Initial (stub) port of jump targets to the ARM platform....

src/macro-assembler-ia32.cc

 // Copyright 2006-2008 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 18 matching lines @@
 
 #include "bootstrapper.h"
 #include "codegen-inl.h"
 #include "debug.h"
 #include "runtime.h"
 #include "serialize.h"
 
 namespace v8 { namespace internal {
 
 // -------------------------------------------------------------------------
-// VirtualFrame implementation.
-
-#define __ masm_->
-
-VirtualFrame::VirtualFrame(CodeGenerator* cgen) {
-  ASSERT(cgen->scope() != NULL);
-
-  masm_ = cgen->masm();
-  frame_local_count_ = cgen->scope()->num_stack_slots();
-  parameter_count_ = cgen->scope()->num_parameters();
-  height_ = 0;
-}
-
-
-VirtualFrame::VirtualFrame(VirtualFrame* original) {
-  ASSERT(original != NULL);
-
-  masm_ = original->masm_;
-  frame_local_count_ = original->frame_local_count_;
-  parameter_count_ = original->parameter_count_;
-  height_ = original->height_;
-}
-
-
-void VirtualFrame::Forget(int count) {
-  ASSERT(count >= 0);
-  ASSERT(height_ >= count);
-  height_ -= count;
-}
-
-
-void VirtualFrame::MergeTo(VirtualFrame* expected) {
-  ASSERT(masm_ == expected->masm_);
-  ASSERT(frame_local_count_ == expected->frame_local_count_);
-  ASSERT(parameter_count_ == expected->parameter_count_);
-  ASSERT(height_ == expected->height_);
-}
-
-
-void VirtualFrame::Enter() {
-  Comment cmnt(masm_, "[ Enter JS frame");
-  __ push(ebp);
-  __ mov(ebp, Operand(esp));
-
-  // Store the context and the function in the frame.
-  __ push(esi);
-  __ push(edi);
-
-  // Clear the function slot when generating debug code.
-  if (FLAG_debug_code) {
-    __ Set(edi, Immediate(reinterpret_cast<int>(kZapValue)));
-  }
-}
-
-
-void VirtualFrame::Exit() {
-  Comment cmnt(masm_, "[ Exit JS frame");
-  // Record the location of the JS exit code for patching when setting
-  // break point.
-  __ RecordJSReturn();
-
-  // Avoid using the leave instruction here, because it is too
-  // short. We need the return sequence to be a least the size of a
-  // call instruction to support patching the exit code in the
-  // debugger. See VisitReturnStatement for the full return sequence.
-  __ mov(esp, Operand(ebp));
-  __ pop(ebp);
-}
-
-
-void VirtualFrame::AllocateLocals() {
-  if (frame_local_count_ > 0) {
-    Comment cmnt(masm_, "[ Allocate space for locals");
-    __ Set(eax, Immediate(Factory::undefined_value()));
-    for (int i = 0; i < frame_local_count_; i++) {
-      __ push(eax);
-    }
-  }
-}
-
-
-// -------------------------------------------------------------------------
-// JumpTarget implementation.
-
-JumpTarget::JumpTarget(CodeGenerator* cgen) {
-  ASSERT(cgen != NULL);
-  expected_frame_ = NULL;
-  code_generator_ = cgen;
-  masm_ = cgen->masm();
-}
-
-
-JumpTarget::JumpTarget()
-    : expected_frame_(NULL),
-      code_generator_(NULL),
-      masm_(NULL) {
-}
-
-
-void JumpTarget::set_code_generator(CodeGenerator* cgen) {
-  ASSERT(cgen != NULL);
-  ASSERT(code_generator_ == NULL);
-  code_generator_ = cgen;
-  masm_ = cgen->masm();
-}
-
-
-bool JumpTarget::IsActualFunctionReturn() {
-  return (this == &code_generator_->function_return_ &&
-          !code_generator_->function_return_is_shadowed_);
-}
-
-
-void JumpTarget::Jump() {
-  // Precondition: there is a current frame.  There may or may not be an
-  // expected frame at the label.
-  ASSERT(code_generator_ != NULL);
-  ASSERT(masm_ != NULL);
-
-  VirtualFrame* current_frame = code_generator_->frame();
-  ASSERT(current_frame != NULL);
-
-  if (expected_frame_ == NULL) {
-    expected_frame_ = current_frame;
-    code_generator_->set_frame(NULL);
-    // The frame at the actual function return will always have height
-    // zero.
-    if (IsActualFunctionReturn()) expected_frame_->height_ = 0;
-  } else {
-    // No code needs to be emitted to merge to the expected frame at the
-    // actual function return.
-    if (!IsActualFunctionReturn()) current_frame->MergeTo(expected_frame_);
-    code_generator_->delete_frame();
-  }
-
-  __ jmp(&label_);
-  // Postcondition: there is no current frame but there is an expected frame
-  // at the label.
-}
-
-
-void JumpTarget::Branch(Condition cc, Hint hint) {
-  // Precondition: there is a current frame.  There may or may not be an
-  // expected frame at the label.
-  ASSERT(code_generator_ != NULL);
-  ASSERT(masm_ != NULL);
-
-  VirtualFrame* current_frame = code_generator_->frame();
-  ASSERT(current_frame != NULL);
-
-  if (expected_frame_ == NULL) {
-    expected_frame_ = new VirtualFrame(current_frame);
-    // The frame at the actual function return will always have height
-    // zero.
-    if (IsActualFunctionReturn()) expected_frame_->height_ = 0;
-  } else {
-    // No code needs to be emitted to merge to the expected frame at the
-    // actual function return.
-    if (!IsActualFunctionReturn()) current_frame->MergeTo(expected_frame_);
-  }
-
-  __ j(cc, &label_, hint);
-  // Postcondition: there is both a current frame and an expected frame at
-  // the label and they match.
-}
-
-
-void JumpTarget::Call() {
-  // Precondition: there is a current frame, and there is no expected frame
-  // at the label.
-  ASSERT(code_generator_ != NULL);
-  ASSERT(masm_ != NULL);
-  ASSERT(!IsActualFunctionReturn());
-
-  VirtualFrame* current_frame = code_generator_->frame();
-  ASSERT(current_frame != NULL);
-  ASSERT(expected_frame_ == NULL);
-
-  expected_frame_ = new VirtualFrame(current_frame);
-  // Adjust the expected frame's height to account for the return address
-  // pushed by the call instruction.
-  expected_frame_->height_++;
-
-  __ call(&label_);
-
-  // Postcondition: there is both a current frame and an expected frame at
-  // the label.  The current frame is one shorter than the one at the label
-  // (which contains the 'return address', ie, the eip register and possibly
-  // cs register).
-}
-
-
-void JumpTarget::Bind() {
-  ASSERT(code_generator_ != NULL);
-  ASSERT(masm_ != NULL);
-
-  // Precondition: there is either a current frame or an expected frame at
-  // the label (and possibly both).  The label is unbound.
-  VirtualFrame* current_frame = code_generator_->frame();
-  ASSERT(current_frame != NULL || expected_frame_ != NULL);
-  ASSERT(!label_.is_bound());
-
-  if (expected_frame_ == NULL) {
-    expected_frame_ = new VirtualFrame(current_frame);
-    // The frame at the actual function return will always have height
-    // zero.
-    if (IsActualFunctionReturn()) expected_frame_->height_ = 0;
-  } else if (current_frame == NULL) {
-    code_generator_->set_frame(new VirtualFrame(expected_frame_));
-  } else {
-    // No code needs to be emitted to merge to the expected frame at the
-    // actual function return.
-    if (!IsActualFunctionReturn()) current_frame->MergeTo(expected_frame_);
-  }
-
-  __ bind(&label_);
-  // Postcondition: there is both a current frame and an expected frame at
-  // the label and they match.  The label is bound.
-}
-
-
-// -------------------------------------------------------------------------
-// ShadowTarget implementation.
-
-ShadowTarget::ShadowTarget(JumpTarget* original) {
-  ASSERT(original != NULL);
-  original_target_ = original;
-  original_pos_ = original->label()->pos_;
-  original_expected_frame_ = original->expected_frame();
-
-  // We do not call Unuse() on the orginal jump target, because we do not
-  // want to delete the expected frame.
-  original->label()->pos_ = 0;
-  original->set_expected_frame(NULL);
-#ifdef DEBUG
-  is_shadowing_ = true;
-#endif
-}
-
-
-void ShadowTarget::StopShadowing() {
-  ASSERT(is_shadowing_);
-  ASSERT(is_unused());
-
-  set_code_generator(original_target_->code_generator());
-  label_.pos_ = original_target_->label()->pos_;
-  expected_frame_ = original_target_->expected_frame();
-
-  original_target_->label()->pos_ = original_pos_;
-  original_target_->set_expected_frame(original_expected_frame_);
-
-#ifdef DEBUG
-  is_shadowing_ = false;
-#endif
-}
-
-#undef __
-
-
-// -------------------------------------------------------------------------
 // MacroAssembler implementation.
 
 MacroAssembler::MacroAssembler(void* buffer, int size)
     : Assembler(buffer, size),
       unresolved_(0),
       generating_stub_(false),
       allow_stub_calls_(true) {
 }
 
 
@@ skipping 958 matching lines @@
   // Indicate that code has changed.
   CPU::FlushICache(address_, size_);
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 
 } }  // namespace v8::internal