MIPS: Refactoring PropertyCallbackInfo & FunctionCallbackInfo, step 2.

src/mips/stub-cache-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 814 matching lines @@
 static void FreeSpaceForFastApiCall(MacroAssembler* masm) {
   __ Drop(kFastApiCallArguments);
 }
 
 
 static void GenerateFastApiDirectCall(MacroAssembler* masm,
                                       const CallOptimization& optimization,
                                       int argc,
                                       bool restore_context) {
   // ----------- S t a t e -------------
-  //  -- sp[0]              : context
-  //  -- sp[4]              : holder (set by CheckPrototypes)
-  //  -- sp[8]              : callee JS function
-  //  -- sp[12]             : call data
-  //  -- sp[16]             : isolate
-  //  -- sp[20]             : ReturnValue default value
-  //  -- sp[24]             : ReturnValue
+  //  -- sp[0] - sp[24]     : FunctionCallbackInfo, incl.
+  //                        :  holder (set by CheckPrototypes)
   //  -- sp[28]             : last JS argument
   //  -- ...
   //  -- sp[(argc + 6) * 4] : first JS argument
   //  -- sp[(argc + 7) * 4] : receiver
   // -----------------------------------
+  typedef FunctionCallbackArguments FCA;
+  const int kArgs = kFastApiCallArguments;
   // Save calling context.
-  __ sw(cp, MemOperand(sp));
+  __ sw(cp,
+        MemOperand(sp, (kArgs - 1 + FCA::kContextSaveIndex) * kPointerSize));
   // Get the function and setup the context.
   Handle<JSFunction> function = optimization.constant_function();
   __ LoadHeapObject(t1, function);
   __ lw(cp, FieldMemOperand(t1, JSFunction::kContextOffset));
-  __ sw(t1, MemOperand(sp, 2 * kPointerSize));
+  __ sw(t1, MemOperand(sp, (kArgs - 1 + FCA::kCalleeIndex) * kPointerSize));
 
-  // Pass the additional arguments.
+  // Construct the FunctionCallbackInfo.
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   Handle<Object> call_data(api_call_info->data(), masm->isolate());
   if (masm->isolate()->heap()->InNewSpace(*call_data)) {
     __ li(a0, api_call_info);
     __ lw(t2, FieldMemOperand(a0, CallHandlerInfo::kDataOffset));
   } else {
     __ li(t2, call_data);
   }
   // Store call data.
-  __ sw(t2, MemOperand(sp, 3 * kPointerSize));
+  __ sw(t2, MemOperand(sp, (kArgs - 1 + FCA::kDataIndex) * kPointerSize));
   // Store isolate.
   __ li(t3, Operand(ExternalReference::isolate_address(masm->isolate())));
-  __ sw(t3, MemOperand(sp, 4 * kPointerSize));
+  __ sw(t3, MemOperand(sp, (kArgs - 1 + FCA::kIsolateIndex) * kPointerSize));
   // Store ReturnValue default and ReturnValue.
   __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
-  __ sw(t1, MemOperand(sp, 5 * kPointerSize));
-  __ sw(t1, MemOperand(sp, 6 * kPointerSize));
+  __ sw(t1,
+        MemOperand(sp, (kArgs - 1 + FCA::kReturnValueOffset) * kPointerSize));
+  __ sw(t1,
+        MemOperand(sp,
+            (kArgs - 1 + FCA::kReturnValueDefaultValueIndex) * kPointerSize));
 
   // Prepare arguments.
-  __ Addu(a2, sp, Operand((kFastApiCallArguments - 1) * kPointerSize));
+  __ Addu(a2, sp, Operand((kArgs - 1) * kPointerSize));
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 4;
 
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
   // a0 = v8::Arguments&
   // Arguments is built at sp + 1 (sp is a reserved spot for ra).
   __ Addu(a0, sp, kPointerSize);
 
   // v8::Arguments::implicit_args_
   __ sw(a2, MemOperand(a0, 0 * kPointerSize));
   // v8::Arguments::values_
   __ Addu(t0, a2, Operand(argc * kPointerSize));
   __ sw(t0, MemOperand(a0, 1 * kPointerSize));
   // v8::Arguments::length_ = argc
   __ li(t0, Operand(argc));
   __ sw(t0, MemOperand(a0, 2 * kPointerSize));
   // v8::Arguments::is_construct_call = 0
   __ sw(zero_reg, MemOperand(a0, 3 * kPointerSize));
 
-  const int kStackUnwindSpace = argc + kFastApiCallArguments + 1;
+  const int kStackUnwindSpace = argc + kArgs + 1;
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
   ApiFunction fun(function_address);
   ExternalReference::Type type = ExternalReference::DIRECT_API_CALL;
   ExternalReference ref =
       ExternalReference(&fun,
                         type,
                         masm->isolate());
   Address thunk_address = FUNCTION_ADDR(&InvokeFunctionCallback);
   ExternalReference::Type thunk_type = ExternalReference::PROFILING_API_CALL;
   ApiFunction thunk_fun(thunk_address);
   ExternalReference thunk_ref = ExternalReference(&thunk_fun, thunk_type,
       masm->isolate());
 
   AllowExternalCallThatCantCauseGC scope(masm);
   MemOperand context_restore_operand(
-      fp, 2 * kPointerSize);
+      fp, (kArgs + 1 + FCA::kContextSaveIndex) * kPointerSize);
   MemOperand return_value_operand(
-      fp, (kFastApiCallArguments + 1) * kPointerSize);
+      fp, (kArgs + 1 + FCA::kReturnValueOffset) * kPointerSize);
   __ CallApiFunctionAndReturn(ref,
                               function_address,
                               thunk_ref,
                               a1,
                               kStackUnwindSpace,
                               return_value_operand,
                               restore_context ?
                                   &context_restore_operand : NULL);
 }
 
@@ skipping 2279 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_MissForceGeneric);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS