Updates:
Status: Fixed
Comment #2 on issue 1495 by [email protected]: Smaller instruction
for write barrier (ia32)
http://code.google.com/p/v8/issues/detail?id=1495
Fixed for IA32 in r8978. For X64 we already use the smaller version. For
ARM we either use the ARMv7 "ubfx" instruction or a two-instruction
supplement, in both cases the mask fits into the immediate. On the NewGC
branch a similar idiom is used in GetMarkBits(), but it already uses the
smaller version on all architectures.
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