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 dea936ee5881481b7323b4f1f87c3fc61149370c..63350cfce94f07ba0fd7bcabd05ae413d7f88409 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -2304,6 +2304,12 @@ void LCodeGen::DoBranch(LBranch* instr) {
         __ beq(instr->TrueLabel(chunk_));
       }
 
+      if (expected.Contains(ToBooleanStub::SIMD_TYPE)) {
+        // 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;
@@ -5956,6 +5962,11 @@ 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);
   }