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Wed, 24 Aug 2022 08:14:06 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7F798AE045; Wed, 24 Aug 2022 08:13:45 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B3649AE04D; Wed, 24 Aug 2022 08:13:44 +0000 (GMT) Received: from pike.rch.stglabs.ibm.com (unknown [9.5.12.127]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 24 Aug 2022 08:13:44 +0000 (GMT) To: gcc-patches@gcc.gnu.org Subject: [PATCH] rs6000: using li/lis+oris/xoris to build constants Date: Wed, 24 Aug 2022 16:13:44 +0800 Message-Id: <20220824081344.70468-1-guojiufu@linux.ibm.com> X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 9Abg-WwY5eNLeLwm2kiT4sth4OeDljw6 X-Proofpoint-GUID: PLIClu_JxSxXFClY0mj095PmcUQAsGV0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-24_04,2022-08-22_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 malwarescore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=999 phishscore=0 impostorscore=0 suspectscore=0 mlxscore=0 priorityscore=1501 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208240032 X-Spam-Status: No, score=-12.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Jiufu Guo via Gcc-patches From: Jiufu Guo Reply-To: Jiufu Guo Cc: dje.gcc@gmail.com, segher@kernel.crashing.org, linkw@gcc.gnu.org Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1742029588797762338?= X-GMAIL-MSGID: =?utf-8?q?1742029588797762338?= Hi, PR106708 constaint some constants which can be support by li/lis + oris/xoris. For constant C: if ((c & 0xFFFFFFFF80008000ULL) == 0x80000000ULL) or say: 32(0)+1(1)+15(x)+1(0)+15(x), we could use li+oris to build constant 'C'. if ((c & 0xFFFFFFFF00008000ULL) == 0xFFFFFFFF00008000ULL) or say: 32(1)+16(x)+1(1)+15(x), using li+xoris would be ok. if ((c & 0xFFFFFFFF0000FFFFULL) == 0xFFFFFFFF00000000) or say: 32(1)+1(0)+15(x)+16(0), using lis+xoris would be ok. This patch update rs6000_emit_set_long_const to support these forms. Bootstrap and regtest pass on ppc64 and ppc64le. Is this ok for trunk? BR, Jeff(Jiufu) PR target/106708 gcc/ChangeLog: * config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Using li/lis + oris/xoris to build constants. gcc/testsuite/ChangeLog: * gcc.target/powerpc/pr106708.c: New test. * gcc.target/powerpc/pr106708.h: New file. * gcc.target/powerpc/pr106708_1.c: New test. --- gcc/config/rs6000/rs6000.cc | 22 +++++++++++++++++++ gcc/testsuite/gcc.target/powerpc/pr106708.c | 10 +++++++++ gcc/testsuite/gcc.target/powerpc/pr106708.h | 9 ++++++++ gcc/testsuite/gcc.target/powerpc/pr106708_1.c | 17 ++++++++++++++ 4 files changed, 58 insertions(+) create mode 100644 gcc/testsuite/gcc.target/powerpc/pr106708.c create mode 100644 gcc/testsuite/gcc.target/powerpc/pr106708.h create mode 100644 gcc/testsuite/gcc.target/powerpc/pr106708_1.c diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index df491bee2ea..243247fb838 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -10112,6 +10112,7 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c) { rtx temp; HOST_WIDE_INT ud1, ud2, ud3, ud4; + HOST_WIDE_INT orig_c = c; ud1 = c & 0xffff; c = c >> 16; @@ -10137,6 +10138,27 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c) gen_rtx_IOR (DImode, copy_rtx (temp), GEN_INT (ud1))); } + else if (ud4 == 0 && ud3 == 0 && (ud2 & 0x8000) && !(ud1 & 0x8000)) + { + temp = !can_create_pseudo_p () ? dest : gen_reg_rtx (DImode); + + /* li+oris */ + emit_move_insn (copy_rtx (temp), GEN_INT (ud1)); + emit_move_insn (dest, gen_rtx_IOR (DImode, copy_rtx (temp), + GEN_INT (ud2 << 16))); + } + else if ((ud4 == 0xffff && ud3 == 0xffff) + && ((ud1 & 0x8000) || (ud1 == 0 && !(ud2 & 0x8000)))) + { + temp = !can_create_pseudo_p () ? dest : gen_reg_rtx (DImode); + + HOST_WIDE_INT imm = (ud1 & 0x8000) ? ((ud1 ^ 0x8000) - 0x8000) + : ((ud2 << 16) - 0x80000000); + /* li/lis + xoris */ + emit_move_insn (copy_rtx (temp), GEN_INT (imm)); + emit_move_insn (dest, gen_rtx_XOR (DImode, copy_rtx (temp), + GEN_INT (orig_c ^ imm))); + } else if (ud3 == 0 && ud4 == 0) { temp = !can_create_pseudo_p () ? dest : gen_reg_rtx (DImode); diff --git a/gcc/testsuite/gcc.target/powerpc/pr106708.c b/gcc/testsuite/gcc.target/powerpc/pr106708.c new file mode 100644 index 00000000000..6445fa47747 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr106708.c @@ -0,0 +1,10 @@ +/* PR target/106708 */ +/* { dg-options "-O2 -mdejagnu-cpu=power8" } */ +/* { dg-do compile { target has_arch_ppc64 } } */ + +#include "pr106708.h" + +/* { dg-final { scan-assembler-times {\mli\M} 2 } } */ +/* { dg-final { scan-assembler-times {\mlis\M} 1 } } */ +/* { dg-final { scan-assembler-times {\moris\M} 1 } } */ +/* { dg-final { scan-assembler-times {\mxoris\M} 2 } } */ diff --git a/gcc/testsuite/gcc.target/powerpc/pr106708.h b/gcc/testsuite/gcc.target/powerpc/pr106708.h new file mode 100644 index 00000000000..ad07eb30547 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr106708.h @@ -0,0 +1,9 @@ +/* li/lis + oris/xoris */ +void __attribute__ ((__noinline__, __noclone__)) foo (long long *arg) +{ + *arg++ = 0x98765432ULL; + *arg++ = 0xffffffff7cdeab55ULL; + *arg++ = 0xffffffff65430000ULL; +} + + diff --git a/gcc/testsuite/gcc.target/powerpc/pr106708_1.c b/gcc/testsuite/gcc.target/powerpc/pr106708_1.c new file mode 100644 index 00000000000..df65c321f6b --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr106708_1.c @@ -0,0 +1,17 @@ +/* PR target/106708 */ +/* { dg-do run } */ +/* { dg-options "-O2" } */ + +#include "pr106708.h" + +long long arr[] = {0x98765432ULL, 0xffffffff7cdeab55ULL, 0xffffffff65430000ULL}; +int +main () +{ + long long a[3]; + + foo (a); + if (__builtin_memcmp (a, arr, sizeof (arr)) != 0) + __builtin_abort (); + return 0; +}