X87: split api call stubs into accessor and function call stubs

src/x87/code-stubs-x87.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4323 matching lines @@
   Label fast_elements_case;
   __ cmp(ecx, Immediate(FAST_ELEMENTS));
   __ j(equal, &fast_elements_case);
   GenerateCase(masm, FAST_HOLEY_ELEMENTS);
 
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
-void CallApiFunctionStub::Generate(MacroAssembler* masm) {
+static void CallApiFunctionStubHelper(MacroAssembler* masm,
+                                      const ParameterCount& argc,
+                                      bool return_first_arg,
+                                      bool call_data_undefined) {
   // ----------- S t a t e -------------
   //  -- eax                 : callee
   //  -- ebx                 : call_data
   //  -- ecx                 : holder
   //  -- edx                 : api_function_address
   //  -- esi                 : context
+  //  -- edi                 : number of arguments if argc is a register
   //  --
   //  -- esp[0]              : return address
   //  -- esp[4]              : last argument
   //  -- ...
   //  -- esp[argc * 4]       : first argument
   //  -- esp[(argc + 1) * 4] : receiver
   // -----------------------------------
 
   Register callee = eax;
   Register call_data = ebx;
   Register holder = ecx;
   Register api_function_address = edx;
-  Register return_address = edi;
   Register context = esi;
 
-  int argc = this->argc();
-  bool is_store = this->is_store();
-  bool call_data_undefined = this->call_data_undefined();
-
   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);
 
-  __ pop(return_address);
+  DCHECK(argc.is_immediate() || edi.is(argc.reg()));
 
-  // context save
-  __ push(context);
-  // load context from callee
-  __ mov(context, FieldOperand(callee, JSFunction::kContextOffset));
+  // pop return address and save context
+  __ xchg(context, Operand(esp, 0));
 
   // callee
   __ push(callee);
 
   // call data
   __ push(call_data);
 
   Register scratch = call_data;
   if (!call_data_undefined) {
     // return value
-    __ push(Immediate(isolate()->factory()->undefined_value()));
+    __ push(Immediate(masm->isolate()->factory()->undefined_value()));
     // return value default
-    __ push(Immediate(isolate()->factory()->undefined_value()));
+    __ push(Immediate(masm->isolate()->factory()->undefined_value()));
   } else {
     // return value
     __ push(scratch);
     // return value default
     __ push(scratch);
   }
   // isolate
-  __ push(Immediate(reinterpret_cast<int>(isolate())));
+  __ push(Immediate(reinterpret_cast<int>(masm->isolate())));
   // holder
   __ push(holder);
 
   __ mov(scratch, esp);
 
-  // return address
-  __ push(return_address);
+  // push return address
+  __ push(context);
+
+  // load context from callee
+  __ mov(context, FieldOperand(callee, JSFunction::kContextOffset));
 
   // API function gets reference to the v8::Arguments. If CPU profiler
   // is enabled wrapper function will be called and we need to pass
   // address of the callback as additional parameter, always allocate
   // space for it.
   const int kApiArgc = 1 + 1;
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 4;
 
   __ PrepareCallApiFunction(kApiArgc + kApiStackSpace);
 
   // FunctionCallbackInfo::implicit_args_.
   __ mov(ApiParameterOperand(2), scratch);
-  __ add(scratch, Immediate((argc + FCA::kArgsLength - 1) * kPointerSize));
-  // FunctionCallbackInfo::values_.
-  __ mov(ApiParameterOperand(3), scratch);
-  // FunctionCallbackInfo::length_.
-  __ Move(ApiParameterOperand(4), Immediate(argc));
-  // FunctionCallbackInfo::is_construct_call_.
-  __ Move(ApiParameterOperand(5), Immediate(0));
+  if (argc.is_immediate()) {
+    __ add(scratch,
+           Immediate((argc.immediate() + FCA::kArgsLength - 1) * kPointerSize));
+    // FunctionCallbackInfo::values_.
+    __ mov(ApiParameterOperand(3), scratch);
+    // FunctionCallbackInfo::length_.
+    __ Move(ApiParameterOperand(4), Immediate(argc.immediate()));
+    // FunctionCallbackInfo::is_construct_call_.
+    __ Move(ApiParameterOperand(5), Immediate(0));
+  } else {
+    __ lea(scratch, Operand(scratch, argc.reg(), times_pointer_size,
+                            (FCA::kArgsLength - 1) * kPointerSize));
+    // FunctionCallbackInfo::values_.
+    __ mov(ApiParameterOperand(3), scratch);
+    // FunctionCallbackInfo::length_.
+    __ mov(ApiParameterOperand(4), argc.reg());
+    // FunctionCallbackInfo::is_construct_call_.
+    __ lea(argc.reg(), Operand(argc.reg(), times_pointer_size,
+                               (FCA::kArgsLength + 1) * kPointerSize));
+    __ mov(ApiParameterOperand(5), argc.reg());
+  }
 
   // v8::InvocationCallback's argument.
   __ lea(scratch, ApiParameterOperand(2));
   __ mov(ApiParameterOperand(0), scratch);
 
   ExternalReference thunk_ref =
-      ExternalReference::invoke_function_callback(isolate());
+      ExternalReference::invoke_function_callback(masm->isolate());
 
   Operand context_restore_operand(ebp,
                                   (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;
   }
   Operand return_value_operand(ebp, return_value_offset * kPointerSize);
-  __ CallApiFunctionAndReturn(api_function_address,
-                              thunk_ref,
-                              ApiParameterOperand(1),
-                              argc + FCA::kArgsLength + 1,
-                              return_value_operand,
-                              &context_restore_operand);
+  int stack_space = 0;
+  Operand is_construct_call_operand = ApiParameterOperand(5);
+  Operand* stack_space_operand = &is_construct_call_operand;
+  if (argc.is_immediate()) {
+    stack_space = argc.immediate() + FCA::kArgsLength + 1;
+    stack_space_operand = nullptr;
+  }
+  __ CallApiFunctionAndReturn(
+      api_function_address, thunk_ref, ApiParameterOperand(1), stack_space,
+      stack_space_operand, return_value_operand, &context_restore_operand);
 }
 
 
+void CallApiFunctionStub::Generate(MacroAssembler* masm) {
+  // TODO(dcarney): make eax contain the function address.
+  bool call_data_undefined = this->call_data_undefined();
+  CallApiFunctionStubHelper(masm, ParameterCount(edi), false,
+                            call_data_undefined);
+}
+
+
+void CallApiAccessorStub::Generate(MacroAssembler* masm) {
+  bool is_store = this->is_store();
+  int argc = is_store ? 1 : 0;
+  bool call_data_undefined = this->call_data_undefined();
+  CallApiFunctionStubHelper(masm, ParameterCount(argc), is_store,
+                            call_data_undefined);
+}
+
+
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- esp[0]                  : return address
   //  -- esp[4]                  : name
   //  -- esp[8 - kArgsLength*4]  : PropertyCallbackArguments object
   //  -- ...
   //  -- edx                    : api_function_address
   // -----------------------------------
   DCHECK(edx.is(ApiGetterDescriptor::function_address()));
 
@@ skipping 11 matching lines @@
   __ lea(scratch, Operand(esp, 1 * kPointerSize));
 
   __ PrepareCallApiFunction(kApiArgc);
   __ mov(ApiParameterOperand(0), scratch);  // name.
   __ add(scratch, Immediate(kPointerSize));
   __ mov(ApiParameterOperand(1), scratch);  // arguments pointer.
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_accessor_getter_callback(isolate());
 
-  __ CallApiFunctionAndReturn(api_function_address,
-                              thunk_ref,
-                              ApiParameterOperand(2),
-                              kStackSpace,
-                              Operand(ebp, 7 * kPointerSize),
-                              NULL);
+  __ CallApiFunctionAndReturn(api_function_address, thunk_ref,
+                              ApiParameterOperand(2), kStackSpace, nullptr,
+                              Operand(ebp, 7 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87