From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by sourceware.org (Postfix) with ESMTPS id 838173851886 for ; Wed, 23 Nov 2022 12:30:24 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 838173851886 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1669206624; x=1700742624; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=uiEJEwieAX9j+4VbYgTqHnIHNHBJnMsxQWeyQqC4J6I=; b=RTpE3nLIRes/mngdEVkSbVce67vP/CLTKq/7gB84x91yjtpdSzpcJLRk 3ya3yrx7dDBcwqCqSlaanzgaVSjKr6UrFgFZxEj9XLB/5n4yNGtikhTK/ DgnU5ooUUBVA/X4JZvot5X2/8oNjVAchq9CP53ercrFrJcG6NqsQvLkUK YdvsUcX4MP1q7BNm32lPhfE9Znl+Q6r8PzyOdEdWwB2/JUSaudnhMQkO3 lph3TH+g8TI28qWYCVnWW18azQVcoAOTRmBCIhfN8XZdFiduQT8dnlVFK XZqm1sQBpy/91QNQnIZhRwB6+H7Pr0puFf1XlyrgFV1d9Wq/Scvnk32AL Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10539"; a="340934533" X-IronPort-AV: E=Sophos;i="5.96,187,1665471600"; d="scan'208";a="340934533" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Nov 2022 04:30:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10539"; a="641782453" X-IronPort-AV: E=Sophos;i="5.96,187,1665471600"; d="scan'208";a="641782453" Received: from shvmail03.sh.intel.com ([10.239.245.20]) by orsmga002.jf.intel.com with ESMTP; 23 Nov 2022 04:30:20 -0800 Received: from shliclel4051.sh.intel.com (shliclel4051.sh.intel.com [10.239.240.51]) by shvmail03.sh.intel.com (Postfix) with ESMTP id 3F638100568F; Wed, 23 Nov 2022 20:30:20 +0800 (CST) From: liuhongt To: gcc-patches@gcc.gnu.org Cc: crazylht@gmail.com, hjl.tools@gmail.com, ubizjak@gmail.com Subject: [PATCH] [x86] Fix incorrect implementation for mm_cvtsbh_ss. Date: Wed, 23 Nov 2022 20:28:20 +0800 Message-Id: <20221123122820.3150670-1-hongtao.liu@intel.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-12.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,KAM_SHORT,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: After supporting real __bf16 type, implementation of mm_cvtsbh_ss went wrong. The patch supports extendbfsf2/truncsfbf2 with pslld/psrld, and then refined the intrinsic with implicit conversion. Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. Ok for trunk? gcc/ChangeLog: PR target/107748 * config/i386/avx512bf16intrin.h (_mm_cvtsbh_ss): Refined. * config/i386/i386.md (extendbfsf2): New define_insn. (truncsfbf2): Ditto. gcc/testsuite/ChangeLog: * gcc.target/i386/extendbfsf.c: New test. * gcc.target/i386/avx512bf16-cvtsbh2ss-1.c: Adjust testcase. --- gcc/config/i386/avx512bf16intrin.h | 4 +-- gcc/config/i386/i386.md | 33 ++++++++++++++++++- .../gcc.target/i386/avx512bf16-cvtsbh2ss-1.c | 3 +- gcc/testsuite/gcc.target/i386/extendbfsf.c | 16 +++++++++ 4 files changed, 50 insertions(+), 6 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/extendbfsf.c diff --git a/gcc/config/i386/avx512bf16intrin.h b/gcc/config/i386/avx512bf16intrin.h index ea1d0125b3f..4a071bcd75a 100644 --- a/gcc/config/i386/avx512bf16intrin.h +++ b/gcc/config/i386/avx512bf16intrin.h @@ -46,9 +46,7 @@ extern __inline float __attribute__ ((__gnu_inline__, __always_inline__, __artificial__)) _mm_cvtsbh_ss (__bf16 __A) { - union{ float a; unsigned int b;} __tmp; - __tmp.b = ((unsigned int)(__A)) << 16; - return __tmp.a; + return __A; } /* vcvtne2ps2bf16 */ diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 01faa911b77..f5215596d44 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -4961,6 +4961,21 @@ (define_insn "*extendhf2" (set_attr "prefix" "evex") (set_attr "mode" "")]) +(define_insn "extendbfsf2" + [(set (match_operand:SF 0 "register_operand" "=x,Yw") + (float_extend:SF + (match_operand:BF 1 "register_operand" " 0,Yw")))] + "TARGET_SSE2" + "@ + pslld\t{$16, %0|%0, 16} + vpslld\t{$16, %1, %0|%0, %1, 16}" + [(set_attr "isa" "noavx,avx") + (set_attr "type" "sseishft") + (set_attr "length_immediate" "1") + (set_attr "prefix_data16" "1,*") + (set_attr "prefix" "orig,vex") + (set_attr "mode" "TI") + (set_attr "memory" "none")]) (define_expand "extendxf2" [(set (match_operand:XF 0 "nonimmediate_operand") @@ -5177,7 +5192,23 @@ (define_insn "*trunchf2" [(set_attr "type" "ssecvt") (set_attr "prefix" "evex") (set_attr "mode" "HF")]) - + +(define_insn "truncsfbf2" + [(set (match_operand:BF 0 "register_operand" "=x,Yw") + (float_truncate:BF + (match_operand:SF 1 "register_operand" " 0,Yw")))] + "TARGET_SSE2" + "@ + psrld\t{$16, %0|%0, 16} + vpsrld\t{$16, %1, %0|%0, %1, 16}" + [(set_attr "isa" "noavx,avx") + (set_attr "type" "sseishft") + (set_attr "length_immediate" "1") + (set_attr "prefix_data16" "1,*") + (set_attr "prefix" "orig,vex") + (set_attr "mode" "TI") + (set_attr "memory" "none")]) + ;; Signed conversion to DImode. (define_expand "fix_truncxfdi2" diff --git a/gcc/testsuite/gcc.target/i386/avx512bf16-cvtsbh2ss-1.c b/gcc/testsuite/gcc.target/i386/avx512bf16-cvtsbh2ss-1.c index 8e929e6f159..edf30b583b9 100644 --- a/gcc/testsuite/gcc.target/i386/avx512bf16-cvtsbh2ss-1.c +++ b/gcc/testsuite/gcc.target/i386/avx512bf16-cvtsbh2ss-1.c @@ -1,8 +1,7 @@ /* { dg-do compile } */ /* { dg-options "-mavx512bf16 -O2" } */ /* { dg-additional-options "-fno-PIE -mfpmath=sse" { target ia32 } } */ -/* { dg-final { scan-assembler-times "sall\[ \\t\]+\[^\{\n\]*16" 1 } } */ -/* { dg-final { scan-assembler-times "movl" 1 } } */ +/* { dg-final { scan-assembler-times "pslld" 1 } } */ #include diff --git a/gcc/testsuite/gcc.target/i386/extendbfsf.c b/gcc/testsuite/gcc.target/i386/extendbfsf.c new file mode 100644 index 00000000000..f1b4c218742 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/extendbfsf.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ +/* { dg-options "-msse2 -O2" } */ +/* { dg-final { scan-assembler-times "pslld" 1 } } */ +/* { dg-final { scan-assembler-times "psrld" 1 } } */ + +float +extendsfbf (__bf16 a) +{ + return a; +} + +__bf16 +truncsfbf (float a) +{ + return a; +} -- 2.27.0