Test stdarch (only x86 SSE and SSE2 for now)

.github/workflows/ci.yml

@@ -47,6 +47,15 @@ jobs:
       - name: Test
         run: bash ./ci-test.sh simd
 
+  test-stdarch:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup environment
+        run: bash ./ci-setup.sh
+      - name: Test
+        run: bash ./ci-test.sh stdarch
+
   # Send a Zulip notification when a cron job fails
   cron-fail-notify:
     name: cronjob failure notification

Cargo.toml

@@ -8,4 +8,5 @@ members = [
 exclude = [
   # stdarch has its own Cargo workspace
   "library/stdarch",
+  "rust-src-patched/library/stdarch",
 ]

ci-test.sh

@@ -104,6 +104,15 @@ simd)
         2>&1 | ts -i '%.s  '
     echo "::endgroup::"
     ;;
+stdarch)
+    for TARGET in x86_64-unknown-linux-gnu i686-unknown-linux-gnu; do
+        echo "::group::Testing stdarch ($TARGET)"
+        MIRIFLAGS="$DEFAULTFLAGS" \
+            ./run-stdarch-test.sh $TARGET \
+            2>&1 | ts -i '%.s  '
+        echo "::endgroup::"
+    done
+    ;;
 *)
     echo "Unknown command"
     exit 1

run-stdarch-test.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -euo pipefail
+
+## Run stdarch test suite with Miri.
+## Assumes Miri to be installed.
+## Usage:
+##   ./run-test.sh TARGET
+## Environment variables:
+##   MIRI_LIB_SRC: The path to the Rust library directory (`library`).
+##   RUSTFLAGS: rustc flags (optional)
+##   MIRIFLAGS: Miri flags (optional)
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 TARGET"
+    exit 1
+fi
+
+export TARGET="$1"
+
+case "$TARGET" in
+i586-*|i686-*|x86_64-*)
+    RUSTFLAGS="-C target-feature=+sse2"
+    TEST_ARGS=(
+        core_arch::x86::{sse,sse2}::
+        core_arch::x86_64::{sse,sse2}::
+        # FIXME add `#[cfg_attr(miri, ignore)]` to those tests in stdarch
+        --skip test_mm_comieq_ss_vs_ucomieq_ss
+        --skip test_mm_getcsr_setcsr_1
+        --skip test_mm_getcsr_setcsr_2
+        --skip test_mm_getcsr_setcsr_underflow
+        --skip test_mm_sfence
+        --skip test_mm_stream_ps
+        --skip test_mm_clflush
+        --skip test_mm_lfence
+        --skip test_mm_madd_epi16 # FIXME not yet implemented
+        --skip test_mm_maskmoveu_si128
+        --skip test_mm_mfence
+        --skip test_mm_stream_pd
+        --skip test_mm_stream_si128
+        --skip test_mm_stream_si32
+        --skip test_mm_stream_si64
+        # FIXME fix those in stdarch
+        --skip test_mm_rcp_ss # __m128(0.24997461, 13.0, 16.0, 100.0) != __m128(0.24993896, 13.0, 16.0, 100.0)
+        --skip test_mm_store1_ps # attempt to subtract with overflow
+        --skip test_mm_store_ps # attempt to subtract with overflow
+        --skip test_mm_storer_ps # attempt to subtract with overflow
+    )
+    ;;
+*)
+    echo "Unknown target $TARGET"
+    exit 1
+esac
+
+export RUSTFLAGS="${RUSTFLAGS:-} -Ainternal_features"
+
+# Make sure all tested target features are enabled
+export STDARCH_TEST_EVERYTHING=1
+# Needed to pass the STDARCH_TEST_EVERYTHING environment variable
+export MIRIFLAGS="${MIRIFLAGS:-} -Zmiri-disable-isolation"
+
+cd $MIRI_LIB_SRC/stdarch
+cargo miri test --manifest-path=crates/core_arch/Cargo.toml -- "${TEST_ARGS[@]}"

rust-version

@@ -1 +1 @@
-nightly-2023-08-16
+nightly-2023-09-28