PPC [liftoff]: Implement simd load and store

Change-Id: Ia45248a3d8566dbb4f2702a8b1ea6959157dc76b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3776949
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#81857}

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -433,7 +433,11 @@ void LiftoffAssembler::Load(LiftoffRegister dst, Register src_addr,
       }
       break;
     case LoadType::kS128Load:
-      bailout(kUnsupportedArchitecture, "SIMD");
+      if (is_load_mem) {
+        LoadSimd128LE(dst.fp().toSimd(), src_op, r0);
+      } else {
+        LoadSimd128(dst.fp().toSimd(), src_op, r0);
+      }
       break;
     default:
       UNREACHABLE();
@@ -492,7 +496,11 @@ void LiftoffAssembler::Store(Register dst_addr, Register offset_reg,
       }
       break;
     case StoreType::kS128Store: {
-      bailout(kUnsupportedArchitecture, "SIMD");
+      if (is_store_mem) {
+        StoreSimd128LE(src.fp().toSimd(), dst_op, r0, kScratchSimd128Reg);
+      } else {
+        StoreSimd128(src.fp().toSimd(), dst_op, r0);
+      }
       break;
     }
     default: