Start testing runtime execution of wasm32 simd intrinsics

ci/docker/wasm32-unknown-unknown/Dockerfile

@@ -1,3 +1,18 @@
+FROM ubuntu:18.04 as node
+
+RUN apt-get update -y && apt-get install -y \
+  g++ \
+  git \
+  make \
+  python
+
+
+# Install `node`
+RUN git clone https://github.com/nodejs/node --depth 1
+WORKDIR node
+RUN ./configure --prefix=/node-install
+RUN make -j$(nproc) install
+
 FROM ubuntu:18.04
 
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
@@ -16,12 +31,8 @@ RUN git clone --recursive https://github.com/WebAssembly/wabt
 RUN make -C wabt -j$(nproc)
 ENV PATH=$PATH:/wabt/bin
 
-# Install `wasm-bindgen-test-runner`
-RUN curl -L https://github.com/rustwasm/wasm-bindgen/releases/download/0.2.19/wasm-bindgen-0.2.19-x86_64-unknown-linux-musl.tar.gz \
-  | tar xzf -
-ENV PATH=$PATH:/wasm-bindgen-0.2.19-x86_64-unknown-linux-musl
-ENV CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUNNER=wasm-bindgen-test-runner
+COPY --from=node /node-install /
+ENV PATH=$PATH:/node-install/bin
 
-# Install `node`
-RUN curl https://nodejs.org/dist/v10.8.0/node-v10.8.0-linux-x64.tar.xz | tar xJf -
-ENV PATH=$PATH:/node-v10.8.0-linux-x64/bin
+COPY docker/wasm32-unknown-unknown/wasm-entrypoint.sh /wasm-entrypoint.sh
+ENTRYPOINT ["/wasm-entrypoint.sh"]

ci/docker/wasm32-unknown-unknown/wasm-entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -e
+
+# Download an appropriate version of wasm-bindgen based off of what's being used
+# in the lock file. Ideally we'd use `wasm-pack` at some point for this!
+version=$(grep -A 1 'name = "wasm-bindgen"' Cargo.lock | grep version)
+version=$(echo $version | awk '{print $3}' | sed 's/"//g')
+curl -L https://github.com/rustwasm/wasm-bindgen/releases/download/$version/wasm-bindgen-$version-x86_64-unknown-linux-musl.tar.gz \
+   | tar xzf - -C target
+export PATH=$PATH:`pwd`/target/wasm-bindgen-$version-x86_64-unknown-linux-musl
+export CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUNNER=wasm-bindgen-test-runner
+export NODE_ARGS=--experimental-wasm-simd
+
+exec "$@"

ci/run.sh

@@ -51,6 +51,7 @@ STD_DETECT="--manifest-path=crates/std_detect/Cargo.toml"
 STDSIMD_EXAMPLES="--manifest-path=examples/Cargo.toml"
 cargo_test "${CORE_ARCH}"
 cargo_test "${CORE_ARCH} --release"
+
 if [ "$NOSTD" != "1" ]; then
     cargo_test "${STD_DETECT}"
     cargo_test "${STD_DETECT} --release"
@@ -72,10 +73,15 @@ case ${TARGET} in
         cargo_test "--release"
         ;;
     wasm32-unknown-unknown*)
-        # There's no node or other runtime which supports the most recent SIMD
-        # proposal, but hopefully that's coming soon! For now just test that we
-        # can codegen with no LLVM faults, and we'll remove `--no-run` at a
-        # later date.
+        # Attempt to actually run some SIMD tests in node.js. Unfortunately
+        # though node.js (transitively through v8) doesn't have support for the
+        # full SIMD spec yet, only some functions. As a result only pass in
+        # some target features and a special `--cfg`
+        export RUSTFLAGS="${RUSTFLAGS} -C target-feature=+simd128 --cfg only_node_compatible_functions"
+        cargo_test "--release"
+
+        # After that passes make sure that all intrinsics compile, passing in
+        # the extra feature to compile in non-node-compatible SIMD.
         export RUSTFLAGS="${RUSTFLAGS} -C target-feature=+simd128,+unimplemented-simd128"
         cargo_test "--release --no-run"
         ;;

crates/core_arch/Cargo.toml

@@ -29,7 +29,7 @@ stdsimd-test = { version = "0.*", path = "../stdsimd-test" }
 std_detect = { version = "0.*", path = "../std_detect" }
 
 [target.wasm32-unknown-unknown.dev-dependencies]
-wasm-bindgen-test = "=0.2.19"
+wasm-bindgen-test = "0.2.39"
 
 [package.metadata.docs.rs]
-rustdoc-args = [ "--cfg", "dox" ]
+rustdoc-args = [ "--cfg", "dox" ]