[wasm] Add native x64 implementations for I32x4Splat, I32x4ExtractLane

test/cctest/wasm/test-run-wasm-simd.cc

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/wasm/wasm-macro-gen.h"
+
+#include "test/cctest/cctest.h"
+#include "test/cctest/compiler/value-helper.h"
+#include "test/cctest/wasm/wasm-run-utils.h"
+
+using namespace v8::base;
+using namespace v8::internal;
+using namespace v8::internal::compiler;
+using namespace v8::internal::wasm;
+
+WASM_EXEC_TEST(Splat) {
+  FLAG_wasm_simd_prototype = true;
+
+  // Store SIMD value in a local variable, use extract lane to check lane values
+  // This test is not a test for ExtractLane as Splat does not create
+  // interesting SIMD values.
+  //
+  // SetLocal(1, I32x4Splat(Local(0)));
+  // For each lane index
+  // if(Local(0) != I32x4ExtractLane(Local(1), index)
+  //   return 0
+  //
+  // return 1
+  WasmRunner<int32_t> r(kExecuteCompiled, MachineType::Int32());
+  r.AllocateLocal(kAstS128);
+  BUILD(r,
+        WASM_BLOCK(WASM_SET_LOCAL(1, WASM_SIMD_I32x4_SPLAT(WASM_GET_LOCAL(0))),
+                   WASM_IF(WASM_I32_NE(WASM_GET_LOCAL(0),
+                                       WASM_SIMD_I32x4_EXTRACT_LANE(
+                                           WASM_GET_LOCAL(1), WASM_I8(0))),
+                           WASM_RETURN1(WASM_ZERO)),
+                   WASM_IF(WASM_I32_NE(WASM_GET_LOCAL(0),
+                                       WASM_SIMD_I32x4_EXTRACT_LANE(
+                                           WASM_GET_LOCAL(1), WASM_I8(1))),
+                           WASM_RETURN1(WASM_ZERO)),
+                   WASM_IF(WASM_I32_NE(WASM_GET_LOCAL(0),
+                                       WASM_SIMD_I32x4_EXTRACT_LANE(
+                                           WASM_GET_LOCAL(1), WASM_I8(2))),
+                           WASM_RETURN1(WASM_ZERO)),
+                   WASM_IF(WASM_I32_NE(WASM_GET_LOCAL(0),
+                                       WASM_SIMD_I32x4_EXTRACT_LANE(
+                                           WASM_GET_LOCAL(1), WASM_I8(3))),
+                           WASM_RETURN1(WASM_ZERO)),
+                   WASM_RETURN1(WASM_ONE)));
+
+  FOR_INT32_INPUTS(i) { CHECK_EQ(1, r.Call(*i)); }
+}