From: Haochen Jiang <haochen.jiang@intel.com>
To: gcc-patches@gcc.gnu.org
Cc: hongtao.liu@intel.com, ubizjak@gmail.com
Subject: [PATCH] [i386]Add combine splitter to transform pxor/pcmpeqb/pmovmskb/cmp 0xffff to ptest.
Date: Fri, 6 May 2022 16:00:56 +0800 [thread overview]
Message-ID: <20220506080056.84313-1-haochen.jiang@intel.com> (raw)
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)
+ && (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
next reply other threads:[~2022-05-06 8:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-06 8:00 Haochen Jiang [this message]
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
2022-05-12 3:01 ` Jiang, Haochen
2022-05-12 9:11 ` Uros Bizjak
2022-05-12 9:19 ` Jiang, Haochen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220506080056.84313-1-haochen.jiang@intel.com \
--to=haochen.jiang@intel.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=hongtao.liu@intel.com \
--cc=ubizjak@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).