JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / ftl / FTLJSCallBase.cpp

diff --git a/ftl/FTLJSCallBase.cpp b/ftl/FTLJSCallBase.cpp
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+/*
+ * Copyright (C) 2015 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. 
+ */
+
+#include "config.h"
+#include "FTLJSCallBase.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "DFGNode.h"
+#include "LinkBuffer.h"
+
+namespace JSC { namespace FTL {
+
+using namespace DFG;
+
+JSCallBase::JSCallBase()
+    : m_type(CallLinkInfo::None)
+    , m_callLinkInfo(nullptr)
+{
+}
+
+JSCallBase::JSCallBase(CallLinkInfo::CallType type, CodeOrigin origin)
+    : m_type(type)
+    , m_origin(origin)
+    , m_callLinkInfo(nullptr)
+{
+}
+
+void JSCallBase::emit(CCallHelpers& jit)
+{
+    m_callLinkInfo = jit.codeBlock()->addCallLinkInfo();
+    
+    CCallHelpers::Jump slowPath = jit.branchPtrWithPatch(
+        CCallHelpers::NotEqual, GPRInfo::regT0, m_targetToCheck,
+        CCallHelpers::TrustedImmPtr(0));
+    
+    m_fastCall = jit.nearCall();
+    CCallHelpers::Jump done = jit.jump();
+    
+    slowPath.link(&jit);
+    
+    jit.move(CCallHelpers::TrustedImmPtr(m_callLinkInfo), GPRInfo::regT2);
+    m_slowCall = jit.nearCall();
+    
+    done.link(&jit);
+}
+
+void JSCallBase::link(VM& vm, LinkBuffer& linkBuffer)
+{
+    ThunkGenerator generator = linkThunkGeneratorFor(
+        CallLinkInfo::specializationKindFor(m_type), MustPreserveRegisters);
+    
+    linkBuffer.link(
+        m_slowCall, FunctionPtr(vm.getCTIStub(generator).code().executableAddress()));
+
+    m_callLinkInfo->setUpCallFromFTL(m_type, m_origin, linkBuffer.locationOfNearCall(m_slowCall),
+        linkBuffer.locationOf(m_targetToCheck), linkBuffer.locationOfNearCall(m_fastCall),
+        GPRInfo::regT0);
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+