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Date: Thu, 22 Dec 2011 13:48:00 -0000
From: Richard Earnshaw <rearnsha@arm.com>
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To: Dmitry Plotnikov <dplotnikov@ispras.ru>
CC: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,  Ira Rosen <IRAR@il.ibm.com>, Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org>,  "Joseph S. Myers" <joseph@codesourcery.com>, Richard Henderson <rth@redhat.com>, "dm@ispras.ru" <dm@ispras.ru>
Subject: Re: [PATCH][PING] Vectorize conversions directly
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On 22/12/11 13:14, Dmitry Plotnikov wrote:

> gcc/config/arm/
>      * neon.md (float<mode><V_CVTTOF>2): New.
>        (floatuns<mode><V_CVTTOF>2): New.
>        (fix_trunc<mode><V_CVTTOI>2): New.
>        (fix_truncuns<mode><V_CVTTOI>2): New.
>      * iterators.md (V_CVTTOF): New iterator.
>        (V_CVTTOI): New iterator.
>=20
>=20
> diff --git a/gcc/config/arm/iterators.md b/gcc/config/arm/iterators.md
> index 85dd641..de4340c 100644
> --- a/gcc/config/arm/iterators.md
> +++ b/gcc/config/arm/iterators.md
> @@ -197,6 +197,10 @@
>  (define_mode_attr V_CVTTO [(V2SI "V2SF") (V2SF "V2SI")
>                 (V4SI "V4SF") (V4SF "V4SI")])
>=20=20
> +(define_mode_attr V_CVTTOF [(V2SI "v2sf") (V4SI "v4sf")])
> +
> +(define_mode_attr V_CVTTOI [(V2SF "v2si") (V4SF "v4si")])
> +

attributes can be any superset of the iterator, so you don't need two
separate attributes here.

;; As above but in lower case.
(define_mode_attr V_cvtto [V2SI "v2sf") (V2SF "v2si")
                           (V4SI "v4sf") (V4SF "v4si")])

is perfectly adequate and matches other attributes in the ARM back-end.

The ARM bits are OK with that change.

R.