| /* |
| * Copyright (C) 2018 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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 with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "DFGOperations.h" |
| #include "DFGSlowPathGenerator.h" |
| #include "DFGSpeculativeJIT.h" |
| #include "DirectArguments.h" |
| |
| namespace JSC { namespace DFG { |
| |
| // This calls operationCreateDirectArguments but then restores the value of storageGPR. |
| class CallCreateDirectArgumentsWithKnownLengthSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> { |
| public: |
| CallCreateDirectArgumentsWithKnownLengthSlowPathGenerator( |
| MacroAssembler::JumpList from, SpeculativeJIT* jit, GPRReg resultGPR, RegisteredStructure structure, |
| unsigned knownLength, GPRReg storageGPR, unsigned minCapacity) |
| : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit) |
| , m_resultGPR(resultGPR) |
| , m_structure(structure) |
| , m_knownLength(knownLength) |
| , m_storageGPR(storageGPR) |
| , m_minCapacity(minCapacity) |
| { |
| jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR); |
| } |
| |
| protected: |
| void generateInternal(SpeculativeJIT* jit) override |
| { |
| linkFrom(jit); |
| for (unsigned i = 0; i < m_plans.size(); ++i) |
| jit->silentSpill(m_plans[i]); |
| jit->callOperation( |
| operationCreateDirectArguments, m_resultGPR, m_structure, m_knownLength, m_minCapacity); |
| for (unsigned i = m_plans.size(); i--;) |
| jit->silentFill(m_plans[i]); |
| jit->m_jit.exceptionCheck(); |
| jit->m_jit.loadPtr( |
| MacroAssembler::Address(m_resultGPR, DirectArguments::offsetOfStorage()), m_storageGPR); |
| jit->m_jit.xorPtr( |
| MacroAssembler::TrustedImmPtr(DirectArgumentsPoison::key()), m_storageGPR); |
| jumpTo(jit); |
| } |
| |
| private: |
| GPRReg m_resultGPR; |
| RegisteredStructure m_structure; |
| unsigned m_knownLength; |
| GPRReg m_storageGPR; |
| unsigned m_minCapacity; |
| Vector<SilentRegisterSavePlan, 2> m_plans; |
| }; |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |