Move backend specific files to separate directories.

src/macro-assembler-arm.cc

Index: src/macro-assembler-arm.cc
diff --git a/src/macro-assembler-arm.cc b/src/macro-assembler-arm.cc
deleted file mode 100644
index 365c1ad7f2e305cc0bd880eeb46bd9b4ffbc2edb..0000000000000000000000000000000000000000
--- a/src/macro-assembler-arm.cc
+++ /dev/null
@@ -1,941 +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"
-
-namespace v8 { namespace internal {
-
-// Give alias names to registers
-Register cp = {  8 };  // JavaScript context pointer
-Register pp = { 10 };  // parameter pointer
-
-
-MacroAssembler::MacroAssembler(void* buffer, int size)
-    : Assembler(buffer, size),
-      unresolved_(0),
-      generating_stub_(false),
-      allow_stub_calls_(true),
-      code_object_(Heap::undefined_value()) {
-}
-
-
-// We always generate arm code, never thumb code, even if V8 is compiled to
-// thumb, so we require inter-working support
-#if defined(__thumb__) && !defined(__THUMB_INTERWORK__)
-#error "flag -mthumb-interwork missing"
-#endif
-
-
-// We do not support thumb inter-working with an arm architecture not supporting
-// the blx instruction (below v5t)
-#if defined(__THUMB_INTERWORK__)
-#if !defined(__ARM_ARCH_5T__) && !defined(__ARM_ARCH_5TE__)
-// add tests for other versions above v5t as required
-#error "for thumb inter-working we require architecture v5t or above"
-#endif
-#endif
-
-
-// Using blx may yield better code, so use it when required or when available
-#if defined(__THUMB_INTERWORK__) || defined(__ARM_ARCH_5__)
-#define USE_BLX 1
-#endif
-
-// Using bx does not yield better code, so use it only when required
-#if defined(__THUMB_INTERWORK__)
-#define USE_BX 1
-#endif
-
-
-void MacroAssembler::Jump(Register target, Condition cond) {
-#if USE_BX
-  bx(target, cond);
-#else
-  mov(pc, Operand(target), LeaveCC, cond);
-#endif
-}
-
-
-void MacroAssembler::Jump(intptr_t target, RelocInfo::Mode rmode,
-                          Condition cond) {
-#if USE_BX
-  mov(ip, Operand(target, rmode), LeaveCC, cond);
-  bx(ip, cond);
-#else
-  mov(pc, Operand(target, rmode), LeaveCC, cond);
-#endif
-}
-
-
-void MacroAssembler::Jump(byte* target, RelocInfo::Mode rmode,
-                          Condition cond) {
-  ASSERT(!RelocInfo::IsCodeTarget(rmode));
-  Jump(reinterpret_cast<intptr_t>(target), rmode, cond);
-}
-
-
-void MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode,
-                          Condition cond) {
-  ASSERT(RelocInfo::IsCodeTarget(rmode));
-  // 'code' is always generated ARM code, never THUMB code
-  Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond);
-}
-
-
-void MacroAssembler::Call(Register target, Condition cond) {
-#if USE_BLX
-  blx(target, cond);
-#else
-  // set lr for return at current pc + 8
-  mov(lr, Operand(pc), LeaveCC, cond);
-  mov(pc, Operand(target), LeaveCC, cond);
-#endif
-}
-
-
-void MacroAssembler::Call(intptr_t target, RelocInfo::Mode rmode,
-                          Condition cond) {
-#if !defined(__arm__)
-  if (rmode == RelocInfo::RUNTIME_ENTRY) {
-    mov(r2, Operand(target, rmode), LeaveCC, cond);
-    // Set lr for return at current pc + 8.
-    mov(lr, Operand(pc), LeaveCC, cond);
-    // Emit a ldr<cond> pc, [pc + offset of target in constant pool].
-    // Notify the simulator of the transition to C code.
-    swi(assembler::arm::call_rt_r2);
-  } else {
-    // set lr for return at current pc + 8
-    mov(lr, Operand(pc), LeaveCC, cond);
-    // emit a ldr<cond> pc, [pc + offset of target in constant pool]
-    mov(pc, Operand(target, rmode), LeaveCC, cond);
-  }
-#else
-  // Set lr for return at current pc + 8.
-  mov(lr, Operand(pc), LeaveCC, cond);
-  // Emit a ldr<cond> pc, [pc + offset of target in constant pool].
-  mov(pc, Operand(target, rmode), LeaveCC, cond);
-#endif  // !defined(__arm__)
-  // If USE_BLX is defined, we could emit a 'mov ip, target', followed by a
-  // 'blx ip'; however, the code would not be shorter than the above sequence
-  // and the target address of the call would be referenced by the first
-  // instruction rather than the second one, which would make it harder to patch
-  // (two instructions before the return address, instead of one).
-  ASSERT(kTargetAddrToReturnAddrDist == sizeof(Instr));
-}
-
-
-void MacroAssembler::Call(byte* target, RelocInfo::Mode rmode,
-                          Condition cond) {
-  ASSERT(!RelocInfo::IsCodeTarget(rmode));
-  Call(reinterpret_cast<intptr_t>(target), rmode, cond);
-}
-
-
-void MacroAssembler::Call(Handle<Code> code, RelocInfo::Mode rmode,
-                          Condition cond) {
-  ASSERT(RelocInfo::IsCodeTarget(rmode));
-  // 'code' is always generated ARM code, never THUMB code
-  Call(reinterpret_cast<intptr_t>(code.location()), rmode, cond);
-}
-
-
-void MacroAssembler::Ret(Condition cond) {
-#if USE_BX
-  bx(lr, cond);
-#else
-  mov(pc, Operand(lr), LeaveCC, cond);
-#endif
-}
-
-
-void MacroAssembler::SmiJumpTable(Register index, Vector<Label*> targets) {
-  // Empty the const pool.
-  CheckConstPool(true, true);
-  add(pc, pc, Operand(index,
-                      LSL,
-                      assembler::arm::Instr::kInstrSizeLog2 - kSmiTagSize));
-  BlockConstPoolBefore(pc_offset() + (targets.length() + 1) * sizeof(Instr));
-  nop();  // Jump table alignment.
-  for (int i = 0; i < targets.length(); i++) {
-    b(targets[i]);
-  }
-}
-
-
-// Will clobber 4 registers: object, offset, scratch, ip.  The
-// register 'object' contains a heap object pointer.  The heap object
-// tag is shifted away.
-void MacroAssembler::RecordWrite(Register object, Register offset,
-                                 Register scratch) {
-  // This is how much we shift the remembered set bit offset to get the
-  // offset of the word in the remembered set.  We divide by kBitsPerInt (32,
-  // shift right 5) and then multiply by kIntSize (4, shift left 2).
-  const int kRSetWordShift = 3;
-
-  Label fast, done;
-
-  // First, test that the object is not in the new space.  We cannot set
-  // remembered set bits in the new space.
-  // object: heap object pointer (with tag)
-  // offset: offset to store location from the object
-  and_(scratch, object, Operand(Heap::NewSpaceMask()));
-  cmp(scratch, Operand(ExternalReference::new_space_start()));
-  b(eq, &done);
-
-  // Compute the bit offset in the remembered set.
-  // object: heap object pointer (with tag)
-  // offset: offset to store location from the object
-  mov(ip, Operand(Page::kPageAlignmentMask));  // load mask only once
-  and_(scratch, object, Operand(ip));  // offset into page of the object
-  add(offset, scratch, Operand(offset));  // add offset into the object
-  mov(offset, Operand(offset, LSR, kObjectAlignmentBits));
-
-  // Compute the page address from the heap object pointer.
-  // object: heap object pointer (with tag)
-  // offset: bit offset of store position in the remembered set
-  bic(object, object, Operand(ip));
-
-  // If the bit offset lies beyond the normal remembered set range, it is in
-  // the extra remembered set area of a large object.
-  // object: page start
-  // offset: bit offset of store position in the remembered set
-  cmp(offset, Operand(Page::kPageSize / kPointerSize));
-  b(lt, &fast);
-
-  // Adjust the bit offset to be relative to the start of the extra
-  // remembered set and the start address to be the address of the extra
-  // remembered set.
-  sub(offset, offset, Operand(Page::kPageSize / kPointerSize));
-  // Load the array length into 'scratch' and multiply by four to get the
-  // size in bytes of the elements.
-  ldr(scratch, MemOperand(object, Page::kObjectStartOffset
-                                  + FixedArray::kLengthOffset));
-  mov(scratch, Operand(scratch, LSL, kObjectAlignmentBits));
-  // Add the page header (including remembered set), array header, and array
-  // body size to the page address.
-  add(object, object, Operand(Page::kObjectStartOffset
-                              + Array::kHeaderSize));
-  add(object, object, Operand(scratch));
-
-  bind(&fast);
-  // Get address of the rset word.
-  // object: start of the remembered set (page start for the fast case)
-  // offset: bit offset of store position in the remembered set
-  bic(scratch, offset, Operand(kBitsPerInt - 1));  // clear the bit offset
-  add(object, object, Operand(scratch, LSR, kRSetWordShift));
-  // Get bit offset in the rset word.
-  // object: address of remembered set word
-  // offset: bit offset of store position
-  and_(offset, offset, Operand(kBitsPerInt - 1));
-
-  ldr(scratch, MemOperand(object));
-  mov(ip, Operand(1));
-  orr(scratch, scratch, Operand(ip, LSL, offset));
-  str(scratch, MemOperand(object));
-
-  bind(&done);
-}
-
-
-void MacroAssembler::EnterFrame(StackFrame::Type type) {
-  // r0-r3: preserved
-  stm(db_w, sp, cp.bit() | fp.bit() | lr.bit());
-  mov(ip, Operand(Smi::FromInt(type)));
-  push(ip);
-  mov(ip, Operand(CodeObject()));
-  push(ip);
-  add(fp, sp, Operand(3 * kPointerSize));  // Adjust FP to point to saved FP.
-}
-
-
-void MacroAssembler::LeaveFrame(StackFrame::Type type) {
-  // r0: preserved
-  // r1: preserved
-  // r2: preserved
-
-  // Drop the execution stack down to the frame pointer and restore
-  // the caller frame pointer and return address.
-  mov(sp, fp);
-  ldm(ia_w, sp, fp.bit() | lr.bit());
-}
-
-
-void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
-  ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG);
-  // Compute parameter pointer before making changes and save it as ip
-  // register so that it is restored as sp register on exit, thereby
-  // popping the args.
-
-  // ip = sp + kPointerSize * #args;
-  add(ip, sp, Operand(r0, LSL, kPointerSizeLog2));
-
-  // Push in reverse order: caller_fp, sp_on_exit, and caller_pc.
-  stm(db_w, sp, fp.bit() | ip.bit() | lr.bit());
-  mov(fp, Operand(sp));  // setup new frame pointer
-
-  // Push debug marker.
-  mov(ip, Operand(type == StackFrame::EXIT_DEBUG ? 1 : 0));
-  push(ip);
-
-  // Save the frame pointer and the context in top.
-  mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address)));
-  str(fp, MemOperand(ip));
-  mov(ip, Operand(ExternalReference(Top::k_context_address)));
-  str(cp, MemOperand(ip));
-
-  // Setup argc and the builtin function in callee-saved registers.
-  mov(r4, Operand(r0));
-  mov(r5, Operand(r1));
-
-  // Compute the argv pointer and keep it in a callee-saved register.
-  add(r6, fp, Operand(r4, LSL, kPointerSizeLog2));
-  add(r6, r6, Operand(ExitFrameConstants::kPPDisplacement - kPointerSize));
-
-#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) {
-    // Use sp as base to push.
-    CopyRegistersFromMemoryToStack(sp, kJSCallerSaved);
-  }
-#endif
-}
-
-
-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) {
-    // This code intentionally clobbers r2 and r3.
-    const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize;
-    const int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize;
-    add(r3, fp, Operand(kOffset));
-    CopyRegistersFromStackToMemory(r3, r2, kJSCallerSaved);
-  }
-#endif
-
-  // Clear top frame.
-  mov(r3, Operand(0));
-  mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address)));
-  str(r3, MemOperand(ip));
-
-  // Restore current context from top and clear it in debug mode.
-  mov(ip, Operand(ExternalReference(Top::k_context_address)));
-  ldr(cp, MemOperand(ip));
-#ifdef DEBUG
-  str(r3, MemOperand(ip));
-#endif
-
-  // Pop the arguments, restore registers, and return.
-  mov(sp, Operand(fp));  // respect ABI stack constraint
-  ldm(ia, sp, fp.bit() | sp.bit() | pc.bit());
-}
-
-
-void MacroAssembler::InvokePrologue(const ParameterCount& expected,
-                                    const ParameterCount& actual,
-                                    Handle<Code> code_constant,
-                                    Register code_reg,
-                                    Label* done,
-                                    InvokeFlag flag) {
-  bool definitely_matches = false;
-  Label regular_invoke;
-
-  // Check whether the expected and actual arguments count match. If not,
-  // setup registers according to contract with ArgumentsAdaptorTrampoline:
-  //  r0: actual arguments count
-  //  r1: function (passed through to callee)
-  //  r2: expected arguments count
-  //  r3: callee code entry
-
-  // The code below is made a lot easier because the calling code already sets
-  // up actual and expected registers according to the contract if values are
-  // passed in registers.
-  ASSERT(actual.is_immediate() || actual.reg().is(r0));
-  ASSERT(expected.is_immediate() || expected.reg().is(r2));
-  ASSERT((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(r3));
-
-  if (expected.is_immediate()) {
-    ASSERT(actual.is_immediate());
-    if (expected.immediate() == actual.immediate()) {
-      definitely_matches = true;
-    } else {
-      mov(r0, Operand(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(r2, Operand(expected.immediate()));
-      }
-    }
-  } else {
-    if (actual.is_immediate()) {
-      cmp(expected.reg(), Operand(actual.immediate()));
-      b(eq, &regular_invoke);
-      mov(r0, Operand(actual.immediate()));
-    } else {
-      cmp(expected.reg(), Operand(actual.reg()));
-      b(eq, &regular_invoke);
-    }
-  }
-
-  if (!definitely_matches) {
-    if (!code_constant.is_null()) {
-      mov(r3, Operand(code_constant));
-      add(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag));
-    }
-
-    Handle<Code> adaptor =
-        Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline));
-    if (flag == CALL_FUNCTION) {
-      Call(adaptor, RelocInfo::CODE_TARGET);
-      b(done);
-    } else {
-      Jump(adaptor, RelocInfo::CODE_TARGET);
-    }
-    bind(&regular_invoke);
-  }
-}
-
-
-void MacroAssembler::InvokeCode(Register 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);
-    Jump(code);
-  }
-
-  // Continue here if InvokePrologue does handle the invocation due to
-  // mismatched parameter counts.
-  bind(&done);
-}
-
-
-void MacroAssembler::InvokeCode(Handle<Code> code,
-                                const ParameterCount& expected,
-                                const ParameterCount& actual,
-                                RelocInfo::Mode rmode,
-                                InvokeFlag flag) {
-  Label done;
-
-  InvokePrologue(expected, actual, code, no_reg, &done, flag);
-  if (flag == CALL_FUNCTION) {
-    Call(code, rmode);
-  } else {
-    Jump(code, rmode);
-  }
-
-  // Continue here if InvokePrologue does handle the invocation due to
-  // mismatched parameter counts.
-  bind(&done);
-}
-
-
-void MacroAssembler::InvokeFunction(Register fun,
-                                    const ParameterCount& actual,
-                                    InvokeFlag flag) {
-  // Contract with called JS functions requires that function is passed in r1.
-  ASSERT(fun.is(r1));
-
-  Register expected_reg = r2;
-  Register code_reg = r3;
-
-  ldr(code_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
-  ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
-  ldr(expected_reg,
-      FieldMemOperand(code_reg,
-                      SharedFunctionInfo::kFormalParameterCountOffset));
-  ldr(code_reg,
-      MemOperand(code_reg, SharedFunctionInfo::kCodeOffset - kHeapObjectTag));
-  add(code_reg, code_reg, Operand(Code::kHeaderSize - kHeapObjectTag));
-
-  ParameterCount expected(expected_reg);
-  InvokeCode(code_reg, expected, actual, flag);
-}
-
-
-#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 };
-      mov(ip, Operand(ExternalReference(Debug_Address::Register(i))));
-      str(reg, MemOperand(ip));
-    }
-  }
-}
-
-
-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 };
-      mov(ip, Operand(ExternalReference(Debug_Address::Register(i))));
-      ldr(reg, MemOperand(ip));
-    }
-  }
-}
-
-
-void MacroAssembler::CopyRegistersFromMemoryToStack(Register base,
-                                                    RegList regs) {
-  ASSERT((regs & ~kJSCallerSaved) == 0);
-  // Copy the content of the memory location to the stack and adjust base.
-  for (int i = kNumJSCallerSaved; --i >= 0;) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      mov(ip, Operand(ExternalReference(Debug_Address::Register(i))));
-      ldr(ip, MemOperand(ip));
-      str(ip, MemOperand(base, 4, NegPreIndex));
-    }
-  }
-}
-
-
-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 = 0; i < kNumJSCallerSaved; i++) {
-    int r = JSCallerSavedCode(i);
-    if ((regs & (1 << r)) != 0) {
-      mov(ip, Operand(ExternalReference(Debug_Address::Register(i))));
-      ldr(scratch, MemOperand(base, 4, PostIndex));
-      str(scratch, MemOperand(ip));
-    }
-  }
-}
-#endif
-
-void MacroAssembler::PushTryHandler(CodeLocation try_location,
-                                    HandlerType type) {
-  ASSERT(StackHandlerConstants::kSize == 6 * kPointerSize);  // adjust this code
-  // The pc (return address) is passed in register lr.
-  if (try_location == IN_JAVASCRIPT) {
-    stm(db_w, sp, pp.bit() | fp.bit() | lr.bit());
-    if (type == TRY_CATCH_HANDLER) {
-      mov(r3, Operand(StackHandler::TRY_CATCH));
-    } else {
-      mov(r3, Operand(StackHandler::TRY_FINALLY));
-    }
-    push(r3);  // state
-    mov(r3, Operand(ExternalReference(Top::k_handler_address)));
-    ldr(r1, MemOperand(r3));
-    push(r1);  // next sp
-    str(sp, MemOperand(r3));  // chain handler
-    mov(r0, Operand(Smi::FromInt(StackHandler::kCodeNotPresent)));  // new TOS
-    push(r0);
-  } else {
-    // Must preserve r0-r4, r5-r7 are available.
-    ASSERT(try_location == IN_JS_ENTRY);
-    // The parameter pointer is meaningless here and fp does not point to a JS
-    // frame. So we save NULL for both pp and fp. We expect the code throwing an
-    // exception to check fp before dereferencing it to restore the context.
-    mov(pp, Operand(0));  // set pp to NULL
-    mov(ip, Operand(0));  // to save a NULL fp
-    stm(db_w, sp, pp.bit() | ip.bit() | lr.bit());
-    mov(r6, Operand(StackHandler::ENTRY));
-    push(r6);  // state
-    mov(r7, Operand(ExternalReference(Top::k_handler_address)));
-    ldr(r6, MemOperand(r7));
-    push(r6);  // next sp
-    str(sp, MemOperand(r7));  // chain handler
-    mov(r5, Operand(Smi::FromInt(StackHandler::kCodeNotPresent)));  // new TOS
-    push(r5);  // flush TOS
-  }
-}
-
-
-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());
-
-    // Get the map of the current object.
-    ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-    cmp(scratch, Operand(Handle<Map>(object->map())));
-
-    // Branch on the result of the map check.
-    b(ne, miss);
-
-    // 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.  In the
-      // new space case below, we load the prototype from the map in
-      // the scratch register.
-      ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-    }
-
-    reg = holder_reg;  // from now the object is in holder_reg
-    JSObject* prototype = JSObject::cast(object->GetPrototype());
-    if (Heap::InNewSpace(prototype)) {
-      // The prototype is in new space; we cannot store a reference
-      // to it in the code. Load it from the map.
-      ldr(reg, FieldMemOperand(scratch, Map::kPrototypeOffset));
-    } else {
-      // The prototype is in old space; load it directly.
-      mov(reg, Operand(Handle<JSObject>(prototype)));
-    }
-
-    // Go to the next object in the prototype chain.
-    object = prototype;
-  }
-
-  // Check the holder map.
-  ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-  cmp(scratch, Operand(Handle<Map>(object->map())));
-  b(ne, miss);
-
-  // 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));
-  ASSERT(!holder_reg.is(ip));
-  ASSERT(!scratch.is(ip));
-
-  // Load current lexical context from the stack frame.
-  ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset));
-  // In debug mode, make sure the lexical context is set.
-#ifdef DEBUG
-  cmp(scratch, Operand(0));
-  Check(ne, "we should not have an empty lexical context");
-#endif
-
-  // Load the global context of the current context.
-  int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
-  ldr(scratch, FieldMemOperand(scratch, offset));
-  ldr(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset));
-
-  // Check the context is a global context.
-  if (FLAG_debug_code) {
-    // TODO(119): avoid push(holder_reg)/pop(holder_reg)
-    // Cannot use ip as a temporary in this verification code. Due to the fact
-    // that ip is clobbered as part of cmp with an object Operand.
-    push(holder_reg);  // Temporarily save holder on the stack.
-    // Read the first word and compare to the global_context_map.
-    ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset));
-    cmp(holder_reg, Operand(Factory::global_context_map()));
-    Check(eq, "JSGlobalObject::global_context should be a global context.");
-    pop(holder_reg);  // Restore holder.
-  }
-
-  // Check if both contexts are the same.
-  ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset));
-  cmp(scratch, Operand(ip));
-  b(eq, &same_contexts);
-
-  // Check the context is a global context.
-  if (FLAG_debug_code) {
-    // TODO(119): avoid push(holder_reg)/pop(holder_reg)
-    // Cannot use ip as a temporary in this verification code. Due to the fact
-    // that ip is clobbered as part of cmp with an object Operand.
-    push(holder_reg);  // Temporarily save holder on the stack.
-    mov(holder_reg, ip);  // Move ip to its holding place.
-    cmp(holder_reg, Operand(Factory::null_value()));
-    Check(ne, "JSGlobalProxy::context() should not be null.");
-
-    ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset));
-    cmp(holder_reg, Operand(Factory::global_context_map()));
-    Check(eq, "JSGlobalObject::global_context should be a global context.");
-    // Restore ip is not needed. ip is reloaded below.
-    pop(holder_reg);  // Restore holder.
-    // Restore ip to holder's context.
-    ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset));
-  }
-
-  // Check that the security token in the calling global object is
-  // compatible with the security token in the receiving global
-  // object.
-  int token_offset = Context::kHeaderSize +
-                     Context::SECURITY_TOKEN_INDEX * kPointerSize;
-
-  ldr(scratch, FieldMemOperand(scratch, token_offset));
-  ldr(ip, FieldMemOperand(ip, token_offset));
-  cmp(scratch, Operand(ip));
-  b(ne, miss);
-
-  bind(&same_contexts);
-}
-
-
-void MacroAssembler::CallStub(CodeStub* stub) {
-  ASSERT(allow_stub_calls());  // stub calls are not allowed in some stubs
-  Call(stub->GetCode(), RelocInfo::CODE_TARGET);
-}
-
-
-void MacroAssembler::StubReturn(int argc) {
-  ASSERT(argc >= 1 && generating_stub());
-  if (argc > 1)
-    add(sp, sp, Operand((argc - 1) * kPointerSize));
-  Ret();
-}
-
-
-void MacroAssembler::IllegalOperation(int num_arguments) {
-  if (num_arguments > 0) {
-    add(sp, sp, Operand(num_arguments * kPointerSize));
-  }
-  mov(r0, Operand(Factory::undefined_value()));
-}
-
-
-void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) {
-  // All parameters are on the stack.  r0 has the return value after call.
-
-  // 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::CallRuntime(Runtime::FunctionId fid, int num_arguments) {
-  CallRuntime(Runtime::FunctionForId(fid), num_arguments);
-}
-
-
-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.
-  mov(r0, Operand(num_arguments));
-  JumpToBuiltin(ext);
-}
-
-
-void MacroAssembler::JumpToBuiltin(const ExternalReference& builtin) {
-#if defined(__thumb__)
-  // Thumb mode builtin.
-  ASSERT((reinterpret_cast<intptr_t>(builtin.address()) & 1) == 1);
-#endif
-  mov(r1, Operand(builtin));
-  CEntryStub stub;
-  Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
-}
-
-
-Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id,
-                                            bool* resolved) {
-  // Contract with compiled functions is that the function is passed in r1.
-  int builtins_offset =
-      JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize);
-  ldr(r1, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
-  ldr(r1, FieldMemOperand(r1, GlobalObject::kBuiltinsOffset));
-  ldr(r1, FieldMemOperand(r1, builtins_offset));
-
-  return Builtins::GetCode(id, resolved);
-}
-
-
-void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id,
-                                   InvokeJSFlags flags) {
-  bool resolved;
-  Handle<Code> code = ResolveBuiltin(id, &resolved);
-
-  if (flags == CALL_JS) {
-    Call(code, RelocInfo::CODE_TARGET);
-  } else {
-    ASSERT(flags == JUMP_JS);
-    Jump(code, RelocInfo::CODE_TARGET);
-  }
-
-  if (!resolved) {
-    const char* name = Builtins::GetName(id);
-    int argc = Builtins::GetArgumentsCount(id);
-    uint32_t flags =
-        Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(true) |
-        Bootstrapper::FixupFlagsUseCodeObject::encode(false);
-    Unresolved entry = { pc_offset() - sizeof(Instr), flags, name };
-    unresolved_.Add(entry);
-  }
-}
-
-
-void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) {
-  bool resolved;
-  Handle<Code> code = ResolveBuiltin(id, &resolved);
-
-  mov(target, Operand(code));
-  if (!resolved) {
-    const char* name = Builtins::GetName(id);
-    int argc = Builtins::GetArgumentsCount(id);
-    uint32_t flags =
-        Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(true) |
-        Bootstrapper::FixupFlagsUseCodeObject::encode(true);
-    Unresolved entry = { pc_offset() - sizeof(Instr), flags, name };
-    unresolved_.Add(entry);
-  }
-
-  add(target, target, Operand(Code::kHeaderSize - kHeapObjectTag));
-}
-
-
-void MacroAssembler::SetCounter(StatsCounter* counter, int value,
-                                Register scratch1, Register scratch2) {
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    mov(scratch1, Operand(value));
-    mov(scratch2, Operand(ExternalReference(counter)));
-    str(scratch1, MemOperand(scratch2));
-  }
-}
-
-
-void MacroAssembler::IncrementCounter(StatsCounter* counter, int value,
-                                      Register scratch1, Register scratch2) {
-  ASSERT(value > 0);
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    mov(scratch2, Operand(ExternalReference(counter)));
-    ldr(scratch1, MemOperand(scratch2));
-    add(scratch1, scratch1, Operand(value));
-    str(scratch1, MemOperand(scratch2));
-  }
-}
-
-
-void MacroAssembler::DecrementCounter(StatsCounter* counter, int value,
-                                      Register scratch1, Register scratch2) {
-  ASSERT(value > 0);
-  if (FLAG_native_code_counters && counter->Enabled()) {
-    mov(scratch2, Operand(ExternalReference(counter)));
-    ldr(scratch1, MemOperand(scratch2));
-    sub(scratch1, scratch1, Operand(value));
-    str(scratch1, MemOperand(scratch2));
-  }
-}
-
-
-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;
-  b(cc, &L);
-  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
-  mov(r0, Operand(p0));
-  push(r0);
-  mov(r0, Operand(Smi::FromInt(p1 - p0)));
-  push(r0);
-  CallRuntime(Runtime::kAbort, 2);
-  // will not return here
-}
-
-} }  // namespace v8::internal