PPC: [es6] Initial steps towards a correct implementation of IsCallable.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 4af5bc4ab8f5afe2a0ca747794ac6356d38867f6..fc23ff79f5b379224cca999f50b2b2edc2c0fec2 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -5009,23 +5009,23 @@ void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
 
   } else if (String::Equals(check, factory->function_string())) {
     __ JumpIfSmi(r3, if_false);
-    STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
-    __ CompareObjectType(r3, r3, r4, JS_FUNCTION_TYPE);
-    __ beq(if_true);
-    __ cmpi(r4, Operand(JS_FUNCTION_PROXY_TYPE));
+    __ LoadP(r3, FieldMemOperand(r3, HeapObject::kMapOffset));
+    __ lbz(r4, FieldMemOperand(r3, Map::kBitFieldOffset));
+    __ andi(r4, r4,
+            Operand((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
+    __ cmpi(r4, Operand(1 << Map::kIsCallable));
     Split(eq, if_true, if_false, fall_through);
   } else if (String::Equals(check, factory->object_string())) {
     __ JumpIfSmi(r3, if_false);
     __ CompareRoot(r3, Heap::kNullValueRootIndex);
     __ beq(if_true);
-    // Check for JS objects => true.
-    __ CompareObjectType(r3, r3, r4, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE);
+    STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
+    __ CompareObjectType(r3, r3, r4, FIRST_SPEC_OBJECT_TYPE);
     __ blt(if_false);
-    __ CompareInstanceType(r3, r4, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
-    __ bgt(if_false);
-    // Check for undetectable objects => false.
+    // Check for callable or undetectable objects => false.
     __ lbz(r4, FieldMemOperand(r3, Map::kBitFieldOffset));
-    __ andi(r0, r4, Operand(1 << Map::kIsUndetectable));
+    __ andi(r0, r4,
+            Operand((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
     Split(eq, if_true, if_false, fall_through, cr0);
 // clang-format off
 #define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type)   \