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* [Bug target/96891] New: [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version
@ 2020-09-02 3:10 crazylht at gmail dot com
2021-01-04 6:51 ` [Bug target/96891] " crazylht at gmail dot com
2021-01-22 4:37 ` cvs-commit at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: crazylht at gmail dot com @ 2020-09-02 3:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96891
Bug ID: 96891
Summary: [AVX512] For vector compare to dest vector, avx512
vector compare could be lowered to avx version
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: crazylht at gmail dot com
Target Milestone: ---
Target: x86_64-*-* i?86-*-*
cat test.cpp
---
typedef float v8sf __attribute__ ((vector_size (32)));
v8sf test4(v8sf a, v8sf b)
{
return a >= b;
}
---
gcc -O2 -mavx512f -mavx512vl -S
---
test4:
vcmpps k1, ymm1, ymm0, 2
vpternlogd ymm0{k1}{z}, ymm0, ymm0, 0x81
ret
---
gcc -O2 -mavx
---
test4:
vcmpleps ymm0, ymm1, ymm0
ret
---
Add peephole 2 handle this?
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/96891] [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version
2020-09-02 3:10 [Bug target/96891] New: [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version crazylht at gmail dot com
@ 2021-01-04 6:51 ` crazylht at gmail dot com
2021-01-22 4:37 ` cvs-commit at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: crazylht at gmail dot com @ 2021-01-04 6:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96891
Hongtao.liu <crazylht at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 98348 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/96891] [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version
2020-09-02 3:10 [Bug target/96891] New: [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version crazylht at gmail dot com
2021-01-04 6:51 ` [Bug target/96891] " crazylht at gmail dot com
@ 2021-01-22 4:37 ` cvs-commit at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-01-22 4:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96891
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:
https://gcc.gnu.org/g:ee78c20e74d30284fee36e22a64e86e45e676029
commit r11-6849-gee78c20e74d30284fee36e22a64e86e45e676029
Author: liuhongt <hongtao.liu@intel.com>
Date: Fri Dec 18 15:56:06 2020 +0800
Lower AVX512 vector comparison to AVX version when dest is vector.
gcc/ChangeLog:
PR target/96891
PR target/98348
* config/i386/sse.md (VI_128_256): New mode iterator.
(*avx_cmp<mode>3_1, *avx_cmp<mode>3_2, *avx_cmp<mode>3_3,
*avx_cmp<mode>3_4, *avx2_eq<mode>3, *avx2_pcmp<mode>3_1,
*avx2_pcmp<mode>3_2, *avx2_gt<mode>3): New
define_insn_and_split to lower avx512 vector comparison to avx
version when dest is vector.
(*<avx512>_cmp<mode>3,*<avx512>_cmp<mode>3,*<avx512>_ucmp<mode>3):
define_insn_and_split for negating the comparison result.
* config/i386/predicates.md (float_vector_all_ones_operand):
New predicate.
* config/i386/i386-expand.c (ix86_expand_sse_movcc): Use
general NOT operator without UNSPEC_MASKOP.
gcc/testsuite/ChangeLog:
PR target/96891
PR target/98348
* gcc.target/i386/avx512bw-pr96891-1.c: New test.
* gcc.target/i386/avx512f-pr96891-1.c: New test.
* gcc.target/i386/avx512f-pr96891-2.c: New test.
* gcc.target/i386/avx512f-pr96891-3.c: New test.
* g++.target/i386/avx512f-pr96891-1.C: New test.
* gcc.target/i386/bitwise_mask_op-3.c: Adjust testcase.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-09-02 3:10 [Bug target/96891] New: [AVX512] For vector compare to dest vector, avx512 vector compare could be lowered to avx version crazylht at gmail dot com
2021-01-04 6:51 ` [Bug target/96891] " crazylht at gmail dot com
2021-01-22 4:37 ` cvs-commit at gcc dot gnu.org
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