Introduce StackArgumentsAccessor class for X64

src/x64/builtins-x64.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 690 matching lines @@
     FrameScope scope(masm, StackFrame::INTERNAL);
 
     // Pass the deoptimization type to the runtime system.
     __ Push(Smi::FromInt(static_cast<int>(type)));
 
     __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
     // Tear down internal frame.
   }
 
   // Get the full codegen state from the stack and untag it.
-  __ SmiToInteger32(r10, Operand(rsp, 1 * kPointerSize));
+  __ SmiToInteger32(r10, Operand(rsp, kPCOnStackSize));
 
   // Switch on the state.
   Label not_no_registers, not_tos_rax;
   __ cmpq(r10, Immediate(FullCodeGenerator::NO_REGISTERS));
   __ j(not_equal, &not_no_registers, Label::kNear);
   __ ret(1 * kPointerSize);  // Remove state.
 
   __ bind(&not_no_registers);
-  __ movq(rax, Operand(rsp, 2 * kPointerSize));
+  __ movq(rax, Operand(rsp, kPCOnStackSize + kPointerSize));
   __ cmpq(r10, Immediate(FullCodeGenerator::TOS_REG));
   __ j(not_equal, &not_tos_rax, Label::kNear);
   __ ret(2 * kPointerSize);  // Remove state, rax.
 
   __ bind(&not_tos_rax);
   __ Abort("no cases left");
 }
 
 
 void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
@@ skipping 44 matching lines @@
     __ pop(rbx);
     __ Push(masm->isolate()->factory()->undefined_value());
     __ push(rbx);
     __ incq(rax);
     __ bind(&done);
   }
 
   // 2. Get the function to call (passed as receiver) from the stack, check
   //    if it is a function.
   Label slow, non_function;
-  // The function to call is at position n+1 on the stack.
-  __ movq(rdi, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize));
+  StackArgumentsAccessor args(rsp, rax);
+  __ movq(rdi, args.GetReceiverOperand());
   __ JumpIfSmi(rdi, &non_function);
   __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx);
   __ j(not_equal, &slow);
 
   // 3a. Patch the first argument if necessary when calling a function.
   Label shift_arguments;
   __ Set(rdx, 0);  // indicate regular JS_FUNCTION
   { Label convert_to_object, use_global_receiver, patch_receiver;
     // Change context eagerly in case we need the global receiver.
     __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset));
 
     // Do not transform the receiver for strict mode functions.
     __ movq(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
     __ testb(FieldOperand(rbx, SharedFunctionInfo::kStrictModeByteOffset),
              Immediate(1 << SharedFunctionInfo::kStrictModeBitWithinByte));
     __ j(not_equal, &shift_arguments);
 
     // Do not transform the receiver for natives.
     // SharedFunctionInfo is already loaded into rbx.
     __ testb(FieldOperand(rbx, SharedFunctionInfo::kNativeByteOffset),
              Immediate(1 << SharedFunctionInfo::kNativeBitWithinByte));
     __ j(not_zero, &shift_arguments);
 
     // Compute the receiver in non-strict mode.
-    __ movq(rbx, Operand(rsp, rax, times_pointer_size, 0));
+    __ movq(rbx, args.GetArgumentOperand(1));
     __ JumpIfSmi(rbx, &convert_to_object, Label::kNear);
 
     __ CompareRoot(rbx, Heap::kNullValueRootIndex);
     __ j(equal, &use_global_receiver);
     __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
     __ j(equal, &use_global_receiver);
 
     STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
     __ CmpObjectType(rbx, FIRST_SPEC_OBJECT_TYPE, rcx);
     __ j(above_equal, &shift_arguments);
 
     __ bind(&convert_to_object);
     {
       // Enter an internal frame in order to preserve argument count.
       FrameScope scope(masm, StackFrame::INTERNAL);
       __ Integer32ToSmi(rax, rax);
       __ push(rax);
 
       __ push(rbx);
       __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
       __ movq(rbx, rax);
       __ Set(rdx, 0);  // indicate regular JS_FUNCTION
 
       __ pop(rax);
       __ SmiToInteger32(rax, rax);
     }
 
     // Restore the function to rdi.
-    __ movq(rdi, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize));
+    __ movq(rdi, args.GetReceiverOperand());
     __ jmp(&patch_receiver, Label::kNear);
 
     // Use the global receiver object from the called function as the
     // receiver.
     __ bind(&use_global_receiver);
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize;
     __ movq(rbx, FieldOperand(rsi, kGlobalIndex));
     __ movq(rbx, FieldOperand(rbx, GlobalObject::kNativeContextOffset));
     __ movq(rbx, FieldOperand(rbx, kGlobalIndex));
     __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
-    __ movq(Operand(rsp, rax, times_pointer_size, 0), rbx);
+    __ movq(args.GetArgumentOperand(1), rbx);
 
     __ jmp(&shift_arguments);
   }
 
   // 3b. Check for function proxy.
   __ bind(&slow);
   __ Set(rdx, 1);  // indicate function proxy
   __ CmpInstanceType(rcx, JS_FUNCTION_PROXY_TYPE);
   __ j(equal, &shift_arguments);
   __ bind(&non_function);
   __ Set(rdx, 2);  // indicate non-function
 
   // 3c. Patch the first argument when calling a non-function.  The
   //     CALL_NON_FUNCTION builtin expects the non-function callee as
   //     receiver, so overwrite the first argument which will ultimately
   //     become the receiver.
-  __ movq(Operand(rsp, rax, times_pointer_size, 0), rdi);
+  __ movq(args.GetArgumentOperand(1), rdi);
 
   // 4. Shift arguments and return address one slot down on the stack
   //    (overwriting the original receiver).  Adjust argument count to make
   //    the original first argument the new receiver.
   __ bind(&shift_arguments);
   { Label loop;
     __ movq(rcx, rax);
     __ bind(&loop);
     __ movq(rbx, Operand(rsp, rcx, times_pointer_size, 0));
     __ movq(Operand(rsp, rcx, times_pointer_size, 1 * kPointerSize), rbx);
@@ skipping 289 matching lines @@
   __ IncrementCounter(counters->string_ctor_calls(), 1);
 
   if (FLAG_debug_code) {
     __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, rcx);
     __ cmpq(rdi, rcx);
     __ Assert(equal, "Unexpected String function");
   }
 
   // Load the first argument into rax and get rid of the rest
   // (including the receiver).
+  StackArgumentsAccessor args(rsp, rax);
   Label no_arguments;
   __ testq(rax, rax);
   __ j(zero, &no_arguments);
-  __ movq(rbx, Operand(rsp, rax, times_pointer_size, 0));
+  __ movq(rbx, args.GetArgumentOperand(1));
   __ pop(rcx);
   __ lea(rsp, Operand(rsp, rax, times_pointer_size, kPointerSize));
   __ push(rcx);
   __ movq(rax, rbx);
 
   // Lookup the argument in the number to string cache.
   Label not_cached, argument_is_string;
   NumberToStringStub::GenerateLookupNumberStringCache(
       masm,
       rax,  // Input.
@@ skipping 239 matching lines @@
   Deoptimizer::EntryGenerator generator(masm, Deoptimizer::OSR);
   generator.Generate();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64