http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50413
Anatoly <aries.nah at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |
--- Comment #4 from Anatoly <aries.nah at gmail dot com> 2011-09-15 13:42:05
UTC ---
It's not serious.
Yes, I'm not an expert in SSE instructions (and in ASM at all), and it seems
you're right about shifting.
But, the bug is a real. GCC losts lower bit of upper quadword during shifting
by psrlq.
Try to compile my code and check it out.
We have V.bitmap.b63 = V.bitmap.b64; to shift a lower bit of the upper quadword
but GCC has decided not to do this.
