[wasm] Fix misaligned accesses and endianness issues in decoders.

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

Index: test/cctest/wasm/test-run-wasm.cc
diff --git a/test/cctest/wasm/test-run-wasm.cc b/test/cctest/wasm/test-run-wasm.cc
index 39812637f4af9a5e3fe2a75fffb0b95722ae4898..e1307d8eae63c31b448bf77474a7b54d5b3ac863 100644
--- a/test/cctest/wasm/test-run-wasm.cc
+++ b/test/cctest/wasm/test-run-wasm.cc
@@ -2378,9 +2378,6 @@ TEST(Run_WasmCallEmpty) {
 }
 
 
-// TODO(tizer): Fix on arm and reenable.
-#if !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64
-
 TEST(Run_WasmCallF32StackParameter) {
   // Build the target function.
   LocalType param_types[20];
@@ -2432,8 +2429,6 @@ TEST(Run_WasmCallF64StackParameter) {
   CHECK_EQ(256.5, result);
 }
 
-#endif
-
 
 TEST(Run_WasmCallVoid) {
   const byte kMemOffset = 8;