If both X & Y are vectors, GCC will report error (at least on our port based on
4.5)
as invalid operands to ==. Not sure if it is extended for 4.7.
Bingfeng
-Original Message-
From: gcc-ow...@gcc.gnu.org [mailto:gcc-ow...@gcc.gnu.org] On Behalf Of Iyer,
Balaji V
Sent: 17 May 2012 00:01
On 5/16/2012 4:01 PM, Iyer, Balaji V wrote:
Hello Everyone,
I have a question regarding the vectorizer. In the following code
below...
Int func (int x, int y)
{
If (x==y)
Return (x+y);
Else
Return (x-y);
}
If we force the x and y to be ve
Great!
Thanks, K
>
> Let me hack up a quick pattern recognizer for this...
>
> Jakub
On Tue, Dec 13, 2011 at 05:42:16PM +0400, Kirill Yukhin wrote:
> The full case attached.
>
> Jakub, you are right, we have to convert signed ints into something a
> bit more tricky.
> BTW, here is output for that cases from Intel compiler:
Ah, so that matches to do j / 2 in the pattern recognizer
The full case attached.
Jakub, you are right, we have to convert signed ints into something a
bit more tricky.
BTW, here is output for that cases from Intel compiler:
vpxor %ymm1, %ymm1, %ymm1 #184.23
vmovdqu .L_2il0floatpacket.12(%rip), %ymm0
On Tue, Dec 13, 2011 at 02:07:11PM +0100, Richard Guenther wrote:
> > Hi guys,
> > While looking at Spec2006/401.bzip2 I found such a loop:
> > for (i = 1; i <= alphaSize; i++) {
> > j = weight[i] >> 8;
> > j = 1 + (j / 2);
> > weight[i] = j << 8;
> > }
It would be helpfu
On Tue, 13 Dec 2011, Kirill Yukhin wrote:
> Hi guys,
> While looking at Spec2006/401.bzip2 I found such a loop:
> for (i = 1; i <= alphaSize; i++) {
> j = weight[i] >> 8;
> j = 1 + (j / 2);
> weight[i] = j << 8;
> }
>
> Which is not vectorizeble (using Intel's AVX2) beca
It would be nice to have a stand-alone testcase for this, so please
file a bugreport.
I've opened PR37150 for this.
Thanks,
Joost
2008/8/18 VandeVondele Joost <[EMAIL PROTECTED]>:
>
> The attached testcase yields (on a core2 duo, gcc trunk):
>
>> gfortran -O3 -ftree-vectorize -ffast-math -march=native test.f90
>> time ./a.out
>
> real0m3.414s
>
>> ifort -xT -O3 test.f90
>> time ./a.out
>
> real0m1.556s
>
> The assemb
