[WIP] Initial CallFunctionCallback builtin.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index dec879ed2b8ebd2cb1f8a0d2ddffd1fce735f4af..b2c9c1027c82361aca3d51ec7652f7d052035e5f 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -5856,6 +5856,33 @@ void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
   }
 }
 
+void MacroAssembler::AssertApiCallResult(Register object) {
+  if (emit_debug_code()) {
+    Label done_checking;
+    Push(object);
+
+    // Check for Smis.
+    JumpIfSmi(object, &done_checking);
+
+    // Check for valid Oddballs.
+    JumpIfRoot(object, Heap::kTrueValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kFalseValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kNullValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kUndefinedValueRootIndex, &done_checking);
+
+    // Check for other primitives (String, Symbol and HeapNumber).
+    STATIC_ASSERT(LAST_PRIMITIVE_TYPE == ODDBALL_TYPE);
+    GetObjectType(object, object, object);
+    Branch(&done_checking, lo, object, Operand(LAST_PRIMITIVE_TYPE));
+
+    // Check for JSReceivers.
+    Check(hs, kAPICallReturnedInvalidObject, object,
+          Operand(FIRST_JS_RECEIVER_TYPE));
+
+    bind(&done_checking);
+    Pop(object);
+  }
+}
 
 void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) {
   if (emit_debug_code()) {