Move backend specific files to separate directories.

src/macro-assembler-ia32.cc

Index: src/macro-assembler-ia32.cc
diff --git a/src/macro-assembler-ia32.cc b/src/macro-assembler-ia32.cc
deleted file mode 100644
index d6d5800fe6b87c3020971e31213fe5a6a49137f5..0000000000000000000000000000000000000000
--- a/src/macro-assembler-ia32.cc
+++ /dev/null
@@ -1,1051 +0,0 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * 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.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "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 THE COPYRIGHT
-// OWNER 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 "v8.h"
-
-#include "bootstrapper.h"
-#include "codegen-inl.h"
-#include "debug.h"
-#include "runtime.h"
-#include "serialize.h"
-
-namespace v8 { namespace internal {
-
-// -------------------------------------------------------------------------
-// MacroAssembler implementation.
-
-MacroAssembler::MacroAssembler(void* buffer, int size)
-    : Assembler(buffer, size),
-      unresolved_(0),
-      generating_stub_(false),
-      allow_stub_calls_(true),
-      code_object_(Heap::undefined_value()) {
-}
-
-
-static void RecordWriteHelper(MacroAssembler* masm,
-                              Register object,
-                              Register addr,
-                              Register scratch) {
-  Label fast;
-
-  // Compute the page address from the heap object pointer, leave it
-  // in 'object'.
-  masm->and_(object, ~Page::kPageAlignmentMask);
-
-  // Compute the bit addr in the remembered set, leave it in "addr".
-  masm->sub(addr, Operand(object));
-  masm->shr(addr, kObjectAlignmentBits);
-
-  // If the bit offset lies beyond the normal remembered set range, it is in
-  // the extra remembered set area of a large object.
-  masm->cmp(addr, Page::kPageSize / kPointerSize);
-  masm->j(less, &fast);
-
-  // Adjust 'addr' to be relative to the start of the extra remembered set
-  // and the page address in 'object' to be the address of the extra
-  // remembered set.
-  masm->sub(Operand(addr), Immediate(Page::kPageSize / kPointerSize));
-  // Load the array length into 'scratch' and multiply by four to get the
-  // size in bytes of the elements.
-  masm->mov(scratch, Operand(object, Page::kObjectStartOffset
-                                     + FixedArray::kLengthOffset));
-  masm->shl(scratch, kObjectAlignmentBits);
-  // Add the page header, array header, and array body size to the page
-  // address.
-  masm->add(Operand(object), Immediate(Page::kObjectStartOffset
-                                       + Array::kHeaderSize));
-  masm->add(object, Operand(scratch));
-
-
-  // NOTE: For now, we use the bit-test-and-set (bts) x86 instruction
-  // to limit code size. We should probably evaluate this decision by
-  // measuring the performance of an equivalent implementation using
-  // "simpler" instructions
-  masm->bind(&fast);
-  masm->bts(Operand(object, 0), addr);
-}
-
-
-class RecordWriteStub : public CodeStub {
- public:
-  RecordWriteStub(Register object, Register addr, Register scratch)
-      : object_(object), addr_(addr), scratch_(scratch) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Register object_;
-  Register addr_;
-  Register scratch_;
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RecordWriteStub (object reg %d), (addr reg %d), (scratch reg %d)\n",
-           object_.code(), addr_.code(), scratch_.code());
-  }
-#endif
-
-  // Minor key encoding in 12 bits of three registers (object, address and
-  // scratch) OOOOAAAASSSS.
-  class ScratchBits: public BitField<uint32_t, 0, 4> {};
-  class AddressBits: public BitField<uint32_t, 4, 4> {};
-  class ObjectBits: public BitField<uint32_t, 8, 4> {};
-
-  Major MajorKey() { return RecordWrite; }
-
-  int MinorKey() {
-    // Encode the registers.
-    return ObjectBits::encode(object_.code()) |
-           AddressBits::encode(addr_.code()) |
-           ScratchBits::encode(scratch_.code());
-  }
-};
-
-
-void RecordWriteStub::Generate(MacroAssembler* masm) {
-  RecordWriteHelper(masm, object_, addr_, scratch_);
-  masm->ret(0);
-}
-
-
-// Set the remembered set bit for [object+offset].
-// object is the object being stored into, value is the object being stored.
-// If offset is zero, then the scratch register contains the array index into
-// the elements array represented as a Smi.
-// All registers are clobbered by the operation.
-void MacroAssembler::RecordWrite(Register object, int offset,
-                                 Register value, Register scratch) {
-  // First, check if a remembered set write is even needed. The tests below
-  // catch stores of Smis and stores into young gen (which does not have space
-  // for the remembered set bits.
-  Label done;
-
-  // This optimization cannot survive serialization and deserialization,
-  // so we disable as long as serialization can take place.
-  int32_t new_space_start =
-      reinterpret_cast<int32_t>(ExternalReference::new_space_start().address());
-  if (Serializer::enabled() || new_space_start < 0) {
-    // Cannot do smart bit-twiddling. Need to do two consecutive checks.
-    // Check for Smi first.
-    test(value, Immediate(kSmiTagMask));
-    j(zero, &done);
-    // Test that the object address is not in the new space.  We cannot
-    // set remembered set bits in the new space.
-    mov(value, Operand(object));
-    and_(value, Heap::NewSpaceMask());
-    cmp(Operand(value), Immediate(ExternalReference::new_space_start()));
-    j(equal, &done);
-  } else {
-    // move the value SmiTag into the sign bit
-    shl(value, 31);
-    // combine the object with value SmiTag
-    or_(value, Operand(object));
-    // remove the uninteresing bits inside the page
-    and_(value, Heap::NewSpaceMask() | (1 << 31));
-    // xor has two effects:
-    // - if the value was a smi, then the result will be negative
-    // - if the object is pointing into new space area the page bits will
-    //   all be zero
-    xor_(value, new_space_start | (1 << 31));
-    // Check for both conditions in one branch
-    j(less_equal, &done);
-  }
-
-  if ((offset > 0) && (offset < Page::kMaxHeapObjectSize)) {
-    // Compute the bit offset in the remembered set, leave it in 'value'.
-    mov(value, Operand(object));
-    and_(value, Page::kPageAlignmentMask);
-    add(Operand(value), Immediate(offset));
-    shr(value, kObjectAlignmentBits);
-
-    // Compute the page address from the heap object pointer, leave it in
-    // 'object'.
-    and_(object, ~Page::kPageAlignmentMask);
-
-    // NOTE: For now, we use the bit-test-and-set (bts) x86 instruction
-    // to limit code size. We should probably evaluate this decision by
-    // measuring the performance of an equivalent implementation using
-    // "simpler" instructions
-    bts(Operand(object, 0), value);
-  } else {
-    Register dst = scratch;
-    if (offset != 0) {
-      lea(dst, Operand(object, offset));
-    } else {
-      // array access: calculate the destination address in the same manner as
-      // KeyedStoreIC::GenerateGeneric
-      lea(dst,
-          Operand(object, dst, times_2, Array::kHeaderSize - kHeapObjectTag));
-    }
-    // If we are already generating a shared stub, not inlining the
-    // record write code isn't going to save us any memory.
-    if (generating_stub()) {
-      RecordWriteHelper(this, object, dst, value);
-    } else {
-      RecordWriteStub stub(object, dst, value);
-      CallStub(&stub);
-    }
-  }
-
-  bind(&done);
-}
-
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-void MacroAssembler::SaveRegistersToMemory(RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Copy the content of registers to memory location.
-  for (int i = 0; i < kNumJSCallerSaved; i++) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      Register reg = { r };
-      ExternalReference reg_addr =
-          ExternalReference(Debug_Address::Register(i));
-      mov(Operand::StaticVariable(reg_addr), reg);
-    }
-  }
-}
-
-
-void MacroAssembler::RestoreRegistersFromMemory(RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Copy the content of memory location to registers.
-  for (int i = kNumJSCallerSaved; --i >= 0;) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      Register reg = { r };
-      ExternalReference reg_addr =
-          ExternalReference(Debug_Address::Register(i));
-      mov(reg, Operand::StaticVariable(reg_addr));
-    }
-  }
-}
-
-
-void MacroAssembler::PushRegistersFromMemory(RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Push the content of the memory location to the stack.
-  for (int i = 0; i < kNumJSCallerSaved; i++) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      ExternalReference reg_addr =
-          ExternalReference(Debug_Address::Register(i));
-      push(Operand::StaticVariable(reg_addr));
-    }
-  }
-}
-
-
-void MacroAssembler::PopRegistersToMemory(RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Pop the content from the stack to the memory location.
-  for (int i = kNumJSCallerSaved; --i >= 0;) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      ExternalReference reg_addr =
-          ExternalReference(Debug_Address::Register(i));
-      pop(Operand::StaticVariable(reg_addr));
-    }
-  }
-}
-
-
-void MacroAssembler::CopyRegistersFromStackToMemory(Register base,
-                                                    Register scratch,
-                                                    RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Copy the content of the stack to the memory location and adjust base.
-  for (int i = kNumJSCallerSaved; --i >= 0;) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      mov(scratch, Operand(base, 0));
-      ExternalReference reg_addr =
-          ExternalReference(Debug_Address::Register(i));
-      mov(Operand::StaticVariable(reg_addr), scratch);
-      lea(base, Operand(base, kPointerSize));
-    }
-  }
-}
-#endif
-
-void MacroAssembler::Set(Register dst, const Immediate& x) {
-  if (x.is_zero()) {
-    xor_(dst, Operand(dst));  // shorter than mov
-  } else {
-    mov(dst, x);
-  }
-}
-
-
-void MacroAssembler::Set(const Operand& dst, const Immediate& x) {
-  mov(dst, x);
-}
-
-
-void MacroAssembler::CmpObjectType(Register heap_object,
-                                   InstanceType type,
-                                   Register map) {
-  mov(map, FieldOperand(heap_object, HeapObject::kMapOffset));
-  CmpInstanceType(map, type);
-}
-
-
-void MacroAssembler::CmpInstanceType(Register map, InstanceType type) {
-  cmpb(FieldOperand(map, Map::kInstanceTypeOffset),
-       static_cast<int8_t>(type));
-}
-
-
-void MacroAssembler::FCmp() {
-  fcompp();
-  push(eax);
-  fnstsw_ax();
-  sahf();
-  pop(eax);
-}
-
-
-void MacroAssembler::EnterFrame(StackFrame::Type type) {
-  push(ebp);
-  mov(ebp, Operand(esp));
-  push(esi);
-  push(Immediate(Smi::FromInt(type)));
-  push(Immediate(CodeObject()));
-  if (FLAG_debug_code) {
-    cmp(Operand(esp, 0), Immediate(Factory::undefined_value()));
-    Check(not_equal, "code object not properly patched");
-  }
-}
-
-
-void MacroAssembler::LeaveFrame(StackFrame::Type type) {
-  if (FLAG_debug_code) {
-    cmp(Operand(ebp, StandardFrameConstants::kMarkerOffset),
-        Immediate(Smi::FromInt(type)));
-    Check(equal, "stack frame types must match");
-  }
-  leave();
-}
-
-
-void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
-  ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG);
-
-  // Setup the frame structure on the stack.
-  ASSERT(ExitFrameConstants::kPPDisplacement == +2 * kPointerSize);
-  ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize);
-  ASSERT(ExitFrameConstants::kCallerFPOffset ==  0 * kPointerSize);
-  push(ebp);
-  mov(ebp, Operand(esp));
-
-  // Reserve room for entry stack pointer and push the debug marker.
-  ASSERT(ExitFrameConstants::kSPOffset  == -1 * kPointerSize);
-  push(Immediate(0));  // saved entry sp, patched before call
-  push(Immediate(type == StackFrame::EXIT_DEBUG ? 1 : 0));
-
-  // Save the frame pointer and the context in top.
-  ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address);
-  ExternalReference context_address(Top::k_context_address);
-  mov(Operand::StaticVariable(c_entry_fp_address), ebp);
-  mov(Operand::StaticVariable(context_address), esi);
-
-  // Setup argc and argv in callee-saved registers.
-  int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize;
-  mov(edi, Operand(eax));
-  lea(esi, Operand(ebp, eax, times_4, offset));
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-  // Save the state of all registers to the stack from the memory
-  // location. This is needed to allow nested break points.
-  if (type == StackFrame::EXIT_DEBUG) {
-    // TODO(1243899): This should be symmetric to
-    // CopyRegistersFromStackToMemory() but it isn't! esp is assumed
-    // correct here, but computed for the other call. Very error
-    // prone! FIX THIS.  Actually there are deeper problems with
-    // register saving than this asymmetry (see the bug report
-    // associated with this issue).
-    PushRegistersFromMemory(kJSCallerSaved);
-  }
-#endif
-
-  // Reserve space for two arguments: argc and argv.
-  sub(Operand(esp), Immediate(2 * kPointerSize));
-
-  // Get the required frame alignment for the OS.
-  static const int kFrameAlignment = OS::ActivationFrameAlignment();
-  if (kFrameAlignment > 0) {
-    ASSERT(IsPowerOf2(kFrameAlignment));
-    and_(esp, -kFrameAlignment);
-  }
-
-  // Patch the saved entry sp.
-  mov(Operand(ebp, ExitFrameConstants::kSPOffset), esp);
-}
-
-
-void MacroAssembler::LeaveExitFrame(StackFrame::Type type) {
-#ifdef ENABLE_DEBUGGER_SUPPORT
-  // Restore the memory copy of the registers by digging them out from
-  // the stack. This is needed to allow nested break points.
-  if (type == StackFrame::EXIT_DEBUG) {
-    // It's okay to clobber register ebx below because we don't need
-    // the function pointer after this.
-    const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize;
-    int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize;
-    lea(ebx, Operand(ebp, kOffset));
-    CopyRegistersFromStackToMemory(ebx, ecx, kJSCallerSaved);
-  }
-#endif
-
-  // Get the return address from the stack and restore the frame pointer.
-  mov(ecx, Operand(ebp, 1 * kPointerSize));
-  mov(ebp, Operand(ebp, 0 * kPointerSize));
-
-  // Pop the arguments and the receiver from the caller stack.
-  lea(esp, Operand(esi, 1 * kPointerSize));
-
-  // Restore current context from top and clear it in debug mode.
-  ExternalReference context_address(Top::k_context_address);
-  mov(esi, Operand::StaticVariable(context_address));
-#ifdef DEBUG
-  mov(Operand::StaticVariable(context_address), Immediate(0));
-#endif
-
-  // Push the return address to get ready to return.
-  push(ecx);
-
-  // Clear the top frame.
-  ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address);
-  mov(Operand::StaticVariable(c_entry_fp_address), Immediate(0));
-}
-
-
-void MacroAssembler::PushTryHandler(CodeLocation try_location,
-                                    HandlerType type) {
-  ASSERT(StackHandlerConstants::kSize == 6 * kPointerSize);  // adjust this code
-  // The pc (return address) is already on TOS.
-  if (try_location == IN_JAVASCRIPT) {
-    if (type == TRY_CATCH_HANDLER) {
-      push(Immediate(StackHandler::TRY_CATCH));
-    } else {
-      push(Immediate(StackHandler::TRY_FINALLY));
-    }
-    push(Immediate(Smi::FromInt(StackHandler::kCodeNotPresent)));
-    push(ebp);
-    push(edi);
-  } else {
-    ASSERT(try_location == IN_JS_ENTRY);
-    // The parameter pointer is meaningless here and ebp does not
-    // point to a JS frame. So we save NULL for both pp and ebp. We
-    // expect the code throwing an exception to check ebp before
-    // dereferencing it to restore the context.
-    push(Immediate(StackHandler::ENTRY));
-    push(Immediate(Smi::FromInt(StackHandler::kCodeNotPresent)));
-    push(Immediate(0));  // NULL frame pointer
-    push(Immediate(0));  // NULL parameter pointer
-  }
-  // Cached TOS.
-  mov(eax, Operand::StaticVariable(ExternalReference(Top::k_handler_address)));
-  // Link this handler.
-  mov(Operand::StaticVariable(ExternalReference(Top::k_handler_address)), esp);
-}
-
-
-Register MacroAssembler::CheckMaps(JSObject* object, Register object_reg,
-                                   JSObject* holder, Register holder_reg,
-                                   Register scratch,
-                                   Label* miss) {
-  // Make sure there's no overlap between scratch and the other
-  // registers.
-  ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg));
-
-  // Keep track of the current object in register reg.
-  Register reg = object_reg;
-  int depth = 1;
-
-  // Check the maps in the prototype chain.
-  // Traverse the prototype chain from the object and do map checks.
-  while (object != holder) {
-    depth++;
-
-    // Only global objects and objects that do not require access
-    // checks are allowed in stubs.
-    ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
-
-    JSObject* prototype = JSObject::cast(object->GetPrototype());
-    if (Heap::InNewSpace(prototype)) {
-      // Get the map of the current object.
-      mov(scratch, FieldOperand(reg, HeapObject::kMapOffset));
-      cmp(Operand(scratch), Immediate(Handle<Map>(object->map())));
-      // Branch on the result of the map check.
-      j(not_equal, miss, not_taken);
-      // Check access rights to the global object.  This has to happen
-      // after the map check so that we know that the object is
-      // actually a global object.
-      if (object->IsJSGlobalProxy()) {
-        CheckAccessGlobalProxy(reg, scratch, miss);
-
-        // Restore scratch register to be the map of the object.
-        // We load the prototype from the map in the scratch register.
-        mov(scratch, FieldOperand(reg, HeapObject::kMapOffset));
-      }
-      // The prototype is in new space; we cannot store a reference
-      // to it in the code. Load it from the map.
-      reg = holder_reg;  // from now the object is in holder_reg
-      mov(reg, FieldOperand(scratch, Map::kPrototypeOffset));
-
-    } else {
-      // Check the map of the current object.
-      cmp(FieldOperand(reg, HeapObject::kMapOffset),
-          Immediate(Handle<Map>(object->map())));
-      // Branch on the result of the map check.
-      j(not_equal, miss, not_taken);
-      // Check access rights to the global object.  This has to happen
-      // after the map check so that we know that the object is
-      // actually a global object.
-      if (object->IsJSGlobalProxy()) {
-        CheckAccessGlobalProxy(reg, scratch, miss);
-      }
-      // The prototype is in old space; load it directly.
-      reg = holder_reg;  // from now the object is in holder_reg
-      mov(reg, Handle<JSObject>(prototype));
-    }
-
-    // Go to the next object in the prototype chain.
-    object = prototype;
-  }
-
-  // Check the holder map.
-  cmp(FieldOperand(reg, HeapObject::kMapOffset),
-      Immediate(Handle<Map>(holder->map())));
-  j(not_equal, miss, not_taken);
-
-  // Log the check depth.
-  LOG(IntEvent("check-maps-depth", depth));
-
-  // Perform security check for access to the global object and return
-  // the holder register.
-  ASSERT(object == holder);
-  ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
-  if (object->IsJSGlobalProxy()) {
-    CheckAccessGlobalProxy(reg, scratch, miss);
-  }
-  return reg;
-}
-
-
-void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
-                                          Register scratch,
-                                          Label* miss) {
-  Label same_contexts;
-
-  ASSERT(!holder_reg.is(scratch));
-
-  // Load current lexical context from the stack frame.
-  mov(scratch, Operand(ebp, StandardFrameConstants::kContextOffset));
-
-  // When generating debug code, make sure the lexical context is set.
-  if (FLAG_debug_code) {
-    cmp(Operand(scratch), Immediate(0));
-    Check(not_equal, "we should not have an empty lexical context");
-  }
-  // Load the global context of the current context.
-  int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
-  mov(scratch, FieldOperand(scratch, offset));
-  mov(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset));
-
-  // Check the context is a global context.
-  if (FLAG_debug_code) {
-    push(scratch);
-    // Read the first word and compare to global_context_map.
-    mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset));
-    cmp(scratch, Factory::global_context_map());
-    Check(equal, "JSGlobalObject::global_context should be a global context.");
-    pop(scratch);
-  }
-
-  // Check if both contexts are the same.
-  cmp(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset));
-  j(equal, &same_contexts, taken);
-
-  // Compare security tokens, save holder_reg on the stack so we can use it
-  // as a temporary register.
-  //
-  // TODO(119): avoid push(holder_reg)/pop(holder_reg)
-  push(holder_reg);
-  // Check that the security token in the calling global object is
-  // compatible with the security token in the receiving global
-  // object.
-  mov(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset));
-
-  // Check the context is a global context.
-  if (FLAG_debug_code) {
-    cmp(holder_reg, Factory::null_value());
-    Check(not_equal, "JSGlobalProxy::context() should not be null.");
-
-    push(holder_reg);
-    // Read the first word and compare to global_context_map(),
-    mov(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset));
-    cmp(holder_reg, Factory::global_context_map());
-    Check(equal, "JSGlobalObject::global_context should be a global context.");
-    pop(holder_reg);
-  }
-
-  int token_offset = Context::kHeaderSize +
-                     Context::SECURITY_TOKEN_INDEX * kPointerSize;
-  mov(scratch, FieldOperand(scratch, token_offset));
-  cmp(scratch, FieldOperand(holder_reg, token_offset));
-  pop(holder_reg);
-  j(not_equal, miss, not_taken);
-
-  bind(&same_contexts);
-}
-
-
-void MacroAssembler::NegativeZeroTest(CodeGenerator* cgen,
-                                      Register result,
-                                      Register op,
-                                      JumpTarget* then_target) {
-  JumpTarget ok(cgen);
-  test(result, Operand(result));
-  ok.Branch(not_zero, taken);
-  test(op, Operand(op));
-  then_target->Branch(sign, not_taken);
-  ok.Bind();
-}
-
-
-void MacroAssembler::NegativeZeroTest(Register result,
-                                      Register op,
-                                      Label* then_label) {
-  Label ok;
-  test(result, Operand(result));
-  j(not_zero, &ok, taken);
-  test(op, Operand(op));
-  j(sign, then_label, not_taken);
-  bind(&ok);
-}
-
-
-void MacroAssembler::NegativeZeroTest(Register result,
-                                      Register op1,
-                                      Register op2,
-                                      Register scratch,
-                                      Label* then_label) {
-  Label ok;
-  test(result, Operand(result));
-  j(not_zero, &ok, taken);
-  mov(scratch, Operand(op1));
-  or_(scratch, Operand(op2));
-  j(sign, then_label, not_taken);
-  bind(&ok);
-}
-
-
-void MacroAssembler::TryGetFunctionPrototype(Register function,
-                                             Register result,
-                                             Register scratch,
-                                             Label* miss) {
-  // Check that the receiver isn't a smi.
-  test(function, Immediate(kSmiTagMask));
-  j(zero, miss, not_taken);
-
-  // Check that the function really is a function.
-  CmpObjectType(function, JS_FUNCTION_TYPE, result);
-  j(not_equal, miss, not_taken);
-
-  // Make sure that the function has an instance prototype.
-  Label non_instance;
-  movzx_b(scratch, FieldOperand(result, Map::kBitFieldOffset));
-  test(scratch, Immediate(1 << Map::kHasNonInstancePrototype));
-  j(not_zero, &non_instance, not_taken);
-
-  // Get the prototype or initial map from the function.
-  mov(result,
-      FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
-
-  // If the prototype or initial map is the hole, don't return it and
-  // simply miss the cache instead. This will allow us to allocate a
-  // prototype object on-demand in the runtime system.
-  cmp(Operand(result), Immediate(Factory::the_hole_value()));
-  j(equal, miss, not_taken);
-
-  // If the function does not have an initial map, we're done.
-  Label done;
-  CmpObjectType(result, MAP_TYPE, scratch);
-  j(not_equal, &done);
-
-  // Get the prototype from the initial map.
-  mov(result, FieldOperand(result, Map::kPrototypeOffset));
-  jmp(&done);
-
-  // Non-instance prototype: Fetch prototype from constructor field
-  // in initial map.
-  bind(&non_instance);
-  mov(result, FieldOperand(result, Map::kConstructorOffset));
-
-  // All done.
-  bind(&done);
-}
-
-
-void MacroAssembler::CallStub(CodeStub* stub) {
-  ASSERT(allow_stub_calls());  // calls are not allowed in some stubs
-  call(stub->GetCode(), RelocInfo::CODE_TARGET);
-}
-
-
-void MacroAssembler::StubReturn(int argc) {
-  ASSERT(argc >= 1 && generating_stub());
-  ret((argc - 1) * kPointerSize);
-}
-
-
-void MacroAssembler::IllegalOperation(int num_arguments) {
-  if (num_arguments > 0) {
-    add(Operand(esp), Immediate(num_arguments * kPointerSize));
-  }
-  mov(eax, Immediate(Factory::undefined_value()));
-}
-
-
-void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) {
-  CallRuntime(Runtime::FunctionForId(id), num_arguments);
-}
-
-
-void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) {
-  // If the expected number of arguments of the runtime function is
-  // constant, we check that the actual number of arguments match the
-  // expectation.
-  if (f->nargs >= 0 && f->nargs != num_arguments) {
-    IllegalOperation(num_arguments);
-    return;
-  }
-
-  Runtime::FunctionId function_id =
-      static_cast<Runtime::FunctionId>(f->stub_id);
-  RuntimeStub stub(function_id, num_arguments);
-  CallStub(&stub);
-}
-
-
-void MacroAssembler::TailCallRuntime(const ExternalReference& ext,
-                                     int num_arguments) {
-  // TODO(1236192): Most runtime routines don't need the number of
-  // arguments passed in because it is constant. At some point we
-  // should remove this need and make the runtime routine entry code
-  // smarter.
-  Set(eax, Immediate(num_arguments));
-  JumpToBuiltin(ext);
-}
-
-
-void MacroAssembler::JumpToBuiltin(const ExternalReference& ext) {
-  // Set the entry point and jump to the C entry runtime stub.
-  mov(ebx, Immediate(ext));
-  CEntryStub ces;
-  jmp(ces.GetCode(), RelocInfo::CODE_TARGET);
-}
-
-
-void MacroAssembler::InvokePrologue(const ParameterCount& expected,
-                                    const ParameterCount& actual,
-                                    Handle<Code> code_constant,
-                                    const Operand& code_operand,
-                                    Label* done,
-                                    InvokeFlag flag) {
-  bool definitely_matches = false;
-  Label invoke;
-  if (expected.is_immediate()) {
-    ASSERT(actual.is_immediate());
-    if (expected.immediate() == actual.immediate()) {
-      definitely_matches = true;
-    } else {
-      mov(eax, actual.immediate());
-      const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel;
-      if (expected.immediate() == sentinel) {
-        // Don't worry about adapting arguments for builtins that
-        // don't want that done. Skip adaption code by making it look
-        // like we have a match between expected and actual number of
-        // arguments.
-        definitely_matches = true;
-      } else {
-        mov(ebx, expected.immediate());
-      }
-    }
-  } else {
-    if (actual.is_immediate()) {
-      // Expected is in register, actual is immediate. This is the
-      // case when we invoke function values without going through the
-      // IC mechanism.
-      cmp(expected.reg(), actual.immediate());
-      j(equal, &invoke);
-      ASSERT(expected.reg().is(ebx));
-      mov(eax, actual.immediate());
-    } else if (!expected.reg().is(actual.reg())) {
-      // Both expected and actual are in (different) registers. This
-      // is the case when we invoke functions using call and apply.
-      cmp(expected.reg(), Operand(actual.reg()));
-      j(equal, &invoke);
-      ASSERT(actual.reg().is(eax));
-      ASSERT(expected.reg().is(ebx));
-    }
-  }
-
-  if (!definitely_matches) {
-    Handle<Code> adaptor =
-        Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline));
-    if (!code_constant.is_null()) {
-      mov(edx, Immediate(code_constant));
-      add(Operand(edx), Immediate(Code::kHeaderSize - kHeapObjectTag));
-    } else if (!code_operand.is_reg(edx)) {
-      mov(edx, code_operand);
-    }
-
-    if (flag == CALL_FUNCTION) {
-      call(adaptor, RelocInfo::CODE_TARGET);
-      jmp(done);
-    } else {
-      jmp(adaptor, RelocInfo::CODE_TARGET);
-    }
-    bind(&invoke);
-  }
-}
-
-
-void MacroAssembler::InvokeCode(const Operand& code,
-                                const ParameterCount& expected,
-                                const ParameterCount& actual,
-                                InvokeFlag flag) {
-  Label done;
-  InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag);
-  if (flag == CALL_FUNCTION) {
-    call(code);
-  } else {
-    ASSERT(flag == JUMP_FUNCTION);
-    jmp(code);
-  }
-  bind(&done);
-}
-
-
-void MacroAssembler::InvokeCode(Handle<Code> code,
-                                const ParameterCount& expected,
-                                const ParameterCount& actual,
-                                RelocInfo::Mode rmode,
-                                InvokeFlag flag) {
-  Label done;
-  Operand dummy(eax);
-  InvokePrologue(expected, actual, code, dummy, &done, flag);
-  if (flag == CALL_FUNCTION) {
-    call(code, rmode);
-  } else {
-    ASSERT(flag == JUMP_FUNCTION);
-    jmp(code, rmode);
-  }
-  bind(&done);
-}
-
-
-void MacroAssembler::InvokeFunction(Register fun,
-                                    const ParameterCount& actual,
-                                    InvokeFlag flag) {
-  ASSERT(fun.is(edi));
-  mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
-  mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
-  mov(ebx, FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
-  mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
-  lea(edx, FieldOperand(edx, Code::kHeaderSize));
-
-  ParameterCount expected(ebx);
-  InvokeCode(Operand(edx), expected, actual, flag);
-}
-
-
-void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) {
-  bool resolved;
-  Handle<Code> code = ResolveBuiltin(id, &resolved);
-
-  // Calls are not allowed in some stubs.
-  ASSERT(flag == JUMP_FUNCTION || allow_stub_calls());
-
-  // Rely on the assertion to check that the number of provided
-  // arguments match the expected number of arguments. Fake a
-  // parameter count to avoid emitting code to do the check.
-  ParameterCount expected(0);
-  InvokeCode(Handle<Code>(code), expected, expected,
-             RelocInfo::CODE_TARGET, flag);
-
-  const char* name = Builtins::GetName(id);
-  int argc = Builtins::GetArgumentsCount(id);
-
-  if (!resolved) {
-    uint32_t flags =
-        Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(true) |
-        Bootstrapper::FixupFlagsUseCodeObject::encode(false);
-    Unresolved entry = { pc_offset() - sizeof(int32_t), flags, name };
-    unresolved_.Add(entry);
-  }
-}
-
-
-void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) {
-  bool resolved;
-  Handle<Code> code = ResolveBuiltin(id, &resolved);
-
-  const char* name = Builtins::GetName(id);
-  int argc = Builtins::GetArgumentsCount(id);
-
-  mov(Operand(target), Immediate(code));
-  if (!resolved) {
-    uint32_t flags =
-        Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(false) |
-        Bootstrapper::FixupFlagsUseCodeObject::encode(true);
-    Unresolved entry = { pc_offset() - sizeof(int32_t), flags, name };
-    unresolved_.Add(entry);
-  }
-  add(Operand(target), Immediate(Code::kHeaderSize - kHeapObjectTag));
-}
-
-
-Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id,
-                                            bool* resolved) {
-  // Move the builtin function into the temporary function slot by
-  // reading it from the builtins object. NOTE: We should be able to
-  // reduce this to two instructions by putting the function table in
-  // the global object instead of the "builtins" object and by using a
-  // real register for the function.
-  mov(edx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
-  mov(edx, FieldOperand(edx, GlobalObject::kBuiltinsOffset));
-  int builtins_offset =
-      JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize);
-  mov(edi, FieldOperand(edx, builtins_offset));
-
-
-  return Builtins::GetCode(id, resolved);
-}
-
-
-void MacroAssembler::Ret() {
-  ret(0);
-}
-
-
-void MacroAssembler::SetCounter(StatsCounter* counter, int value) {
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    mov(Operand::StaticVariable(ExternalReference(counter)), Immediate(value));
-  }
-}
-
-
-void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) {
-  ASSERT(value > 0);
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    Operand operand = Operand::StaticVariable(ExternalReference(counter));
-    if (value == 1) {
-      inc(operand);
-    } else {
-      add(operand, Immediate(value));
-    }
-  }
-}
-
-
-void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) {
-  ASSERT(value > 0);
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    Operand operand = Operand::StaticVariable(ExternalReference(counter));
-    if (value == 1) {
-      dec(operand);
-    } else {
-      sub(operand, Immediate(value));
-    }
-  }
-}
-
-
-void MacroAssembler::Assert(Condition cc, const char* msg) {
-  if (FLAG_debug_code) Check(cc, msg);
-}
-
-
-void MacroAssembler::Check(Condition cc, const char* msg) {
-  Label L;
-  j(cc, &L, taken);
-  Abort(msg);
-  // will not return here
-  bind(&L);
-}
-
-
-void MacroAssembler::Abort(const char* msg) {
-  // We want to pass the msg string like a smi to avoid GC
-  // problems, however msg is not guaranteed to be aligned
-  // properly. Instead, we pass an aligned pointer that is
-  // a proper v8 smi, but also pass the alignment difference
-  // from the real pointer as a smi.
-  intptr_t p1 = reinterpret_cast<intptr_t>(msg);
-  intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag;
-  ASSERT(reinterpret_cast<Object*>(p0)->IsSmi());
-#ifdef DEBUG
-  if (msg != NULL) {
-    RecordComment("Abort message: ");
-    RecordComment(msg);
-  }
-#endif
-  push(eax);
-  push(Immediate(p0));
-  push(Immediate(reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0))));
-  CallRuntime(Runtime::kAbort, 2);
-  // will not return here
-}
-
-
-CodePatcher::CodePatcher(byte* address, int size)
-  : address_(address), size_(size), masm_(address, size + Assembler::kGap) {
-  // Create a new macro assembler pointing to the address of the code to patch.
-  // The size is adjusted with kGap on order for the assembler to generate size
-  // bytes of instructions without failing with buffer size constraints.
-  ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
-}
-
-
-CodePatcher::~CodePatcher() {
-  // Indicate that code has changed.
-  CPU::FlushICache(address_, size_);
-
-  // Check that the code was patched as expected.
-  ASSERT(masm_.pc_ == address_ + size_);
-  ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
-}
-
-
-} }  // namespace v8::internal