Get WebKit r44544.

1 files changed, 170 insertions, 0 deletions

diff --git a/JavaScriptCore/jit/JITStubCall.h b/JavaScriptCore/jit/JITStubCall.h
new file mode 100644
index 0000000..6c9ccc1
--- /dev/null
+++ b/JavaScriptCore/jit/JITStubCall.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2008 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 JITStubCall_h
+#define JITStubCall_h
+
+#include <wtf/Platform.h>
+
+#if ENABLE(JIT)
+
+namespace JSC {
+
+    class JITStubCall {
+    public:
+        JITStubCall(JIT* jit, JSObject* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
+            : m_jit(jit)
+            , m_stub(reinterpret_cast<void*>(stub))
+            , m_returnType(Value)
+            , m_argumentIndex(1) // Index 0 is reserved for restoreArgumentReference();
+        {
+        }
+
+        JITStubCall(JIT* jit, JSPropertyNameIterator* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
+            : m_jit(jit)
+            , m_stub(reinterpret_cast<void*>(stub))
+            , m_returnType(Value)
+            , m_argumentIndex(1) // Index 0 is reserved for restoreArgumentReference();
+        {
+        }
+
+        JITStubCall(JIT* jit, void* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
+            : m_jit(jit)
+            , m_stub(reinterpret_cast<void*>(stub))
+            , m_returnType(Value)
+            , m_argumentIndex(1) // Index 0 is reserved for restoreArgumentReference();
+        {
+        }
+
+        JITStubCall(JIT* jit, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
+            : m_jit(jit)
+            , m_stub(reinterpret_cast<void*>(stub))
+            , m_returnType(Value)
+            , m_argumentIndex(1) // Index 0 is reserved for restoreArgumentReference();
+        {
+        }
+
+        JITStubCall(JIT* jit, void (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
+            : m_jit(jit)
+            , m_stub(reinterpret_cast<void*>(stub))
+            , m_returnType(Void)
+            , m_argumentIndex(1) // Index 0 is reserved for restoreArgumentReference();
+        {
+        }
+
+        // Arguments are added first to last.
+
+        void addArgument(JIT::Imm32 argument)
+        {
+            m_jit->poke(argument, m_argumentIndex);
+            ++m_argumentIndex;
+        }
+
+        void addArgument(JIT::ImmPtr argument)
+        {
+            m_jit->poke(argument, m_argumentIndex);
+            ++m_argumentIndex;
+        }
+
+        void addArgument(JIT::RegisterID argument)
+        {
+            m_jit->poke(argument, m_argumentIndex);
+            ++m_argumentIndex;
+        }
+
+        void addArgument(unsigned src, JIT::RegisterID scratchRegister) // src is a virtual register.
+        {
+            if (m_jit->m_codeBlock->isConstantRegisterIndex(src))
+                addArgument(JIT::ImmPtr(JSValue::encode(m_jit->m_codeBlock->getConstant(src))));
+            else {
+                m_jit->loadPtr(JIT::Address(JIT::callFrameRegister, src * sizeof(Register)), scratchRegister);
+                addArgument(scratchRegister);
+            }
+            m_jit->killLastResultRegister();
+        }
+
+        JIT::Call call()
+        {
+            ASSERT(m_jit->m_bytecodeIndex != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeIndex is set.
+
+#if ENABLE(OPCODE_SAMPLING)
+            m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + m_jit->m_bytecodeIndex, true);
+#endif
+
+            m_jit->restoreArgumentReference();
+            JIT::Call call = m_jit->call();
+            m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeIndex, m_stub));
+
+#if ENABLE(OPCODE_SAMPLING)
+            m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + m_jit->m_bytecodeIndex, false);
+#endif
+
+            m_jit->killLastResultRegister();
+            return call;
+        }
+
+        JIT::Call call(unsigned dst) // dst is a virtual register.
+        {
+            ASSERT(m_returnType == Value);
+            JIT::Call call = this->call();
+            m_jit->emitPutVirtualRegister(dst);
+            return call;
+        }
+
+        JIT::Call call(JIT::RegisterID dst)
+        {
+            ASSERT(m_returnType == Value);
+            JIT::Call call = this->call();
+            if (dst != JIT::returnValueRegister)
+                m_jit->move(JIT::returnValueRegister, dst);
+            return call;
+        }
+
+    private:
+        JIT* m_jit;
+        void* m_stub;
+        enum { Value, Void } m_returnType;
+        size_t m_argumentIndex;
+    };
+
+    class CallEvalJITStub : public JITStubCall {
+    public:
+        CallEvalJITStub(JIT* jit, Instruction* instruction)
+            : JITStubCall(jit, JITStubs::cti_op_call_eval)
+        {
+            int callee = instruction[2].u.operand;
+            int argCount = instruction[3].u.operand;
+            int registerOffset = instruction[4].u.operand;
+
+            addArgument(callee, JIT::regT2);
+            addArgument(JIT::Imm32(registerOffset));
+            addArgument(JIT::Imm32(argCount));
+        }
+    };
+}
+
+#endif // ENABLE(JIT)
+
+#endif // JITStubCall_h