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Unified Diff: src/ia32/macro-assembler-ia32-inl.h

Issue 7089010: Now that the macro-assembler functions are not templatized on (Closed) Base URL: http://v8.googlecode.com/svn/branches/experimental/gc/
Patch Set: Created 9 years, 7 months ago
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Index: src/ia32/macro-assembler-ia32-inl.h
===================================================================
--- src/ia32/macro-assembler-ia32-inl.h (revision 8114)
+++ src/ia32/macro-assembler-ia32-inl.h (working copy)
@@ -1,198 +0,0 @@
-// 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_
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