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

src/wasm/wasm-macro-gen.h

 // 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.
 
 #ifndef V8_WASM_MACRO_GEN_H_
 #define V8_WASM_MACRO_GEN_H_
 
 #include "src/wasm/wasm-opcodes.h"
 
 #include "src/zone-containers.h"
@@ skipping 346 matching lines @@
       ZERO_ALIGNMENT, ZERO_OFFSET
 #define WASM_LOAD_MEM_OFFSET(type, offset, index)                              \
   index, static_cast<byte>(                                                    \
              v8::internal::wasm::WasmOpcodes::LoadStoreOpcodeOf(type, false)), \
       ZERO_ALIGNMENT, static_cast<byte>(offset)
 #define WASM_STORE_MEM_OFFSET(type, offset, index, val)                    \
   index, val,                                                              \
       static_cast<byte>(                                                   \
           v8::internal::wasm::WasmOpcodes::LoadStoreOpcodeOf(type, true)), \
       ZERO_ALIGNMENT, static_cast<byte>(offset)
+#define WASM_LOAD_MEM_ALIGNMENT(type, index, alignment)                        \
+  index, static_cast<byte>(                                                    \
+             v8::internal::wasm::WasmOpcodes::LoadStoreOpcodeOf(type, false)), \
+      alignment, ZERO_OFFSET
+#define WASM_STORE_MEM_ALIGNMENT(type, index, alignment, val)              \
+  index, val,                                                              \
+      static_cast<byte>(                                                   \
+          v8::internal::wasm::WasmOpcodes::LoadStoreOpcodeOf(type, true)), \
+      alignment, ZERO_OFFSET
 
 #define WASM_CALL_FUNCTION0(index) \
   kExprCallFunction, 0, static_cast<byte>(index)
 #define WASM_CALL_FUNCTION1(index, a) \
   a, kExprCallFunction, 1, static_cast<byte>(index)
 #define WASM_CALL_FUNCTION2(index, a, b) \
   a, b, kExprCallFunction, 2, static_cast<byte>(index)
 #define WASM_CALL_FUNCTION3(index, a, b, c) \
   a, b, c, kExprCallFunction, 3, static_cast<byte>(index)
 #define WASM_CALL_FUNCTION4(index, a, b, c, d) \
@@ skipping 206 matching lines @@
 #define SIG_ENTRY_x(r) kWasmFunctionTypeForm, 0, 1, r
 #define SIG_ENTRY_x_x(r, a) kWasmFunctionTypeForm, 1, a, 1, r
 #define SIG_ENTRY_x_xx(r, a, b) kWasmFunctionTypeForm, 2, a, b, 1, r
 #define SIG_ENTRY_x_xxx(r, a, b, c) kWasmFunctionTypeForm, 3, a, b, c, 1, r
 #define SIZEOF_SIG_ENTRY_x 4
 #define SIZEOF_SIG_ENTRY_x_x 5
 #define SIZEOF_SIG_ENTRY_x_xx 6
 #define SIZEOF_SIG_ENTRY_x_xxx 7
 
 #endif  // V8_WASM_MACRO_GEN_H_