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Re: [PATCH][PING] Vectorize conversions directly
- From: Ira Rosen <IRAR at il dot ibm dot com>
- To: Ramana Radhakrishnan <ramana dot radhakrishnan at linaro dot org>
- Cc: Dmitry Plotnikov <dplotnikov at ispras dot ru>, gcc-patches at gcc dot gnu dot org, "Joseph S. Myers" <joseph at codesourcery dot com>, Richard Henderson <rth at redhat dot com>
- Date: Sat, 26 Nov 2011 10:00:38 +0200
- Subject: Re: [PATCH][PING] Vectorize conversions directly
- References: <4EA04B20.1090009@ispras.ru> <4EA51EBB.9010506@ispras.ru> <Pine.LNX.4.64.1110241359470.6925@digraph.polyomino.org.uk> <CACUk7=UEPqYkg2Z-kH6EuSK13LGvPfLK-_u26X9NgyOOuw=rsw@mail.gmail.com> <Pine.LNX.4.64.1110241643180.6925@digraph.polyomino.org.uk> <4EAA6637.4010009@ispras.ru> <CACUk7=UVEhVJipTsnpjcabeh8Yohi3ugJhvWUy2XEWRFTiHSww@mail.gmail.com>
gcc-patches-owner@gcc.gnu.org wrote on 22/11/2011 03:31:22 PM:
> From: Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org>
> > gcc/testsuite/lib/
> > ? ?* target-supports.exp (check_effective_target_vect_intfloat_cvt):
True
> > ? ? ?for ARM NEON.
> > ? ? ?(check_effective_target_vect_uintfloat_cvt): Likewise.
> > ? ? ?(check_effective_target_vect_intfloat_cvt): Likewise.
> > ? ? ?(check_effective_target_vect_floatuint_cvt): Likewise.
> > ? ? ?(check_effective_target_vect_floatint_cvt): Likewise.
> > ? ? ?(check_effective_target_vect_extract_even_odd): Likewise.
>
> I'm not sure about enabling the vect_extract_even_odd case. If this
> assumes the presence of an extract-even-odd from registers type
> operation, then the Neon port doesn't really support vec_extract_even
> / vec_extract_odd forms - You do have them in one single instruction
> if you tried to load them from / or store them to memory which is the
> vld2 / vst2 instruction while the register form of vuzp which reads
> and writes to both source operands is not really supported directly
> from the backend.
Right.
Dmitry, you can do this instead:
Index: fast-math-pr35982.c
===================================================================
--- fast-math-pr35982.c (revision 181150)
+++ fast-math-pr35982.c (working copy)
@@ -20,7 +20,7 @@
return avg;
}
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1
"vect" { target vect_extract_even_odd } } } */
-/* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" { xfail
vect_extract_even_odd } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1
"vect" { target { vect_extract_even_odd || vect_strided2 } } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" { xfail
{ vect_extract_even_odd || vect_strided2 } } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */
Ira
>
> The other testsuite changes look OK to me.
>
> cheers
> Ramana
>
> >
>