Revert of Rework CallApi*Stubs.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 5600 matching lines @@
   __ mov(s0, v0);
   __ mov(a0, v0);
   __ PrepareCallCFunction(1, s1);
   __ li(a0, Operand(ExternalReference::isolate_address(isolate)));
   __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate),
                    1);
   __ mov(v0, s0);
   __ jmp(&leave_exit_frame);
 }
 
-void CallApiCallbackStub::Generate(MacroAssembler* masm) {
+static void CallApiFunctionStubHelper(MacroAssembler* masm,
+                                      const ParameterCount& argc,
+                                      bool return_first_arg,
+                                      bool call_data_undefined, bool is_lazy) {
   // ----------- S t a t e -------------
   //  -- a0                  : callee
   //  -- a4                  : call_data
   //  -- a2                  : holder
   //  -- a1                  : api_function_address
+  //  -- a3                  : number of arguments if argc is a register
   //  -- cp                  : context
   //  --
   //  -- sp[0]               : last argument
   //  -- ...
   //  -- sp[(argc - 1)* 8]   : first argument
   //  -- sp[argc * 8]        : receiver
   // -----------------------------------
 
   Register callee = a0;
   Register call_data = a4;
   Register holder = a2;
   Register api_function_address = a1;
   Register context = cp;
 
   typedef FunctionCallbackArguments FCA;
 
   STATIC_ASSERT(FCA::kContextSaveIndex == 6);
   STATIC_ASSERT(FCA::kCalleeIndex == 5);
   STATIC_ASSERT(FCA::kDataIndex == 4);
   STATIC_ASSERT(FCA::kReturnValueOffset == 3);
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
   STATIC_ASSERT(FCA::kArgsLength == 7);
 
+  DCHECK(argc.is_immediate() || a3.is(argc.reg()));
+
   // Save context, callee and call data.
   __ Push(context, callee, call_data);
-  if (!is_lazy()) {
+  if (!is_lazy) {
     // Load context from callee.
     __ ld(context, FieldMemOperand(callee, JSFunction::kContextOffset));
   }
 
   Register scratch = call_data;
-  if (!call_data_undefined()) {
+  if (!call_data_undefined) {
     __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
   }
   // Push return value and default return value.
   __ Push(scratch, scratch);
   __ li(scratch, Operand(ExternalReference::isolate_address(masm->isolate())));
   // Push isolate and holder.
   __ Push(scratch, holder);
 
   // Prepare arguments.
   __ mov(scratch, sp);
 
   // 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);
 
   DCHECK(!api_function_address.is(a0) && !scratch.is(a0));
   // a0 = FunctionCallbackInfo&
   // Arguments is after the return address.
   __ Daddu(a0, sp, Operand(1 * kPointerSize));
   // FunctionCallbackInfo::implicit_args_
   __ sd(scratch, MemOperand(a0, 0 * kPointerSize));
-  // FunctionCallbackInfo::values_
-  __ Daddu(at, scratch,
-           Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize));
-  __ sd(at, MemOperand(a0, 1 * kPointerSize));
-  // FunctionCallbackInfo::length_ = argc
-  // Stored as int field, 32-bit integers within struct on stack always left
-  // justified by n64 ABI.
-  __ li(at, Operand(argc()));
-  __ sw(at, MemOperand(a0, 2 * kPointerSize));
-  // FunctionCallbackInfo::is_construct_call_ = 0
-  __ sw(zero_reg, MemOperand(a0, 2 * kPointerSize + kIntSize));
+  if (argc.is_immediate()) {
+    // FunctionCallbackInfo::values_
+    __ Daddu(at, scratch,
+             Operand((FCA::kArgsLength - 1 + argc.immediate()) * kPointerSize));
+    __ sd(at, MemOperand(a0, 1 * kPointerSize));
+    // FunctionCallbackInfo::length_ = argc
+    // Stored as int field, 32-bit integers within struct on stack always left
+    // justified by n64 ABI.
+    __ li(at, Operand(argc.immediate()));
+    __ sw(at, MemOperand(a0, 2 * kPointerSize));
+    // FunctionCallbackInfo::is_construct_call_ = 0
+    __ sw(zero_reg, MemOperand(a0, 2 * kPointerSize + kIntSize));
+  } else {
+    // FunctionCallbackInfo::values_
+    __ dsll(at, argc.reg(), kPointerSizeLog2);
+    __ Daddu(at, at, scratch);
+    __ Daddu(at, at, Operand((FCA::kArgsLength - 1) * kPointerSize));
+    __ sd(at, MemOperand(a0, 1 * kPointerSize));
+    // FunctionCallbackInfo::length_ = argc
+    // Stored as int field, 32-bit integers within struct on stack always left
+    // justified by n64 ABI.
+    __ sw(argc.reg(), MemOperand(a0, 2 * kPointerSize));
+    // FunctionCallbackInfo::is_construct_call_
+    __ Daddu(argc.reg(), argc.reg(), Operand(FCA::kArgsLength + 1));
+    __ dsll(at, argc.reg(), kPointerSizeLog2);
+    __ sw(at, MemOperand(a0, 2 * kPointerSize + kIntSize));
+  }
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_function_callback(masm->isolate());
 
   AllowExternalCallThatCantCauseGC scope(masm);
   MemOperand context_restore_operand(
       fp, (2 + FCA::kContextSaveIndex) * kPointerSize);
   // Stores return the first js argument.
   int return_value_offset = 0;
-  if (is_store()) {
+  if (return_first_arg) {
     return_value_offset = 2 + FCA::kArgsLength;
   } else {
     return_value_offset = 2 + FCA::kReturnValueOffset;
   }
   MemOperand return_value_operand(fp, return_value_offset * kPointerSize);
   int stack_space = 0;
   int32_t stack_space_offset = 4 * kPointerSize;
-  stack_space = argc() + FCA::kArgsLength + 1;
-  stack_space_offset = kInvalidStackOffset;
+  if (argc.is_immediate()) {
+    stack_space = argc.immediate() + FCA::kArgsLength + 1;
+    stack_space_offset = kInvalidStackOffset;
+  }
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space,
                            stack_space_offset, return_value_operand,
                            &context_restore_operand);
 }
 
 
+void CallApiFunctionStub::Generate(MacroAssembler* masm) {
+  bool call_data_undefined = this->call_data_undefined();
+  CallApiFunctionStubHelper(masm, ParameterCount(a3), false,
+                            call_data_undefined, false);
+}
+
+
+void CallApiAccessorStub::Generate(MacroAssembler* masm) {
+  bool is_store = this->is_store();
+  int argc = this->argc();
+  bool call_data_undefined = this->call_data_undefined();
+  bool is_lazy = this->is_lazy();
+  CallApiFunctionStubHelper(masm, ParameterCount(argc), is_store,
+                            call_data_undefined, is_lazy);
+}
+
+
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- sp[0]                        : name
   //  -- sp[8 .. (8 + kArgsLength*8)] : v8::PropertyCallbackInfo::args_
   //  -- ...
   //  -- a2                           : api_function_address
   // -----------------------------------
 
   Register api_function_address = ApiGetterDescriptor::function_address();
   DCHECK(api_function_address.is(a2));
@@ skipping 26 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64