tor-browser

The Tor Browser
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Lowering-x64.h (3021B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 * vim: set ts=8 sts=2 et sw=2 tw=80:
      3 * This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef jit_x64_Lowering_x64_h
      8 #define jit_x64_Lowering_x64_h
      9 
     10 #include "jit/x86-shared/Lowering-x86-shared.h"
     11 
     12 namespace js {
     13 namespace jit {
     14 
     15 class LIRGeneratorX64 : public LIRGeneratorX86Shared {
     16 protected:
     17  LIRGeneratorX64(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph)
     18      : LIRGeneratorX86Shared(gen, graph, lirGraph) {}
     19 
     20  void lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,
     21                            size_t lirIndex);
     22  void lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,
     23                          size_t lirIndex);
     24  void defineInt64Phi(MPhi* phi, size_t lirIndex);
     25 
     26  void lowerForALUInt64(LInstructionHelper<INT64_PIECES, INT64_PIECES, 0>* ins,
     27                        MDefinition* mir, MDefinition* input);
     28  void lowerForALUInt64(
     29      LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins,
     30      MDefinition* mir, MDefinition* lhs, MDefinition* rhs);
     31  void lowerForMulInt64(LMulI64* ins, MMul* mir, MDefinition* lhs,
     32                        MDefinition* rhs);
     33 
     34  template <class LInstr>
     35  void lowerForShiftInt64(LInstr* ins, MDefinition* mir, MDefinition* lhs,
     36                          MDefinition* rhs);
     37 
     38  // Returns a box allocation. reg2 is ignored on 64-bit platforms.
     39  LBoxAllocation useBoxFixed(MDefinition* mir, Register reg1, Register,
     40                             bool useAtStart = false);
     41 
     42  // x86 has constraints on what registers can be formatted for 1-byte
     43  // stores and loads; on x64 all registers are okay.
     44  LAllocation useByteOpRegister(MDefinition* mir);
     45  LAllocation useByteOpRegisterAtStart(MDefinition* mir);
     46  LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir);
     47  LDefinition tempByteOpRegister();
     48 
     49  LDefinition tempToUnbox();
     50 
     51  bool needTempForPostBarrier() { return true; }
     52 
     53  void lowerTruncateDToInt32(MTruncateToInt32* ins);
     54  void lowerTruncateFToInt32(MTruncateToInt32* ins);
     55  void lowerBuiltinInt64ToFloatingPoint(MBuiltinInt64ToFloatingPoint* ins);
     56  void lowerWasmBuiltinTruncateToInt32(MWasmBuiltinTruncateToInt32* ins);
     57  void lowerWasmBuiltinTruncateToInt64(MWasmBuiltinTruncateToInt64* ins);
     58  void lowerDivI64(MDiv* div);
     59  void lowerWasmBuiltinDivI64(MWasmBuiltinDivI64* div);
     60  void lowerModI64(MMod* mod);
     61  void lowerWasmBuiltinModI64(MWasmBuiltinModI64* mod);
     62  void lowerUDivI64(MDiv* div);
     63  void lowerUModI64(MMod* mod);
     64 
     65  void lowerBigIntPtrDiv(MBigIntPtrDiv* ins);
     66  void lowerBigIntPtrMod(MBigIntPtrMod* ins);
     67 
     68  void lowerAtomicLoad64(MLoadUnboxedScalar* ins);
     69  void lowerAtomicStore64(MStoreUnboxedScalar* ins);
     70 };
     71 
     72 using LIRGeneratorSpecific = LIRGeneratorX64;
     73 
     74 }  // namespace jit
     75 }  // namespace js
     76 
     77 #endif /* jit_x64_Lowering_x64_h */