Add bit_field3 to Map objects

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index f38e2eefa6c4cd9669cbf236e8f4af0bce4b49b8..5e720bf413106a748daae255f5d445119d73340a 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -1969,6 +1969,17 @@ void MacroAssembler::Abort(const char* msg) {
 }
 
 
+void MacroAssembler::LoadInstanceDescriptors(Register map,
+                                             Register descriptors) {
+  mov(descriptors,
+      FieldOperand(map, Map::kInstanceDescriptorsOrBitField3Offset));
+  Label not_smi;
+  JumpIfNotSmi(descriptors, &not_smi);

[Mads Ager (chromium), 2011/05/23 10:14:51]

Does this accept a Label::kNear argument. This should be a near jump.

[danno, 2011/06/01 13:15:11]

There is no Label::xxx parameter supported on the SMI check macros yet. Somebody
(Jakob?) should go back and fix them.
On 2011/05/23 10:14:51, Mads Ager wrote:

+  mov(descriptors, isolate()->factory()->empty_descriptor_array());
+  bind(&not_smi);
+}
+
+
 void MacroAssembler::LoadPowerOf2(XMMRegister dst,
                                   Register scratch,
                                   int power) {