE data in these buffers, and offset is the
++ // number of elements copied so far, which according to the
++ // until_alignment calculation above will cause both src and dst to be
++ // aligned to usize after this add
+ src.add(offset) as *const usize,
+ dst.add(offset) as *mut usize,
+ ) {
+ offset += num_ascii;
++ // Safety: Upholds safety-usable invariant here by indexing into non-ascii byte
+ return Some((*(src.add(offset)), offset));
+ }
++ // Safety: offset continues to be the number of bytes copied so far, and
++ // maintains usize alignment for the next loop iteration
+ offset += ALU_STRIDE_SIZE;
++ // Safety: This is `offset > len - stride. This loop will continue as long as
++ // `offset <= len - stride`, which means there are `stride` bytes to still be read.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ break;
+ }
++
++ // Safety: This is the naïve code, same as ascii_naive, and has no requirements
++ // other than src/dst being valid for the the right lens
+ while offset < len {
++ // Safety: len invariant used here
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety: Upholds safety-usable invariant here
+ return Some((code_unit, offset));
+ }
++ // Safety: len invariant used here
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! basic_latin_alu {
+ ($name:ident,
++ // safety invariant: use u8 for src/dest for ascii, and u16 for basic_latin
+ $src_unit:ty,
+ $dst_unit:ty,
++ // safety invariant: stride function must munch ALU_STRIDE_SIZE*size(src_unit) bytes off of src and
++ // write ALU_STRIDE_SIZE*size(dst_unit) bytes to dst
+ $stride_fn:ident) => {
++ /// Safety: src and dst must have len elements, src is valid for read, dst is valid for
++ /// write
++ /// Safety-usable invariant: will return Some() when it fails
++ /// to convert. The first value will be a u8 that is > 127.
+ #[cfg_attr(
+ feature = "cargo-clippy",
+ allow(never_loop, cast_ptr_alignment, cast_lossless)
+ )]
+ #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ let mut offset = 0usize;
+ // This loop is only broken out of as a `goto` forward
+ loop {
++ // Safety: until_alignment becomes the number of bytes we need to munch from src/dest until we are aligned to usize
++ // We ensure basic-latin has the same alignment as ascii, starting with ascii since it is smaller.
+ let mut until_alignment = {
+ // Check if the other unit aligns if we move the narrower unit
+ // to alignment.
+ // if ::core::mem::size_of::<$src_unit>() == ::core::mem::size_of::<$dst_unit>() {
+ // ascii_to_ascii
+ // let src_alignment = (src as usize) & ALIGNMENT_MASK;
+ // let dst_alignment = (dst as usize) & ALIGNMENT_MASK;
+ // if src_alignment != dst_alignment {
+@@ -232,66 +278,89 @@ macro_rules! basic_latin_alu {
+ // Moving pointers to alignment seems to be a pessimization on
+ // x86_64 for operations that have UTF-16 as the internal
+ // Unicode representation. However, since it seems to be a win
+ // on ARM (tested ARMv7 code running on ARMv8 [rpi3]), except
+ // mixed results when encoding from UTF-16 and since x86 and
+ // x86_64 should be using SSE2 in due course, keeping the move
+ // to alignment here. It would be good to test on more ARM CPUs
+ // and on real MIPS and POWER hardware.
++ //
++ // Safety: This is the naïve code once again, for `until_alignment` bytes
+ while until_alignment != 0 {
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety: Upholds safety-usable invariant here
+ return Some((code_unit, offset));
+ }
+ *(dst.add(offset)) = code_unit as $dst_unit;
++ // Safety: offset is the number of bytes copied so far
+ offset += 1;
+ until_alignment -= 1;
+ }
+ let len_minus_stride = len - ALU_STRIDE_SIZE;
+ loop {
+ if !$stride_fn(
++ // Safety: These are known to be valid and aligned since we have at
++ // least ALU_STRIDE_SIZE data in these buffers, and offset is the
++ // number of elements copied so far, which according to the
++ // until_alignment calculation above will cause both src and dst to be
++ // aligned to usize after this add
+ src.add(offset) as *const usize,
+ dst.add(offset) as *mut usize,
+ ) {
+ break;
+ }
++ // Safety: offset continues to be the number of bytes copied so far, and
++ // maintains usize alignment for the next loop iteration
+ offset += ALU_STRIDE_SIZE;
++ // Safety: This is `offset > len - stride. This loop will continue as long as
++ // `offset <= len - stride`, which means there are `stride` bytes to still be read.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ break;
+ }
++ // Safety: This is the naïve code once again, for leftover bytes
+ while offset < len {
++ // Safety: len invariant used here
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety: Upholds safety-usable invariant here
+ return Some((code_unit, offset));
+ }
++ // Safety: len invariant used here
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! latin1_alu {
++ // safety invariant: stride function must munch ALU_STRIDE_SIZE*size(src_unit) bytes off of src and
++ // write ALU_STRIDE_SIZE*size(dst_unit) bytes to dst
+ ($name:ident, $src_unit:ty, $dst_unit:ty, $stride_fn:ident) => {
++ /// Safety: src and dst must have len elements, src is valid for read, dst is valid for
++ /// write
+ #[cfg_attr(
+ feature = "cargo-clippy",
+ allow(never_loop, cast_ptr_alignment, cast_lossless)
+ )]
+ #[inline(always)]
+ pub unsafe fn $name(src: *const $src_unit, dst: *mut $dst_unit, len: usize) {
+ let mut offset = 0usize;
+ // This loop is only broken out of as a `goto` forward
+ loop {
++ // Safety: until_alignment becomes the number of bytes we need to munch from src/dest until we are aligned to usize
++ // We ensure the UTF-16 side has the same alignment as the Latin-1 side, starting with Latin-1 since it is smaller.
+ let mut until_alignment = {
+ if ::core::mem::size_of::<$src_unit>() < ::core::mem::size_of::<$dst_unit>() {
+ // unpack
+ let src_until_alignment = (ALU_ALIGNMENT
+ - ((src as usize) & ALU_ALIGNMENT_MASK))
+ & ALU_ALIGNMENT_MASK;
+ if (dst.wrapping_add(src_until_alignment) as usize) & ALU_ALIGNMENT_MASK
+ != 0
+@@ -308,373 +377,485 @@ macro_rules! latin1_alu {
+ != 0
+ {
+ break;
+ }
+ dst_until_alignment
+ }
+ };
+ if until_alignment + ALU_STRIDE_SIZE <= len {
++ // Safety: This is the naïve code once again, for `until_alignment` bytes
+ while until_alignment != 0 {
+ let code_unit = *(src.add(offset));
+ *(dst.add(offset)) = code_unit as $dst_unit;
++ // Safety: offset is the number of bytes copied so far
+ offset += 1;
+ until_alignment -= 1;
+ }
+ let len_minus_stride = len - ALU_STRIDE_SIZE;
+ loop {
+ $stride_fn(
++ // Safety: These are known to be valid and aligned since we have at
++ // least ALU_STRIDE_SIZE data in these buffers, and offset is the
++ // number of elements copied so far, which according to the
++ // until_alignment calculation above will cause both src and dst to be
++ // aligned to usize after this add
+ src.add(offset) as *const usize,
+ dst.add(offset) as *mut usize,
+ );
++ // Safety: offset continues to be the number of bytes copied so far, and
++ // maintains usize alignment for the next loop iteration
+ offset += ALU_STRIDE_SIZE;
++ // Safety: This is `offset > len - stride. This loop will continue as long as
++ // `offset <= len - stride`, which means there are `stride` bytes to still be read.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ break;
+ }
++ // Safety: This is the naïve code once again, for leftover bytes
+ while offset < len {
++ // Safety: len invariant used here
+ let code_unit = *(src.add(offset));
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_simd_check_align {
+ (
+ $name:ident,
+ $src_unit:ty,
+ $dst_unit:ty,
++ // Safety: This function must require aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_both_aligned:ident,
++ // Safety: This function must require aligned/unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_src_aligned:ident,
++ // Safety: This function must require unaligned/aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_dst_aligned:ident,
++ // Safety: This function must require unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_neither_aligned:ident
+ ) => {
++ /// Safety: src/dst must be valid for reads/writes of `len` elements of their units.
++ ///
++ /// Safety-usable invariant: will return Some() when it encounters non-ASCII, with the first element in the Some being
++ /// guaranteed to be non-ASCII (> 127), and the second being the offset where it is found
+ #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `SIMD_STRIDE_SIZE` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
+ // XXX Should we first process one stride unconditionally as unaligned to
+ // avoid the cost of the branchiness below if the first stride fails anyway?
+ // XXX Should we just use unaligned SSE2 access unconditionally? It seems that
+ // on Haswell, it would make sense to just use unaligned and not bother
+ // checking. Need to benchmark older architectures before deciding.
+ let dst_masked = (dst as usize) & SIMD_ALIGNMENT_MASK;
++ // Safety: checking whether src is aligned
+ if ((src as usize) & SIMD_ALIGNMENT_MASK) == 0 {
++ // Safety: Checking whether dst is aligned
+ if dst_masked == 0 {
+ loop {
++ // Safety: We're valid to read/write SIMD_STRIDE_SIZE elements and have the appropriate alignments
+ if !$stride_both_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE` which means we always have at least `SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ } else {
+ loop {
++ // Safety: We're valid to read/write SIMD_STRIDE_SIZE elements and have the appropriate alignments
+ if !$stride_src_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE` which means we always have at least `SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ } else {
+ if dst_masked == 0 {
+ loop {
++ // Safety: We're valid to read/write SIMD_STRIDE_SIZE elements and have the appropriate alignments
+ if !$stride_dst_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE` which means we always have at least `SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ } else {
+ loop {
++ // Safety: We're valid to read/write SIMD_STRIDE_SIZE elements and have the appropriate alignments
+ if !$stride_neither_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE` which means we always have at least `SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ }
+ }
+ while offset < len {
++ // Safety: uses len invariant here and below
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety: upholds safety-usable invariant
+ return Some((code_unit, offset));
+ }
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_simd_check_align_unrolled {
+ (
+ $name:ident,
+ $src_unit:ty,
+ $dst_unit:ty,
++ // Safety: This function must require aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_both_aligned:ident,
++ // Safety: This function must require aligned/unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_src_aligned:ident,
++ // Safety: This function must require unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_neither_aligned:ident,
++ // Safety: This function must require aligned src/dest that are valid for reading/writing 2*SIMD_STRIDE_SIZE src_unit/dst_unit
+ $double_stride_both_aligned:ident,
++ // Safety: This function must require aligned/unaligned src/dest that are valid for reading/writing 2*SIMD_STRIDE_SIZE src_unit/dst_unit
+ $double_stride_src_aligned:ident
+ ) => {
+- #[inline(always)]
++ /// Safety: src/dst must be valid for reads/writes of `len` elements of their units.
++ ///
++ /// Safety-usable invariant: will return Some() when it encounters non-ASCII, with the first element in the Some being
++ /// guaranteed to be non-ASCII (> 127), and the second being the offset where it is found #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ let unit_size = ::core::mem::size_of::<$src_unit>();
+ let mut offset = 0usize;
+ // This loop is only broken out of as a goto forward without
+ // actually looping
+ 'outer: loop {
++ // Safety: if this check succeeds we're valid for reading/writing at least `SIMD_STRIDE_SIZE` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ // First, process one unaligned
++ // Safety: this is safe to call since we're valid for this read/write
+ if !$stride_neither_aligned(src, dst) {
+ break 'outer;
+ }
+ offset = SIMD_STRIDE_SIZE;
+
+ // We have now seen 16 ASCII bytes. Let's guess that
+ // there will be enough more to justify more expense
+ // in the case of non-ASCII.
+ // Use aligned reads for the sake of old microachitectures.
++ //
++ // Safety: this correctly calculates the number of src_units that need to be read before the remaining list is aligned.
++ // This is less that SIMD_ALIGNMENT, which is also SIMD_STRIDE_SIZE (as documented)
+ let until_alignment = ((SIMD_ALIGNMENT
+ - ((src.add(offset) as usize) & SIMD_ALIGNMENT_MASK))
+ & SIMD_ALIGNMENT_MASK)
+ / unit_size;
+- // This addition won't overflow, because even in the 32-bit PAE case the
++ // Safety: This addition won't overflow, because even in the 32-bit PAE case the
+ // address space holds enough code that the slice length can't be that
+ // close to address space size.
+ // offset now equals SIMD_STRIDE_SIZE, hence times 3 below.
++ //
++ // Safety: if this check succeeds we're valid for reading/writing at least `2 * SIMD_STRIDE_SIZE` elements plus `until_alignment`.
++ // The extra SIMD_STRIDE_SIZE in the condition is because `offset` is already `SIMD_STRIDE_SIZE`.
+ if until_alignment + (SIMD_STRIDE_SIZE * 3) <= len {
+ if until_alignment != 0 {
++ // Safety: this is safe to call since we're valid for this read/write (and more), and don't care about alignment
++ // This will copy over bytes that get decoded twice since it's not incrementing `offset` by SIMD_STRIDE_SIZE. This is fine.
+ if !$stride_neither_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += until_alignment;
+ }
++ // Safety: At this point we're valid for reading/writing 2*SIMD_STRIDE_SIZE elements
++ // Safety: Now `offset` is aligned for `src`
+ let len_minus_stride_times_two = len - (SIMD_STRIDE_SIZE * 2);
++ // Safety: This is whether dst is aligned
+ let dst_masked = (dst.add(offset) as usize) & SIMD_ALIGNMENT_MASK;
+ if dst_masked == 0 {
+ loop {
++ // Safety: both are aligned, we can call the aligned function. We're valid for reading/writing double stride from the initial condition
++ // and the loop break condition below
+ if let Some(advance) =
+ $double_stride_both_aligned(src.add(offset), dst.add(offset))
+ {
+ offset += advance;
+ let code_unit = *(src.add(offset));
++ // Safety: uses safety-usable invariant on ascii_to_ascii_simd_double_stride to return
++ // guaranteed non-ascii
+ return Some((code_unit, offset));
+ }
+ offset += SIMD_STRIDE_SIZE * 2;
++ // Safety: This is `offset > len - 2 * SIMD_STRIDE_SIZE` which means we always have at least `2 * SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride_times_two {
+ break;
+ }
+ }
++ // Safety: We're valid for reading/writing one more, and can still assume alignment
+ if offset + SIMD_STRIDE_SIZE <= len {
+ if !$stride_both_aligned(src.add(offset), dst.add(offset)) {
+ break 'outer;
+ }
+ offset += SIMD_STRIDE_SIZE;
+ }
+ } else {
+ loop {
++ // Safety: only src is aligned here. We're valid for reading/writing double stride from the initial condition
++ // and the loop break condition below
+ if let Some(advance) =
+ $double_stride_src_aligned(src.add(offset), dst.add(offset))
+ {
+ offset += advance;
+ let code_unit = *(src.add(offset));
++ // Safety: uses safety-usable invariant on ascii_to_ascii_simd_double_stride to return
++ // guaranteed non-ascii
+ return Some((code_unit, offset));
+ }
+ offset += SIMD_STRIDE_SIZE * 2;
++ // Safety: This is `offset > len - 2 * SIMD_STRIDE_SIZE` which means we always have at least `2 * SIMD_STRIDE_SIZE` elements to munch next time.
++
+ if offset > len_minus_stride_times_two {
+ break;
+ }
+ }
++ // Safety: We're valid for reading/writing one more, and can still assume alignment
+ if offset + SIMD_STRIDE_SIZE <= len {
+ if !$stride_src_aligned(src.add(offset), dst.add(offset)) {
+ break 'outer;
+ }
+ offset += SIMD_STRIDE_SIZE;
+ }
+ }
+ } else {
+ // At most two iterations, so unroll
+ if offset + SIMD_STRIDE_SIZE <= len {
++ // Safety: The check above ensures we're allowed to read/write this, and we don't use alignment
+ if !$stride_neither_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
+ if offset + SIMD_STRIDE_SIZE <= len {
++ // Safety: The check above ensures we're allowed to read/write this, and we don't use alignment
+ if !$stride_neither_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
+ }
+ }
+ }
+ }
+ break 'outer;
+ }
+ while offset < len {
++ // Safety: relies straightforwardly on the `len` invariant
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety-usable invariant upheld here
+ return Some((code_unit, offset));
+ }
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! latin1_simd_check_align {
+ (
+ $name:ident,
+ $src_unit:ty,
+ $dst_unit:ty,
++ // Safety: This function must require aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_both_aligned:ident,
++ // Safety: This function must require aligned/unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_src_aligned:ident,
++ // Safety: This function must require unaligned/aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_dst_aligned:ident,
++ // Safety: This function must require unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_neither_aligned:ident
++
+ ) => {
++ /// Safety: src/dst must be valid for reads/writes of `len` elements of their units.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const $src_unit, dst: *mut $dst_unit, len: usize) {
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `SIMD_STRIDE_SIZE` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
++ // Whether dst is aligned
+ let dst_masked = (dst as usize) & SIMD_ALIGNMENT_MASK;
++ // Whether src is aligned
+ if ((src as usize) & SIMD_ALIGNMENT_MASK) == 0 {
+ if dst_masked == 0 {
+ loop {
++ // Safety: Both were aligned, we can use the aligned function
+ $stride_both_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE`, which means in the next iteration we're valid for
++ // reading/writing at least SIMD_STRIDE_SIZE elements.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ } else {
+ loop {
++ // Safety: src was aligned, dst was not
+ $stride_src_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE`, which means in the next iteration we're valid for
++ // reading/writing at least SIMD_STRIDE_SIZE elements.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ } else {
+ if dst_masked == 0 {
+ loop {
++ // Safety: src was aligned, dst was not
+ $stride_dst_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE`, which means in the next iteration we're valid for
++ // reading/writing at least SIMD_STRIDE_SIZE elements.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ } else {
+ loop {
++ // Safety: Neither were aligned
+ $stride_neither_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE`, which means in the next iteration we're valid for
++ // reading/writing at least SIMD_STRIDE_SIZE elements.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ }
+ }
+ while offset < len {
++ // Safety: relies straightforwardly on the `len` invariant
+ let code_unit = *(src.add(offset));
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! latin1_simd_check_align_unrolled {
+ (
+ $name:ident,
+ $src_unit:ty,
+ $dst_unit:ty,
++ // Safety: This function must require aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_both_aligned:ident,
++ // Safety: This function must require aligned/unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_src_aligned:ident,
++ // Safety: This function must require unaligned/aligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_dst_aligned:ident,
++ // Safety: This function must require unaligned src/dest that are valid for reading/writing SIMD_STRIDE_SIZE src_unit/dst_unit
+ $stride_neither_aligned:ident
+ ) => {
++ /// Safety: src/dst must be valid for reads/writes of `len` elements of their units.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const $src_unit, dst: *mut $dst_unit, len: usize) {
+ let unit_size = ::core::mem::size_of::<$src_unit>();
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `SIMD_STRIDE_SIZE` elements.
+ if SIMD_STRIDE_SIZE <= len {
++ // Safety: this correctly calculates the number of src_units that need to be read before the remaining list is aligned.
++ // This is by definition less than SIMD_STRIDE_SIZE.
+ let mut until_alignment = ((SIMD_STRIDE_SIZE
+ - ((src as usize) & SIMD_ALIGNMENT_MASK))
+ & SIMD_ALIGNMENT_MASK)
+ / unit_size;
+ while until_alignment != 0 {
++ // Safety: This is a straightforward copy, since until_alignment is < SIMD_STRIDE_SIZE < len, this is in-bounds
+ *(dst.add(offset)) = *(src.add(offset)) as $dst_unit;
+ offset += 1;
+ until_alignment -= 1;
+ }
++ // Safety: here offset will be `until_alignment`, i.e. enough to align `src`.
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
++ // Safety: if this check succeeds we're valid for reading/writing at least `2 * SIMD_STRIDE_SIZE` elements.
+ if offset + SIMD_STRIDE_SIZE * 2 <= len {
+ let len_minus_stride_times_two = len_minus_stride - SIMD_STRIDE_SIZE;
++ // Safety: at this point src is known to be aligned at offset, dst is not.
+ if (dst.add(offset) as usize) & SIMD_ALIGNMENT_MASK == 0 {
+ loop {
++ // Safety: We checked alignment of dst above, we can use the alignment functions. We're allowed to read/write 2*SIMD_STRIDE_SIZE elements, which we do.
+ $stride_both_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
+ $stride_both_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - 2 * SIMD_STRIDE_SIZE` which means we always have at least `2 * SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride_times_two {
+ break;
+ }
+ }
+ } else {
+ loop {
++ // Safety: we ensured alignment of src already.
+ $stride_src_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
+ $stride_src_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - 2 * SIMD_STRIDE_SIZE` which means we always have at least `2 * SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride_times_two {
+ break;
+ }
+ }
+ }
+ }
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE` which means we are valid to munch SIMD_STRIDE_SIZE more elements, which we do
+ if offset < len_minus_stride {
+ $stride_src_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
+ }
+ }
+ while offset < len {
++ // Safety: uses len invariant here and below
+ let code_unit = *(src.add(offset));
+ // On x86_64, this loop autovectorizes but in the pack
+ // case there are instructions whose purpose is to make sure
+ // each u16 in the vector is truncated before packing. However,
+ // since we don't care about saturating behavior of SSE2 packing
+ // when the input isn't Latin1, those instructions are useless.
+ // Unfortunately, using the `assume` intrinsic to lie to the
+ // optimizer doesn't make LLVM omit the trunctation that we
+@@ -688,138 +869,180 @@ macro_rules! latin1_simd_check_align_unr
+ offset += 1;
+ }
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_simd_unalign {
++ // Safety: stride_neither_aligned must be a function that requires src/dest be valid for unaligned reads/writes for SIMD_STRIDE_SIZE elements of type src_unit/dest_unit
+ ($name:ident, $src_unit:ty, $dst_unit:ty, $stride_neither_aligned:ident) => {
++ /// Safety: src and dst must be valid for reads/writes of len elements of type src_unit/dst_unit
++ ///
++ /// Safety-usable invariant: will return Some() when it encounters non-ASCII, with the first element in the Some being
++ /// guaranteed to be non-ASCII (> 127), and the second being the offset where it is found
+ #[inline(always)]
+ pub unsafe fn $name(
+ src: *const $src_unit,
+ dst: *mut $dst_unit,
+ len: usize,
+ ) -> Option<($src_unit, usize)> {
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `stride` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
+ loop {
++ // Safety: We know we're valid for `stride` reads/writes, so we can call this function. We don't need alignment.
+ if !$stride_neither_aligned(src.add(offset), dst.add(offset)) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // This is `offset > len - stride` which means we always have at least `stride` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ while offset < len {
++ // Safety: Uses len invariant here and below
+ let code_unit = *(src.add(offset));
+ if code_unit > 127 {
++ // Safety-usable invariant upheld here
+ return Some((code_unit, offset));
+ }
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! latin1_simd_unalign {
++ // Safety: stride_neither_aligned must be a function that requires src/dest be valid for unaligned reads/writes for SIMD_STRIDE_SIZE elements of type src_unit/dest_unit
+ ($name:ident, $src_unit:ty, $dst_unit:ty, $stride_neither_aligned:ident) => {
++ /// Safety: src and dst must be valid for unaligned reads/writes of len elements of type src_unit/dst_unit
+ #[inline(always)]
+ pub unsafe fn $name(src: *const $src_unit, dst: *mut $dst_unit, len: usize) {
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `stride` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
+ loop {
++ // Safety: We know we're valid for `stride` reads/writes, so we can call this function. We don't need alignment.
+ $stride_neither_aligned(src.add(offset), dst.add(offset));
+ offset += SIMD_STRIDE_SIZE;
++ // This is `offset > len - stride` which means we always have at least `stride` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ while offset < len {
++ // Safety: Uses len invariant here
+ let code_unit = *(src.add(offset));
+ *(dst.add(offset)) = code_unit as $dst_unit;
+ offset += 1;
+ }
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_to_ascii_simd_stride {
++ // Safety: load/store must be valid for 16 bytes of read/write, which may be unaligned. (candidates: `(load|store)(16|8)_(unaligned|aligned)` functions)
+ ($name:ident, $load:ident, $store:ident) => {
++ /// Safety: src and dst must be valid for 16 bytes of read/write according to
++ /// the $load/$store fn, which may allow for unaligned reads/writes or require
++ /// alignment to either 16x8 or u8x16.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u8, dst: *mut u8) -> bool {
+ let simd = $load(src);
+ if !simd_is_ascii(simd) {
+ return false;
+ }
+ $store(dst, simd);
+ true
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_to_ascii_simd_double_stride {
++ // Safety: store must be valid for 32 bytes of write, which may be unaligned (candidates: `store(8|16)_(aligned|unaligned)`)
+ ($name:ident, $store:ident) => {
++ /// Safety: src must be valid for 32 bytes of aligned u8x16 read
++ /// dst must be valid for 32 bytes of unaligned write according to
++ /// the $store fn, which may allow for unaligned writes or require
++ /// alignment to either 16x8 or u8x16.
++ ///
++ /// Safety-usable invariant: Returns Some(index) if the element at `index` is invalid ASCII
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u8, dst: *mut u8) -> Option<usize> {
+ let first = load16_aligned(src);
+ let second = load16_aligned(src.add(SIMD_STRIDE_SIZE));
+ $store(dst, first);
+ if unlikely(!simd_is_ascii(first | second)) {
++ // Safety: mask_ascii produces a mask of all the high bits.
+ let mask_first = mask_ascii(first);
+ if mask_first != 0 {
++ // Safety: on little endian systems this will be the number of ascii bytes
++ // before the first non-ascii, i.e. valid for indexing src
++ // TODO SAFETY: What about big-endian systems?
+ return Some(mask_first.trailing_zeros() as usize);
+ }
+ $store(dst.add(SIMD_STRIDE_SIZE), second);
+ let mask_second = mask_ascii(second);
++ // Safety: on little endian systems this will be the number of ascii bytes
++ // before the first non-ascii, i.e. valid for indexing src
+ return Some(SIMD_STRIDE_SIZE + mask_second.trailing_zeros() as usize);
+ }
+ $store(dst.add(SIMD_STRIDE_SIZE), second);
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_to_basic_latin_simd_stride {
++ // Safety: load/store must be valid for 16 bytes of read/write, which may be unaligned. (candidates: `(load|store)(16|8)_(unaligned|aligned)` functions)
+ ($name:ident, $load:ident, $store:ident) => {
++ /// Safety: src and dst must be valid for 16/32 bytes of read/write according to
++ /// the $load/$store fn, which may allow for unaligned reads/writes or require
++ /// alignment to either 16x8 or u8x16.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u8, dst: *mut u16) -> bool {
+ let simd = $load(src);
+ if !simd_is_ascii(simd) {
+ return false;
+ }
+ let (first, second) = simd_unpack(simd);
+ $store(dst, first);
+ $store(dst.add(8), second);
+ true
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! ascii_to_basic_latin_simd_double_stride {
++ // Safety: store must be valid for 16 bytes of write, which may be unaligned
+ ($name:ident, $store:ident) => {
++ /// Safety: src must be valid for 2*SIMD_STRIDE_SIZE bytes of aligned reads,
++ /// aligned to either 16x8 or u8x16.
++ /// dst must be valid for 2*SIMD_STRIDE_SIZE bytes of aligned or unaligned reads
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u8, dst: *mut u16) -> Option<usize> {
+ let first = load16_aligned(src);
+ let second = load16_aligned(src.add(SIMD_STRIDE_SIZE));
+ let (a, b) = simd_unpack(first);
+ $store(dst, a);
++ // Safety: divide by 2 since it's a u16 pointer
+ $store(dst.add(SIMD_STRIDE_SIZE / 2), b);
+ if unlikely(!simd_is_ascii(first | second)) {
+ let mask_first = mask_ascii(first);
+ if mask_first != 0 {
+ return Some(mask_first.trailing_zeros() as usize);
+ }
+ let (c, d) = simd_unpack(second);
+ $store(dst.add(SIMD_STRIDE_SIZE), c);
+@@ -832,47 +1055,59 @@ macro_rules! ascii_to_basic_latin_simd_d
+ $store(dst.add(SIMD_STRIDE_SIZE + (SIMD_STRIDE_SIZE / 2)), d);
+ None
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! unpack_simd_stride {
++ // Safety: load/store must be valid for 16 bytes of read/write, which may be unaligned. (candidates: `(load|store)(16|8)_(unaligned|aligned)` functions)
+ ($name:ident, $load:ident, $store:ident) => {
++ /// Safety: src and dst must be valid for 16 bytes of read/write according to
++ /// the $load/$store fn, which may allow for unaligned reads/writes or require
++ /// alignment to either 16x8 or u8x16.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u8, dst: *mut u16) {
+ let simd = $load(src);
+ let (first, second) = simd_unpack(simd);
+ $store(dst, first);
+ $store(dst.add(8), second);
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! basic_latin_to_ascii_simd_stride {
++ // Safety: load/store must be valid for 16 bytes of read/write, which may be unaligned. (candidates: `(load|store)(16|8)_(unaligned|aligned)` functions)
+ ($name:ident, $load:ident, $store:ident) => {
++ /// Safety: src and dst must be valid for 32/16 bytes of read/write according to
++ /// the $load/$store fn, which may allow for unaligned reads/writes or require
++ /// alignment to either 16x8 or u8x16.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u16, dst: *mut u8) -> bool {
+ let first = $load(src);
+ let second = $load(src.add(8));
+ if simd_is_basic_latin(first | second) {
+ $store(dst, simd_pack(first, second));
+ true
+ } else {
+ false
+ }
+ }
+ };
+ }
+
+ #[allow(unused_macros)]
+ macro_rules! pack_simd_stride {
++ // Safety: load/store must be valid for 16 bytes of read/write, which may be unaligned. (candidates: `(load|store)(16|8)_(unaligned|aligned)` functions)
+ ($name:ident, $load:ident, $store:ident) => {
++ /// Safety: src and dst must be valid for 32/16 bytes of read/write according to
++ /// the $load/$store fn, which may allow for unaligned reads/writes or require
++ /// alignment to either 16x8 or u8x16.
+ #[inline(always)]
+ pub unsafe fn $name(src: *const u16, dst: *mut u8) {
+ let first = $load(src);
+ let second = $load(src.add(8));
+ $store(dst, simd_pack(first, second));
+ }
+ };
+ }
+@@ -888,24 +1123,28 @@ cfg_if! {
+ // pub const ALIGNMENT: usize = 8;
+
+ pub const ALU_STRIDE_SIZE: usize = 16;
+
+ pub const ALU_ALIGNMENT: usize = 8;
+
+ pub const ALU_ALIGNMENT_MASK: usize = 7;
+
++ // Safety for stride macros: We stick to the load8_aligned/etc family of functions. We consistently produce
++ // neither_unaligned variants using only unaligned inputs.
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_neither_aligned, load16_unaligned, store16_unaligned);
+
+ ascii_to_basic_latin_simd_stride!(ascii_to_basic_latin_stride_neither_aligned, load16_unaligned, store8_unaligned);
+ unpack_simd_stride!(unpack_stride_neither_aligned, load16_unaligned, store8_unaligned);
+
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_neither_aligned, load8_unaligned, store16_unaligned);
+ pack_simd_stride!(pack_stride_neither_aligned, load8_unaligned, store16_unaligned);
+
++ // Safety for conversion macros: We use the unalign macro with unalign functions above. All stride functions were produced
++ // by stride macros that universally munch a single SIMD_STRIDE_SIZE worth of elements.
+ ascii_simd_unalign!(ascii_to_ascii, u8, u8, ascii_to_ascii_stride_neither_aligned);
+ ascii_simd_unalign!(ascii_to_basic_latin, u8, u16, ascii_to_basic_latin_stride_neither_aligned);
+ ascii_simd_unalign!(basic_latin_to_ascii, u16, u8, basic_latin_to_ascii_stride_neither_aligned);
+ latin1_simd_unalign!(unpack_latin1, u8, u16, unpack_stride_neither_aligned);
+ latin1_simd_unalign!(pack_latin1, u16, u8, pack_stride_neither_aligned);
+ } else if #[cfg(all(feature = "simd-accel", target_endian = "little", target_feature = "neon"))] {
+ // SIMD with different instructions for aligned and unaligned loads and stores.
+ //
+@@ -914,16 +1153,19 @@ cfg_if! {
+ // but the benchmark results I see don't agree.
+
+ pub const SIMD_STRIDE_SIZE: usize = 16;
+
+ pub const MAX_STRIDE_SIZE: usize = 16;
+
+ pub const SIMD_ALIGNMENT_MASK: usize = 15;
+
++ // Safety for stride macros: We stick to the load8_aligned/etc family of functions. We consistently name
++ // aligned/unaligned functions according to src/dst being aligned/unaligned
++
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_both_aligned, load16_aligned, store16_aligned);
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_src_aligned, load16_aligned, store16_unaligned);
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_dst_aligned, load16_unaligned, store16_aligned);
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_neither_aligned, load16_unaligned, store16_unaligned);
+
+ ascii_to_basic_latin_simd_stride!(ascii_to_basic_latin_stride_both_aligned, load16_aligned, store8_aligned);
+ ascii_to_basic_latin_simd_stride!(ascii_to_basic_latin_stride_src_aligned, load16_aligned, store8_unaligned);
+ ascii_to_basic_latin_simd_stride!(ascii_to_basic_latin_stride_dst_aligned, load16_unaligned, store8_aligned);
+@@ -939,36 +1181,43 @@ cfg_if! {
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_dst_aligned, load8_unaligned, store16_aligned);
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_neither_aligned, load8_unaligned, store16_unaligned);
+
+ pack_simd_stride!(pack_stride_both_aligned, load8_aligned, store16_aligned);
+ pack_simd_stride!(pack_stride_src_aligned, load8_aligned, store16_unaligned);
+ pack_simd_stride!(pack_stride_dst_aligned, load8_unaligned, store16_aligned);
+ pack_simd_stride!(pack_stride_neither_aligned, load8_unaligned, store16_unaligned);
+
++ // Safety for conversion macros: We use the correct pattern of both/src/dst/neither here. All stride functions were produced
++ // by stride macros that universally munch a single SIMD_STRIDE_SIZE worth of elements.
++
+ ascii_simd_check_align!(ascii_to_ascii, u8, u8, ascii_to_ascii_stride_both_aligned, ascii_to_ascii_stride_src_aligned, ascii_to_ascii_stride_dst_aligned, ascii_to_ascii_stride_neither_aligned);
+ ascii_simd_check_align!(ascii_to_basic_latin, u8, u16, ascii_to_basic_latin_stride_both_aligned, ascii_to_basic_latin_stride_src_aligned, ascii_to_basic_latin_stride_dst_aligned, ascii_to_basic_latin_stride_neither_aligned);
+ ascii_simd_check_align!(basic_latin_to_ascii, u16, u8, basic_latin_to_ascii_stride_both_aligned, basic_latin_to_ascii_stride_src_aligned, basic_latin_to_ascii_stride_dst_aligned, basic_latin_to_ascii_stride_neither_aligned);
+ latin1_simd_check_align!(unpack_latin1, u8, u16, unpack_stride_both_aligned, unpack_stride_src_aligned, unpack_stride_dst_aligned, unpack_stride_neither_aligned);
+ latin1_simd_check_align!(pack_latin1, u16, u8, pack_stride_both_aligned, pack_stride_src_aligned, pack_stride_dst_aligned, pack_stride_neither_aligned);
+ } else if #[cfg(all(feature = "simd-accel", target_feature = "sse2"))] {
+ // SIMD with different instructions for aligned and unaligned loads and stores.
+ //
+ // Newer microarchitectures are not supposed to have a performance difference between
+ // aligned and unaligned SSE2 loads and stores when the address is actually aligned,
+ // but the benchmark results I see don't agree.
+
+ pub const SIMD_STRIDE_SIZE: usize = 16;
+
++ /// Safety-usable invariant: This should be identical to SIMD_STRIDE_SIZE (used by ascii_simd_check_align_unrolled)
+ pub const SIMD_ALIGNMENT: usize = 16;
+
+ pub const MAX_STRIDE_SIZE: usize = 16;
+
+ pub const SIMD_ALIGNMENT_MASK: usize = 15;
+
++ // Safety for stride macros: We stick to the load8_aligned/etc family of functions. We consistently name
++ // aligned/unaligned functions according to src/dst being aligned/unaligned
++
+ ascii_to_ascii_simd_double_stride!(ascii_to_ascii_simd_double_stride_both_aligned, store16_aligned);
+ ascii_to_ascii_simd_double_stride!(ascii_to_ascii_simd_double_stride_src_aligned, store16_unaligned);
+
+ ascii_to_basic_latin_simd_double_stride!(ascii_to_basic_latin_simd_double_stride_both_aligned, store8_aligned);
+ ascii_to_basic_latin_simd_double_stride!(ascii_to_basic_latin_simd_double_stride_src_aligned, store8_unaligned);
+
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_both_aligned, load16_aligned, store16_aligned);
+ ascii_to_ascii_simd_stride!(ascii_to_ascii_stride_src_aligned, load16_aligned, store16_unaligned);
+@@ -984,33 +1233,43 @@ cfg_if! {
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_both_aligned, load8_aligned, store16_aligned);
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_src_aligned, load8_aligned, store16_unaligned);
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_dst_aligned, load8_unaligned, store16_aligned);
+ basic_latin_to_ascii_simd_stride!(basic_latin_to_ascii_stride_neither_aligned, load8_unaligned, store16_unaligned);
+
+ pack_simd_stride!(pack_stride_both_aligned, load8_aligned, store16_aligned);
+ pack_simd_stride!(pack_stride_src_aligned, load8_aligned, store16_unaligned);
+
++ // Safety for conversion macros: We use the correct pattern of both/src/dst/neither/double_both/double_src here. All stride functions were produced
++ // by stride macros that universally munch a single SIMD_STRIDE_SIZE worth of elements.
++
+ ascii_simd_check_align_unrolled!(ascii_to_ascii, u8, u8, ascii_to_ascii_stride_both_aligned, ascii_to_ascii_stride_src_aligned, ascii_to_ascii_stride_neither_aligned, ascii_to_ascii_simd_double_stride_both_aligned, ascii_to_ascii_simd_double_stride_src_aligned);
+ ascii_simd_check_align_unrolled!(ascii_to_basic_latin, u8, u16, ascii_to_basic_latin_stride_both_aligned, ascii_to_basic_latin_stride_src_aligned, ascii_to_basic_latin_stride_neither_aligned, ascii_to_basic_latin_simd_double_stride_both_aligned, ascii_to_basic_latin_simd_double_stride_src_aligned);
+
+ ascii_simd_check_align!(basic_latin_to_ascii, u16, u8, basic_latin_to_ascii_stride_both_aligned, basic_latin_to_ascii_stride_src_aligned, basic_latin_to_ascii_stride_dst_aligned, basic_latin_to_ascii_stride_neither_aligned);
+ latin1_simd_check_align_unrolled!(unpack_latin1, u8, u16, unpack_stride_both_aligned, unpack_stride_src_aligned, unpack_stride_dst_aligned, unpack_stride_neither_aligned);
+ latin1_simd_check_align_unrolled!(pack_latin1, u16, u8, pack_stride_both_aligned, pack_stride_src_aligned, pack_stride_dst_aligned, pack_stride_neither_aligned);
+ } else if #[cfg(all(target_endian = "little", target_pointer_width = "64"))] {
+ // Aligned ALU word, little-endian, 64-bit
+
++ /// Safety invariant: this is the amount of bytes consumed by
++ /// unpack_alu. This will be twice the pointer width, as it consumes two usizes.
++ /// This is also the number of bytes produced by pack_alu.
++ /// This is also the number of u16 code units produced/consumed by unpack_alu/pack_alu respectively.
+ pub const ALU_STRIDE_SIZE: usize = 16;
+
+ pub const MAX_STRIDE_SIZE: usize = 16;
+
++ // Safety invariant: this is the pointer width in bytes
+ pub const ALU_ALIGNMENT: usize = 8;
+
++ // Safety invariant: this is a mask for getting the bits of a pointer not aligned to ALU_ALIGNMENT
+ pub const ALU_ALIGNMENT_MASK: usize = 7;
+
++ /// Safety: dst must point to valid space for writing four `usize`s
+ #[inline(always)]
+ unsafe fn unpack_alu(word: usize, second_word: usize, dst: *mut usize) {
+ let first = ((0x0000_0000_FF00_0000usize & word) << 24) |
+ ((0x0000_0000_00FF_0000usize & word) << 16) |
+ ((0x0000_0000_0000_FF00usize & word) << 8) |
+ (0x0000_0000_0000_00FFusize & word);
+ let second = ((0xFF00_0000_0000_0000usize & word) >> 8) |
+ ((0x00FF_0000_0000_0000usize & word) >> 16) |
+@@ -1019,22 +1278,24 @@ cfg_if! {
+ let third = ((0x0000_0000_FF00_0000usize & second_word) << 24) |
+ ((0x0000_0000_00FF_0000usize & second_word) << 16) |
+ ((0x0000_0000_0000_FF00usize & second_word) << 8) |
+ (0x0000_0000_0000_00FFusize & second_word);
+ let fourth = ((0xFF00_0000_0000_0000usize & second_word) >> 8) |
+ ((0x00FF_0000_0000_0000usize & second_word) >> 16) |
+ ((0x0000_FF00_0000_0000usize & second_word) >> 24) |
+ ((0x0000_00FF_0000_0000usize & second_word) >> 32);
++ // Safety: fn invariant used here
+ *dst = first;
+ *(dst.add(1)) = second;
+ *(dst.add(2)) = third;
+ *(dst.add(3)) = fourth;
+ }
+
++ /// Safety: dst must point to valid space for writing two `usize`s
+ #[inline(always)]
+ unsafe fn pack_alu(first: usize, second: usize, third: usize, fourth: usize, dst: *mut usize) {
+ let word = ((0x00FF_0000_0000_0000usize & second) << 8) |
+ ((0x0000_00FF_0000_0000usize & second) << 16) |
+ ((0x0000_0000_00FF_0000usize & second) << 24) |
+ ((0x0000_0000_0000_00FFusize & second) << 32) |
+ ((0x00FF_0000_0000_0000usize & first) >> 24) |
+ ((0x0000_00FF_0000_0000usize & first) >> 16) |
+@@ -1043,70 +1304,88 @@ cfg_if! {
+ let second_word = ((0x00FF_0000_0000_0000usize & fourth) << 8) |
+ ((0x0000_00FF_0000_0000usize & fourth) << 16) |
+ ((0x0000_0000_00FF_0000usize & fourth) << 24) |
+ ((0x0000_0000_0000_00FFusize & fourth) << 32) |
+ ((0x00FF_0000_0000_0000usize & third) >> 24) |
+ ((0x0000_00FF_0000_0000usize & third) >> 16) |
+ ((0x0000_0000_00FF_0000usize & third) >> 8) |
+ (0x0000_0000_0000_00FFusize & third);
++ // Safety: fn invariant used here
+ *dst = word;
+ *(dst.add(1)) = second_word;
+ }
+ } else if #[cfg(all(target_endian = "little", target_pointer_width = "32"))] {
+ // Aligned ALU word, little-endian, 32-bit
+
++ /// Safety invariant: this is the amount of bytes consumed by
++ /// unpack_alu. This will be twice the pointer width, as it consumes two usizes.
++ /// This is also the number of bytes produced by pack_alu.
++ /// This is also the number of u16 code units produced/consumed by unpack_alu/pack_alu respectively.
+ pub const ALU_STRIDE_SIZE: usize = 8;
+
+ pub const MAX_STRIDE_SIZE: usize = 8;
+
++ // Safety invariant: this is the pointer width in bytes
+ pub const ALU_ALIGNMENT: usize = 4;
+
++ // Safety invariant: this is a mask for getting the bits of a pointer not aligned to ALU_ALIGNMENT
+ pub const ALU_ALIGNMENT_MASK: usize = 3;
+
++ /// Safety: dst must point to valid space for writing four `usize`s
+ #[inline(always)]
+ unsafe fn unpack_alu(word: usize, second_word: usize, dst: *mut usize) {
+ let first = ((0x0000_FF00usize & word) << 8) |
+ (0x0000_00FFusize & word);
+ let second = ((0xFF00_0000usize & word) >> 8) |
+ ((0x00FF_0000usize & word) >> 16);
+ let third = ((0x0000_FF00usize & second_word) << 8) |
+ (0x0000_00FFusize & second_word);
+ let fourth = ((0xFF00_0000usize & second_word) >> 8) |
+ ((0x00FF_0000usize & second_word) >> 16);
++ // Safety: fn invariant used here
+ *dst = first;
+ *(dst.add(1)) = second;
+ *(dst.add(2)) = third;
+ *(dst.add(3)) = fourth;
+ }
+
++ /// Safety: dst must point to valid space for writing two `usize`s
+ #[inline(always)]
+ unsafe fn pack_alu(first: usize, second: usize, third: usize, fourth: usize, dst: *mut usize) {
+ let word = ((0x00FF_0000usize & second) << 8) |
+ ((0x0000_00FFusize & second) << 16) |
+ ((0x00FF_0000usize & first) >> 8) |
+ (0x0000_00FFusize & first);
+ let second_word = ((0x00FF_0000usize & fourth) << 8) |
+ ((0x0000_00FFusize & fourth) << 16) |
+ ((0x00FF_0000usize & third) >> 8) |
+ (0x0000_00FFusize & third);
++ // Safety: fn invariant used here
+ *dst = word;
+ *(dst.add(1)) = second_word;
+ }
+ } else if #[cfg(all(target_endian = "big", target_pointer_width = "64"))] {
+ // Aligned ALU word, big-endian, 64-bit
+
++ /// Safety invariant: this is the amount of bytes consumed by
++ /// unpack_alu. This will be twice the pointer width, as it consumes two usizes.
++ /// This is also the number of bytes produced by pack_alu.
++ /// This is also the number of u16 code units produced/consumed by unpack_alu/pack_alu respectively.
+ pub const ALU_STRIDE_SIZE: usize = 16;
+
+ pub const MAX_STRIDE_SIZE: usize = 16;
+
++ // Safety invariant: this is the pointer width in bytes
+ pub const ALU_ALIGNMENT: usize = 8;
+
++ // Safety invariant: this is a mask for getting the bits of a pointer not aligned to ALU_ALIGNMENT
+ pub const ALU_ALIGNMENT_MASK: usize = 7;
+
++ /// Safety: dst must point to valid space for writing four `usize`s
+ #[inline(always)]
+ unsafe fn unpack_alu(word: usize, second_word: usize, dst: *mut usize) {
+ let first = ((0xFF00_0000_0000_0000usize & word) >> 8) |
+ ((0x00FF_0000_0000_0000usize & word) >> 16) |
+ ((0x0000_FF00_0000_0000usize & word) >> 24) |
+ ((0x0000_00FF_0000_0000usize & word) >> 32);
+ let second = ((0x0000_0000_FF00_0000usize & word) << 24) |
+ ((0x0000_0000_00FF_0000usize & word) << 16) |
+@@ -1115,22 +1394,24 @@ cfg_if! {
+ let third = ((0xFF00_0000_0000_0000usize & second_word) >> 8) |
+ ((0x00FF_0000_0000_0000usize & second_word) >> 16) |
+ ((0x0000_FF00_0000_0000usize & second_word) >> 24) |
+ ((0x0000_00FF_0000_0000usize & second_word) >> 32);
+ let fourth = ((0x0000_0000_FF00_0000usize & second_word) << 24) |
+ ((0x0000_0000_00FF_0000usize & second_word) << 16) |
+ ((0x0000_0000_0000_FF00usize & second_word) << 8) |
+ (0x0000_0000_0000_00FFusize & second_word);
++ // Safety: fn invariant used here
+ *dst = first;
+ *(dst.add(1)) = second;
+ *(dst.add(2)) = third;
+ *(dst.add(3)) = fourth;
+ }
+
++ /// Safety: dst must point to valid space for writing two `usize`s
+ #[inline(always)]
+ unsafe fn pack_alu(first: usize, second: usize, third: usize, fourth: usize, dst: *mut usize) {
+ let word = ((0x00FF0000_00000000usize & first) << 8) |
+ ((0x000000FF_00000000usize & first) << 16) |
+ ((0x00000000_00FF0000usize & first) << 24) |
+ ((0x00000000_000000FFusize & first) << 32) |
+ ((0x00FF0000_00000000usize & second) >> 24) |
+ ((0x000000FF_00000000usize & second) >> 16) |
+@@ -1139,67 +1420,80 @@ cfg_if! {
+ let second_word = ((0x00FF0000_00000000usize & third) << 8) |
+ ((0x000000FF_00000000usize & third) << 16) |
+ ((0x00000000_00FF0000usize & third) << 24) |
+ ((0x00000000_000000FFusize & third) << 32) |
+ ((0x00FF0000_00000000usize & fourth) >> 24) |
+ ((0x000000FF_00000000usize & fourth) >> 16) |
+ ((0x00000000_00FF0000usize & fourth) >> 8) |
+ (0x00000000_000000FFusize & fourth);
++ // Safety: fn invariant used here
+ *dst = word;
+ *(dst.add(1)) = second_word;
+ }
+ } else if #[cfg(all(target_endian = "big", target_pointer_width = "32"))] {
+ // Aligned ALU word, big-endian, 32-bit
+
++ /// Safety invariant: this is the amount of bytes consumed by
++ /// unpack_alu. This will be twice the pointer width, as it consumes two usizes.
++ /// This is also the number of bytes produced by pack_alu.
++ /// This is also the number of u16 code units produced/consumed by unpack_alu/pack_alu respectively.
+ pub const ALU_STRIDE_SIZE: usize = 8;
+
+ pub const MAX_STRIDE_SIZE: usize = 8;
+
++ // Safety invariant: this is the pointer width in bytes
+ pub const ALU_ALIGNMENT: usize = 4;
+
++ // Safety invariant: this is a mask for getting the bits of a pointer not aligned to ALU_ALIGNMENT
+ pub const ALU_ALIGNMENT_MASK: usize = 3;
+
++ /// Safety: dst must point to valid space for writing four `usize`s
+ #[inline(always)]
+ unsafe fn unpack_alu(word: usize, second_word: usize, dst: *mut usize) {
+ let first = ((0xFF00_0000usize & word) >> 8) |
+ ((0x00FF_0000usize & word) >> 16);
+ let second = ((0x0000_FF00usize & word) << 8) |
+ (0x0000_00FFusize & word);
+ let third = ((0xFF00_0000usize & second_word) >> 8) |
+ ((0x00FF_0000usize & second_word) >> 16);
+ let fourth = ((0x0000_FF00usize & second_word) << 8) |
+ (0x0000_00FFusize & second_word);
++ // Safety: fn invariant used here
+ *dst = first;
+ *(dst.add(1)) = second;
+ *(dst.add(2)) = third;
+ *(dst.add(3)) = fourth;
+ }
+
++ /// Safety: dst must point to valid space for writing two `usize`s
+ #[inline(always)]
+ unsafe fn pack_alu(first: usize, second: usize, third: usize, fourth: usize, dst: *mut usize) {
+ let word = ((0x00FF_0000usize & first) << 8) |
+ ((0x0000_00FFusize & first) << 16) |
+ ((0x00FF_0000usize & second) >> 8) |
+ (0x0000_00FFusize & second);
+ let second_word = ((0x00FF_0000usize & third) << 8) |
+ ((0x0000_00FFusize & third) << 16) |
+ ((0x00FF_0000usize & fourth) >> 8) |
+ (0x0000_00FFusize & fourth);
++ // Safety: fn invariant used here
+ *dst = word;
+ *(dst.add(1)) = second_word;
+ }
+ } else {
+ ascii_naive!(ascii_to_ascii, u8, u8);
+ ascii_naive!(ascii_to_basic_latin, u8, u16);
+ ascii_naive!(basic_latin_to_ascii, u16, u8);
+ }
+ }
+
+ cfg_if! {
++ // Safety-usable invariant: this counts the zeroes from the "first byte" of utf-8 data packed into a usize
++ // with the target endianness
+ if #[cfg(target_endian = "little")] {
+ #[allow(dead_code)]
+ #[inline(always)]
+ fn count_zeros(word: usize) -> u32 {
+ word.trailing_zeros()
+ }
+ } else {
+ #[allow(dead_code)]
+@@ -1207,208 +1501,272 @@ cfg_if! {
+ fn count_zeros(word: usize) -> u32 {
+ word.leading_zeros()
+ }
+ }
+ }
+
+ cfg_if! {
+ if #[cfg(all(feature = "simd-accel", target_endian = "little", target_arch = "disabled"))] {
++ /// Safety-usable invariant: Will return the value and position of the first non-ASCII byte in the slice in a Some if found.
++ /// In other words, the first element of the Some is always `> 127`
+ #[inline(always)]
+ pub fn validate_ascii(slice: &[u8]) -> Option<(u8, usize)> {
+ let src = slice.as_ptr();
+ let len = slice.len();
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading/writing at least `stride` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
+ loop {
++ // Safety: src at offset is valid for a `SIMD_STRIDE_SIZE` read
+ let simd = unsafe { load16_unaligned(src.add(offset)) };
+ if !simd_is_ascii(simd) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // This is `offset > len - SIMD_STRIDE_SIZE` which means we always have at least `SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ while offset < len {
+ let code_unit = slice[offset];
+ if code_unit > 127 {
++ // Safety: Safety-usable invariant upheld here
+ return Some((code_unit, offset));
+ }
+ offset += 1;
+ }
+ None
+ }
+ } else if #[cfg(all(feature = "simd-accel", target_feature = "sse2"))] {
++ /// Safety-usable invariant: will return Some() when it encounters non-ASCII, with the first element in the Some being
++ /// guaranteed to be non-ASCII (> 127), and the second being the offset where it is found
+ #[inline(always)]
+ pub fn validate_ascii(slice: &[u8]) -> Option<(u8, usize)> {
+ let src = slice.as_ptr();
+ let len = slice.len();
+ let mut offset = 0usize;
++ // Safety: if this check succeeds we're valid for reading at least `stride` elements.
+ if SIMD_STRIDE_SIZE <= len {
+ // First, process one unaligned vector
++ // Safety: src is valid for a `SIMD_STRIDE_SIZE` read
+ let simd = unsafe { load16_unaligned(src) };
+ let mask = mask_ascii(simd);
+ if mask != 0 {
+ offset = mask.trailing_zeros() as usize;
+ let non_ascii = unsafe { *src.add(offset) };
+ return Some((non_ascii, offset));
+ }
+ offset = SIMD_STRIDE_SIZE;
++ // Safety: Now that offset has changed we don't yet know how much it is valid for
+
+ // We have now seen 16 ASCII bytes. Let's guess that
+ // there will be enough more to justify more expense
+ // in the case of non-ASCII.
+ // Use aligned reads for the sake of old microachitectures.
++ // Safety: this correctly calculates the number of src_units that need to be read before the remaining list is aligned.
++ // This is by definition less than SIMD_ALIGNMENT, which is defined to be equal to SIMD_STRIDE_SIZE.
+ let until_alignment = unsafe { (SIMD_ALIGNMENT - ((src.add(offset) as usize) & SIMD_ALIGNMENT_MASK)) & SIMD_ALIGNMENT_MASK };
+ // This addition won't overflow, because even in the 32-bit PAE case the
+ // address space holds enough code that the slice length can't be that
+ // close to address space size.
+ // offset now equals SIMD_STRIDE_SIZE, hence times 3 below.
++ //
++ // Safety: if this check succeeds we're valid for reading at least `2 * SIMD_STRIDE_SIZE` elements plus `until_alignment`.
++ // The extra SIMD_STRIDE_SIZE in the condition is because `offset` is already `SIMD_STRIDE_SIZE`.
+ if until_alignment + (SIMD_STRIDE_SIZE * 3) <= len {
+ if until_alignment != 0 {
++ // Safety: this is safe to call since we're valid for this read (and more), and don't care about alignment
++ // This will copy over bytes that get decoded twice since it's not incrementing `offset` by SIMD_STRIDE_SIZE. This is fine.
+ let simd = unsafe { load16_unaligned(src.add(offset)) };
+ let mask = mask_ascii(simd);
+ if mask != 0 {
+ offset += mask.trailing_zeros() as usize;
+ let non_ascii = unsafe { *src.add(offset) };
+ return Some((non_ascii, offset));
+ }
+ offset += until_alignment;
+ }
++ // Safety: At this point we're valid for reading 2*SIMD_STRIDE_SIZE elements
++ // Safety: Now `offset` is aligned for `src`
+ let len_minus_stride_times_two = len - (SIMD_STRIDE_SIZE * 2);
+ loop {
++ // Safety: We were valid for this read, and were aligned.
+ let first = unsafe { load16_aligned(src.add(offset)) };
+ let second = unsafe { load16_aligned(src.add(offset + SIMD_STRIDE_SIZE)) };
+ if !simd_is_ascii(first | second) {
++ // Safety: mask_ascii produces a mask of all the high bits.
+ let mask_first = mask_ascii(first);
+ if mask_first != 0 {
++ // Safety: on little endian systems this will be the number of ascii bytes
++ // before the first non-ascii, i.e. valid for indexing src
++ // TODO SAFETY: What about big-endian systems?
+ offset += mask_first.trailing_zeros() as usize;
+ } else {
+ let mask_second = mask_ascii(second);
++ // Safety: on little endian systems this will be the number of ascii bytes
++ // before the first non-ascii, i.e. valid for indexing src
+ offset += SIMD_STRIDE_SIZE + mask_second.trailing_zeros() as usize;
+ }
++ // Safety: We know this is non-ASCII, and can uphold the safety-usable invariant here
+ let non_ascii = unsafe { *src.add(offset) };
++
+ return Some((non_ascii, offset));
+ }
+ offset += SIMD_STRIDE_SIZE * 2;
++ // Safety: This is `offset > len - 2 * SIMD_STRIDE_SIZE` which means we always have at least `2 * SIMD_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride_times_two {
+ break;
+ }
+ }
++ // Safety: if this check succeeds we're valid for reading at least `SIMD_STRIDE_SIZE`
+ if offset + SIMD_STRIDE_SIZE <= len {
+- let simd = unsafe { load16_aligned(src.add(offset)) };
+- let mask = mask_ascii(simd);
++ // Safety: We were valid for this read, and were aligned.
++ let simd = unsafe { load16_aligned(src.add(offset)) };
++ // Safety: mask_ascii produces a mask of all the high bits.
++ let mask = mask_ascii(simd);
+ if mask != 0 {
++ // Safety: on little endian systems this will be the number of ascii bytes
++ // before the first non-ascii, i.e. valid for indexing src
+ offset += mask.trailing_zeros() as usize;
+ let non_ascii = unsafe { *src.add(offset) };
++ // Safety: We know this is non-ASCII, and can uphold the safety-usable invariant here
+ return Some((non_ascii, offset));
+ }
+ offset += SIMD_STRIDE_SIZE;
+ }
+ } else {
++ // Safety: this is the unaligned branch
+ // At most two iterations, so unroll
++ // Safety: if this check succeeds we're valid for reading at least `SIMD_STRIDE_SIZE`
+ if offset + SIMD_STRIDE_SIZE <= len {
++ // Safety: We're valid for this read but must use an unaligned read
+ let simd = unsafe { load16_unaligned(src.add(offset)) };
+ let mask = mask_ascii(simd);
+ if mask != 0 {
+ offset += mask.trailing_zeros() as usize;
+ let non_ascii = unsafe { *src.add(offset) };
++ // Safety-usable invariant upheld here (same as above)
+ return Some((non_ascii, offset));
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: if this check succeeds we're valid for reading at least `SIMD_STRIDE_SIZE`
+ if offset + SIMD_STRIDE_SIZE <= len {
++ // Safety: We're valid for this read but must use an unaligned read
+ let simd = unsafe { load16_unaligned(src.add(offset)) };
+ let mask = mask_ascii(simd);
+ if mask != 0 {
+ offset += mask.trailing_zeros() as usize;
+ let non_ascii = unsafe { *src.add(offset) };
++ // Safety-usable invariant upheld here (same as above)
+ return Some((non_ascii, offset));
+ }
+ offset += SIMD_STRIDE_SIZE;
+ }
+ }
+ }
+ }
+ while offset < len {
++ // Safety: relies straightforwardly on the `len` invariant
+ let code_unit = unsafe { *(src.add(offset)) };
+ if code_unit > 127 {
++ // Safety-usable invariant upheld here
+ return Some((code_unit, offset));
+ }
+ offset += 1;
+ }
+ None
+ }
+ } else {
++ // Safety-usable invariant: returns byte index of first non-ascii byte
+ #[inline(always)]
+ fn find_non_ascii(word: usize, second_word: usize) -> Option<usize> {
+ let word_masked = word & ASCII_MASK;
+ let second_masked = second_word & ASCII_MASK;
+ if (word_masked | second_masked) == 0 {
++ // Both are ascii, invariant upheld
+ return None;
+ }
+ if word_masked != 0 {
+ let zeros = count_zeros(word_masked);
+- // `zeros` now contains 7 (for the seven bits of non-ASCII)
++ // `zeros` now contains 0 to 7 (for the seven bits of masked ASCII in little endian,
++ // or up to 7 bits of non-ASCII in big endian if the first byte is non-ASCII)
+ // plus 8 times the number of ASCII in text order before the
+ // non-ASCII byte in the little-endian case or 8 times the number of ASCII in
+ // text order before the non-ASCII byte in the big-endian case.
+ let num_ascii = (zeros >> 3) as usize;
++ // Safety-usable invariant upheld here
+ return Some(num_ascii);
+ }
+ let zeros = count_zeros(second_masked);
+- // `zeros` now contains 7 (for the seven bits of non-ASCII)
++ // `zeros` now contains 0 to 7 (for the seven bits of masked ASCII in little endian,
++ // or up to 7 bits of non-ASCII in big endian if the first byte is non-ASCII)
+ // plus 8 times the number of ASCII in text order before the
+ // non-ASCII byte in the little-endian case or 8 times the number of ASCII in
+ // text order before the non-ASCII byte in the big-endian case.
+ let num_ascii = (zeros >> 3) as usize;
++ // Safety-usable invariant upheld here
+ Some(ALU_ALIGNMENT + num_ascii)
+ }
+
++ /// Safety: `src` must be valid for the reads of two `usize`s
++ ///
++ /// Safety-usable invariant: will return byte index of first non-ascii byte
+ #[inline(always)]
+ unsafe fn validate_ascii_stride(src: *const usize) -> Option<usize> {
+ let word = *src;
+ let second_word = *(src.add(1));
+ find_non_ascii(word, second_word)
+ }
+
++ /// Safety-usable invariant: will return Some() when it encounters non-ASCII, with the first element in the Some being
++ /// guaranteed to be non-ASCII (> 127), and the second being the offset where it is found
+ #[cfg_attr(feature = "cargo-clippy", allow(cast_ptr_alignment))]
+ #[inline(always)]
+ pub fn validate_ascii(slice: &[u8]) -> Option<(u8, usize)> {
+ let src = slice.as_ptr();
+ let len = slice.len();
+ let mut offset = 0usize;
+ let mut until_alignment = (ALU_ALIGNMENT - ((src as usize) & ALU_ALIGNMENT_MASK)) & ALU_ALIGNMENT_MASK;
++ // Safety: If this check fails we're valid to read `until_alignment + ALU_STRIDE_SIZE` elements
+ if until_alignment + ALU_STRIDE_SIZE <= len {
+ while until_alignment != 0 {
+ let code_unit = slice[offset];
+ if code_unit > 127 {
++ // Safety-usable invairant upheld here
+ return Some((code_unit, offset));
+ }
+ offset += 1;
+ until_alignment -= 1;
+ }
++ // Safety: At this point we have read until_alignment elements and
++ // are valid for `ALU_STRIDE_SIZE` more.
+ let len_minus_stride = len - ALU_STRIDE_SIZE;
+ loop {
++ // Safety: we were valid for this read
+ let ptr = unsafe { src.add(offset) as *const usize };
+ if let Some(num_ascii) = unsafe { validate_ascii_stride(ptr) } {
+ offset += num_ascii;
++ // Safety-usable invairant upheld here using the invariant from validate_ascii_stride()
+ return Some((unsafe { *(src.add(offset)) }, offset));
+ }
+ offset += ALU_STRIDE_SIZE;
++ // Safety: This is `offset > ALU_STRIDE_SIZE` which means we always have at least `2 * ALU_STRIDE_SIZE` elements to munch next time.
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ while offset < len {
+ let code_unit = slice[offset];
+ if code_unit > 127 {
++ // Safety-usable invairant upheld here
+ return Some((code_unit, offset));
+ }
+ offset += 1;
+ }
+ None
+ }
+
+ }
+@@ -1423,70 +1781,88 @@ cfg_if! {
+ // vector reads without vector writes.
+
+ pub const ALU_STRIDE_SIZE: usize = 8;
+
+ pub const ALU_ALIGNMENT: usize = 4;
+
+ pub const ALU_ALIGNMENT_MASK: usize = 3;
+ } else {
++ // Safety: src points to two valid `usize`s, dst points to four valid `usize`s
+ #[inline(always)]
+ unsafe fn unpack_latin1_stride_alu(src: *const usize, dst: *mut usize) {
++ // Safety: src safety invariant used here
+ let word = *src;
+ let second_word = *(src.add(1));
++ // Safety: dst safety invariant passed down
+ unpack_alu(word, second_word, dst);
+ }
+
++ // Safety: src points to four valid `usize`s, dst points to two valid `usize`s
+ #[inline(always)]
+ unsafe fn pack_latin1_stride_alu(src: *const usize, dst: *mut usize) {
++ // Safety: src safety invariant used here
+ let first = *src;
+ let second = *(src.add(1));
+ let third = *(src.add(2));
+ let fourth = *(src.add(3));
++ // Safety: dst safety invariant passed down
+ pack_alu(first, second, third, fourth, dst);
+ }
+
++ // Safety: src points to two valid `usize`s, dst points to four valid `usize`s
+ #[inline(always)]
+ unsafe fn ascii_to_basic_latin_stride_alu(src: *const usize, dst: *mut usize) -> bool {
++ // Safety: src safety invariant used here
+ let word = *src;
+ let second_word = *(src.add(1));
+ // Check if the words contains non-ASCII
+ if (word & ASCII_MASK) | (second_word & ASCII_MASK) != 0 {
+ return false;
+ }
++ // Safety: dst safety invariant passed down
+ unpack_alu(word, second_word, dst);
+ true
+ }
+
++ // Safety: src points four valid `usize`s, dst points to two valid `usize`s
+ #[inline(always)]
+ unsafe fn basic_latin_to_ascii_stride_alu(src: *const usize, dst: *mut usize) -> bool {
++ // Safety: src safety invariant used here
+ let first = *src;
+ let second = *(src.add(1));
+ let third = *(src.add(2));
+ let fourth = *(src.add(3));
+ if (first & BASIC_LATIN_MASK) | (second & BASIC_LATIN_MASK) | (third & BASIC_LATIN_MASK) | (fourth & BASIC_LATIN_MASK) != 0 {
+ return false;
+ }
++ // Safety: dst safety invariant passed down
+ pack_alu(first, second, third, fourth, dst);
+ true
+ }
+
++ // Safety: src, dst both point to two valid `usize`s each
++ // Safety-usable invariant: Will return byte index of first non-ascii byte.
+ #[inline(always)]
+ unsafe fn ascii_to_ascii_stride(src: *const usize, dst: *mut usize) -> Option<usize> {
++ // Safety: src safety invariant used here
+ let word = *src;
+ let second_word = *(src.add(1));
++ // Safety: src safety invariant used here
+ *dst = word;
+ *(dst.add(1)) = second_word;
++ // Relies on safety-usable invariant here
+ find_non_ascii(word, second_word)
+ }
+
+ basic_latin_alu!(ascii_to_basic_latin, u8, u16, ascii_to_basic_latin_stride_alu);
+ basic_latin_alu!(basic_latin_to_ascii, u16, u8, basic_latin_to_ascii_stride_alu);
+ latin1_alu!(unpack_latin1, u8, u16, unpack_latin1_stride_alu);
+ latin1_alu!(pack_latin1, u16, u8, pack_latin1_stride_alu);
++ // Safety invariant upheld: ascii_to_ascii_stride will return byte index of first non-ascii if found
+ ascii_alu!(ascii_to_ascii, u8, u8, ascii_to_ascii_stride);
+ }
+ }
+
+ pub fn ascii_valid_up_to(bytes: &[u8]) -> usize {
+ match validate_ascii(bytes) {
+ None => bytes.len(),
+ Some((_, num_valid)) => num_valid,
+diff --git a/third_party/rust/encoding_rs/src/handles.rs b/third_party/rust/encoding_rs/src/handles.rs
+--- third_party/rust/encoding_rs/src/handles.rs
++++ third_party/rust/encoding_rs/src/handles.rs
+@@ -29,17 +29,17 @@ use crate::simd_funcs::*;
+ #[cfg(all(
+ feature = "simd-accel",
+ any(
+ target_feature = "sse2",
+ all(target_endian = "little", target_arch = "aarch64"),
+ all(target_endian = "little", target_feature = "neon")
+ )
+ ))]
+-use packed_simd::u16x8;
++use core::simd::u16x8;
+
+ use super::DecoderResult;
+ use super::EncoderResult;
+ use crate::ascii::*;
+ use crate::utf_8::convert_utf8_to_utf16_up_to_invalid;
+ use crate::utf_8::utf8_valid_up_to;
+
+ pub enum Space<T> {
+@@ -85,84 +85,100 @@ impl Endian for LittleEndian {
+ const OPPOSITE_ENDIAN: bool = false;
+
+ #[cfg(target_endian = "big")]
+ const OPPOSITE_ENDIAN: bool = true;
+ }
+
+ #[derive(Debug, Copy, Clone)]
+ struct UnalignedU16Slice {
++ // Safety invariant: ptr must be valid for reading 2*len bytes
+ ptr: *const u8,
+ len: usize,
+ }
+
+ impl UnalignedU16Slice {
++ /// Safety: ptr must be valid for reading 2*len bytes
+ #[inline(always)]
+ pub unsafe fn new(ptr: *const u8, len: usize) -> UnalignedU16Slice {
++ // Safety: field invariant passed up to caller here
+ UnalignedU16Slice { ptr, len }
+ }
+
+ #[inline(always)]
+ pub fn trim_last(&mut self) {
+ assert!(self.len > 0);
++ // Safety: invariant upheld here: a slice is still valid with a shorter len
+ self.len -= 1;
+ }
+
+ #[inline(always)]
+ pub fn at(&self, i: usize) -> u16 {
+ use core::mem::MaybeUninit;
+
+ assert!(i < self.len);
+ unsafe {
+ let mut u: MaybeUninit<u16> = MaybeUninit::uninit();
++ // Safety: i is at most len - 1, which works here
+ ::core::ptr::copy_nonoverlapping(self.ptr.add(i * 2), u.as_mut_ptr() as *mut u8, 2);
++ // Safety: valid read above lets us do this
+ u.assume_init()
+ }
+ }
+
+ #[cfg(feature = "simd-accel")]
+ #[inline(always)]
+ pub fn simd_at(&self, i: usize) -> u16x8 {
++ // Safety: i/len are on the scale of u16s, each one corresponds to 2 u8s
+ assert!(i + SIMD_STRIDE_SIZE / 2 <= self.len);
+ let byte_index = i * 2;
++ // Safety: load16_unaligned needs SIMD_STRIDE_SIZE=16 u8 elements to read,
++ // or 16/2 = 8 u16 elements to read.
++ // We have checked that we have at least that many above.
++
+ unsafe { to_u16_lanes(load16_unaligned(self.ptr.add(byte_index))) }
+ }
+
+ #[inline(always)]
+ pub fn len(&self) -> usize {
+ self.len
+ }
+
+ #[inline(always)]
+ pub fn tail(&self, from: usize) -> UnalignedU16Slice {
+ // XXX the return value should be restricted not to
+ // outlive self.
+ assert!(from <= self.len);
++ // Safety: This upholds the same invariant: `from` is in bounds and we're returning a shorter slice
+ unsafe { UnalignedU16Slice::new(self.ptr.add(from * 2), self.len - from) }
+ }
+
+ #[cfg(feature = "simd-accel")]
+ #[inline(always)]
+ pub fn copy_bmp_to<E: Endian>(&self, other: &mut [u16]) -> Option<(u16, usize)> {
+ assert!(self.len <= other.len());
+ let mut offset = 0;
++ // Safety: SIMD_STRIDE_SIZE is measured in bytes, whereas len is in u16s. We check we can
++ // munch SIMD_STRIDE_SIZE / 2 u16s which means we can write SIMD_STRIDE_SIZE u8s
+ if SIMD_STRIDE_SIZE / 2 <= self.len {
+ let len_minus_stride = self.len - SIMD_STRIDE_SIZE / 2;
+ loop {
+ let mut simd = self.simd_at(offset);
+ if E::OPPOSITE_ENDIAN {
+ simd = simd_byte_swap(simd);
+ }
++ // Safety: we have enough space on the other side to write this
+ unsafe {
+ store8_unaligned(other.as_mut_ptr().add(offset), simd);
+ }
+ if contains_surrogates(simd) {
+ break;
+ }
+ offset += SIMD_STRIDE_SIZE / 2;
++ // Safety: This ensures we still have space for writing SIMD_STRIDE_SIZE u8s
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ while offset < self.len {
+ let unit = swap_if_opposite_endian::<E>(self.at(offset));
+ other[offset] = unit;
+@@ -231,33 +247,37 @@ fn copy_unaligned_basic_latin_to_ascii<E
+ #[cfg(feature = "simd-accel")]
+ #[inline(always)]
+ fn copy_unaligned_basic_latin_to_ascii<E: Endian>(
+ src: UnalignedU16Slice,
+ dst: &mut [u8],
+ ) -> CopyAsciiResult<usize, (u16, usize)> {
+ let len = ::core::cmp::min(src.len(), dst.len());
+ let mut offset = 0;
++ // Safety: This check ensures we are able to read/write at least SIMD_STRIDE_SIZE elements
+ if SIMD_STRIDE_SIZE <= len {
+ let len_minus_stride = len - SIMD_STRIDE_SIZE;
+ loop {
+ let mut first = src.simd_at(offset);
+ let mut second = src.simd_at(offset + (SIMD_STRIDE_SIZE / 2));
+ if E::OPPOSITE_ENDIAN {
+ first = simd_byte_swap(first);
+ second = simd_byte_swap(second);
+ }
+ if !simd_is_basic_latin(first | second) {
+ break;
+ }
+ let packed = simd_pack(first, second);
++ // Safety: We are able to write SIMD_STRIDE_SIZE elements in this iteration
+ unsafe {
+ store16_unaligned(dst.as_mut_ptr().add(offset), packed);
+ }
+ offset += SIMD_STRIDE_SIZE;
++ // Safety: This is `offset > len - SIMD_STRIDE_SIZE`, which ensures that we can write at least SIMD_STRIDE_SIZE elements
++ // in the next iteration
+ if offset > len_minus_stride {
+ break;
+ }
+ }
+ }
+ copy_unaligned_basic_latin_to_ascii_alu::<E>(src.tail(offset), &mut dst[offset..], offset)
+ }
+
+@@ -632,94 +652,106 @@ impl<'a> Utf16Destination<'a> {
+ #[inline(always)]
+ fn write_astral(&mut self, astral: u32) {
+ debug_assert!(astral > 0xFFFF);
+ debug_assert!(astral <= 0x10_FFFF);
+ self.write_code_unit((0xD7C0 + (astral >> 10)) as u16);
+ self.write_code_unit((0xDC00 + (astral & 0x3FF)) as u16);
+ }
+ #[inline(always)]
+- pub fn write_surrogate_pair(&mut self, high: u16, low: u16) {
++ fn write_surrogate_pair(&mut self, high: u16, low: u16) {
+ self.write_code_unit(high);
+ self.write_code_unit(low);
+ }
+ #[inline(always)]
+ fn write_big5_combination(&mut self, combined: u16, combining: u16) {
+ self.write_bmp_excl_ascii(combined);
+ self.write_bmp_excl_ascii(combining);
+ }
++ // Safety-usable invariant: CopyAsciiResult::GoOn will only contain bytes >=0x80
+ #[inline(always)]
+ pub fn copy_ascii_from_check_space_bmp<'b>(
+ &'b mut self,
+ source: &mut ByteSource,
+ ) -> CopyAsciiResult<(DecoderResult, usize, usize), (u8, Utf16BmpHandle<'b, 'a>)> {
+ let non_ascii_ret = {
+ let src_remaining = &source.slice[source.pos..];
+ let dst_remaining = &mut self.slice[self.pos..];
+ let (pending, length) = if dst_remaining.len() < src_remaining.len() {
+ (DecoderResult::OutputFull, dst_remaining.len())
+ } else {
+ (DecoderResult::InputEmpty, src_remaining.len())
+ };
++ // Safety: This function is documented as needing valid pointers for src/dest and len, which
++ // is true since we've passed the minumum length of the two
+ match unsafe {
+ ascii_to_basic_latin(src_remaining.as_ptr(), dst_remaining.as_mut_ptr(), length)
+ } {
+ None => {
+ source.pos += length;
+ self.pos += length;
+ return CopyAsciiResult::Stop((pending, source.pos, self.pos));
+ }
++ // Safety: the function is documented as returning bytes >=0x80 in the Some
+ Some((non_ascii, consumed)) => {
+ source.pos += consumed;
+ self.pos += consumed;
+ source.pos += 1; // +1 for non_ascii
++ // Safety: non-ascii bubbled out here
+ non_ascii
+ }
+ }
+ };
++ // Safety: non-ascii returned here
+ CopyAsciiResult::GoOn((non_ascii_ret, Utf16BmpHandle::new(self)))
+ }
++ // Safety-usable invariant: CopyAsciiResult::GoOn will only contain bytes >=0x80
+ #[inline(always)]
+ pub fn copy_ascii_from_check_space_astral<'b>(
+ &'b mut self,
+ source: &mut ByteSource,
+ ) -> CopyAsciiResult<(DecoderResult, usize, usize), (u8, Utf16AstralHandle<'b, 'a>)> {
+ let non_ascii_ret = {
+ let dst_len = self.slice.len();
+ let src_remaining = &source.slice[source.pos..];
+ let dst_remaining = &mut self.slice[self.pos..];
+ let (pending, length) = if dst_remaining.len() < src_remaining.len() {
+ (DecoderResult::OutputFull, dst_remaining.len())
+ } else {
+ (DecoderResult::InputEmpty, src_remaining.len())
+ };
++ // Safety: This function is documented as needing valid pointers for src/dest and len, which
++ // is true since we've passed the minumum length of the two
+ match unsafe {
+ ascii_to_basic_latin(src_remaining.as_ptr(), dst_remaining.as_mut_ptr(), length)
+ } {
+ None => {
+ source.pos += length;
+ self.pos += length;
+ return CopyAsciiResult::Stop((pending, source.pos, self.pos));
+ }
++ // Safety: the function is documented as returning bytes >=0x80 in the Some
+ Some((non_ascii, consumed)) => {
+ source.pos += consumed;
+ self.pos += consumed;
+ if self.pos + 1 < dst_len {
+ source.pos += 1; // +1 for non_ascii
++ // Safety: non-ascii bubbled out here
+ non_ascii
+ } else {
+ return CopyAsciiResult::Stop((
+ DecoderResult::OutputFull,
+ source.pos,
+ self.pos,
+ ));
+ }
+ }
+ }
+ };
++ // Safety: non-ascii returned here
+ CopyAsciiResult::GoOn((non_ascii_ret, Utf16AstralHandle::new(self)))
+ }
+ #[inline(always)]
+ pub fn copy_utf8_up_to_invalid_from(&mut self, source: &mut ByteSource) {
+ let src_remaining = &source.slice[source.pos..];
+ let dst_remaining = &mut self.slice[self.pos..];
+ let (read, written) = convert_utf8_to_utf16_up_to_invalid(src_remaining, dst_remaining);
+ source.pos += read;
+diff --git a/third_party/rust/encoding_rs/src/lib.rs b/third_party/rust/encoding_rs/src/lib.rs
+--- third_party/rust/encoding_rs/src/lib.rs
++++ third_party/rust/encoding_rs/src/lib.rs
+@@ -684,37 +684,26 @@
+ //! <tr><td>TIS-620</td><td>windows-874</td></tr>
+ //! </tbody>
+ //! </table>
+ //!
+ //! See the section [_UTF-16LE, UTF-16BE and Unicode Encoding Schemes_](#utf-16le-utf-16be-and-unicode-encoding-schemes)
+ //! for discussion about the UTF-16 family.
+
+ #![no_std]
+-#![cfg_attr(feature = "simd-accel", feature(core_intrinsics))]
++#![cfg_attr(feature = "simd-accel", feature(core_intrinsics, portable_simd))]
+
+ #[cfg(feature = "alloc")]
+ #[cfg_attr(test, macro_use)]
+ extern crate alloc;
+
+ extern crate core;
+ #[macro_use]
+ extern crate cfg_if;
+
+-#[cfg(all(
+- feature = "simd-accel",
+- any(
+- target_feature = "sse2",
+- all(target_endian = "little", target_arch = "aarch64"),
+- all(target_endian = "little", target_feature = "neon")
+- )
+-))]
+-#[macro_use(shuffle)]
+-extern crate packed_simd;
+-
+ #[cfg(feature = "serde")]
+ extern crate serde;
+
+ #[cfg(all(test, feature = "serde"))]
+ extern crate bincode;
+ #[cfg(all(test, feature = "serde"))]
+ #[macro_use]
+ extern crate serde_derive;
+diff --git a/third_party/rust/encoding_rs/src/mem.rs b/third_party/rust/encoding_rs/src/mem.rs
+--- third_party/rust/encoding_rs/src/mem.rs
++++ third_party/rust/encoding_rs/src/mem.rs
+@@ -111,16 +111,21 @@ macro_rules! by_unit_check_alu {
+ until_alignment -= 1;
+ }
+ if accu >= $bound {
+ return false;
+ }
+ }
+ let len_minus_stride = len - ALU_ALIGNMENT / unit_size;
+ if offset + (4 * (ALU_ALIGNMENT / unit_size)) <= len {
++ // Safety: the above check lets us perform 4 consecutive reads of
++ // length ALU_ALIGNMENT / unit_size. ALU_ALIGNMENT is the size of usize, and unit_size
++ // is the size of the `src` pointer, so this is equal to performing four usize reads.
++ //
++ // This invariant is upheld on all loop iterations
+ let len_minus_unroll = len - (4 * (ALU_ALIGNMENT / unit_size));
+ loop {
+ let unroll_accu = unsafe { *(src.add(offset) as *const usize) }
+ | unsafe {
+ *(src.add(offset + (ALU_ALIGNMENT / unit_size)) as *const usize)
+ }
+ | unsafe {
+ *(src.add(offset + (2 * (ALU_ALIGNMENT / unit_size)))
+@@ -129,22 +134,24 @@ macro_rules! by_unit_check_alu {
+ | unsafe {
+ *(src.add(offset + (3 * (ALU_ALIGNMENT / unit_size)))
+ as *const usize)
+ };
+ if unroll_accu & $mask != 0 {
+ return false;
+ }
+ offset += 4 * (ALU_ALIGNMENT / unit_size);
++ // Safety: this check lets us continue to perform the 4 reads earlier
+ if offset > len_minus_unroll {
+ break;
+ }
+ }
+ }
+ while offset <= len_minus_stride {
++ // Safety: the above check lets us perform one usize read.
+ accu |= unsafe { *(src.add(offset) as *const usize) };
+ offset += ALU_ALIGNMENT / unit_size;
+ }
+ }
+ }
+ for &unit in &buffer[offset..] {
+ accu |= unit as usize;
+ }
+@@ -184,16 +191,21 @@ macro_rules! by_unit_check_simd {
+ until_alignment -= 1;
+ }
+ if accu >= $bound {
+ return false;
+ }
+ }
+ let len_minus_stride = len - SIMD_STRIDE_SIZE / unit_size;
+ if offset + (4 * (SIMD_STRIDE_SIZE / unit_size)) <= len {
++ // Safety: the above check lets us perform 4 consecutive reads of
++ // length SIMD_STRIDE_SIZE / unit_size. SIMD_STRIDE_SIZE is the size of $simd_ty, and unit_size
++ // is the size of the `src` pointer, so this is equal to performing four $simd_ty reads.
++ //
++ // This invariant is upheld on all loop iterations
+ let len_minus_unroll = len - (4 * (SIMD_STRIDE_SIZE / unit_size));
+ loop {
+ let unroll_accu = unsafe { *(src.add(offset) as *const $simd_ty) }
+ | unsafe {
+ *(src.add(offset + (SIMD_STRIDE_SIZE / unit_size))
+ as *const $simd_ty)
+ }
+ | unsafe {
+@@ -203,23 +215,25 @@ macro_rules! by_unit_check_simd {
+ | unsafe {
+ *(src.add(offset + (3 * (SIMD_STRIDE_SIZE / unit_size)))
+ as *const $simd_ty)
+ };
+ if !$func(unroll_accu) {
+ return false;
+ }
+ offset += 4 * (SIMD_STRIDE_SIZE / unit_size);
++ // Safety: this check lets us continue to perform the 4 reads earlier
+ if offset > len_minus_unroll {
+ break;
+ }
+ }
+ }
+ let mut simd_accu = $splat;
+ while offset <= len_minus_stride {
++ // Safety: the above check lets us perform one $simd_ty read.
+ simd_accu = simd_accu | unsafe { *(src.add(offset) as *const $simd_ty) };
+ offset += SIMD_STRIDE_SIZE / unit_size;
+ }
+ if !$func(simd_accu) {
+ return false;
+ }
+ }
+ }
+@@ -229,18 +243,18 @@ macro_rules! by_unit_check_simd {
+ accu < $bound
+ }
+ };
+ }
+
+ cfg_if! {
+ if #[cfg(all(feature = "simd-accel", any(target_feature = "sse2", all(target_endian = "little", target_arch = "aarch64"), all(target_endian = "little", target_feature = "neon"))))] {
+ use crate::simd_funcs::*;
+- use packed_simd::u8x16;
+- use packed_simd::u16x8;
++ use core::simd::u8x16;
++ use core::simd::u16x8;
+
+ const SIMD_ALIGNMENT: usize = 16;
+
+ const SIMD_ALIGNMENT_MASK: usize = 15;
+
+ by_unit_check_simd!(is_ascii_impl, u8, u8x16::splat(0), u8x16, 0x80, simd_is_ascii);
+ by_unit_check_simd!(is_basic_latin_impl, u16, u16x8::splat(0), u16x8, 0x80, simd_is_basic_latin);
+ by_unit_check_simd!(is_utf16_latin1_impl, u16, u16x8::splat(0), u16x8, 0x100, simd_is_latin1);
+diff --git a/third_party/rust/encoding_rs/src/simd_funcs.rs b/third_party/rust/encoding_rs/src/simd_funcs.rs
+--- third_party/rust/encoding_rs/src/simd_funcs.rs
++++ third_party/rust/encoding_rs/src/simd_funcs.rs
+@@ -2,65 +2,84 @@
+ // file at the top-level directory of this distribution.
+ //
+ // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+ // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+ // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+ // option. This file may not be copied, modified, or distributed
+ // except according to those terms.
+
+-use packed_simd::u16x8;
+-use packed_simd::u8x16;
+-use packed_simd::IntoBits;
++use any_all_workaround::all_mask16x8;
++use any_all_workaround::all_mask8x16;
++use any_all_workaround::any_mask16x8;
++use any_all_workaround::any_mask8x16;
++use core::simd::cmp::SimdPartialEq;
++use core::simd::cmp::SimdPartialOrd;
++use core::simd::mask16x8;
++use core::simd::mask8x16;
++use core::simd::simd_swizzle;
++use core::simd::u16x8;
++use core::simd::u8x16;
++use core::simd::ToBytes;
+
+ // TODO: Migrate unaligned access to stdlib code if/when the RFC
+ // https://github.com/rust-lang/rfcs/pull/1725 is implemented.
+
++/// Safety invariant: ptr must be valid for an unaligned read of 16 bytes
+ #[inline(always)]
+ pub unsafe fn load16_unaligned(ptr: *const u8) -> u8x16 {
+- let mut simd = ::core::mem::uninitialized();
+- ::core::ptr::copy_nonoverlapping(ptr, &mut simd as *mut u8x16 as *mut u8, 16);
+- simd
++ let mut simd = ::core::mem::MaybeUninit::<u8x16>::uninit();
++ ::core::ptr::copy_nonoverlapping(ptr, simd.as_mut_ptr() as *mut u8, 16);
++ // Safety: copied 16 bytes of initialized memory into this, it is now initialized
++ simd.assume_init()
+ }
+
++/// Safety invariant: ptr must be valid for an aligned-for-u8x16 read of 16 bytes
+ #[allow(dead_code)]
+ #[inline(always)]
+ pub unsafe fn load16_aligned(ptr: *const u8) -> u8x16 {
+ *(ptr as *const u8x16)
+ }
+
++/// Safety invariant: ptr must be valid for an unaligned store of 16 bytes
+ #[inline(always)]
+ pub unsafe fn store16_unaligned(ptr: *mut u8, s: u8x16) {
+ ::core::ptr::copy_nonoverlapping(&s as *const u8x16 as *const u8, ptr, 16);
+ }
+
++/// Safety invariant: ptr must be valid for an aligned-for-u8x16 store of 16 bytes
+ #[allow(dead_code)]
+ #[inline(always)]
+ pub unsafe fn store16_aligned(ptr: *mut u8, s: u8x16) {
+ *(ptr as *mut u8x16) = s;
+ }
+
++/// Safety invariant: ptr must be valid for an unaligned read of 16 bytes
+ #[inline(always)]
+ pub unsafe fn load8_unaligned(ptr: *const u16) -> u16x8 {
+- let mut simd = ::core::mem::uninitialized();
+- ::core::ptr::copy_nonoverlapping(ptr as *const u8, &mut simd as *mut u16x8 as *mut u8, 16);
+- simd
++ let mut simd = ::core::mem::MaybeUninit::<u16x8>::uninit();
++ ::core::ptr::copy_nonoverlapping(ptr as *const u8, simd.as_mut_ptr() as *mut u8, 16);
++ // Safety: copied 16 bytes of initialized memory into this, it is now initialized
++ simd.assume_init()
+ }
+
++/// Safety invariant: ptr must be valid for an aligned-for-u16x8 read of 16 bytes
+ #[allow(dead_code)]
+ #[inline(always)]
+ pub unsafe fn load8_aligned(ptr: *const u16) -> u16x8 {
+ *(ptr as *const u16x8)
+ }
+
++/// Safety invariant: ptr must be valid for an unaligned store of 16 bytes
+ #[inline(always)]
+ pub unsafe fn store8_unaligned(ptr: *mut u16, s: u16x8) {
+ ::core::ptr::copy_nonoverlapping(&s as *const u16x8 as *const u8, ptr as *mut u8, 16);
+ }
+
++/// Safety invariant: ptr must be valid for an aligned-for-u16x8 store of 16 bytes
+ #[allow(dead_code)]
+ #[inline(always)]
+ pub unsafe fn store8_aligned(ptr: *mut u16, s: u16x8) {
+ *(ptr as *mut u16x8) = s;
+ }
+
+ cfg_if! {
+ if #[cfg(all(target_feature = "sse2", target_arch = "x86_64"))] {
+@@ -95,234 +114,241 @@ cfg_if! {
+ pub fn simd_byte_swap(s: u16x8) -> u16x8 {
+ let left = s << 8;
+ let right = s >> 8;
+ left | right
+ }
+
+ #[inline(always)]
+ pub fn to_u16_lanes(s: u8x16) -> u16x8 {
+- s.into_bits()
++ u16x8::from_ne_bytes(s)
+ }
+
+ cfg_if! {
+ if #[cfg(target_feature = "sse2")] {
+
+ // Expose low-level mask instead of higher-level conclusion,
+ // because the non-ASCII case would perform less well otherwise.
++ // Safety-usable invariant: This returned value is whether each high bit is set
+ #[inline(always)]
+ pub fn mask_ascii(s: u8x16) -> i32 {
+ unsafe {
+- _mm_movemask_epi8(s.into_bits())
++ _mm_movemask_epi8(s.into())
+ }
+ }
+
+ } else {
+
+ }
+ }
+
+ cfg_if! {
+ if #[cfg(target_feature = "sse2")] {
+ #[inline(always)]
+ pub fn simd_is_ascii(s: u8x16) -> bool {
+ unsafe {
+- _mm_movemask_epi8(s.into_bits()) == 0
++ // Safety: We have cfg()d the correct platform
++ _mm_movemask_epi8(s.into()) == 0
+ }
+ }
+ } else if #[cfg(target_arch = "aarch64")]{
+ #[inline(always)]
+ pub fn simd_is_ascii(s: u8x16) -> bool {
+ unsafe {
+- vmaxvq_u8(s.into_bits()) < 0x80
++ // Safety: We have cfg()d the correct platform
++ vmaxvq_u8(s.into()) < 0x80
+ }
+ }
+ } else {
+ #[inline(always)]
+ pub fn simd_is_ascii(s: u8x16) -> bool {
+ // This optimizes better on ARM than
+ // the lt formulation.
+ let highest_ascii = u8x16::splat(0x7F);
+- !s.gt(highest_ascii).any()
++ !any_mask8x16(s.simd_gt(highest_ascii))
+ }
+ }
+ }
+
+ cfg_if! {
+ if #[cfg(target_feature = "sse2")] {
+ #[inline(always)]
+ pub fn simd_is_str_latin1(s: u8x16) -> bool {
+ if simd_is_ascii(s) {
+ return true;
+ }
+ let above_str_latin1 = u8x16::splat(0xC4);
+- s.lt(above_str_latin1).all()
++ s.simd_lt(above_str_latin1).all()
+ }
+ } else if #[cfg(target_arch = "aarch64")]{
+ #[inline(always)]
+ pub fn simd_is_str_latin1(s: u8x16) -> bool {
+ unsafe {
+- vmaxvq_u8(s.into_bits()) < 0xC4
++ // Safety: We have cfg()d the correct platform
++ vmaxvq_u8(s.into()) < 0xC4
+ }
+ }
+ } else {
+ #[inline(always)]
+ pub fn simd_is_str_latin1(s: u8x16) -> bool {
+ let above_str_latin1 = u8x16::splat(0xC4);
+- s.lt(above_str_latin1).all()
++ all_mask8x16(s.simd_lt(above_str_latin1))
+ }
+ }
+ }
+
+ cfg_if! {
+ if #[cfg(target_arch = "aarch64")]{
+ #[inline(always)]
+ pub fn simd_is_basic_latin(s: u16x8) -> bool {
+ unsafe {
+- vmaxvq_u16(s.into_bits()) < 0x80
++ // Safety: We have cfg()d the correct platform
++ vmaxvq_u16(s.into()) < 0x80
+ }
+ }
+
+ #[inline(always)]
+ pub fn simd_is_latin1(s: u16x8) -> bool {
+ unsafe {
+- vmaxvq_u16(s.into_bits()) < 0x100
++ // Safety: We have cfg()d the correct platform
++ vmaxvq_u16(s.into()) < 0x100
+ }
+ }
+ } else {
+ #[inline(always)]
+ pub fn simd_is_basic_latin(s: u16x8) -> bool {
+ let above_ascii = u16x8::splat(0x80);
+- s.lt(above_ascii).all()
++ all_mask16x8(s.simd_lt(above_ascii))
+ }
+
+ #[inline(always)]
+ pub fn simd_is_latin1(s: u16x8) -> bool {
+ // For some reason, on SSE2 this formulation
+ // seems faster in this case while the above
+ // function is better the other way round...
+ let highest_latin1 = u16x8::splat(0xFF);
+- !s.gt(highest_latin1).any()
++ !any_mask16x8(s.simd_gt(highest_latin1))
+ }
+ }
+ }
+
+ #[inline(always)]
+ pub fn contains_surrogates(s: u16x8) -> bool {
+ let mask = u16x8::splat(0xF800);
+ let surrogate_bits = u16x8::splat(0xD800);
+- (s & mask).eq(surrogate_bits).any()
++ any_mask16x8((s & mask).simd_eq(surrogate_bits))
+ }
+
+ cfg_if! {
+ if #[cfg(target_arch = "aarch64")]{
+ macro_rules! aarch64_return_false_if_below_hebrew {
+ ($s:ident) => ({
+ unsafe {
+- if vmaxvq_u16($s.into_bits()) < 0x0590 {
++ // Safety: We have cfg()d the correct platform
++ if vmaxvq_u16($s.into()) < 0x0590 {
+ return false;
+ }
+ }
+ })
+ }
+
+ macro_rules! non_aarch64_return_false_if_all {
+ ($s:ident) => ()
+ }
+ } else {
+ macro_rules! aarch64_return_false_if_below_hebrew {
+ ($s:ident) => ()
+ }
+
+ macro_rules! non_aarch64_return_false_if_all {
+ ($s:ident) => ({
+- if $s.all() {
++ if all_mask16x8($s) {
+ return false;
+ }
+ })
+ }
+ }
+ }
+
+ macro_rules! in_range16x8 {
+ ($s:ident, $start:expr, $end:expr) => {{
+ // SIMD sub is wrapping
+- ($s - u16x8::splat($start)).lt(u16x8::splat($end - $start))
++ ($s - u16x8::splat($start)).simd_lt(u16x8::splat($end - $start))
+ }};
+ }
+
+ #[inline(always)]
+ pub fn is_u16x8_bidi(s: u16x8) -> bool {
+ // We try to first quickly refute the RTLness of the vector. If that
+ // fails, we do the real RTL check, so in that case we end up wasting
+ // the work for the up-front quick checks. Even the quick-check is
+ // two-fold in order to return `false` ASAP if everything is below
+ // Hebrew.
+
+ aarch64_return_false_if_below_hebrew!(s);
+
+- let below_hebrew = s.lt(u16x8::splat(0x0590));
++ let below_hebrew = s.simd_lt(u16x8::splat(0x0590));
+
+ non_aarch64_return_false_if_all!(below_hebrew);
+
+- if (below_hebrew | in_range16x8!(s, 0x0900, 0x200F) | in_range16x8!(s, 0x2068, 0xD802)).all() {
++ if all_mask16x8(
++ below_hebrew | in_range16x8!(s, 0x0900, 0x200F) | in_range16x8!(s, 0x2068, 0xD802),
++ ) {
+ return false;
+ }
+
+ // Quick refutation failed. Let's do the full check.
+
+- (in_range16x8!(s, 0x0590, 0x0900)
+- | in_range16x8!(s, 0xFB1D, 0xFE00)
+- | in_range16x8!(s, 0xFE70, 0xFEFF)
+- | in_range16x8!(s, 0xD802, 0xD804)
+- | in_range16x8!(s, 0xD83A, 0xD83C)
+- | s.eq(u16x8::splat(0x200F))
+- | s.eq(u16x8::splat(0x202B))
+- | s.eq(u16x8::splat(0x202E))
+- | s.eq(u16x8::splat(0x2067)))
+- .any()
++ any_mask16x8(
++ (in_range16x8!(s, 0x0590, 0x0900)
++ | in_range16x8!(s, 0xFB1D, 0xFE00)
++ | in_range16x8!(s, 0xFE70, 0xFEFF)
++ | in_range16x8!(s, 0xD802, 0xD804)
++ | in_range16x8!(s, 0xD83A, 0xD83C)
++ | s.simd_eq(u16x8::splat(0x200F))
++ | s.simd_eq(u16x8::splat(0x202B))
++ | s.simd_eq(u16x8::splat(0x202E))
++ | s.simd_eq(u16x8::splat(0x2067))),
++ )
+ }
+
+ #[inline(always)]
+ pub fn simd_unpack(s: u8x16) -> (u16x8, u16x8) {
+- unsafe {
+- let first: u8x16 = shuffle!(
+- s,
+- u8x16::splat(0),
+- [0, 16, 1, 17, 2, 18, 3, 19, 4, 20, 5, 21, 6, 22, 7, 23]
+- );
+- let second: u8x16 = shuffle!(
+- s,
+- u8x16::splat(0),
+- [8, 24, 9, 25, 10, 26, 11, 27, 12, 28, 13, 29, 14, 30, 15, 31]
+- );
+- (first.into_bits(), second.into_bits())
+- }
++ let first: u8x16 = simd_swizzle!(
++ s,
++ u8x16::splat(0),
++ [0, 16, 1, 17, 2, 18, 3, 19, 4, 20, 5, 21, 6, 22, 7, 23]
++ );
++ let second: u8x16 = simd_swizzle!(
++ s,
++ u8x16::splat(0),
++ [8, 24, 9, 25, 10, 26, 11, 27, 12, 28, 13, 29, 14, 30, 15, 31]
++ );
++ (u16x8::from_ne_bytes(first), u16x8::from_ne_bytes(second))
+ }
+
+ cfg_if! {
+ if #[cfg(target_feature = "sse2")] {
+ #[inline(always)]
+ pub fn simd_pack(a: u16x8, b: u16x8) -> u8x16 {
+ unsafe {
+- _mm_packus_epi16(a.into_bits(), b.into_bits()).into_bits()
++ // Safety: We have cfg()d the correct platform
++ _mm_packus_epi16(a.into(), b.into()).into()
+ }
+ }
+ } else {
+ #[inline(always)]
+ pub fn simd_pack(a: u16x8, b: u16x8) -> u8x16 {
+- unsafe {
+- let first: u8x16 = a.into_bits();
+- let second: u8x16 = b.into_bits();
+- shuffle!(
+- first,
+- second,
+- [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30]
+- )
+- }
++ let first: u8x16 = a.to_ne_bytes();
++ let second: u8x16 = b.to_ne_bytes();
++ simd_swizzle!(
++ first,
++ second,
++ [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30]
++ )
+ }
+ }
+ }
+
+ #[cfg(test)]
+ mod tests {
+ use super::*;
+ use alloc::vec::Vec;
+diff --git a/third_party/rust/encoding_rs/src/single_byte.rs b/third_party/rust/encoding_rs/src/single_byte.rs
+--- third_party/rust/encoding_rs/src/single_byte.rs
++++ third_party/rust/encoding_rs/src/single_byte.rs
+@@ -48,16 +48,19 @@ impl SingleByteDecoder {
+ CopyAsciiResult::GoOn((mut non_ascii, mut handle)) => 'middle: loop {
+ // Start non-boilerplate
+ //
+ // Since the non-ASCIIness of `non_ascii` is hidden from
+ // the optimizer, it can't figure out that it's OK to
+ // statically omit the bound check when accessing
+ // `[u16; 128]` with an index
+ // `non_ascii as usize - 0x80usize`.
++ //
++ // Safety: `non_ascii` is a u8 byte >=0x80, from the invariants
++ // on Utf8Destination::copy_ascii_from_check_space_bmp()
+ let mapped =
+ unsafe { *(self.table.get_unchecked(non_ascii as usize - 0x80usize)) };
+ // let mapped = self.table[non_ascii as usize - 0x80usize];
+ if mapped == 0u16 {
+ return (
+ DecoderResult::Malformed(1, 0),
+ source.consumed(),
+ handle.written(),
+@@ -146,82 +149,103 @@ impl SingleByteDecoder {
+ dst: &mut [u16],
+ _last: bool,
+ ) -> (DecoderResult, usize, usize) {
+ let (pending, length) = if dst.len() < src.len() {
+ (DecoderResult::OutputFull, dst.len())
+ } else {
+ (DecoderResult::InputEmpty, src.len())
+ };
++ // Safety invariant: converted <= length. Quite often we have `converted < length`
++ // which will be separately marked.
+ let mut converted = 0usize;
+ 'outermost: loop {
+ match unsafe {
++ // Safety: length is the minimum length, `src/dst + x` will always be valid for reads/writes of `len - x`
+ ascii_to_basic_latin(
+ src.as_ptr().add(converted),
+ dst.as_mut_ptr().add(converted),
+ length - converted,
+ )
+ } {
+ None => {
+ return (pending, length, length);
+ }
+ Some((mut non_ascii, consumed)) => {
++ // Safety invariant: `converted <= length` upheld, since this can only consume
++ // up to `length - converted` bytes.
++ //
++ // Furthermore, in this context,
++ // we can assume `converted < length` since this branch is only ever hit when
++ // ascii_to_basic_latin fails to consume the entire slice
+ converted += consumed;
+ 'middle: loop {
+ // `converted` doesn't count the reading of `non_ascii` yet.
+ // Since the non-ASCIIness of `non_ascii` is hidden from
+ // the optimizer, it can't figure out that it's OK to
+ // statically omit the bound check when accessing
+ // `[u16; 128]` with an index
+ // `non_ascii as usize - 0x80usize`.
++ //
++ // Safety: We can rely on `non_ascii` being between `0x80` and `0xFF` due to
++ // the invariants of `ascii_to_basic_latin()`, and our table has enough space for that.
+ let mapped =
+ unsafe { *(self.table.get_unchecked(non_ascii as usize - 0x80usize)) };
+ // let mapped = self.table[non_ascii as usize - 0x80usize];
+ if mapped == 0u16 {
+ return (
+ DecoderResult::Malformed(1, 0),
+ converted + 1, // +1 `for non_ascii`
+ converted,
+ );
+ }
+ unsafe {
+- // The bound check has already been performed
++ // Safety: As mentioned above, `converted < length`
+ *(dst.get_unchecked_mut(converted)) = mapped;
+ }
++ // Safety: `converted <= length` upheld, since `converted < length` before this
+ converted += 1;
+ // Next, handle ASCII punctuation and non-ASCII without
+ // going back to ASCII acceleration. Non-ASCII scripts
+ // use ASCII punctuation, so this avoid going to
+ // acceleration just for punctuation/space and then
+ // failing. This is a significant boost to non-ASCII
+ // scripts.
+ // TODO: Split out Latin converters without this part
+ // this stuff makes Latin script-conversion slower.
+ if converted == length {
+ return (pending, length, length);
+ }
++ // Safety: We are back to `converted < length` because of the == above
++ // and can perform this check.
+ let mut b = unsafe { *(src.get_unchecked(converted)) };
++ // Safety: `converted < length` is upheld for this loop
+ 'innermost: loop {
+ if b > 127 {
+ non_ascii = b;
+ continue 'middle;
+ }
+ // Testing on Haswell says that we should write the
+ // byte unconditionally instead of trying to unread it
+ // to make it part of the next SIMD stride.
+ unsafe {
++ // Safety: `converted < length` is true for this loop
+ *(dst.get_unchecked_mut(converted)) = u16::from(b);
+ }
++ // Safety: We are now at `converted <= length`. We should *not* `continue`
++ // the loop without reverifying
+ converted += 1;
+ if b < 60 {
+ // We've got punctuation
+ if converted == length {
+ return (pending, length, length);
+ }
++ // Safety: we're back to `converted <= length` because of the == above
+ b = unsafe { *(src.get_unchecked(converted)) };
++ // Safety: The loop continues as `converted < length`
+ continue 'innermost;
+ }
+ // We've got markup or ASCII text
+ continue 'outermost;
+ }
+ }
+ }
+ }
+@@ -229,16 +253,18 @@ impl SingleByteDecoder {
+ }
+
+ pub fn latin1_byte_compatible_up_to(&self, buffer: &[u8]) -> usize {
+ let mut bytes = buffer;
+ let mut total = 0;
+ loop {
+ if let Some((non_ascii, offset)) = validate_ascii(bytes) {
+ total += offset;
++ // Safety: We can rely on `non_ascii` being between `0x80` and `0xFF` due to
++ // the invariants of `ascii_to_basic_latin()`, and our table has enough space for that.
+ let mapped = unsafe { *(self.table.get_unchecked(non_ascii as usize - 0x80usize)) };
+ if mapped != u16::from(non_ascii) {
+ return total;
+ }
+ total += 1;
+ bytes = &bytes[offset + 1..];
+ } else {
+ return total;
+@@ -379,64 +405,89 @@ impl SingleByteEncoder {
+ dst: &mut [u8],
+ _last: bool,
+ ) -> (EncoderResult, usize, usize) {
+ let (pending, length) = if dst.len() < src.len() {
+ (EncoderResult::OutputFull, dst.len())
+ } else {
+ (EncoderResult::InputEmpty, src.len())
+ };
++ // Safety invariant: converted <= length. Quite often we have `converted < length`
++ // which will be separately marked.
+ let mut converted = 0usize;
+ 'outermost: loop {
+ match unsafe {
++ // Safety: length is the minimum length, `src/dst + x` will always be valid for reads/writes of `len - x`
+ basic_latin_to_ascii(
+ src.as_ptr().add(converted),
+ dst.as_mut_ptr().add(converted),
+ length - converted,
+ )
+ } {
+ None => {
+ return (pending, length, length);
+ }
+ Some((mut non_ascii, consumed)) => {
++ // Safety invariant: `converted <= length` upheld, since this can only consume
++ // up to `length - converted` bytes.
++ //
++ // Furthermore, in this context,
++ // we can assume `converted < length` since this branch is only ever hit when
++ // ascii_to_basic_latin fails to consume the entire slice
+ converted += consumed;
+ 'middle: loop {
+ // `converted` doesn't count the reading of `non_ascii` yet.
+ match self.encode_u16(non_ascii) {
+ Some(byte) => {
+ unsafe {
++ // Safety: we're allowed this access since `converted < length`
+ *(dst.get_unchecked_mut(converted)) = byte;
+ }
+ converted += 1;
++ // `converted <= length` now
+ }
+ None => {
+ // At this point, we need to know if we
+ // have a surrogate.
+ let high_bits = non_ascii & 0xFC00u16;
+ if high_bits == 0xD800u16 {
+ // high surrogate
+ if converted + 1 == length {
+ // End of buffer. This surrogate is unpaired.
+ return (
+ EncoderResult::Unmappable('\u{FFFD}'),
+ converted + 1, // +1 `for non_ascii`
+ converted,
+ );
+ }
++ // Safety: convered < length from outside the match, and `converted + 1 != length`,
++ // So `converted + 1 < length` as well. We're in bounds
+ let second =
+ u32::from(unsafe { *src.get_unchecked(converted + 1) });
+ if second & 0xFC00u32 != 0xDC00u32 {
+ return (
+ EncoderResult::Unmappable('\u{FFFD}'),
+ converted + 1, // +1 `for non_ascii`
+ converted,
+ );
+ }
+ // The next code unit is a low surrogate.
+ let astral: char = unsafe {
++ // Safety: We can rely on non_ascii being 0xD800-0xDBFF since the high bits are 0xD800
++ // Then, (non_ascii << 10 - 0xD800 << 10) becomes between (0 to 0x3FF) << 10, which is between
++ // 0x400 to 0xffc00. Adding the 0x10000 gives a range of 0x10400 to 0x10fc00. Subtracting the 0xDC00
++ // gives 0x2800 to 0x102000
++ // The second term is between 0xDC00 and 0xDFFF from the check above. This gives a maximum
++ // possible range of (0x10400 + 0xDC00) to (0x102000 + 0xDFFF) which is 0x1E000 to 0x10ffff.
++ // This is in range.
++ //
++ // From a Unicode principles perspective this can also be verified as we have checked that `non_ascii` is a high surrogate
++ // (0xD800..=0xDBFF), and that `second` is a low surrogate (`0xDC00..=0xDFFF`), and we are applying reverse of the UTC16 transformation
++ // algorithm <https://en.wikipedia.org/wiki/UTF-16#Code_points_from_U+010000_to_U+10FFFF>, by applying the high surrogate - 0xD800 to the
++ // high ten bits, and the low surrogate - 0xDc00 to the low ten bits, and then adding 0x10000
+ ::core::char::from_u32_unchecked(
+ (u32::from(non_ascii) << 10) + second
+ - (((0xD800u32 << 10) - 0x1_0000u32) + 0xDC00u32),
+ )
+ };
+ return (
+ EncoderResult::Unmappable(astral),
+ converted + 2, // +2 `for non_ascii` and `second`
+@@ -451,52 +502,63 @@ impl SingleByteEncoder {
+ converted,
+ );
+ }
+ return (
+ EncoderResult::unmappable_from_bmp(non_ascii),
+ converted + 1, // +1 `for non_ascii`
+ converted,
+ );
++ // Safety: This branch diverges, so no need to uphold invariants on `converted`
+ }
+ }
+ // Next, handle ASCII punctuation and non-ASCII without
+ // going back to ASCII acceleration. Non-ASCII scripts
+ // use ASCII punctuation, so this avoid going to
+ // acceleration just for punctuation/space and then
+ // failing. This is a significant boost to non-ASCII
+ // scripts.
+ // TODO: Split out Latin converters without this part
+ // this stuff makes Latin script-conversion slower.
+ if converted == length {
+ return (pending, length, length);
+ }
++ // Safety: we're back to `converted < length` due to the == above and can perform
++ // the unchecked read
+ let mut unit = unsafe { *(src.get_unchecked(converted)) };
+ 'innermost: loop {
++ // Safety: This loop always begins with `converted < length`, see
++ // the invariant outside and the comment on the continue below
+ if unit > 127 {
+ non_ascii = unit;
+ continue 'middle;
+ }
+ // Testing on Haswell says that we should write the
+ // byte unconditionally instead of trying to unread it
+ // to make it part of the next SIMD stride.
+ unsafe {
++ // Safety: Can rely on converted < length
+ *(dst.get_unchecked_mut(converted)) = unit as u8;
+ }
+ converted += 1;
++ // `converted <= length` here
+ if unit < 60 {
+ // We've got punctuation
+ if converted == length {
+ return (pending, length, length);
+ }
++ // Safety: `converted < length` due to the == above. The read is safe.
+ unit = unsafe { *(src.get_unchecked(converted)) };
++ // Safety: This only happens if `converted < length`, maintaining it
+ continue 'innermost;
+ }
+ // We've got markup or ASCII text
+ continue 'outermost;
++ // Safety: All other routes to here diverge so the continue is the only
++ // way to run the innermost loop.
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+diff --git a/third_party/rust/encoding_rs/src/x_user_defined.rs b/third_party/rust/encoding_rs/src/x_user_defined.rs
+--- third_party/rust/encoding_rs/src/x_user_defined.rs
++++ third_party/rust/encoding_rs/src/x_user_defined.rs
+@@ -9,22 +9,23 @@
+
+ use super::*;
+ use crate::handles::*;
+ use crate::variant::*;
+
+ cfg_if! {
+ if #[cfg(feature = "simd-accel")] {
+ use simd_funcs::*;
+- use packed_simd::u16x8;
++ use core::simd::u16x8;
++ use core::simd::cmp::SimdPartialOrd;
+
+ #[inline(always)]
+ fn shift_upper(unpacked: u16x8) -> u16x8 {
+ let highest_ascii = u16x8::splat(0x7F);
+- unpacked + unpacked.gt(highest_ascii).select(u16x8::splat(0xF700), u16x8::splat(0)) }
++ unpacked + unpacked.simd_gt(highest_ascii).select(u16x8::splat(0xF700), u16x8::splat(0)) }
+ } else {
+ }
+ }
+
+ pub struct UserDefinedDecoder;
+
+ impl UserDefinedDecoder {
+ pub fn new() -> VariantDecoder {
+@@ -111,20 +112,25 @@ impl UserDefinedDecoder {
+ } else {
+ (DecoderResult::InputEmpty, src.len())
+ };
+ // Not bothering with alignment
+ let tail_start = length & !0xF;
+ let simd_iterations = length >> 4;
+ let src_ptr = src.as_ptr();
+ let dst_ptr = dst.as_mut_ptr();
++ // Safety: This is `for i in 0..length / 16`
+ for i in 0..simd_iterations {
++ // Safety: This is in bounds: length is the minumum valid length for both src/dst
++ // and i ranges to length/16, so multiplying by 16 will always be `< length` and can do
++ // a 16 byte read
+ let input = unsafe { load16_unaligned(src_ptr.add(i * 16)) };
+ let (first, second) = simd_unpack(input);
+ unsafe {
++ // Safety: same as above, but this is two consecutive 8-byte reads
+ store8_unaligned(dst_ptr.add(i * 16), shift_upper(first));
+ store8_unaligned(dst_ptr.add((i * 16) + 8), shift_upper(second));
+ }
+ }
+ let src_tail = &src[tail_start..length];
+ let dst_tail = &mut dst[tail_start..length];
+ src_tail
+ .iter()
+
+diff --git a/third_party/rust/encoding_rs/.cargo-checksum.json b/third_party/rust/encoding_rs/.cargo-checksum.json
+--- third_party/rust/encoding_rs/.cargo-checksum.json
++++ third_party/rust/encoding_rs/.cargo-checksum.json
+@@ -1 +1 @@
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diff --git a/www/firefox-esr/files/patch-rust-1.78.0-arm b/www/firefox-esr/files/patch-rust-1.78.0-arm
new file mode 100644
index 000000000000..7db8038cfaeb
--- /dev/null
+++ b/www/firefox-esr/files/patch-rust-1.78.0-arm
@@ -0,0 +1,64 @@
+Relevant bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1882291
+
+
+diff --git a/Cargo.lock b/Cargo.lock
+--- Cargo.lock
++++ Cargo.lock
+@@ -4274,10 +4274,11 @@
+ [[package]]
+ name = "qcms"
+ version = "0.2.0"
+ dependencies = [
+ "libc",
++ "version_check",
+ ]
+
+ [[package]]
+ name = "qlog"
+ version = "0.4.0"
+diff --git a/gfx/qcms/Cargo.toml b/gfx/qcms/Cargo.toml
+--- gfx/qcms/Cargo.toml
++++ gfx/qcms/Cargo.toml
+@@ -18,5 +18,8 @@
+ iccv4-enabled = []
+ cmyk = []
+
+ [dependencies]
+ libc = {version = "0.2", optional = true }
++
++[build-dependencies]
++version_check = "0.9"
+diff --git a/gfx/qcms/build.rs b/gfx/qcms/build.rs
+new file mode 100644
+--- /dev/null
++++ gfx/qcms/build.rs
+@@ -0,0 +1,7 @@
++extern crate version_check as rustc;
++
++fn main() {
++ if rustc::is_min_version("1.78.0").unwrap_or(false) {
++ println!("cargo:rustc-cfg=stdsimd_split");
++ }
++}
+diff --git a/gfx/qcms/src/lib.rs b/gfx/qcms/src/lib.rs
+--- gfx/qcms/src/lib.rs
++++ gfx/qcms/src/lib.rs
+@@ -5,13 +5,15 @@
+ #![allow(non_camel_case_types)]
+ #![allow(non_snake_case)]
+ #![allow(non_upper_case_globals)]
+ // These are needed for the neon SIMD code and can be removed once the MSRV supports the
+ // instrinsics we use
+-#![cfg_attr(feature = "neon", feature(stdsimd))]
++#![cfg_attr(all(stdsimd_split, target_arch = "arm", feature = "neon"), feature(stdarch_arm_neon_intrinsics))]
++#![cfg_attr(all(stdsimd_split, target_arch = "arm", feature = "neon"), feature(stdarch_arm_feature_detection))]
++#![cfg_attr(all(not(stdsimd_split), target_arch = "arm", feature = "neon"), feature(stdsimd))]
+ #![cfg_attr(
+- feature = "neon",
++ all(target_arch = "arm", feature = "neon"),
+ feature(arm_target_feature, raw_ref_op)
+
+ )]
+
+ /// These values match the Rendering Intent values from the ICC spec
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 12:57:08 +0000