Merge pull request #864 from dfinity/andriy/run-975-simd-example

feat: RUN-975: Add WebAssembly SIMD example

Author: dfinity-berestovskyy

Diff for: .github/workflows/rust-simd-example.yaml

@@ -0,0 +1,44 @@
+name: rust-simd
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    paths:
+      - rust/simd/**
+      - .github/workflows/provision-darwin.sh
+      - .github/workflows/provision-linux.sh
+      - .github/workflows/rust-simd-example.yaml
+      - .ic-commit
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  rust-simd-example-darwin:
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v1
+      - name: Provision Darwin
+        run: DFX_VERSION="0.20.2-beta.0" bash .github/workflows/provision-darwin.sh
+      - name: Remove networks.json
+        run: rm -f ~/.config/dfx/networks.json
+      - name: Rust SIMD Darwin
+        run: |
+          dfx start --background
+          pushd rust/simd
+          make test
+          popd
+  rust-simd-example-linux:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v1
+      - name: Provision Linux
+        run: DFX_VERSION="0.20.2-beta.0" bash .github/workflows/provision-linux.sh
+      - name: Remove networks.json
+        run: rm -f ~/.config/dfx/networks.json
+      - name: Rust SIMD Linux
+        run: |
+          dfx start --background
+          pushd rust/simd
+          make test
+          popd

Diff for: rust/simd/.cargo/config.toml

@@ -0,0 +1,25 @@
+[build]
+target = ["wasm32-unknown-unknown"]
+
+[target.wasm32-unknown-unknown]
+# This example compares the performance of the same function compiled
+# with and without WebAssembly SIMD support. SIMD instructions are
+# globally disabled, and enabled just for specific functions using
+# the `target_feature` attribute:
+#
+# ```rust
+# #[target_feature(enable = "simd128")]
+# #[ic_cdk_macros::query]
+# fn auto_vectorized_f32() -> u64 {
+# ```
+#
+# In most cases, there's no need to annotate functions or even change
+# the source code. To enable WebAssembly SIMD instructions globally,
+# for the whole workspace and all its dependencies, just uncomment
+# the following line:
+#
+# rustflags = ["-C", "target-feature=+simd128"]
+#
+# Note, enabling WebAssembly SIMD instructions enables Rust loop
+# auto-vectorization. This option might be enabled by default in future
+# `dfx` versions.