[wasm-simd] Add tracing for S128 Locals in the interpreter

Change-Id: Ibe60c5025a25b353e6661576872a8fda1aeef5de
Bug: v8:9014
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1536986Reviewed-by: Aseem Garg <aseemgarg@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60478}

src/wasm/wasm-interpreter.cc

@@ -3141,6 +3141,14 @@ class ThreadImpl {
         case kWasmF64:
           PrintF("f64:%lf", val.to<double>());
           break;
+        case kWasmS128: {
+          // This defaults to tracing all S128 values as i32x4 values for now,
+          // when there is more state to know what type of values are on the
+          // stack, the right format should be printed here.
+          int4 s = val.to_s128().to_i32x4();
+          PrintF("i32x4:%d %d %d %d", s.val[0], s.val[1], s.val[2], s.val[3]);
+          break;
+        }
         case kWasmStmt:
           PrintF("void");
           break;