| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| * vim: set ts=8 sts=4 et sw=4 tw=99: |
| * This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| #ifndef jit_MoveEmitter_x86_shared_h |
| #define jit_MoveEmitter_x86_shared_h |
| |
| #include "jit/MacroAssembler.h" |
| #include "jit/MoveResolver.h" |
| |
| namespace js { |
| namespace jit { |
| |
| class MoveEmitterX86 |
| { |
| bool inCycle_; |
| MacroAssembler& masm; |
| |
| // Original stack push value. |
| uint32_t pushedAtStart_; |
| |
| // This is a store stack offset for the cycle-break spill slot, snapshotting |
| // codegen->framePushed_ at the time it is allocated. -1 if not allocated. |
| int32_t pushedAtCycle_; |
| |
| #ifdef JS_CODEGEN_X86 |
| // Optional scratch register for performing moves. |
| mozilla::Maybe<Register> scratchRegister_; |
| #endif |
| |
| void assertDone(); |
| Address cycleSlot(); |
| Address toAddress(const MoveOperand& operand) const; |
| Operand toOperand(const MoveOperand& operand) const; |
| Operand toPopOperand(const MoveOperand& operand) const; |
| |
| size_t characterizeCycle(const MoveResolver& moves, size_t i, |
| bool* allGeneralRegs, bool* allFloatRegs); |
| bool maybeEmitOptimizedCycle(const MoveResolver& moves, size_t i, |
| bool allGeneralRegs, bool allFloatRegs, size_t swapCount); |
| void emitInt32Move(const MoveOperand& from, const MoveOperand& to, |
| const MoveResolver& moves, size_t i); |
| void emitGeneralMove(const MoveOperand& from, const MoveOperand& to, |
| const MoveResolver& moves, size_t i); |
| void emitFloat32Move(const MoveOperand& from, const MoveOperand& to); |
| void emitDoubleMove(const MoveOperand& from, const MoveOperand& to); |
| void emitFloat32X4Move(const MoveOperand& from, const MoveOperand& to); |
| void emitInt32X4Move(const MoveOperand& from, const MoveOperand& to); |
| void breakCycle(const MoveOperand& to, MoveOp::Type type); |
| void completeCycle(const MoveOperand& to, MoveOp::Type type); |
| |
| public: |
| explicit MoveEmitterX86(MacroAssembler& masm); |
| ~MoveEmitterX86(); |
| void emit(const MoveResolver& moves); |
| void finish(); |
| |
| void setScratchRegister(Register reg) { |
| #ifdef JS_CODEGEN_X86 |
| scratchRegister_.emplace(reg); |
| #endif |
| } |
| |
| mozilla::Maybe<Register> findScratchRegister(const MoveResolver& moves, size_t i); |
| }; |
| |
| typedef MoveEmitterX86 MoveEmitter; |
| |
| } // namespace jit |
| } // namespace js |
| |
| #endif /* jit_MoveEmitter_x86_shared_h */ |