[V8] Implement SIMD Boolean vector types to allow mask registers.

src/wasm/function-body-decoder.cc

Index: src/wasm/function-body-decoder.cc
diff --git a/src/wasm/function-body-decoder.cc b/src/wasm/function-body-decoder.cc
index 3311caa3e233574499818fea8c6609815af3b937..dc2f83b459d2cfc0966312661d5210a89a6f02cb 100644
--- a/src/wasm/function-body-decoder.cc
+++ b/src/wasm/function-body-decoder.cc
@@ -215,6 +215,15 @@ class WasmDecoder : public Decoder {
         case kLocalS128:
           type = kWasmS128;
           break;
+        case kLocalS1x4:
+          type = kWasmS1x4;
+          break;
+        case kLocalS1x8:
+          type = kWasmS1x8;
+          break;
+        case kLocalS1x16:
+          type = kWasmS1x16;
+          break;
         default:
           decoder->error(decoder->pc() - 1, "invalid local type");
           return false;