Rollup merge of rust-lang#148402 - folkertdev:stdarch-sync-nov-2025, r=sayantn

stdarch subtree update

Subtree update of `stdarch` to rust-lang/stdarch@b5c1645.

Created using https://github.com/rust-lang/josh-sync.

r? `@sayantn`

---

Only the last 2 commits contain manual changes to some incorrect miri tests. The remainder is mechanical, and just synchronizes changes from stdarch.

Author: matthiaskrgr

library/core/src/hint.rs

@@ -271,11 +271,11 @@ pub fn spin_loop() {
     crate::cfg_select! {
         target_arch = "x86" => {
             // SAFETY: the `cfg` attr ensures that we only execute this on x86 targets.
-            unsafe { crate::arch::x86::_mm_pause() }
+            crate::arch::x86::_mm_pause()
         }
         target_arch = "x86_64" => {
             // SAFETY: the `cfg` attr ensures that we only execute this on x86_64 targets.
-            unsafe { crate::arch::x86_64::_mm_pause() }
+            crate::arch::x86_64::_mm_pause()
         }
         target_arch = "riscv32" => crate::arch::riscv32::pause(),
         target_arch = "riscv64" => crate::arch::riscv64::pause(),

library/stdarch/.github/workflows/main.yml

@@ -249,6 +249,43 @@ jobs:
       env:
         TARGET: ${{ matrix.target.tuple }}
 
+  intrinsic-test:
+    needs: [style]
+    name: Intrinsic Test
+    runs-on: ubuntu-latest 
+    strategy:
+      matrix:
+        target:
+          - aarch64-unknown-linux-gnu
+          - aarch64_be-unknown-linux-gnu
+          - armv7-unknown-linux-gnueabihf
+          - arm-unknown-linux-gnueabihf
+          - x86_64-unknown-linux-gnu
+        profile: [dev, release]
+        include:
+          - target: aarch64_be-unknown-linux-gnu
+            build_std: true
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Rust
+      run: |
+        rustup update nightly --no-self-update
+        rustup default nightly
+    - run: rustup target add ${{ matrix.target }}
+      if: ${{ (matrix.build_std || false) == false }}
+    - run: |
+        rustup component add rust-src
+        echo "CARGO_UNSTABLE_BUILD_STD=std" >> $GITHUB_ENV
+      if: ${{ matrix.build_std }}
+
+    # Configure some env vars based on matrix configuration
+    - run: echo "PROFILE=--profile=${{ matrix.profile }}" >> $GITHUB_ENV
+    - run: ./ci/intrinsic-test-docker.sh ${{ matrix.target }}
+      if: ${{ !startsWith(matrix.target, 'thumb') }}
+      env:
+        TARGET: ${{ matrix.target }}
+
   # Check that the generated files agree with the checked-in versions.
   check-stdarch-gen:
     needs: [style]
@@ -276,6 +313,7 @@ jobs:
       - docs
       - verify
       - test
+      - intrinsic-test
       - check-stdarch-gen
     runs-on: ubuntu-latest
     # We need to ensure this job does *not* get skipped if its dependencies fail,

library/stdarch/Cargo.lock

@@ -347,8 +347,11 @@ dependencies = [
  "itertools",
  "log",
  "pretty_env_logger",
+ "quick-xml 0.37.5",
  "rayon",
+ "regex",
  "serde",
+ "serde-xml-rs",
  "serde_json",
 ]
 
@@ -404,9 +407,9 @@ checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
 
 [[package]]
 name = "memchr"
-version = "2.7.5"
+version = "2.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
 
 [[package]]
 name = "once_cell_polyfill"
@@ -452,6 +455,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "quick-xml"
+version = "0.37.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "331e97a1af0bf59823e6eadffe373d7b27f485be8748f71471c662c1f269b7fb"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
 [[package]]
 name = "quickcheck"
 version = "1.0.3"
@@ -587,6 +600,18 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde-xml-rs"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53630160a98edebde0123eb4dfd0fce6adff091b2305db3154a9e920206eb510"
+dependencies = [
+ "log",
+ "serde",
+ "thiserror",
+ "xml-rs",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.219"
@@ -698,7 +723,7 @@ name = "stdarch-verify"
 version = "0.1.0"
 dependencies = [
  "proc-macro2",
- "quick-xml",
+ "quick-xml 0.33.0",
  "quote",
  "serde",
  "serde_json",
@@ -746,6 +771,26 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.18"
@@ -958,6 +1003,12 @@ version = "0.53.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
 
+[[package]]
+name = "xml-rs"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fd8403733700263c6eb89f192880191f1b83e332f7a20371ddcf421c4a337c7"
+
 [[package]]
 name = "yaml-rust"
 version = "0.4.5"

library/stdarch/ci/docker/wasm32-wasip1/Dockerfile

@@ -7,9 +7,9 @@ RUN apt-get update -y && apt-get install -y --no-install-recommends \
   xz-utils \
   clang
 
-ENV VERSION=v34.0.1
+ENV VERSION=v38.0.3
 
 RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/${VERSION}/wasmtime-${VERSION}-x86_64-linux.tar.xz | tar xJf -
 ENV PATH=$PATH:/wasmtime-${VERSION}-x86_64-linux
 
-ENV CARGO_TARGET_WASM32_WASIP1_RUNNER="wasmtime --dir /checkout/target/wasm32-wasip1/release/deps::."
+ENV CARGO_TARGET_WASM32_WASIP1_RUNNER="wasmtime -Wexceptions --dir /checkout/target/wasm32-wasip1/release/deps::."

library/stdarch/ci/docker/x86_64-unknown-linux-gnu/Dockerfile

@@ -6,13 +6,18 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   make \
   ca-certificates \
   wget \
-  xz-utils
+  xz-utils \
+  clang \
+  libstdc++-14-dev \
+  build-essential \
+  lld
 
 RUN wget http://ci-mirrors.rust-lang.org/stdarch/sde-external-9.58.0-2025-06-16-lin.tar.xz -O sde.tar.xz
 RUN mkdir intel-sde
 RUN tar -xJf sde.tar.xz --strip-components=1 -C intel-sde
 ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER="/intel-sde/sde64 \
             -cpuid-in /checkout/ci/docker/x86_64-unknown-linux-gnu/cpuid.def \
             -rtm-mode full -tsx --"
-# These tests fail with SDE as it doesn't support saving register data
-ENV STDARCH_TEST_SKIP_FUNCTION="xsave,xsaveopt,xsave64,xsaveopt64"
+# SDE doesn't support AMD extensions
+# FIXME: find a way to test these
+ENV STDARCH_TEST_SKIP_FEATURE="sse4a,tbm,xop"

library/stdarch/ci/docker/x86_64-unknown-linux-gnu/cpuid.def

@@ -12,7 +12,7 @@
 # CPUID_VERSION = 1.0
 #      Input      =>               Output
 # EAX      ECX    =>   EAX      EBX      ECX      EDX
-00000000 ******** => 00000024 68747541 444d4163 69746e65
+00000000 ******** => 00000024 756e6547 6c65746e 49656e69
 00000001 ******** => 00400f10 00100800 7ffaf3ff bfebfbff
 00000002 ******** => 76035a01 00f0b6ff 00000000 00c10000
 00000003 ******** => 00000000 00000000 00000000 00000000
@@ -49,7 +49,7 @@
 00000024 00000000 => 00000001 00070002 00000000 00000000 #AVX10
 00000024 00000001 => 00000000 00000000 00000004 00000000
 80000000 ******** => 80000008 00000000 00000000 00000000
-80000001 ******** => 00000000 00000000 00200961 2c100000
+80000001 ******** => 00000000 00000000 00000121 2c100000
 80000002 ******** => 00000000 00000000 00000000 00000000
 80000003 ******** => 00000000 00000000 00000000 00000000
 80000004 ******** => 00000000 00000000 00000000 00000000
@@ -59,5 +59,4 @@
 80000008 ******** => 00003028 00000200 00000200 00000000
 
 # This file was copied from intel-sde/misc/cpuid/future/cpuid.def, and modified to
-# use "AuthenticAMD" as the vendor and the support for `XOP`, `SSE4a`, `TBM`,
-# `AVX512_VP2INTERSECT` and the VEX variants of AVX512 was added in the CPUID.
+# add support for `AVX512_VP2INTERSECT`

library/stdarch/ci/intrinsic-test-docker.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env sh
+
+# Small script to run tests for a target (or all targets) inside all the
+# respective docker images.
+
+set -ex
+
+if [ $# -lt 1 ]; then
+    >&2 echo "Usage: $0 <TARGET>"
+    exit 1
+fi
+
+run() {
+    # Set the linker that is used for the host (e.g. when compiling a build.rs)
+    # This overrides any configuration in e.g. `.cargo/config.toml`, which will
+    # probably not work within the docker container.
+    HOST_LINKER="CARGO_TARGET_$(rustc --print host-tuple | tr '[:lower:]-' '[:upper:]_')_LINKER"
+
+    # Prevent `Read-only file system (os error 30)`.
+    cargo generate-lockfile
+
+    echo "Building docker container for TARGET=${1}"
+    docker build -t stdarch -f "ci/docker/${1}/Dockerfile" ci/
+    mkdir -p target c_programs rust_programs
+    echo "Running docker"
+    # shellcheck disable=SC2016
+    docker run \
+      --rm \
+      --user "$(id -u)":"$(id -g)" \
+      --env CARGO_HOME=/cargo \
+      --env CARGO_TARGET_DIR=/checkout/target \
+      --env TARGET="${1}" \
+      --env "${HOST_LINKER}"="cc" \
+      --env STDARCH_DISABLE_ASSERT_INSTR \
+      --env NOSTD \
+      --env NORUN \
+      --env RUSTFLAGS \
+      --env CARGO_UNSTABLE_BUILD_STD \
+      --volume "${HOME}/.cargo":/cargo \
+      --volume "$(rustc --print sysroot)":/rust:ro \
+      --volume "$(pwd)":/checkout:ro \
+      --volume "$(pwd)"/target:/checkout/target \
+      --volume "$(pwd)"/c_programs:/checkout/c_programs \
+      --volume "$(pwd)"/rust_programs:/checkout/rust_programs \
+      --init \
+      --workdir /checkout \
+      --privileged \
+      stdarch \
+      sh -c "HOME=/tmp PATH=\$PATH:/rust/bin exec ci/intrinsic-test.sh ${1}"
+}
+
+if [ -z "$1" ]; then
+  >&2 echo "No target specified!"
+  exit 1
+else
+  run "${1}"
+fi