Expose SIMD.Float32x4 type to Javascript.

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 85438f47b3f799de884c3337568abdeb7d57135e..1c88aa6209f2f982ba5a52f7352d8225ab3e527d 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -2305,6 +2305,12 @@ void LCodeGen::DoBranch(LBranch* instr) {
         __ beq(instr->TrueLabel(chunk_));
       }
 
+      if (expected.Contains(ToBooleanStub::SIMD_VALUE)) {
+        // SIMD value -> true.
+        __ CompareInstanceType(map, ip, FLOAT32X4_TYPE);
+        __ beq(instr->TrueLabel(chunk_));
+      }
+
       if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) {
         // heap number -> false iff +0, -0, or NaN.
         Label not_heap_number;
@@ -5967,6 +5973,11 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label, Label* false_label,
     __ cmpi(r0, Operand::Zero());
     final_branch_condition = eq;
 
+  } else if (String::Equals(type_name, factory->float32x4_string())) {
+    __ JumpIfSmi(input, false_label);
+    __ CompareObjectType(input, scratch, no_reg, FLOAT32X4_TYPE);
+    final_branch_condition = eq;
+
   } else {
     __ b(false_label);
   }