Implement UnalignedLoad and UnalignedStore in WASM using LoadByte/Shift/Or and StoreByte/Shift/And.

test/cctest/wasm/test-run-wasm-64.cc

 // Copyright 2015 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 <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/base/bits.h"
 #include "src/wasm/wasm-macro-gen.h"
@@ skipping 1229 matching lines @@
   memory[0] = 0xaabbccdd00112233LL;
   CHECK_EQ(0xaabbccdd00112233LL, r.Call());
 
   memory[0] = 0x33aabbccdd001122LL;
   CHECK_EQ(0x33aabbccdd001122LL, r.Call());
 
   memory[0] = 77777777;
   CHECK_EQ(77777777, r.Call());
 }
 
-WASM_EXEC_TEST(MemI64_Sum) {
+WASM_EXEC_TEST(Run_Wasm_LoadMemI64_alignment) {
+  REQUIRE(I64LoadStore);
+  TestingModule module;
+  int64_t* memory = module.AddMemoryElems<int64_t>(8);
+  for (byte alignment = 0; alignment <= 3; alignment++) {
+    module.RandomizeMemory(1111);
+    WasmRunner<int64_t> r(&module);
+
+    BUILD(r,
+          WASM_LOAD_MEM_ALIGNMENT(MachineType::Int64(), WASM_I8(0), alignment));
+
+    memory[0] = 0xaabbccdd00112233LL;
+    CHECK_EQ(0xaabbccdd00112233LL, r.Call());
+
+    memory[0] = 0x33aabbccdd001122LL;
+    CHECK_EQ(0x33aabbccdd001122LL, r.Call());
+
+    memory[0] = 77777777;
+    CHECK_EQ(77777777, r.Call());
+  }
+}
+
+WASM_EXEC_TEST(Run_Wasm_MemI64_Sum) {
   REQUIRE(I64LoadStore);
   REQUIRE(I64Add);
   REQUIRE(I64Sub);
   REQUIRE(I64Phi);
   const int kNumElems = 20;
   TestingModule module;
   uint64_t* memory = module.AddMemoryElems<uint64_t>(kNumElems);
   WasmRunner<uint64_t> r(&module, MachineType::Int32());
   const byte kSum = r.AllocateLocal(kAstI64);
 
@@ skipping 15 matching lines @@
     module.RandomizeMemory(i * 33);
     uint64_t expected = 0;
     for (size_t j = kNumElems - 1; j > 0; j--) {
       expected += memory[j];
     }
     uint64_t result = r.Call(8 * (kNumElems - 1));
     CHECK_EQ(expected, result);
   }
 }
 
-WASM_EXEC_TEST(I64Global) {
+WASM_EXEC_TEST(Run_Wasm_StoreMemI64_alignment) {
+  TestingModule module;
+  int64_t* memory = module.AddMemoryElems<int64_t>(4);
+  const int64_t kWritten = 0x12345678abcd0011ll;
+
+  for (byte i = 0; i <= 3; i++) {
+    WasmRunner<int64_t> r(&module, MachineType::Int64());
+    BUILD(r, WASM_STORE_MEM_ALIGNMENT(MachineType::Int64(), WASM_ZERO, i,
+                                      WASM_GET_LOCAL(0)));
+    module.RandomizeMemory(1111);
+    memory[0] = 0;
+
+    CHECK_EQ(kWritten, r.Call(kWritten));
+    CHECK_EQ(kWritten, memory[0]);
+  }
+}
+
+WASM_EXEC_TEST(Run_Wasm_I64Global) {
   REQUIRE(I64LoadStore);
   REQUIRE(I64SConvertI32);
   REQUIRE(I64And);
   REQUIRE(DepthFirst);
   TestingModule module;
   int64_t* global = module.AddGlobal<int64_t>(MachineType::Int64());
   WasmRunner<int32_t> r(&module, MachineType::Int32());
   // global = global + p0
   BUILD(r, B2(WASM_STORE_GLOBAL(
                   0, WASM_I64_AND(WASM_LOAD_GLOBAL(0),
@@ skipping 38 matching lines @@
   WasmRunner<int64_t> r(MachineType::Int64(), MachineType::Int64());
   BUILD(r, WASM_I64_ROL(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
 
   FOR_UINT64_INPUTS(i) {
     FOR_UINT64_INPUTS(j) {
       int64_t expected = bits::RotateLeft64(*i, *j & 0x3f);
       CHECK_EQ(expected, r.Call(*i, *j));
     }
   }
 }