metal lowbit ops: ci (#1825)

Author: manuelcandales

.github/workflows/torchao_experimental_test.yml

@@ -11,7 +11,7 @@ on:
       - 'gh/**'
 
 jobs:
-  test:
+  test-cpu-ops:
     strategy:
       matrix:
         runner: [macos-14]
@@ -56,3 +56,54 @@ jobs:
           sh build_and_run_tests.sh
           rm -rf /tmp/cmake-out
           popd
+
+  test-mps-ops:
+    strategy:
+      matrix:
+        runner: [macos-m1-stable]
+    runs-on: ${{matrix.runner}}
+    steps:
+      - name: Print machine info
+        run: |
+          uname -a
+          if [ $(uname -s) == Darwin ]; then
+            sysctl machdep.cpu.brand_string
+            sysctl machdep.cpu.core_count
+          fi
+      - name: Checkout repo
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+      - name: Create conda env
+        run: |
+          conda create -yn test-mps-ops-env python=3.11
+      - name: Activate conda env
+        run: |
+          source activate base
+          conda activate test-mps-ops-env
+      - name: Install torch
+        run: |
+          pip install torch --index-url "https://download.pytorch.org/whl/nightly/cpu"
+      - name: Print torch version
+        run: |
+          python -c "import torch; print(torch.__version__)"
+      - name: Install requirements
+        run: |
+          pip install cmake
+          pip install parameterized
+          pip install pyyaml
+      - name: Print pip freeze
+        run: |
+          pip freeze
+      - name: Print current directory
+        run: |
+          python -c "import os; print(os.getcwd())"
+      - name: Build ao with experimental mps ops
+        run: |
+          USE_CPP=1 TORCHAO_BUILD_EXPERIMENTAL_MPS=1 pip install .
+      - name: Run mps tests
+        run: |
+          pushd torchao/experimental/ops/mps/test
+          python test_lowbit.py
+          python test_quantizer.py
+          popd