X87: [heap] Move to page lookups for SemiSpace, NewSpace, and Heap containment methods.

src/x87/macro-assembler-x87.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 146 matching lines @@
   }
 
   for (int i = kNumberOfSavedRegs - 1; i >= 0; i--) {
     Register reg = saved_regs[i];
     if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) {
       pop(reg);
     }
   }
 }
 
-void MacroAssembler::InNewSpace(
-    Register object,
-    Register scratch,
-    Condition cc,
-    Label* condition_met,
-    Label::Distance condition_met_distance) {
-  DCHECK(cc == equal || cc == not_equal);
-  if (scratch.is(object)) {
-    and_(scratch, Immediate(~Page::kPageAlignmentMask));
-  } else {
-    mov(scratch, Immediate(~Page::kPageAlignmentMask));
-    and_(scratch, object);
-  }
-  // Check that we can use a test_b.
-  DCHECK(MemoryChunk::IN_FROM_SPACE < 8);
-  DCHECK(MemoryChunk::IN_TO_SPACE < 8);
-  int mask = (1 << MemoryChunk::IN_FROM_SPACE)
-           | (1 << MemoryChunk::IN_TO_SPACE);
-  // If non-zero, the page belongs to new-space.
-  test_b(Operand(scratch, MemoryChunk::kFlagsOffset),
-         static_cast<uint8_t>(mask));
-  j(cc, condition_met, condition_met_distance);
+void MacroAssembler::InNewSpace(Register object, Register scratch, Condition cc,
+                                Label* condition_met,
+                                Label::Distance distance) {
+  const int mask =
+      (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE);
+  CheckPageFlag(object, scratch, mask, cc, condition_met, distance);
 }
 
 
 void MacroAssembler::RememberedSetHelper(
     Register object,  // Only used for debug checks.
     Register addr, Register scratch, SaveFPRegsMode save_fp,
     MacroAssembler::RememberedSetFinalAction and_then) {
   Label done;
   if (emit_debug_code()) {
     Label ok;
@@ skipping 2881 matching lines @@
   mov(eax, dividend);
   shr(eax, 31);
   add(edx, eax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87