Auto merge of #135701 - calebzulawski:sync-from-portable-simd-2025-01-18, r=workingjubilee

Portable SIMD subtree update

r? `@workingjubilee`

Author: bors

library/portable-simd/.github/workflows/ci.yml

@@ -9,19 +9,15 @@ on:
 env:
   CARGO_NET_RETRY: 10
   RUSTUP_MAX_RETRIES: 10
+  PROPTEST_CASES: 64
 
 jobs:
   rustfmt:
     name: "rustfmt"
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
-          rustup component add rustfmt
+      - uses: actions/checkout@v4
       - name: Run rustfmt
         run: cargo fmt --all -- --check
 
@@ -37,7 +33,9 @@ jobs:
           - i686-unknown-linux-gnu
           - i586-unknown-linux-gnu
           - aarch64-unknown-linux-gnu
+          - arm64ec-pc-windows-msvc
           - armv7-unknown-linux-gnueabihf
+          - loongarch64-unknown-linux-gnu
           # non-nightly since https://github.com/rust-lang/rust/pull/113274
           # - mips-unknown-linux-gnu
           # - mips64-unknown-linux-gnuabi64
@@ -49,13 +47,9 @@ jobs:
           - wasm32-unknown-unknown
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
-          rustup target add ${{ matrix.target }}
-          rustup component add clippy
+        run: rustup target add ${{ matrix.target }}
       - name: Run Clippy
         run: cargo clippy --all-targets --target ${{ matrix.target }}
 
@@ -65,26 +59,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        target: [x86_64-pc-windows-msvc, i686-pc-windows-msvc, i586-pc-windows-msvc, x86_64-unknown-linux-gnu, x86_64-apple-darwin]
+        target: [x86_64-pc-windows-msvc, i686-pc-windows-msvc, i586-pc-windows-msvc, x86_64-unknown-linux-gnu]
         # `default` means we use the default target config for the target,
         # `native` means we run with `-Ctarget-cpu=native`, and anything else is
         # an arg to `-Ctarget-feature`
         target_feature: [default, native, +sse3, +ssse3, +sse4.1, +sse4.2, +avx, +avx2]
 
         exclude:
-          # The macos runners seem to only reliably support up to `avx`.
-          - { target: x86_64-apple-darwin, target_feature: +avx2 }
-          # These features are statically known to be present for all 64 bit
-          # macs, and thus are covered by the `default` test
-          - { target: x86_64-apple-darwin, target_feature: +sse3 }
-          - { target: x86_64-apple-darwin, target_feature: +ssse3 }
           # -Ctarget-cpu=native sounds like bad-news if target != host
           - { target: i686-pc-windows-msvc, target_feature: native }
           - { target: i586-pc-windows-msvc, target_feature: native }
 
         include:
           # Populate the `matrix.os` field
-          - { target: x86_64-apple-darwin,      os: macos-latest }
           - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest }
           - { target: x86_64-pc-windows-msvc,   os: windows-latest }
           - { target: i686-pc-windows-msvc,     os: windows-latest }
@@ -98,12 +85,9 @@ jobs:
           # avx512vl, but occasionally doesn't.  Maybe one day we can enable it.
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
-          rustup target add ${{ matrix.target }}
+        run: rustup target add ${{ matrix.target }}
 
       - name: Configure RUSTFLAGS
         shell: bash
@@ -145,6 +129,35 @@ jobs:
         run: cargo doc --verbose --target=${{ matrix.target }}
         env:
           RUSTDOCFLAGS: -Dwarnings
+    
+  macos-tests:
+    name: ${{ matrix.target }}
+    runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - aarch64-apple-darwin
+          - x86_64-apple-darwin
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Rust
+        run: rustup target add ${{ matrix.target }}
+
+      - name: Configure RUSTFLAGS
+        shell: bash
+        run: echo "RUSTFLAGS=-Dwarnings" >> $GITHUB_ENV
+
+      - name: Test (debug)
+        run: cargo test --verbose --target=${{ matrix.target }}
+
+      - name: Test (release)
+        run: cargo test --verbose --target=${{ matrix.target }} --release
+
+      - name: Generate docs
+        run: cargo doc --verbose --target=${{ matrix.target }}
+        env:
+          RUSTDOCFLAGS: -Dwarnings
 
   wasm-tests:
     name: "wasm (firefox, ${{ matrix.name }})"
@@ -155,11 +168,7 @@ jobs:
           - { name: default, RUSTFLAGS: "" }
           - { name: simd128, RUSTFLAGS: "-C target-feature=+simd128" }
     steps:
-      - uses: actions/checkout@v2
-      - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
+      - uses: actions/checkout@v4
       - name: Install wasm-pack
         run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
       - name: Test (debug)
@@ -174,6 +183,8 @@ jobs:
   cross-tests:
     name: "${{ matrix.target_feature }} on ${{ matrix.target }} (via cross)"
     runs-on: ubuntu-latest
+    env:
+      PROPTEST_CASES: 16
     strategy:
       fail-fast: false
 
@@ -185,6 +196,7 @@ jobs:
           - powerpc-unknown-linux-gnu
           - powerpc64le-unknown-linux-gnu       # includes altivec by default
           - riscv64gc-unknown-linux-gnu
+          - loongarch64-unknown-linux-gnu
           # MIPS uses a nonstandard binary representation for NaNs which makes it worth testing
           # non-nightly since https://github.com/rust-lang/rust/pull/113274
           # - mips-unknown-linux-gnu
@@ -201,24 +213,14 @@ jobs:
           # - { target: riscv64gc-unknown-linux-gnu, target_feature: "+v,+zvl128b" }
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
-          rustup target add ${{ matrix.target }}
-          rustup component add rust-src
+        run: rustup target add ${{ matrix.target }}
 
       - name: Install Cross
-        # Equivalent to `cargo install cross`, but downloading a prebuilt
-        # binary. Ideally we wouldn't hardcode a version, but the version number
-        # being part of the tarball means we can't just use the download/latest
-        # URL :(
+        # Install the latest git version for newer targets.
         run: |
-          CROSS_URL=https://github.com/cross-rs/cross/releases/download/v0.2.5/cross-x86_64-unknown-linux-gnu.tar.gz
-          mkdir -p "$HOME/.bin"
-          curl -sfSL --retry-delay 10 --retry 5 "${CROSS_URL}" | tar zxf - -C "$HOME/.bin"
-          echo "$HOME/.bin" >> $GITHUB_PATH
+          cargo install cross --git https://github.com/cross-rs/cross --rev 4090beca3cfffa44371a5bba524de3a578aa46c3
 
       - name: Configure Emulated CPUs
         run: |
@@ -242,34 +244,11 @@ jobs:
       - name: Test (release)
         run: cross test --verbose --target=${{ matrix.target }} --release
 
-  features:
-    name: "Test cargo features (${{ matrix.simd }} × ${{ matrix.features }})"
+  miri:
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        simd:
-          - ""
-          - "avx512"
-        features:
-          - ""
-          - "--features std"
-          - "--features all_lane_counts"
-          - "--all-features"
-
+    env:
+      PROPTEST_CASES: 16
     steps:
-      - uses: actions/checkout@v2
-      - name: Setup Rust
-        run: |
-          rustup update nightly --no-self-update
-          rustup default nightly
-      - name: Detect AVX512
-        run: echo "CPU_FEATURE=$(lscpu | grep -o avx512[a-z]* | sed s/avx/+avx/ | tr '\n' ',' )" >> $GITHUB_ENV
-      - name: Check build
-        if: ${{ matrix.simd == '' }}
-        run: RUSTFLAGS="-Dwarnings" cargo test --all-targets --no-default-features ${{ matrix.features }}
-      - name: Check AVX
-        if: ${{ matrix.simd == 'avx512' && contains(env.CPU_FEATURE, 'avx512') }}
-        run: |
-          echo "Found AVX features: $CPU_FEATURE"
-          RUSTFLAGS="-Dwarnings -Ctarget-feature=$CPU_FEATURE" cargo test --all-targets --no-default-features ${{ matrix.features }}
+      - uses: actions/checkout@v4
+      - name: Test (Miri)
+        run: cargo miri test

library/portable-simd/.github/workflows/doc.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Setup Rust
         run: |

library/portable-simd/.gitignore

@@ -1 +1,2 @@
 /target
+git-subtree.sh

library/portable-simd/Cargo.toml

@@ -5,3 +5,9 @@ members = [
     "crates/std_float",
     "crates/test_helpers",
 ]
+
+[profile.test.package."*"]
+opt-level = 2
+
+[profile.test.package.test_helpers]
+opt-level = 2

library/portable-simd/Cross.toml

@@ -0,0 +1,2 @@
+[build.env]
+passthrough = ["PROPTEST_CASES"]

library/portable-simd/crates/core_simd/Cargo.toml

@@ -9,10 +9,9 @@ categories = ["hardware-support", "no-std"]
 license = "MIT OR Apache-2.0"
 
 [features]
-default = ["as_crate"]
+default = ["as_crate", "std"]
 as_crate = []
 std = []
-all_lane_counts = []
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 wasm-bindgen = "0.2"

library/portable-simd/crates/core_simd/src/lane_count.rs

@@ -33,10 +33,8 @@ macro_rules! supported_lane_count {
     };
 }
 
-supported_lane_count!(1, 2, 4, 8, 16, 32, 64);
-#[cfg(feature = "all_lane_counts")]
 supported_lane_count!(
-    3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
-    31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
-    56, 57, 58, 59, 60, 61, 62, 63
+    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
+    27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
+    51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
 );

library/portable-simd/crates/core_simd/src/lib.rs

@@ -1,7 +1,6 @@
 #![no_std]
 #![feature(
-    const_refs_to_cell,
-    const_mut_refs,
+    const_eval_select,
     convert_float_to_int,
     core_intrinsics,
     decl_macro,
@@ -26,6 +25,7 @@
     all(target_arch = "arm", target_feature = "v7"),
     feature(stdarch_arm_neon_intrinsics)
 )]
+#![cfg_attr(target_arch = "loongarch64", feature(stdarch_loongarch))]
 #![cfg_attr(
     any(target_arch = "powerpc", target_arch = "powerpc64"),
     feature(stdarch_powerpc)

library/portable-simd/crates/core_simd/src/masks.rs

@@ -308,48 +308,6 @@ where
         Self(mask_impl::Mask::from_bitmask_integer(bitmask))
     }
 
-    /// Creates a bitmask vector from a mask.
-    ///
-    /// Each bit is set if the corresponding element in the mask is `true`.
-    /// The remaining bits are unset.
-    ///
-    /// The bits are packed into the first N bits of the vector:
-    /// ```
-    /// # #![feature(portable_simd)]
-    /// # #[cfg(feature = "as_crate")] use core_simd::simd;
-    /// # #[cfg(not(feature = "as_crate"))] use core::simd;
-    /// # use simd::mask32x8;
-    /// let mask = mask32x8::from_array([true, false, true, false, false, false, true, false]);
-    /// assert_eq!(mask.to_bitmask_vector()[0], 0b01000101);
-    /// ```
-    #[inline]
-    #[must_use = "method returns a new integer and does not mutate the original value"]
-    pub fn to_bitmask_vector(self) -> Simd<u8, N> {
-        self.0.to_bitmask_vector()
-    }
-
-    /// Creates a mask from a bitmask vector.
-    ///
-    /// For each bit, if it is set, the corresponding element in the mask is set to `true`.
-    ///
-    /// The bits are packed into the first N bits of the vector:
-    /// ```
-    /// # #![feature(portable_simd)]
-    /// # #[cfg(feature = "as_crate")] use core_simd::simd;
-    /// # #[cfg(not(feature = "as_crate"))] use core::simd;
-    /// # use simd::{mask32x8, u8x8};
-    /// let bitmask = u8x8::from_array([0b01000101, 0, 0, 0, 0, 0, 0, 0]);
-    /// assert_eq!(
-    ///     mask32x8::from_bitmask_vector(bitmask),
-    ///     mask32x8::from_array([true, false, true, false, false, false, true, false]),
-    /// );
-    /// ```
-    #[inline]
-    #[must_use = "method returns a new mask and does not mutate the original value"]
-    pub fn from_bitmask_vector(bitmask: Simd<u8, N>) -> Self {
-        Self(mask_impl::Mask::from_bitmask_vector(bitmask))
-    }
-
     /// Finds the index of the first set element.
     ///
     /// ```

library/portable-simd/crates/core_simd/src/masks/bitmask.rs

@@ -122,23 +122,6 @@ where
         unsafe { Self(core::intrinsics::simd::simd_bitmask(value), PhantomData) }
     }
 
-    #[inline]
-    #[must_use = "method returns a new vector and does not mutate the original value"]
-    pub fn to_bitmask_vector(self) -> Simd<u8, N> {
-        let mut bitmask = Simd::splat(0);
-        bitmask.as_mut_array()[..self.0.as_ref().len()].copy_from_slice(self.0.as_ref());
-        bitmask
-    }
-
-    #[inline]
-    #[must_use = "method returns a new mask and does not mutate the original value"]
-    pub fn from_bitmask_vector(bitmask: Simd<u8, N>) -> Self {
-        let mut bytes = <LaneCount<N> as SupportedLaneCount>::BitMask::default();
-        let len = bytes.as_ref().len();
-        bytes.as_mut().copy_from_slice(&bitmask.as_array()[..len]);
-        Self(bytes, PhantomData)
-    }
-
     #[inline]
     pub fn to_bitmask_integer(self) -> u64 {
         let mut bitmask = [0u8; 8];