stub fast api calls

src/arm/macro-assembler-arm.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 2280 matching lines @@
   Jump(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, cond);
 }
 
 
 static int AddressOffset(ExternalReference ref0, ExternalReference ref1) {
   return ref0.address() - ref1.address();
 }
 
 
 void MacroAssembler::CallApiFunctionAndReturn(
-    ExternalReference function,
-    Address function_address,
+    Register function_address,
     ExternalReference thunk_ref,
     Register thunk_last_arg,
     int stack_space,
     MemOperand return_value_operand,
     MemOperand* context_restore_operand) {
   ExternalReference next_address =
       ExternalReference::handle_scope_next_address(isolate());
   const int kNextOffset = 0;
   const int kLimitOffset = AddressOffset(
       ExternalReference::handle_scope_limit_address(isolate()),
       next_address);
   const int kLevelOffset = AddressOffset(
       ExternalReference::handle_scope_level_address(isolate()),
       next_address);
 
-  ASSERT(!thunk_last_arg.is(r3));
+  ASSERT(function_address.is(r3));
+  ASSERT(thunk_last_arg.is(r1) || thunk_last_arg.is(r2));
+
+  Label profiler_disabled;
+  Label end_profiler_check;
+  bool* is_profiling_flag =
+      isolate()->cpu_profiler()->is_profiling_address();
+  STATIC_ASSERT(sizeof(*is_profiling_flag) == 1);
+  mov(r9, Operand(reinterpret_cast<int32_t>(is_profiling_flag)));
+  ldrb(r9, MemOperand(r9, 0));
+  cmp(r9, Operand(0));
+  b(eq, &profiler_disabled);
+
+  // Additional parameter is the address of the actual callback.
+  mov(r3, Operand(thunk_ref));
+  jmp(&end_profiler_check);
+
+  bind(&profiler_disabled);
+  Move(r3, function_address);
+  bind(&end_profiler_check);
 
   // Allocate HandleScope in callee-save registers.
   mov(r9, Operand(next_address));
   ldr(r4, MemOperand(r9, kNextOffset));
   ldr(r5, MemOperand(r9, kLimitOffset));
   ldr(r6, MemOperand(r9, kLevelOffset));
   add(r6, r6, Operand(1));
   str(r6, MemOperand(r9, kLevelOffset));
 
   if (FLAG_log_timer_events) {
     FrameScope frame(this, StackFrame::MANUAL);
     PushSafepointRegisters();
     PrepareCallCFunction(1, r0);
     mov(r0, Operand(ExternalReference::isolate_address(isolate())));
     CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1);
     PopSafepointRegisters();
   }
 
-  Label profiler_disabled;
-  Label end_profiler_check;
-  bool* is_profiling_flag =
-      isolate()->cpu_profiler()->is_profiling_address();
-  STATIC_ASSERT(sizeof(*is_profiling_flag) == 1);
-  mov(r3, Operand(reinterpret_cast<int32_t>(is_profiling_flag)));
-  ldrb(r3, MemOperand(r3, 0));
-  cmp(r3, Operand(0));
-  b(eq, &profiler_disabled);
-
-  // Additional parameter is the address of the actual callback.
-  mov(thunk_last_arg, Operand(reinterpret_cast<int32_t>(function_address)));
-  mov(r3, Operand(thunk_ref));
-  jmp(&end_profiler_check);
-
-  bind(&profiler_disabled);
-  mov(r3, Operand(function));
-  bind(&end_profiler_check);
-
   // Native call returns to the DirectCEntry stub which redirects to the
   // return address pushed on stack (could have moved after GC).
   // DirectCEntry stub itself is generated early and never moves.
   DirectCEntryStub stub;
   stub.GenerateCall(this, r3);
 
   if (FLAG_log_timer_events) {
     FrameScope frame(this, StackFrame::MANUAL);
     PushSafepointRegisters();
     PrepareCallCFunction(1, r0);
@@ skipping 1711 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM