rust-lang · madhav-madhusoodanan · Oct 18, 2025
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -248,6 +248,74 @@ jobs:
       if: matrix.target.os == 'ubuntu-latest' && !startsWith(matrix.target.tuple, 'thumb')
       env:
         TARGET: ${{ matrix.target.tuple }}
+
+  intrinsic-test:
+    needs: [style]
+    name: Intrinsic Test
+    runs-on: ${{ matrix.target.os }}
+    strategy:
+      matrix:
+        profile:
+        - dev
+        - release
+        target:
+        # Dockers that are run through docker on linux
+        - tuple: arm-unknown-linux-gnueabihf
+          os: ubuntu-latest
+        - tuple: armv7-unknown-linux-gnueabihf
+          os: ubuntu-latest
+        - tuple: aarch64-unknown-linux-gnu
+          os: ubuntu-latest
+        - tuple: aarch64_be-unknown-linux-gnu
+          os: ubuntu-latest
+
+        # Add additional variables to the matrix variations generated above using `include`:
+        include:
+        # `TEST_EVERYTHING` setups - there should be at least 1 for each architecture
+        - target:
+            tuple: aarch64-unknown-linux-gnu
+            os: ubuntu-latest
+          test_everything: true
+        - target:
+            tuple: aarch64_be-unknown-linux-gnu
+            os: ubuntu-latest
+          test_everything: true
+          build_std: true
+        - target:
+            tuple: armv7-unknown-linux-gnueabihf
+            os: ubuntu-latest
+          test_everything: true
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Rust
+      run: |
+        rustup update nightly --no-self-update
+        rustup default nightly
+      shell: bash
+    - run: rustup target add ${{ matrix.target.tuple }}
+      shell: bash
+      if: matrix.build_std == ''
+    - run: |
+        rustup component add rust-src
+        echo "CARGO_UNSTABLE_BUILD_STD=std" >> $GITHUB_ENV
+      shell: bash
+      if: matrix.build_std != ''
+
+    # Configure some env vars based on matrix configuration
+    - run: echo "PROFILE=--profile=${{matrix.profile}}" >> $GITHUB_ENV
+      shell: bash
+    - run: echo "STDARCH_TEST_EVERYTHING=1" >> $GITHUB_ENV
+      shell: bash
+      if: matrix.test_everything != ''
+    - run: echo "STDARCH_DISABLE_ASSERT_INSTR=1" >> $GITHUB_ENV
+      shell: bash
+      if: matrix.disable_assert_instr != ''
+    - run: ./ci/intrinsic-test-docker.sh ${{ matrix.target.tuple }}
+      shell: bash
+      if: matrix.target.os == 'ubuntu-latest' && !startsWith(matrix.target.tuple, 'thumb')
+      env:
+        TARGET: ${{ matrix.target.tuple }}
 
   # Check that the generated files agree with the checked-in versions.
   check-stdarch-gen:
@@ -276,6 +344,7 @@ 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,

diff --git a/ci/intrinsic-test-docker.sh b/ci/intrinsic-test-docker.sh
@@ -0,0 +1,58 @@
+#!/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_TEST_EVERYTHING \
+      --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
diff --git a/ci/intrinsic-test.sh b/ci/intrinsic-test.sh
@@ -0,0 +1,114 @@
+#!/usr/bin/env sh
+
+set -ex
+
+: "${TARGET?The TARGET environment variable must be set.}"
+
+# Tests are all super fast anyway, and they fault often enough on travis that
+# having only one thread increases debuggability to be worth it.
+#export RUST_BACKTRACE=full
+#export RUST_TEST_NOCAPTURE=1
+#export RUST_TEST_THREADS=1
+
+export RUSTFLAGS="${RUSTFLAGS} -D warnings -Z merge-functions=disabled -Z verify-llvm-ir"
+export HOST_RUSTFLAGS="${RUSTFLAGS}"
+export PROFILE="${PROFILE:="--profile=release"}"
+
+case ${TARGET} in
+    # On 32-bit use a static relocation model which avoids some extra
+    # instructions when dealing with static data, notably allowing some
+    # instruction assertion checks to pass below the 20 instruction limit. If
+    # this is the default, dynamic, then too many instructions are generated
+    # when we assert the instruction for a function and it causes tests to fail.
+    i686-* | i586-*)
+        export RUSTFLAGS="${RUSTFLAGS} -C relocation-model=static"
+        ;;
+    # Some x86_64 targets enable by default more features beyond SSE2,
+    # which cause some instruction assertion checks to fail.
+    x86_64-*)
+        export RUSTFLAGS="${RUSTFLAGS} -C target-feature=-sse3"
+        ;;
+    #Unoptimized build uses fast-isel which breaks with msa
+    mips-* | mipsel-*)
+	export RUSTFLAGS="${RUSTFLAGS} -C llvm-args=-fast-isel=false"
+	;;
+    armv7-*eabihf | thumbv7-*eabihf)
+        export RUSTFLAGS="${RUSTFLAGS} -Ctarget-feature=+neon"
+        ;;
+    # Some of our test dependencies use the deprecated `gcc` crates which
+    # doesn't detect RISC-V compilers automatically, so do it manually here.
+    riscv*)
+        export RUSTFLAGS="${RUSTFLAGS} -Ctarget-feature=+zk,+zks,+zbb,+zbc"
+        ;;
+esac
+
+echo "RUSTFLAGS=${RUSTFLAGS}"
+echo "OBJDUMP=${OBJDUMP}"
+echo "STDARCH_DISABLE_ASSERT_INSTR=${STDARCH_DISABLE_ASSERT_INSTR}"
+echo "STDARCH_TEST_EVERYTHING=${STDARCH_TEST_EVERYTHING}"
+echo "STDARCH_TEST_SKIP_FEATURE=${STDARCH_TEST_SKIP_FEATURE}"
+echo "STDARCH_TEST_SKIP_FUNCTION=${STDARCH_TEST_SKIP_FUNCTION}"
+echo "PROFILE=${PROFILE}"
+
+INTRINSIC_TEST="--manifest-path=crates/intrinsic-test/Cargo.toml"
+
+# Test targets compiled with extra features.
+case ${TARGET} in
+
+    x86_64* | i686*)
+        export STDARCH_DISABLE_ASSERT_INSTR=1
+        ;;
+
+    # Setup aarch64 & armv7 specific variables, the runner, along with some
+    # tests to skip
+    aarch64-unknown-linux-gnu*)
+        TEST_CPPFLAGS="-fuse-ld=lld -I/usr/aarch64-linux-gnu/include/ -I/usr/aarch64-linux-gnu/include/c++/9/aarch64-linux-gnu/"
+        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_aarch64.txt
+        TEST_CXX_COMPILER="clang++"
+        TEST_RUNNER="${CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUNNER}"
+        ;;
+
+    aarch64_be-unknown-linux-gnu*)
+        TEST_CPPFLAGS="-fuse-ld=lld"
+        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_aarch64.txt
+        TEST_CXX_COMPILER="clang++"
+        TEST_RUNNER="${CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_RUNNER}"
+        ;;
+
+    armv7-unknown-linux-gnueabihf*)
+        TEST_CPPFLAGS="-fuse-ld=lld -I/usr/arm-linux-gnueabihf/include/ -I/usr/arm-linux-gnueabihf/include/c++/9/arm-linux-gnueabihf/"
+        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_arm.txt
+        TEST_CXX_COMPILER="clang++"
+        TEST_RUNNER="${CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_RUNNER}"
+        ;;
+    *)
+        ;;
+
+esac
+
+# Arm specific
+case "${TARGET}" in
+    aarch64-unknown-linux-gnu*|armv7-unknown-linux-gnueabihf*)
+        CPPFLAGS="${TEST_CPPFLAGS}" RUSTFLAGS="${HOST_RUSTFLAGS}" RUST_LOG=warn \
+            cargo run "${INTRINSIC_TEST}" "${PROFILE}" \
+            --bin intrinsic-test -- intrinsics_data/arm_intrinsics.json \
+            --runner "${TEST_RUNNER}" \
+            --cppcompiler "${TEST_CXX_COMPILER}" \
+            --skip "${TEST_SKIP_INTRINSICS}" \
+            --target "${TARGET}"
+        ;;
+
+    aarch64_be-unknown-linux-gnu*)
+        CPPFLAGS="${TEST_CPPFLAGS}" RUSTFLAGS="${HOST_RUSTFLAGS}" RUST_LOG=warn \
+            cargo run "${INTRINSIC_TEST}" "${PROFILE}"  \
+            --bin intrinsic-test -- intrinsics_data/arm_intrinsics.json \
+            --runner "${TEST_RUNNER}" \
+            --cppcompiler "${TEST_CXX_COMPILER}" \
+            --skip "${TEST_SKIP_INTRINSICS}" \
+            --target "${TARGET}" \
+            --linker "${CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_LINKER}" \
+            --cxx-toolchain-dir "${AARCH64_BE_TOOLCHAIN}"
+        ;;
+     *)
+        ;;
+esac
diff --git a/ci/run.sh b/ci/run.sh
@@ -79,7 +79,6 @@ cargo_test() {
 
 CORE_ARCH="--manifest-path=crates/core_arch/Cargo.toml"
 STDARCH_EXAMPLES="--manifest-path=examples/Cargo.toml"
-INTRINSIC_TEST="--manifest-path=crates/intrinsic-test/Cargo.toml"
 
 cargo_test "${CORE_ARCH} ${PROFILE}"
 
@@ -130,61 +129,11 @@ case ${TARGET} in
         export RUSTFLAGS="${RUSTFLAGS} -C target-feature=+altivec"
         cargo_test "${PROFILE}"
         ;;
-
-    # Setup aarch64 & armv7 specific variables, the runner, along with some
-    # tests to skip
-    aarch64-unknown-linux-gnu*)
-        TEST_CPPFLAGS="-fuse-ld=lld -I/usr/aarch64-linux-gnu/include/ -I/usr/aarch64-linux-gnu/include/c++/9/aarch64-linux-gnu/"
-        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_aarch64.txt
-        TEST_CXX_COMPILER="clang++"
-        TEST_RUNNER="${CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUNNER}"
-        ;;
-
-    aarch64_be-unknown-linux-gnu*)
-        TEST_CPPFLAGS="-fuse-ld=lld"
-        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_aarch64.txt
-        TEST_CXX_COMPILER="clang++"
-        TEST_RUNNER="${CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_RUNNER}"
-        ;;
-
-    armv7-unknown-linux-gnueabihf*)
-        TEST_CPPFLAGS="-fuse-ld=lld -I/usr/arm-linux-gnueabihf/include/ -I/usr/arm-linux-gnueabihf/include/c++/9/arm-linux-gnueabihf/"
-        TEST_SKIP_INTRINSICS=crates/intrinsic-test/missing_arm.txt
-        TEST_CXX_COMPILER="clang++"
-        TEST_RUNNER="${CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_RUNNER}"
-        ;;
     *)
         ;;
 
 esac
 
-# Arm specific
-case "${TARGET}" in
-    aarch64-unknown-linux-gnu*|armv7-unknown-linux-gnueabihf*)
-        CPPFLAGS="${TEST_CPPFLAGS}" RUSTFLAGS="${HOST_RUSTFLAGS}" RUST_LOG=warn \
-            cargo run "${INTRINSIC_TEST}" "${PROFILE}" \
-            --bin intrinsic-test -- intrinsics_data/arm_intrinsics.json \
-            --runner "${TEST_RUNNER}" \
-            --cppcompiler "${TEST_CXX_COMPILER}" \
-            --skip "${TEST_SKIP_INTRINSICS}" \
-            --target "${TARGET}"
-        ;;
-
-    aarch64_be-unknown-linux-gnu*)
-        CPPFLAGS="${TEST_CPPFLAGS}" RUSTFLAGS="${HOST_RUSTFLAGS}" RUST_LOG=warn \
-            cargo run "${INTRINSIC_TEST}" "${PROFILE}"  \
-            --bin intrinsic-test -- intrinsics_data/arm_intrinsics.json \
-            --runner "${TEST_RUNNER}" \
-            --cppcompiler "${TEST_CXX_COMPILER}" \
-            --skip "${TEST_SKIP_INTRINSICS}" \
-            --target "${TARGET}" \
-            --linker "${CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_LINKER}" \
-            --cxx-toolchain-dir "${AARCH64_BE_TOOLCHAIN}"
-        ;;
-     *)
-        ;;
-esac
-
 if [ "$NORUN" != "1" ] && [ "$NOSTD" != 1 ]; then
     # Test examples
     (