[heap] Black is encoded with 11, grey with 10.

src/ppc/macro-assembler-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
@@ skipping 3156 matching lines @@
     bne(condition_met, cr0);
   }
   if (cc == eq) {
     beq(condition_met, cr0);
   }
 }
 
 
 void MacroAssembler::JumpIfBlack(Register object, Register scratch0,
                                  Register scratch1, Label* on_black) {
-  HasColor(object, scratch0, scratch1, on_black, 1, 0);  // kBlackBitPattern.
-  DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0);
+  HasColor(object, scratch0, scratch1, on_black, 1, 1);  // kBlackBitPattern.
+  DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0);
 }
 
 
 void MacroAssembler::HasColor(Register object, Register bitmap_scratch,
                               Register mask_scratch, Label* has_color,
                               int first_bit, int second_bit) {
   DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg));
 
   GetMarkBits(object, bitmap_scratch, mask_scratch);
 
@@ skipping 36 matching lines @@
 
 
 void MacroAssembler::JumpIfWhite(Register value, Register bitmap_scratch,
                                  Register mask_scratch, Register load_scratch,
                                  Label* value_is_white) {
   DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ip));
   GetMarkBits(value, bitmap_scratch, mask_scratch);
 
   // If the value is black or grey we don't need to do anything.
   DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0);
-  DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0);
-  DCHECK(strcmp(Marking::kGreyBitPattern, "11") == 0);
+  DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0);
+  DCHECK(strcmp(Marking::kGreyBitPattern, "10") == 0);
   DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0);
 
   // 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.
   lwz(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
   and_(r0, mask_scratch, load_scratch, SetRC);
   beq(value_is_white, cr0);
 }
 
 
@@ skipping 1051 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC