--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/jit/JITCall.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,261 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+
+#if ENABLE(JIT)
+#if !USE(JSVALUE32_64)
+#include "JIT.h"
+
+#include "CodeBlock.h"
+#include "JITInlineMethods.h"
+#include "JITStubCall.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "Interpreter.h"
+#include "ResultType.h"
+#include "SamplingTool.h"
+
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
+using namespace std;
+
+namespace JSC {
+
+void JIT::compileOpCallInitializeCallFrame()
+{
+ store32(regT1, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT3); // newScopeChain
+ storePtr(regT0, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register))));
+ storePtr(regT3, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register))));
+}
+
+void JIT::emit_op_call_put_result(Instruction* instruction)
+{
+ int dst = instruction[1].u.operand;
+ emitPutVirtualRegister(dst);
+}
+
+void JIT::compileOpCallVarargs(Instruction* instruction)
+{
+ int callee = instruction[1].u.operand;
+ int argCountRegister = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
+
+ emitGetVirtualRegister(argCountRegister, regT1);
+ emitGetVirtualRegister(callee, regT0);
+ addPtr(Imm32(registerOffset), regT1, regT2);
+
+ // Check for JSFunctions.
+ emitJumpSlowCaseIfNotJSCell(regT0);
+ addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ mul32(Imm32(sizeof(Register)), regT2, regT2);
+ intptr_t offset = (intptr_t)sizeof(Register) * (intptr_t)RegisterFile::CallerFrame;
+ addPtr(Imm32((int32_t)offset), regT2, regT3);
+ addPtr(callFrameRegister, regT3);
+ storePtr(callFrameRegister, regT3);
+ addPtr(regT2, callFrameRegister);
+ emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallVarargsSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator& iter)
+{
+ linkSlowCase(iter);
+ linkSlowCase(iter);
+
+ JITStubCall stubCall(this, cti_op_call_NotJSFunction);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(regT2);
+ stubCall.addArgument(regT1);
+ stubCall.call();
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+#if !ENABLE(JIT_OPTIMIZE_CALL)
+
+/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
+{
+ int callee = instruction[1].u.operand;
+ int argCount = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
+
+ // Handle eval
+ Jump wasEval;
+ if (opcodeID == op_call_eval) {
+ JITStubCall stubCall(this, cti_op_call_eval);
+ stubCall.addArgument(callee, regT0);
+ stubCall.addArgument(JIT::Imm32(registerOffset));
+ stubCall.addArgument(JIT::Imm32(argCount));
+ stubCall.call();
+ wasEval = branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue())));
+ }
+
+ emitGetVirtualRegister(callee, regT0);
+
+ // Check for JSFunctions.
+ emitJumpSlowCaseIfNotJSCell(regT0);
+ addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+ move(Imm32(argCount), regT1);
+
+ emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstruct() : m_globalData->jitStubs->ctiVirtualCall());
+
+ if (opcodeID == op_call_eval)
+ wasEval.link(this);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned, OpcodeID opcodeID)
+{
+ int argCount = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
+
+ linkSlowCase(iter);
+ linkSlowCase(iter);
+
+ JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(JIT::Imm32(registerOffset));
+ stubCall.addArgument(JIT::Imm32(argCount));
+ stubCall.call();
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+#else // !ENABLE(JIT_OPTIMIZE_CALL)
+
+/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
+{
+ int callee = instruction[1].u.operand;
+ int argCount = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
+
+ // Handle eval
+ Jump wasEval;
+ if (opcodeID == op_call_eval) {
+ JITStubCall stubCall(this, cti_op_call_eval);
+ stubCall.addArgument(callee, regT0);
+ stubCall.addArgument(JIT::Imm32(registerOffset));
+ stubCall.addArgument(JIT::Imm32(argCount));
+ stubCall.call();
+ wasEval = branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue())));
+ }
+
+ // This plants a check for a cached JSFunction value, so we can plant a fast link to the callee.
+ // This deliberately leaves the callee in ecx, used when setting up the stack frame below
+ emitGetVirtualRegister(callee, regT0);
+ DataLabelPtr addressOfLinkedFunctionCheck;
+
+ BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
+ Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, ImmPtr(JSValue::encode(JSValue())));
+
+ END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
+ addSlowCase(jumpToSlow);
+ ASSERT_JIT_OFFSET(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow), patchOffsetOpCallCompareToJump);
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
+
+ // The following is the fast case, only used whan a callee can be linked.
+
+ // Fast version of stack frame initialization, directly relative to edi.
+ // Note that this omits to set up RegisterFile::CodeBlock, which is set in the callee
+
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT1); // newScopeChain
+
+ store32(Imm32(argCount), Address(callFrameRegister, (registerOffset + RegisterFile::ArgumentCount) * static_cast<int>(sizeof(Register))));
+ storePtr(callFrameRegister, Address(callFrameRegister, (registerOffset + RegisterFile::CallerFrame) * static_cast<int>(sizeof(Register))));
+ storePtr(regT0, Address(callFrameRegister, (registerOffset + RegisterFile::Callee) * static_cast<int>(sizeof(Register))));
+ storePtr(regT1, Address(callFrameRegister, (registerOffset + RegisterFile::ScopeChain) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
+
+ // Call to the callee
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+
+ if (opcodeID == op_call_eval)
+ wasEval.link(this);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
+{
+ int argCount = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
+
+ linkSlowCase(iter);
+
+ // Fast check for JS function.
+ Jump callLinkFailNotObject = emitJumpIfNotJSCell(regT0);
+ Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr));
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+ move(Imm32(argCount), regT1);
+
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
+
+ // Done! - return back to the hot path.
+ ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
+ ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct));
+ emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
+
+ // This handles host functions
+ callLinkFailNotObject.link(this);
+ callLinkFailNotJSFunction.link(this);
+
+ JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(JIT::Imm32(registerOffset));
+ stubCall.addArgument(JIT::Imm32(argCount));
+ stubCall.call();
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+#endif // !ENABLE(JIT_OPTIMIZE_CALL)
+
+} // namespace JSC
+
+#endif // !USE(JSVALUE32_64)
+#endif // ENABLE(JIT)