1// Copyright 2021 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#ifndef V8_BASELINE_MIPS_BASELINE_COMPILER_MIPS_INL_H_
6#define V8_BASELINE_MIPS_BASELINE_COMPILER_MIPS_INL_H_
7
8#include "src/base/logging.h"
9#include "src/baseline/baseline-compiler.h"
10
11namespace v8 {
12namespace internal {
13namespace baseline {
14
15#define __ basm_.
16
17void BaselineCompiler::Prologue() {
18  ASM_CODE_COMMENT(&masm_);
19  __ masm()->EnterFrame(StackFrame::BASELINE);
20  DCHECK_EQ(kJSFunctionRegister, kJavaScriptCallTargetRegister);
21  int max_frame_size =
22      bytecode_->frame_size() + max_call_args_ * kSystemPointerSize;
23  CallBuiltin<Builtin::kBaselineOutOfLinePrologue>(
24      kContextRegister, kJSFunctionRegister, kJavaScriptCallArgCountRegister,
25      max_frame_size, kJavaScriptCallNewTargetRegister, bytecode_);
26
27  PrologueFillFrame();
28}
29
30void BaselineCompiler::PrologueFillFrame() {
31  ASM_CODE_COMMENT(&masm_);
32  // Inlined register frame fill
33  interpreter::Register new_target_or_generator_register =
34      bytecode_->incoming_new_target_or_generator_register();
35  __ LoadRoot(kInterpreterAccumulatorRegister, RootIndex::kUndefinedValue);
36  int register_count = bytecode_->register_count();
37  // Magic value
38  const int kLoopUnrollSize = 8;
39  const int new_target_index = new_target_or_generator_register.index();
40  const bool has_new_target = new_target_index != kMaxInt;
41  if (has_new_target) {
42    DCHECK_LE(new_target_index, register_count);
43    __ masm()->Addu(sp, sp, Operand(-(kPointerSize * new_target_index)));
44    for (int i = 0; i < new_target_index; i++) {
45      __ masm()->Sw(kInterpreterAccumulatorRegister, MemOperand(sp, i * 4));
46    }
47    // Push new_target_or_generator.
48    __ Push(kJavaScriptCallNewTargetRegister);
49    register_count -= new_target_index + 1;
50  }
51  if (register_count < 2 * kLoopUnrollSize) {
52    // If the frame is small enough, just unroll the frame fill completely.
53    __ masm()->Addu(sp, sp, Operand(-(kPointerSize * register_count)));
54    for (int i = 0; i < register_count; ++i) {
55      __ masm()->Sw(kInterpreterAccumulatorRegister, MemOperand(sp, i * 4));
56    }
57  } else {
58    __ masm()->Addu(sp, sp, Operand(-(kPointerSize * register_count)));
59    for (int i = 0; i < register_count; ++i) {
60      __ masm()->Sw(kInterpreterAccumulatorRegister, MemOperand(sp, i * 4));
61    }
62  }
63}
64
65void BaselineCompiler::VerifyFrameSize() {
66  ASM_CODE_COMMENT(&masm_);
67  __ masm()->Addu(kScratchReg, sp,
68                  Operand(InterpreterFrameConstants::kFixedFrameSizeFromFp +
69                          bytecode_->frame_size()));
70  __ masm()->Assert(eq, AbortReason::kUnexpectedStackPointer, kScratchReg,
71                    Operand(fp));
72}
73
74}  // namespace baseline
75}  // namespace internal
76}  // namespace v8
77
78#endif  // V8_BASELINE_MIPS_BASELINE_COMPILER_MIPS_INL_H_
79