projects / apple / javascriptcore.git / blame
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|---|---|---|
| ed1e77d3 A |
1 | /* |
| 2 | * Copyright (C) 2015 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * Redistribution and use in source and binary forms, with or without | |
| 5 | * modification, are permitted provided that the following conditions | |
| 6 | * are met: | |
| 7 | * 1. Redistributions of source code must retain the above copyright | |
| 8 | * notice, this list of conditions and the following disclaimer. | |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 | * notice, this list of conditions and the following disclaimer in the | |
| 11 | * documentation and/or other materials provided with the distribution. | |
| 12 | * | |
| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 | */ | |
| 25 | ||
| 26 | #include "config.h" | |
| 27 | #include "FTLJSCallBase.h" | |
| 28 | ||
| 29 | #if ENABLE(FTL_JIT) | |
| 30 | ||
| 31 | #include "DFGNode.h" | |
| 32 | #include "LinkBuffer.h" | |
| 33 | ||
| 34 | namespace JSC { namespace FTL { | |
| 35 | ||
| 36 | using namespace DFG; | |
| 37 | ||
| 38 | JSCallBase::JSCallBase() | |
| 39 | : m_type(CallLinkInfo::None) | |
| 40 | , m_callLinkInfo(nullptr) | |
| 41 | { | |
| 42 | } | |
| 43 | ||
| 44 | JSCallBase::JSCallBase(CallLinkInfo::CallType type, CodeOrigin origin) | |
| 45 | : m_type(type) | |
| 46 | , m_origin(origin) | |
| 47 | , m_callLinkInfo(nullptr) | |
| 48 | { | |
| 49 | } | |
| 50 | ||
| 51 | void JSCallBase::emit(CCallHelpers& jit) | |
| 52 | { | |
| 53 | m_callLinkInfo = jit.codeBlock()->addCallLinkInfo(); | |
| 54 | ||
| 55 | CCallHelpers::Jump slowPath = jit.branchPtrWithPatch( | |
| 56 | CCallHelpers::NotEqual, GPRInfo::regT0, m_targetToCheck, | |
| 57 | CCallHelpers::TrustedImmPtr(0)); | |
| 58 | ||
| 59 | m_fastCall = jit.nearCall(); | |
| 60 | CCallHelpers::Jump done = jit.jump(); | |
| 61 | ||
| 62 | slowPath.link(&jit); | |
| 63 | ||
| 64 | jit.move(CCallHelpers::TrustedImmPtr(m_callLinkInfo), GPRInfo::regT2); | |
| 65 | m_slowCall = jit.nearCall(); | |
| 66 | ||
| 67 | done.link(&jit); | |
| 68 | } | |
| 69 | ||
| 70 | void JSCallBase::link(VM& vm, LinkBuffer& linkBuffer) | |
| 71 | { | |
| 72 | ThunkGenerator generator = linkThunkGeneratorFor( | |
| 73 | CallLinkInfo::specializationKindFor(m_type), MustPreserveRegisters); | |
| 74 | ||
| 75 | linkBuffer.link( | |
| 76 | m_slowCall, FunctionPtr(vm.getCTIStub(generator).code().executableAddress())); | |
| 77 | ||
| 78 | m_callLinkInfo->setUpCallFromFTL(m_type, m_origin, linkBuffer.locationOfNearCall(m_slowCall), | |
| 79 | linkBuffer.locationOf(m_targetToCheck), linkBuffer.locationOfNearCall(m_fastCall), | |
| 80 | GPRInfo::regT0); | |
| 81 | } | |
| 82 | ||
| 83 | } } // namespace JSC::FTL | |
| 84 | ||
| 85 | #endif // ENABLE(FTL_JIT) | |
| 86 |