dfg/DFGAssemblyHelpers.cpp

   1 /*
   2  * Copyright (C) 2011 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 "DFGAssemblyHelpers.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 namespace JSC { namespace DFG {
  32
  33 const double AssemblyHelpers::twoToThe32 = (double)0x100000000ull;
  34
  35 Vector<BytecodeAndMachineOffset>& AssemblyHelpers::decodedCodeMapFor(CodeBlock* codeBlock)
  36 {
  37     ASSERT(codeBlock == codeBlock->baselineVersion());
  38     ASSERT(codeBlock->getJITType() == JITCode::BaselineJIT);
  39     ASSERT(codeBlock->jitCodeMap());
  40
  41     HashMap<CodeBlock*, Vector<BytecodeAndMachineOffset> >::AddResult result = m_decodedCodeMaps.add(codeBlock, Vector<BytecodeAndMachineOffset>());
  42
  43     if (result.isNewEntry)
  44         codeBlock->jitCodeMap()->decode(result.iterator->second);
  45
  46     return result.iterator->second;
  47 }
  48
  49 #if ENABLE(SAMPLING_FLAGS)
  50 void AssemblyHelpers::setSamplingFlag(int32_t flag)
  51 {
  52     ASSERT(flag >= 1);
  53     ASSERT(flag <= 32);
  54     or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags()));
  55 }
  56
  57 void AssemblyHelpers::clearSamplingFlag(int32_t flag)
  58 {
  59     ASSERT(flag >= 1);
  60     ASSERT(flag <= 32);
  61     and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags()));
  62 }
  63 #endif
  64
  65 #if DFG_ENABLE(JIT_ASSERT)
  66 #if USE(JSVALUE64)
  67 void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
  68 {
  69 #if CPU(X86_64)
  70     Jump checkInt32 = branchPtr(BelowOrEqual, gpr, TrustedImmPtr(reinterpret_cast<void*>(static_cast<uintptr_t>(0xFFFFFFFFu))));
  71     breakpoint();
  72     checkInt32.link(this);
  73 #else
  74     UNUSED_PARAM(gpr);
  75 #endif
  76 }
  77
  78 void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
  79 {
  80     Jump checkJSInt32 = branchPtr(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
  81     breakpoint();
  82     checkJSInt32.link(this);
  83 }
  84
  85 void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
  86 {
  87     Jump checkJSNumber = branchTestPtr(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
  88     breakpoint();
  89     checkJSNumber.link(this);
  90 }
  91
  92 void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
  93 {
  94     Jump checkJSInt32 = branchPtr(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
  95     Jump checkJSNumber = branchTestPtr(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
  96     checkJSInt32.link(this);
  97     breakpoint();
  98     checkJSNumber.link(this);
  99 }
 100
 101 void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 102 {
 103     Jump checkCell = branchTestPtr(MacroAssembler::Zero, gpr, GPRInfo::tagMaskRegister);
 104     breakpoint();
 105     checkCell.link(this);
 106 }
 107 #elif USE(JSVALUE32_64)
 108 void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
 109 {
 110     UNUSED_PARAM(gpr);
 111 }
 112
 113 void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
 114 {
 115     Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 116     breakpoint();
 117     checkJSInt32.link(this);
 118 }
 119
 120 void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
 121 {
 122     Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 123     Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 124     breakpoint();
 125     checkJSInt32.link(this);
 126     checkJSDouble.link(this);
 127 }
 128
 129 void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
 130 {
 131     Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 132     breakpoint();
 133     checkJSDouble.link(this);
 134 }
 135
 136 void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 137 {
 138     Jump checkCell = branch32(Equal, gpr, TrustedImm32(JSValue::CellTag));
 139     breakpoint();
 140     checkCell.link(this);
 141 }
 142 #endif // USE(JSVALUE32_64)
 143
 144 void AssemblyHelpers::jitAssertHasValidCallFrame()
 145 {
 146     Jump checkCFR = branchTestPtr(Zero, GPRInfo::callFrameRegister, TrustedImm32(7));
 147     breakpoint();
 148     checkCFR.link(this);
 149 }
 150 #endif // DFG_ENABLE(JIT_ASSERT)
 151
 152 } } // namespace JSC::DFG
 153
 154 #endif // ENABLE(DFG_JIT)
 155