From: "Jiang, Haochen" <haochen.jiang@intel.com>
To: Uros Bizjak <ubizjak@gmail.com>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
"Liu, Hongtao" <hongtao.liu@intel.com>
Subject: RE: [PATCH] [i386]Add combine splitter to transform pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
Date: Sat, 7 May 2022 01:54:45 +0000 [thread overview]
Message-ID: <MN2PR11MB367899CFF789196493D7DA5FECC49@MN2PR11MB3678.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CAFULd4bbo1-fWNip6w+FDy1XeTXMk9epWS_HuWJYji1c0s_cEA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 4527 bytes --]
> -----Original Message-----
> From: Uros Bizjak <ubizjak@gmail.com>
> Sent: Friday, May 6, 2022 4:59 PM
> To: Jiang, Haochen <haochen.jiang@intel.com>
> Cc: gcc-patches@gcc.gnu.org; Liu, Hongtao <hongtao.liu@intel.com>
> Subject: Re: [PATCH] [i386]Add combine splitter to transform
> pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
>
> On Fri, May 6, 2022 at 10:01 AM Haochen Jiang <haochen.jiang@intel.com>
> wrote:
> >
> > Hi all,
> >
> > This patch aims to add a combine splitter to transform pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
> >
> > Regtested on x86_64-pc-linux-gnu. Ok for trunk?
> >
> > BRs,
> > Haochen
> >
> > gcc/ChangeLog:
> >
> > PR target/104371
> > * config/i386/sse.md: Add new define_mode_attr and define_split.
> >
> > gcc/testsuite/ChangeLog:
> >
> > PR target/104371
> > * gcc.target/i386/pr104371-1.c: New test.
> > * gcc.target/i386/pr104371-2.c: Ditto.
> > ---
> > gcc/config/i386/sse.md | 19 +++++++++++++++++++
> > gcc/testsuite/gcc.target/i386/pr104371-1.c | 14 ++++++++++++++
> > gcc/testsuite/gcc.target/i386/pr104371-2.c | 14 ++++++++++++++
> > 3 files changed, 47 insertions(+)
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr104371-1.c
> > create mode 100755 gcc/testsuite/gcc.target/i386/pr104371-2.c
> >
> > diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index
> > 7b791def542..71afda73c8f 100644
> > --- a/gcc/config/i386/sse.md
> > +++ b/gcc/config/i386/sse.md
> > @@ -20083,6 +20083,25 @@
> > (set_attr "prefix" "maybe_vex")
> > (set_attr "mode" "SI")])
> >
> > +;; Optimize pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
> > +(define_mode_attr vi1avx2const
> > + [(V32QI "0xffffffff") (V16QI "0xffff")])
> > +
> > +(define_split
> > + [(set (reg:CCZ FLAGS_REG)
> > + (compare:CCZ (unspec:SI
> > + [(eq:VI1_AVX2
> > + (match_operand:VI1_AVX2 0 "vector_operand")
> > + (match_operand:VI1_AVX2 1 "const0_operand"))]
> > + UNSPEC_MOVMSK)
> > + (match_operand 2 "const_int_operand")))]
> > + "TARGET_SSE4_1 && ix86_match_ccmode (insn, CCmode)
>
> No need to use ix86_match_ccmode here, the pattern is already limited to
> CCZmode,
>
> Uros.
>
Removed this condition in my new patch, also make the testcase change according to
Hongyu's review.
Is the patch Ok for trunk?
Haochen
> > + && (INTVAL (operands[2]) == (int) (<vi1avx2const>))"
> > + [(set (reg:CC FLAGS_REG)
> > + (unspec:CC [(match_dup 0)
> > + (match_dup 0)]
> > + UNSPEC_PTEST))])
> > +
> > (define_expand "sse2_maskmovdqu"
> > [(set (match_operand:V16QI 0 "memory_operand")
> > (unspec:V16QI [(match_operand:V16QI 1 "register_operand") diff
> > --git a/gcc/testsuite/gcc.target/i386/pr104371-1.c
> > b/gcc/testsuite/gcc.target/i386/pr104371-1.c
> > new file mode 100644
> > index 00000000000..df7c0b074e3
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr104371-1.c
> > @@ -0,0 +1,14 @@
> > +/* { dg-do compile } */
> > +/* { dg-options "-O2 -msse4" } */
> > +/* { dg-final { scan-assembler "ptest\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "pxor\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "pcmpeqb\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "pmovmskb\[ \\t\]" } } */
> > +
> > +#include <smmintrin.h>
> > +#include <stdbool.h>
> > +
> > +bool is_zero(__m128i x)
> > +{
> > + return _mm_movemask_epi8(_mm_cmpeq_epi8(x, _mm_setzero_si128()))
> ==
> > +0xffff; }
> > diff --git a/gcc/testsuite/gcc.target/i386/pr104371-2.c
> > b/gcc/testsuite/gcc.target/i386/pr104371-2.c
> > new file mode 100755
> > index 00000000000..f0d0afd5897
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr104371-2.c
> > @@ -0,0 +1,14 @@
> > +/* { dg-do compile } */
> > +/* { dg-options "-O2 -mavx2" } */
> > +/* { dg-final { scan-assembler "vptest\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "vpxor\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "vpcmpeqb\[ \\t\]" } } */
> > +/* { dg-final { scan-assembler-not "vpmovmskb\[ \\t\]" } } */
> > +
> > +#include <immintrin.h>
> > +#include <stdbool.h>
> > +
> > +bool is_zero256(__m256i x)
> > +{
> > + return _mm256_movemask_epi8(_mm256_cmpeq_epi8(x,
> > +_mm256_setzero_si256())) == 0xffffffff; }
> > --
> > 2.18.1
> >
[-- Attachment #2: 0001-i386-Add-combine-splitter-to-transform-pxor-pcmpeqb-.patch --]
[-- Type: application/octet-stream, Size: 3170 bytes --]
From 3c53e77c141ff12169b18e0bac7201af471d4b25 Mon Sep 17 00:00:00 2001
From: Haochen Jiang <haochen.jiang@intel.com>
Date: Tue, 8 Feb 2022 10:51:26 +0800
Subject: [PATCH] [i386]Add combine splitter to transform
pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
gcc/ChangeLog:
PR target/104371
* config/i386/sse.md: Add new define_mode_attr and define_split.
gcc/testsuite/ChangeLog:
PR target/104371
* gcc.target/i386/pr104371-1.c: New test.
* gcc.target/i386/pr104371-2.c: Ditto.
---
gcc/config/i386/sse.md | 18 ++++++++++++++++++
gcc/testsuite/gcc.target/i386/pr104371-1.c | 13 +++++++++++++
gcc/testsuite/gcc.target/i386/pr104371-2.c | 13 +++++++++++++
3 files changed, 44 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/i386/pr104371-1.c
create mode 100755 gcc/testsuite/gcc.target/i386/pr104371-2.c
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 7b791def542..d264713fa1b 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -20083,6 +20083,24 @@
(set_attr "prefix" "maybe_vex")
(set_attr "mode" "SI")])
+;; Optimize pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
+(define_mode_attr vi1avx2const
+ [(V32QI "0xffffffff") (V16QI "0xffff")])
+
+(define_split
+ [(set (reg:CCZ FLAGS_REG)
+ (compare:CCZ (unspec:SI
+ [(eq:VI1_AVX2
+ (match_operand:VI1_AVX2 0 "vector_operand")
+ (match_operand:VI1_AVX2 1 "const0_operand"))]
+ UNSPEC_MOVMSK)
+ (match_operand 2 "const_int_operand")))]
+ "TARGET_SSE4_1 && (INTVAL (operands[2]) == (int) (<vi1avx2const>))"
+ [(set (reg:CC FLAGS_REG)
+ (unspec:CC [(match_dup 0)
+ (match_dup 0)]
+ UNSPEC_PTEST))])
+
(define_expand "sse2_maskmovdqu"
[(set (match_operand:V16QI 0 "memory_operand")
(unspec:V16QI [(match_operand:V16QI 1 "register_operand")
diff --git a/gcc/testsuite/gcc.target/i386/pr104371-1.c b/gcc/testsuite/gcc.target/i386/pr104371-1.c
new file mode 100644
index 00000000000..b4373c55ab2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr104371-1.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse4" } */
+/* { dg-final { scan-assembler "ptest\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "pxor\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "pcmpeqb\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "pmovmskb\[ \\t\]" } } */
+
+#include <smmintrin.h>
+
+int is_zero(__m128i x)
+{
+ return _mm_movemask_epi8(_mm_cmpeq_epi8(x, _mm_setzero_si128())) == 0xffff;
+}
diff --git a/gcc/testsuite/gcc.target/i386/pr104371-2.c b/gcc/testsuite/gcc.target/i386/pr104371-2.c
new file mode 100755
index 00000000000..3431ffc1cc2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr104371-2.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mavx2" } */
+/* { dg-final { scan-assembler "vptest\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "vpxor\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "vpcmpeqb\[ \\t\]" } } */
+/* { dg-final { scan-assembler-not "vpmovmskb\[ \\t\]" } } */
+
+#include <immintrin.h>
+
+int is_zero256(__m256i x)
+{
+ return _mm256_movemask_epi8(_mm256_cmpeq_epi8(x, _mm256_setzero_si256())) == 0xffffffff;
+}
--
2.18.1
next prev parent reply other threads:[~2022-05-07 1:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-06 8:00 Haochen Jiang
2022-05-06 8:49 ` Hongyu Wang
2022-05-07 1:33 ` Jiang, Haochen
2022-05-06 8:58 ` Uros Bizjak
2022-05-07 1:54 ` Jiang, Haochen [this message]
2022-05-12 3:01 ` Jiang, Haochen
2022-05-12 9:11 ` Uros Bizjak
2022-05-12 9:19 ` Jiang, Haochen
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