------- Comment #1 from pinskia at gcc dot gnu dot org 2010-03-13 01:35 -------
GCC 4.5 is able to produce pmovzxbw via sse4_1_zero_extendv8qiv8hi2 but it does
not accept a memory operand for operand 1.
movdqa x(%rip), %xmm0
pmovzxbw %xmm0, %xmm1
psrldq $8, %xmm0
pmovzxbw %xmm0, %xmm0
movdqa %xmm1, y(%rip)
movdqa %xmm0, y+16(%rip)
...
Is what GCC currently produces.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|tree-optimization |target
Ever Confirmed|0 |1
GCC target triplet| |i?86-*-* x86_64-*-*
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2010-03-13 01:35:56
date| |
Summary|Integer externsions aren't |Integer externsions
|vectorized |vectorization could be
| |improved
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31667
