Introduce SmiValuesAre31Bits and SmiValuesAre32Bits global predicate functions

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 24ee60f1bb4dcec1934b5d1a486f41bc734dd2f0..ee5aff685f91d68ccf1c1a3734fb85bee0bb9eac 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5450,6 +5450,9 @@ template <> struct SmiTagging<8> {
 };
 
 typedef SmiTagging<kApiPointerSize> PlatformSmiTagging;
+V8_INLINE(static bool SmiValuesAre31Bits()) { return kApiPointerSize == 4; }
+V8_INLINE(static bool SmiValuesAre32Bits()) { return kApiPointerSize == 8; }

[danno, 2013/08/13 09:41:36]

Please put this after "const int kSmiValueSize..." below, and use kSmiValueSize
== 31/32 as the comparison, I think it's a little clearer.

[haitao.feng, 2013/08/13 10:37:53]

Done.

+
 const int kSmiShiftSize = PlatformSmiTagging::kSmiShiftSize;
 const int kSmiValueSize = PlatformSmiTagging::kSmiValueSize;