From: Jeff Law <law@redhat.com>
To: gcc-patches@gcc.gnu.org, richard.sandiford@linaro.org
Subject: Re: [5/10] Add vect_perm3_* target selectors
Date: Wed, 08 Nov 2017 19:49:00 -0000 [thread overview]
Message-ID: <6772f26b-f010-a285-ba5a-93b898d3f06b@redhat.com> (raw)
In-Reply-To: <87vairpc6f.fsf@linaro.org>
On 11/03/2017 10:19 AM, Richard Sandiford wrote:
> SLP load permutation fails if any individual permutation requires more
> than two vector inputs. For 128-bit vectors, it's possible to permute
> 3 contiguous loads of 32-bit and 8-bit elements, but not 16-bit elements
> or 64-bit elements. The results are reversed for 256-bit vectors,
> and so on for wider vectors.
>
> This patch adds a routine that tests whether a permute will require
> three vectors for a given vector count and element size, then adds
> vect_perm3_* target selectors for the cases that we currently use.
>
>
> 2017-11-03 Richard Sandiford <richard.sandiford@linaro.org>
> Alan Hayward <alan.hayward@arm.com>
> David Sherwood <david.sherwood@arm.com>
>
> gcc/
> * doc/sourcebuild.texi (vect_perm_short, vect_perm_byte): Document
> previously undocumented selectors.
> (vect_perm3_byte, vect_perm3_short, vect_perm3_int): Document.
>
> gcc/testsuite/
> * lib/target-supports.exp (vect_perm_supported): New proc.
> (check_effective_target_vect_perm3_int): Likewise.
> (check_effective_target_vect_perm3_short): Likewise.
> (check_effective_target_vect_perm3_byte): Likewise.
> * gcc.dg/vect/slp-perm-1.c: Expect SLP load permutation to
> succeed if vect_perm3_int.
> * gcc.dg/vect/slp-perm-5.c: Likewise.
> * gcc.dg/vect/slp-perm-6.c: Likewise.
> * gcc.dg/vect/slp-perm-7.c: Likewise.
> * gcc.dg/vect/slp-perm-8.c: Likewise vect_perm3_byte.
> * gcc.dg/vect/slp-perm-9.c: Likewise vect_perm3_short.
> Use vect_perm_short instead of vect_perm. Add a scan-tree-dump-not
> test for vect_perm3_short targets.
Going to take your word on the correctness of vect_perm_supported. :-)
OK for the trunk.
jeff
next prev parent reply other threads:[~2017-11-08 19:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-03 16:14 [0/10] Vectoriser testsuite tweaks Richard Sandiford
2017-11-03 16:16 ` [1/10] Consistently use asm volatile ("" ::: "memory") in vect tests Richard Sandiford
2017-11-08 19:10 ` Jeff Law
2017-11-03 16:17 ` [2/10] Add VECTOR_BITS to tree-vect.h Richard Sandiford
2017-11-08 19:13 ` Jeff Law
2017-11-03 16:18 ` [3/10] Add available_vector_sizes to target-supports.exp Richard Sandiford
2017-11-08 19:13 ` Jeff Law
2017-11-17 13:23 ` Christophe Lyon
2017-11-03 16:18 ` [4/10] Don't assume vect_multiple_sizes means 2 sizes Richard Sandiford
2017-11-08 19:21 ` Jeff Law
2017-11-03 16:19 ` [5/10] Add vect_perm3_* target selectors Richard Sandiford
2017-11-08 19:49 ` Jeff Law [this message]
2017-11-03 16:20 ` [6/10] Add a vect_element_align_preferred target selector Richard Sandiford
2017-11-08 22:31 ` Jeff Law
2017-11-03 16:21 ` [7/10] Add a vect_unaligned_possible " Richard Sandiford
2017-11-08 22:32 ` Jeff Law
2017-11-03 16:21 ` [8/10] Add a vect_variable_length " Richard Sandiford
2017-11-08 22:33 ` Jeff Law
2017-11-03 16:22 ` [9/10] Add a vect_align_stack_vars " Richard Sandiford
2017-11-08 22:40 ` Jeff Law
2017-11-03 16:23 ` [10/10] Add a vect_masked_store " Richard Sandiford
2017-11-08 22:44 ` Jeff Law
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