Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 94 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/SlowPathCall.h b/Source/JavaScriptCore/jit/SlowPathCall.h
new file mode 100644
index 000000000..55da60cd0
--- /dev/null
+++ b/Source/JavaScriptCore/jit/SlowPathCall.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2013 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. 
+ */
+
+#ifndef SlowPathCall_h
+#define SlowPathCall_h
+
+#include "CommonSlowPaths.h"
+#include "MacroAssemblerCodeRef.h"
+
+#if ENABLE(JIT)
+
+namespace JSC {
+
+class JITSlowPathCall {
+public:
+    JITSlowPathCall(JIT* jit, Instruction* pc, SlowPathReturnType (SLOW_PATH *stub)(ExecState* exec, Instruction* pc))
+        : m_jit(jit)
+        , m_stub(stub)
+        , m_pc(pc)
+    {
+    }
+
+    JIT::Call call()
+    {
+#if ENABLE(OPCODE_SAMPLING)
+        if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
+            m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + m_jit->m_bytecodeOffset, true);
+#endif
+        m_jit->updateTopCallFrame();
+#if CPU(X86) && USE(JSVALUE32_64)
+        m_jit->addPtr(MacroAssembler::TrustedImm32(-8), MacroAssembler::stackPointerRegister);
+        m_jit->push(JIT::TrustedImm32(JIT::TrustedImmPtr(m_pc)));
+        m_jit->push(JIT::callFrameRegister);
+#elif CPU(X86_64) && OS(WINDOWS)
+        m_jit->addPtr(MacroAssembler::TrustedImm32(-16), MacroAssembler::stackPointerRegister);
+        m_jit->move(MacroAssembler::stackPointerRegister, JIT::argumentGPR0);
+        m_jit->move(JIT::callFrameRegister, JIT::argumentGPR1);
+        m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR2);
+#else
+        m_jit->move(JIT::callFrameRegister, JIT::argumentGPR0);
+        m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR1);
+#endif
+        JIT::Call call = m_jit->call();
+        m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeOffset, m_stub.value()));
+
+#if CPU(X86) && USE(JSVALUE32_64)
+        m_jit->addPtr(MacroAssembler::TrustedImm32(16), MacroAssembler::stackPointerRegister);
+#elif CPU(X86_64) && OS(WINDOWS)
+        m_jit->pop(JIT::regT0); // vPC
+        m_jit->pop(JIT::regT1); // callFrame register
+#endif
+
+#if ENABLE(OPCODE_SAMPLING)
+        if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
+            m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + m_jit->m_bytecodeOffset, false);
+#endif
+        
+        m_jit->exceptionCheck();
+        return call;
+    }
+
+private:
+    JIT* m_jit;
+    FunctionPtr m_stub;
+    Instruction* m_pc;
+};
+
+} // namespace JS
+
+#endif // ENABLE(JIT)
+
+#endif // SlowPathCall_h