name: wai-quantum CPU vector units

# The fabric's CPU vector-unit members: the gate's fixed-point arithmetic in
# the processor's own vector extension, certified bit-exact against the CPU
# reference's pinned corpus digests.
#
# - avx2 on silicon: the x86-64 processor of whichever `linux` runner takes
#   the leg. jetson-hub's has avx2 alone; framework-128gb-linux's has avx512
#   too, and there the leg declares both, as the kernel reports them, and
#   checks the avx2 member as on any other;
# - avx2 and avx512 on silicon together: framework-128gb's processor, which has
#   both, one member each;
# - sve and rvv under a user-mode emulator the job fetches and runs itself
#   (Debian's static QEMU, pinned), never the host's binfmt handler, at
#   several vector lengths each: the scalable kernels set their length per
#   pass, and every leg checks the length the member read from the unit is the
#   one the emulator was given, so a leg cannot pass at the wrong length;
# - the macOS runner, whose processor has no vector extension these kernels
#   use outside streaming mode, finding no member.
#
# Silicon for sve and rvv: a processor with them runs the same tests with no
# emulator declared.

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'push' && github.sha || github.ref }}
  cancel-in-progress: true

on:
  pull_request:
    paths:
      - 'wai/wai-quantum/**'
      - 'rust-toolchain.toml'
      - '.github/workflows/wai-quantum-vector.yml'
  schedule:
    - cron: '53 6 * * *'

jobs:
  # Does this pull request's own diff touch the paths below? This forge matches a
  # workflow's `paths:` against the push, so a merge of main into a branch fires the
  # workflow whatever the pull request changes; every job here waits on this answer.
  # A push to main, a schedule, or anything the script cannot determine answers
  # `true` (scripts/pr-touches-paths.py).
  relevant:
    name: does this change touch it
    runs-on: gate
    outputs:
      run: ${{ steps.gate.outputs.run }}
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0
      - id: gate
        run: |
          set -euo pipefail
          r=$(python3 scripts/pr-touches-paths.py .github/workflows/wai-quantum-vector.yml \
                "${{ github.event.pull_request.base.sha }}" \
                "${{ github.event.pull_request.head.sha }}")
          echo "this change touches wai-quantum-vector: $r"
          echo "run=$r" >> "$GITHUB_OUTPUT"

  vector:
    name: member · vector unit, ${{ matrix.name }}
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux
    timeout-minutes: 120
    strategy:
      fail-fast: false
      max-parallel: 1
      matrix:
        include:
          - name: avx2 (x86_64 silicon)
            target: x86_64-unknown-linux-gnu
            image: ghcr.io/cross-rs/aarch64-unknown-linux-gnu@sha256:7f8308a8734d9fcd2ebbe9a3e4bdea74af293f0799d80c3cc341e340cda49a4c
            key: cpu-vector-avx2
            bits: 256
            emulator: ''
            qemu: ''
            qemu_cpu: ''
          - name: sve 128-bit (aarch64, emulated)
            target: aarch64-unknown-linux-gnu
            image: ghcr.io/cross-rs/aarch64-unknown-linux-gnu@sha256:7f8308a8734d9fcd2ebbe9a3e4bdea74af293f0799d80c3cc341e340cda49a4c
            key: cpu-vector-sve
            bits: 128
            emulator: qemu-user 10.0.13 (Debian's static build, run by the job)
            qemu: aarch64
            qemu_cpu: max,sve-default-vector-length=16
          - name: sve 512-bit (aarch64, emulated)
            target: aarch64-unknown-linux-gnu
            image: ghcr.io/cross-rs/aarch64-unknown-linux-gnu@sha256:7f8308a8734d9fcd2ebbe9a3e4bdea74af293f0799d80c3cc341e340cda49a4c
            key: cpu-vector-sve
            bits: 512
            emulator: qemu-user 10.0.13 (Debian's static build, run by the job)
            qemu: aarch64
            qemu_cpu: max,sve-default-vector-length=64
          - name: sve 2048-bit (aarch64, emulated)
            target: aarch64-unknown-linux-gnu
            image: ghcr.io/cross-rs/aarch64-unknown-linux-gnu@sha256:7f8308a8734d9fcd2ebbe9a3e4bdea74af293f0799d80c3cc341e340cda49a4c
            key: cpu-vector-sve
            bits: 2048
            emulator: qemu-user 10.0.13 (Debian's static build, run by the job)
            qemu: aarch64
            qemu_cpu: max,sve-default-vector-length=256
          - name: rvv 128-bit (riscv64, emulated)
            target: riscv64gc-unknown-linux-gnu
            image: ghcr.io/cross-rs/riscv64gc-unknown-linux-gnu@sha256:67ee97dd4719390d299edfcf39f226360ccfb1539e08b078ec187d4848415794
            key: cpu-vector-rvv
            bits: 128
            emulator: qemu-user 10.0.13 (Debian's static build, run by the job)
            qemu: riscv64
            qemu_cpu: rv64,v=true,vlen=128,elen=64
          - name: rvv 1024-bit (riscv64, emulated)
            target: riscv64gc-unknown-linux-gnu
            image: ghcr.io/cross-rs/riscv64gc-unknown-linux-gnu@sha256:67ee97dd4719390d299edfcf39f226360ccfb1539e08b078ec187d4848415794
            key: cpu-vector-rvv
            bits: 1024
            emulator: qemu-user 10.0.13 (Debian's static build, run by the job)
            qemu: riscv64
            qemu_cpu: rv64,v=true,vlen=1024,elen=64
    container:
      image: ${{ matrix.image }}
      options: --memory=6g --memory-swap=6g
    env:
      WAI_QUANTUM_VECTOR_EXPECT: ${{ matrix.key }}
      WAI_QUANTUM_VECTOR_EMULATOR: ${{ matrix.emulator }}
      # The emulator every foreign test binary runs under: Debian's static QEMU,
      # SHA-256 pinned, fetched by the job and named as cargo's runner. Not the
      # image's own (5.1 for aarch64, 6.1 for riscv64), and not the host's binfmt
      # handler, which some `linux` runners lack and others run at another
      # version. (Not QEMU_*: qemu-user reads every QEMU_<option> variable as that
      # option.)
      USER_EMULATOR_VERSION: 10.0.13
      USER_EMULATOR_DEB: qemu-user_10.0.13+ds-0+deb13u1_amd64.deb
      USER_EMULATOR_SHA256: ca6ede739327a20ae5a3498230c8a3a9a072c586e131bc6bcc1201eb1725e336
      USER_EMULATOR_SHA1: dec1373851d29f91642c197f4a339d0d2ad25ed0
    steps:
      # The image has no Node for a checkout action: the forge's archive of the
      # exact commit, its embedded commit id checked.
      - name: Fetch the source
        shell: bash
        run: |
          set -euo pipefail
          want="${{ github.event.pull_request.head.sha || github.sha }}"
          rm -rf src src.tar.gz src.tar && mkdir src
          curl -sSf -o src.tar.gz "http://100.64.224.0:3400/Transaction-Science/open-standards/archive/$want.tar.gz"
          gzip -dc src.tar.gz > src.tar
          got="$(git get-tar-commit-id < src.tar)"
          [ "$got" = "$want" ] || { echo "::error::the archive is of $got, not $want"; exit 1; }
          # -m: every file gets the time it was extracted, not its commit's. The build
          # reuses a target directory kept between runs, and cargo takes a crate as
          # built when no source file is newer than its last build: with the commit's
          # times, an older commit ran the binary another commit had built there.
          tar -xmf src.tar -C src --strip-components=1
          rm src.tar.gz src.tar
      - name: The member's tests
        shell: bash
        working-directory: src/wai/wai-quantum
        run: |
          set -euo pipefail
          cache=/ci-cache/wai-quantum-vector
          mkdir -p "$cache"
          exec 9>"$cache/.lock"
          flock 9
          # Every source file newer than every build in the cache, now that the lock is
          # held: another run may have built here while this one waited for it, after
          # this one's extraction. (../.. is the extracted tree.)
          find ../.. -type f -exec touch {} +
          export RUSTUP_HOME="$cache/rustup" CARGO_HOME="$cache/cargo" CARGO_TARGET_DIR="$cache/target-${{ matrix.target }}"
          export PATH="$CARGO_HOME/bin:$PATH"
          if ! command -v rustup >/dev/null; then
            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --profile minimal --default-toolchain none
          fi
          rustup toolchain install
          rustup target add ${{ matrix.target }}
          # The emulated processor, for the test binaries only.
          if [ -n "${{ matrix.qemu_cpu }}" ]; then export QEMU_CPU="${{ matrix.qemu_cpu }}"; fi
          # A trivial program for the preflight below: it prints the machine it runs on.
          cat > "$RUNNER_TEMP/probe.c" <<'EOF'
          #include <stdio.h>
          #include <sys/utsname.h>
          int main(void) { struct utsname u; if (uname(&u) != 0) return 1; printf("%s\n", u.machine); return 0; }
          EOF
          if [ -n "${{ matrix.qemu }}" ]; then
            # The emulator, fetched once per host into the cache (under the lock above)
            # and checked against its pin, then named as cargo's runner, so this leg
            # passes or fails the same on every `linux` runner.
            q="$cache/qemu-user-$USER_EMULATOR_VERSION"
            if [ ! -x "$q/qemu-aarch64" ] || [ ! -x "$q/qemu-riscv64" ]; then
              d="$cache/qemu-user-fetch"; rm -rf "$d" && mkdir "$d"
              curl -sSfL -o "$d/$USER_EMULATOR_DEB" "https://deb.debian.org/debian/pool/main/q/qemu/$USER_EMULATOR_DEB" \
                || curl -sSfL -o "$d/$USER_EMULATOR_DEB" "https://snapshot.debian.org/file/$USER_EMULATOR_SHA1"
              echo "$USER_EMULATOR_SHA256  $d/$USER_EMULATOR_DEB" | sha256sum -c -
              dpkg-deb --fsys-tarfile "$d/$USER_EMULATOR_DEB" | tar -x -C "$d" ./usr/bin/qemu-aarch64 ./usr/bin/qemu-riscv64
              rm -rf "$q.tmp" && mkdir "$q.tmp" && mv "$d/usr/bin/qemu-aarch64" "$d/usr/bin/qemu-riscv64" "$q.tmp/"
              rm -rf "$q" && mv "$q.tmp" "$q" && rm -rf "$d"
            fi
            runner="$q/qemu-${{ matrix.qemu }} -L /usr/${{ matrix.qemu }}-linux-gnu"
            export "CARGO_TARGET_$(printf %s "${{ matrix.target }}" | tr 'a-z-' 'A-Z_')_RUNNER=$runner"
            # Preflight: the trivial program, built for the target and run as cargo will
            # run the tests. An emulator that cannot run it fails the leg here, saying
            # so, rather than as a test that never ran.
            "${{ matrix.qemu }}-linux-gnu-gcc" -o "$RUNNER_TEMP/probe" "$RUNNER_TEMP/probe.c"
            got="$($runner "$RUNNER_TEMP/probe")" || { echo "::error::the emulator cannot run a program for ${{ matrix.target }}: $runner"; exit 1; }
            [ "$got" = "${{ matrix.qemu }}" ] || { echo "::error::the preflight program ran as $got, not ${{ matrix.qemu }}"; exit 1; }
            echo "emulator: $("$q/qemu-${{ matrix.qemu }}" --version | head -1), cpu ${QEMU_CPU:-default}; a program for ${{ matrix.target }} runs under it"
          fi
          # Every unit this processor has must be declared, so on silicon the
          # declaration comes from the kernel's own flags, not the probe under test.
          if [ "${{ matrix.key }}" = cpu-vector-avx2 ] && grep -qw avx512f /proc/cpuinfo; then
            export WAI_QUANTUM_VECTOR_EXPECT=cpu-vector-avx2,cpu-vector-avx512
          fi
          t="--target ${{ matrix.target }} --features quantum_fabric_vector"
          cargo test --locked --release -j 6 $t --lib -- quantum_fabric_vector:: 2>&1 | tee "$cache/unit.log"
          # The first build after the refresh compiles wai-quantum; one that compiled
          # none ran a binary another commit left in the cache.
          grep -qE '^ *Compiling wai-quantum v[0-9]' "$cache/unit.log" || { echo "::error::the build compiled no wai-quantum: its tests ran a binary already in the cache"; exit 1; }
          grep -qE '^test result: ok\. [1-9][0-9]* passed; 0 failed' "$cache/unit.log" || { echo "::error::no unit test ran"; exit 1; }
          report="$(mktemp)"
          WAI_QUANTUM_VECTOR_REPORT="$report" cargo test --locked --release -j 6 $t --test vector_member -- --test-threads=1 2>&1 | tee "$cache/device.log"
          grep -qE '^test result: ok\. 9 passed; 0 failed' "$cache/device.log" || { echo "::error::not every device test ran and passed"; exit 1; }
          cat "$report"
          key="${{ matrix.key }}"
          grep -qx "vector devices: as declared ($WAI_QUANTUM_VECTOR_EXPECT)" "$report" || { echo "::error::the units found are not the declared ones"; exit 1; }
          grep -q "^vector member: key=$key .* bits=${{ matrix.bits }} " "$report" || { echo "::error::the unit's vector length is not ${{ matrix.bits }} bits"; exit 1; }
          if [ -n "$WAI_QUANTUM_VECTOR_EMULATOR" ]; then
            grep -q "^vector member: key=$key .*emulator:qemu-user" "$report" || { echo "::error::the member does not say it ran under the emulator"; exit 1; }
          else
            grep -q "^vector member: key=$key .*; silicon;" "$report" || { echo "::error::the member does not say it ran on silicon"; exit 1; }
          fi
          n="$(grep -c "^vector certified: key=$key .* parity=bit-exact " "$report")"
          [ "$n" = 4 ] || { echo "::error::$n of 4 certificates were earned"; exit 1; }
          grep -qx "vector mutants: key=$key killed 3 of 3" "$report" || { echo "::error::a kernel mutant survived"; exit 1; }

  vector-amd:
    name: member · vector units, avx2 and avx512 (framework-128gb silicon)
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux-amd
    timeout-minutes: 60
    env:
      CARGO_PROFILE_DEV_DEBUG: '0'
      CARGO_BUILD_JOBS: '12'
    steps:
      - name: Fetch the source
        shell: bash
        run: |
          set -euo pipefail
          want="${{ github.event.pull_request.head.sha || github.sha }}"
          rm -rf src && mkdir src && cd src
          git init -q
          # Fetch the commit itself, not the ref. The host names its own route to
          # the forge (WAI_FORGE_URL).
          git fetch -q --depth 1 "${WAI_FORGE_URL:-http://100.64.224.0:3400}/Transaction-Science/open-standards.git" "$want"
          git checkout -q FETCH_HEAD
          got="$(git rev-parse HEAD)"
          [ "$got" = "$want" ] || { echo "::error::fetched $got, not $want"; exit 1; }
      - name: Both units on silicon
        shell: bash
        working-directory: src/wai/wai-quantum
        run: |
          set -euo pipefail
          export PATH="$HOME/.cargo/bin:$PATH"
          export CARGO_TARGET_DIR="$HOME/hw-target/wai-quantum-vector"
          # The units this host's processor has, declared here (or by the runner).
          export WAI_QUANTUM_VECTOR_EXPECT="${WAI_QUANTUM_AMD_VECTOR_EXPECT:-cpu-vector-avx2,cpu-vector-avx512}"
          nice -n 10 cargo test --locked --release --features quantum_fabric_vector --lib -- quantum_fabric_vector:: 2>&1 | tee "$RUNNER_TEMP/unit.log"
          grep -qE '^test result: ok\. [1-9][0-9]* passed; 0 failed' "$RUNNER_TEMP/unit.log" || { echo "::error::no unit test ran"; exit 1; }
          report="$RUNNER_TEMP/vector-report.txt"; : > "$report"
          WAI_QUANTUM_VECTOR_REPORT="$report" nice -n 10 cargo test --locked --release --features quantum_fabric_vector --test vector_member -- --test-threads=1 2>&1 | tee "$RUNNER_TEMP/device.log"
          grep -qE '^test result: ok\. 9 passed; 0 failed' "$RUNNER_TEMP/device.log" || { echo "::error::not every device test ran and passed"; exit 1; }
          cat "$report"
          grep -qx "vector devices: as declared ($WAI_QUANTUM_VECTOR_EXPECT)" "$report" || { echo "::error::the units found are not the declared ones"; exit 1; }
          for key in ${WAI_QUANTUM_VECTOR_EXPECT//,/ }; do
            case "$key" in cpu-vector-avx2) bits=256 ;; cpu-vector-avx512) bits=512 ;; *) echo "::error::no vector length known for $key"; exit 1 ;; esac
            grep -q "^vector member: key=$key .* bits=$bits .*; silicon;" "$report" || { echo "::error::$key: not $bits bits on silicon"; exit 1; }
            n="$(grep -c "^vector certified: key=$key .* parity=bit-exact " "$report")"
            [ "$n" = 4 ] || { echo "::error::$key: $n of 4 certificates were earned"; exit 1; }
            grep -qx "vector mutants: key=$key killed 3 of 3" "$report" || { echo "::error::$key: a kernel mutant survived"; exit 1; }
          done

  vector-absent:
    name: member · vector unit absent (macos)
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: macos
    timeout-minutes: 60
    env:
      WAI_QUANTUM_VECTOR_EXPECT: none
    steps:
      - uses: actions/checkout@v5
      # launchd's PATH omits cargo on the macOS host runner.
      - name: Put cargo on PATH
        shell: bash
        run: echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
      - name: No vector unit these kernels use, and the member says so
        shell: bash
        working-directory: wai/wai-quantum
        run: |
          set -euo pipefail
          report="$RUNNER_TEMP/vector-report.txt"; : > "$report"
          nice -n 10 cargo test --locked --features quantum_fabric_vector --lib -- quantum_fabric_vector:: 2>&1 | tee "$RUNNER_TEMP/unit.log"
          grep -qE '^test result: ok\. [1-9][0-9]* passed; 0 failed' "$RUNNER_TEMP/unit.log" || { echo "::error::no unit test ran"; exit 1; }
          WAI_QUANTUM_VECTOR_REPORT="$report" nice -n 10 cargo test --locked --features quantum_fabric_vector --test vector_member -- --test-threads=1 2>&1 | tee "$RUNNER_TEMP/device.log"
          grep -qE '^test result: ok\. 9 passed; 0 failed' "$RUNNER_TEMP/device.log" || { echo "::error::not every device test ran and passed"; exit 1; }
          grep -qx 'vector devices: as declared (none)' "$report" || { echo "::error::the absent case was not established"; exit 1; }