Now that the macro-assembler functions are not templatized on

src/ia32/macro-assembler-ia32-inl.h

-// Copyright 2011 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.
-
-#ifndef V8_IA32_MACRO_ASSEMBLER_IA32_INL_H_
-#define V8_IA32_MACRO_ASSEMBLER_IA32_INL_H_
-
-#include "macro-assembler.h"
-
-namespace v8 {
-namespace internal {
-
-void MacroAssembler::CheckPageFlag(
-    Register object,
-    Register scratch,
-    MemoryChunk::MemoryChunkFlags flag,
-    Condition cc,
-    Label* condition_met,
-    Label::Distance condition_met_near) {
-  ASSERT(cc == zero || cc == not_zero);
-  if (scratch.is(object)) {
-    and_(scratch, Immediate(~Page::kPageAlignmentMask));
-  } else {
-    mov(scratch, Immediate(~Page::kPageAlignmentMask));
-    and_(scratch, Operand(object));
-  }
-  if (flag < kBitsPerByte) {
-    test_b(Operand(scratch, MemoryChunk::kFlagsOffset),
-           static_cast<uint8_t>(1u << flag));
-  } else {
-    test(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(1 << flag));
-  }
-  j(cc, condition_met, condition_met_near);
-}
-
-
-void MacroAssembler::IsBlack(Register object,
-                             Register scratch0,
-                             Register scratch1,
-                             Label* is_black,
-                             Label::Distance is_black_near) {
-  HasColour(object, scratch0, scratch1,
-            is_black, is_black_near,
-            1, 0);  // kBlackBitPattern.
-  ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
-}
-
-
-void MacroAssembler::HasColour(Register object,
-                               Register bitmap_scratch,
-                               Register mask_scratch,
-                               Label* has_colour,
-                               Label::Distance has_colour_distance,
-                               int first_bit,
-                               int second_bit) {
-  ASSERT(!Aliasing(object, bitmap_scratch, mask_scratch, ecx));
-
-  MarkBits(object, bitmap_scratch, mask_scratch);
-
-  Label other_colour, word_boundary;
-  test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize));
-  j(first_bit == 1 ? zero : not_zero, &other_colour, Label::kNear);
-  add(mask_scratch, Operand(mask_scratch));  // Shift left 1 by adding.
-  j(zero, &word_boundary, Label::kNear);
-  test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize));
-  j(second_bit == 1 ? not_zero : zero, has_colour, has_colour_distance);
-  jmp(&other_colour, Label::kNear);
-
-  bind(&word_boundary);
-  test_b(Operand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize), 1);
-
-  j(second_bit == 1 ? not_zero : zero, has_colour, has_colour_distance);
-  bind(&other_colour);
-}
-
-
-void MacroAssembler::IsDataObject(Register value,
-                                  Register scratch,
-                                  Label* not_data_object,
-                                  Label::Distance not_data_object_distance,
-                                  bool in_new_space) {
-  if (in_new_space) {
-    Label is_data_object;
-    mov(scratch, FieldOperand(value, HeapObject::kMapOffset));
-    cmp(scratch, FACTORY->heap_number_map());
-    j(equal, &is_data_object, Label::kNear);
-    ASSERT(kConsStringTag == 1 && kIsConsStringMask == 1);
-    ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80);
-    // If it's a string and it's not a cons string then it's an object that
-    // doesn't need scanning.
-    test_b(FieldOperand(scratch, Map::kInstanceTypeOffset),
-           kIsConsStringMask | kIsNotStringMask);
-    // Jump if we need to mark it grey and push it.
-    j(not_zero, not_data_object, not_data_object_distance);
-    bind(&is_data_object);
-  } else {
-    mov(scratch, Operand(value));
-    and_(scratch, ~Page::kPageAlignmentMask);
-    test_b(Operand(scratch, MemoryChunk::kFlagsOffset),
-           1 << MemoryChunk::CONTAINS_ONLY_DATA);
-    // Jump if we need to mark it grey and push it.
-    j(zero, not_data_object, not_data_object_distance);
-  }
-}
-
-
-void MacroAssembler::MarkBits(Register addr_reg,
-                              Register bitmap_reg,
-                              Register mask_reg) {
-  ASSERT(!Aliasing(addr_reg, bitmap_reg, mask_reg, ecx));
-  mov(bitmap_reg, Operand(addr_reg));
-  and_(bitmap_reg, ~Page::kPageAlignmentMask);
-  mov(ecx, Operand(addr_reg));
-  shr(ecx, Bitmap::kBitsPerCellLog2);
-  and_(ecx,
-       (Page::kPageAlignmentMask >> Bitmap::kBitsPerCellLog2) &
-           ~(kPointerSize - 1));
-
-  add(bitmap_reg, Operand(ecx));
-  mov(ecx, Operand(addr_reg));
-  shr(ecx, kPointerSizeLog2);
-  and_(ecx, (1 << Bitmap::kBitsPerCellLog2) - 1);
-  mov(mask_reg, Immediate(1));
-  shl_cl(mask_reg);
-}
-
-
-void MacroAssembler::EnsureNotWhite(
-    Register value,
-    Register bitmap_scratch,
-    Register mask_scratch,
-    Label* value_is_white_and_not_data,
-    Label::Distance distance,
-    bool in_new_space) {
-  ASSERT(!Aliasing(value, bitmap_scratch, mask_scratch, ecx));
-  MarkBits(value, bitmap_scratch, mask_scratch);
-
-  // If the value is black or grey we don't need to do anything.
-  ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0);
-  ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
-  ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0);
-  ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0);
-
-  Label done;
-
-  // Since both black and grey have a 1 in the first position and white does
-  // not have a 1 there we only need to check one bit.
-  test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize));
-  j(not_zero, &done, Label::kNear);
-
-  if (FLAG_debug_code) {
-    // Check for impossible bit pattern.
-    Label ok;
-    push(mask_scratch);
-    // shl.  May overflow making the check conservative.
-    add(mask_scratch, Operand(mask_scratch));
-    test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize));
-    j(zero, &ok, Label::kNear);
-    int3();
-    bind(&ok);
-    pop(mask_scratch);
-  }
-
-  // Value is white.  We check whether it is data that doesn't need scanning.
-  IsDataObject(value, ecx, value_is_white_and_not_data, distance, in_new_space);
-
-  // Value is a data object, and it is white.  Mark it black.  Since we know
-  // that the object is white we can make it black by flipping one bit.
-  or_(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch);
-  bind(&done);
-}
-
-} }  // namespace v8::internal
-
-#endif  // V8_IA32_MACRO_ASSEMBLER_IA32_INL_H_