On Fri, Nov 28, 2014 at 12:33 PM, Evgeny Stupachenko wrote:
> Hi,
>
> After fixing PR60451 (pack scheme instead of pshufb) general power of
> 2 permutations become more profitable.
> So I'd like to revert the changes keeping algorithm live or implement
> new hook to use best algorithm/size for par
Hi,
After fixing PR60451 (pack scheme instead of pshufb) general power of
2 permutations become more profitable.
So I'd like to revert the changes keeping algorithm live or implement
new hook to use best algorithm/size for particular -mtune.
Below is reverting patch. Bootstrap and make check pass
On Wed, Nov 12, 2014 at 2:15 PM, Evgeny Stupachenko wrote:
> To avoid misunderstanding.
> I haven't yet committed this obvious fix.
> Is it ok?
If it is obvious, then it doesn't need an approval.
So, OK.
Thanks,
Uros.
To avoid misunderstanding.
I haven't yet committed this obvious fix.
Is it ok?
On Wed, Nov 12, 2014 at 2:15 PM, Evgeny Stupachenko wrote:
> Committed r217359.
> However, it appeared that AVX2 uses vperm2i128 for the shift here
> (instead of palignr for SSSE3/AVX). To handle AVX2 case we need to
>
Committed r217359.
However, it appeared that AVX2 uses vperm2i128 for the shift here
(instead of palignr for SSSE3/AVX). To handle AVX2 case we need to
modify test case:
diff --git a/gcc/testsuite/gcc.target/i386/pr52252-atom-1.c
b/gcc/testsuite/gcc.target/i386/pr52252-atom-1.c
index 1fbd258..020e
On Tue, Nov 11, 2014 at 3:21 PM, Evgeny Stupachenko wrote:
> Hi,
>
> The patch extends shift permutations technique on power of 2 cases
> (previously even/odd transformations was used unconditionally).
> Basically the patch just add loop for load group of length 2, like it
> is done in "vect_permu
Hi,
The patch extends shift permutations technique on power of 2 cases
(previously even/odd transformations was used unconditionally).
Basically the patch just add loop for load group of length 2, like it
is done in "vect_permute_load_chain" function.
For Silvermont it reduces insn sequence for l
