1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "src/compiler/frame.h"
6
7#include "src/compiler/linkage.h"
8#include "src/compiler/register-allocator.h"
9#include "src/macro-assembler.h"
10
11namespace v8 {
12namespace internal {
13namespace compiler {
14
15Frame::Frame(int fixed_frame_size_in_slots)
16    : frame_slot_count_(fixed_frame_size_in_slots),
17      spill_slot_count_(0),
18      allocated_registers_(nullptr),
19      allocated_double_registers_(nullptr) {}
20
21int Frame::AlignFrame(int alignment) {
22  int alignment_slots = alignment / kPointerSize;
23  int delta = alignment_slots - (frame_slot_count_ & (alignment_slots - 1));
24  if (delta != alignment_slots) {
25    frame_slot_count_ += delta;
26    if (spill_slot_count_ != 0) {
27      spill_slot_count_ += delta;
28    }
29  }
30  return delta;
31}
32
33void FrameAccessState::MarkHasFrame(bool state) {
34  has_frame_ = state;
35  SetFrameAccessToDefault();
36}
37
38void FrameAccessState::SetFrameAccessToDefault() {
39  if (has_frame() && !FLAG_turbo_sp_frame_access) {
40    SetFrameAccessToFP();
41  } else {
42    SetFrameAccessToSP();
43  }
44}
45
46
47FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const {
48  const int frame_offset = FrameSlotToFPOffset(spill_slot);
49  if (access_frame_with_fp()) {
50    return FrameOffset::FromFramePointer(frame_offset);
51  } else {
52    // No frame. Retrieve all parameters relative to stack pointer.
53    int sp_offset = frame_offset + GetSPToFPOffset();
54    return FrameOffset::FromStackPointer(sp_offset);
55  }
56}
57
58
59}  // namespace compiler
60}  // namespace internal
61}  // namespace v8
62