Add more workflow architecture coverage

Adds aarch64, x86, powerpc, and powerpc64.

Author: onethumb

.github/workflows/tests.yml

@@ -6,14 +6,16 @@ on:
   workflow_dispatch:
 
 jobs:
-  test:
-    runs-on: ubuntu-latest
+  test-accelerated:
+    name: Test accelerated architectures (aarch64, x86_64)
     strategy:
       matrix:
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest]
         rust-toolchain:
           - "1.81" # minimum for this crate
           - "stable"
           - "nightly"
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4 # not pinning to commit hash since this is a GitHub action, which we trust
       - uses: actions-rust-lang/setup-rust-toolchain@9d7e65c320fdb52dcd45ffaa68deb6c02c8754d9 # v1.12.0
@@ -35,4 +37,54 @@ jobs:
       - name: Test
         run: cargo test
       - name: Test (Optimized)
-        run: cargo test --features=optimize_crc32_auto
+        run: cargo test --features=optimize_crc32_auto
+
+  test-x86:
+    name:  Test accelerated architectures (x86)
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [i586-unknown-linux-gnu, i686-unknown-linux-gnu]
+        rust-toolchain:
+          - "1.81" # minimum for this crate
+          - "stable"
+          - "nightly"
+    steps:
+      - uses: actions/checkout@v4 # not pinning to commit hash since this is a GitHub action, which we trust
+      - uses: actions-rust-lang/setup-rust-toolchain@9d7e65c320fdb52dcd45ffaa68deb6c02c8754d9 # v1.12.0
+        with:
+          toolchain: ${{ matrix.rust-toolchain }}
+          components: rustfmt, clippy
+      - name: Set up cross
+        run: cargo install cross --locked --version 0.2.5
+      - name: Check
+        run: cross check --target ${{ matrix.target }}
+      - name: Test
+        run: cross test --target ${{ matrix.target }}
+      - name: Test (Optimized)
+        run: cargo test --features=optimize_crc32_auto --target ${{ matrix.target }}
+        
+  test-software:
+    name: Test software fallback architectures
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [powerpc-unknown-linux-gnu, powerpc64-unknown-linux-gnu]
+        rust-toolchain:
+          - "1.81" # minimum for this crate
+          - "stable"
+          - "nightly"
+    steps:
+      - uses: actions/checkout@v4 # not pinning to commit hash since this is a GitHub action, which we trust
+      - uses: actions-rust-lang/setup-rust-toolchain@9d7e65c320fdb52dcd45ffaa68deb6c02c8754d9 # v1.12.0
+        with:
+          toolchain: ${{ matrix.rust-toolchain }}
+          components: rustfmt, clippy
+      - name: Set up cross
+        run: cargo install cross --locked --version 0.2.5
+      - name: Check
+        run: cross check --target ${{ matrix.target }}
+      - name: Test
+        run: cross test --target ${{ matrix.target }}
+      - name: Test (Optimized)
+        run: cargo test --features=optimize_crc32_auto --target ${{ matrix.target }}