PPC: [heap] Move to page lookups for SemiSpace, NewSpace, and Heap containment methods

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 284 matching lines @@
 void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index,
                                Condition cond) {
   DCHECK(Heap::RootCanBeWrittenAfterInitialization(index));
   DCHECK(cond == al);
   StoreP(source, MemOperand(kRootRegister, index << kPointerSizeLog2), r0);
 }
 
 
 void MacroAssembler::InNewSpace(Register object, Register scratch,
                                 Condition cond, Label* branch) {
-  // N.B. scratch may be same register as object
   DCHECK(cond == eq || cond == ne);
-  mov(r0, Operand(ExternalReference::new_space_mask(isolate())));
-  and_(scratch, object, r0);
-  mov(r0, Operand(ExternalReference::new_space_start(isolate())));
-  cmp(scratch, r0);
-  b(cond, branch);
+  const int mask =
+      (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE);
+  CheckPageFlag(object, scratch, mask, cond, branch);
 }
 
 
 void MacroAssembler::RecordWriteField(
     Register object, int offset, Register value, Register dst,
     LinkRegisterStatus lr_status, SaveFPRegsMode save_fp,
     RememberedSetAction remembered_set_action, SmiCheck smi_check,
     PointersToHereCheck pointers_to_here_check_for_value) {
   // First, check if a write barrier is even needed. The tests below
   // catch stores of Smis.
@@ skipping 4069 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