From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id B4D2F3858C2F; Sat, 24 Sep 2022 08:41:10 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B4D2F3858C2F
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1664008870;
	bh=DxZhHg0SsNHH6tb98EfqTYD7ruW4mm+Vj0YTA9+7EIE=;
	h=From:To:Subject:Date:From;
	b=NwTd6Mk8YYKOXIZwNdiasbqZtEObmm37FkyltC6UX+ZXd9UXGY64z5J/hrDB9IklM
	 0KyRX8sc5fU/KAkHg2Wryn0+e270YPu5C7hE1oIPIo4W1bz1dWh6Yh720jr4ffblnI
	 asNtowc7z+VQUBedpLt9069YF0ZlNyjWmenXvTZc=
From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/107025] New: gas doesn't accept code produced by
 -mcpu=thunderx3t110
Date: Sat, 24 Sep 2022 08:41:09 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rsandifo at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter cc target_milestone
 cf_gcctarget
Message-ID: <bug-107025-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107025

            Bug ID: 107025
           Summary: gas doesn't accept code produced by
                    -mcpu=3Dthunderx3t110
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rsandifo at gcc dot gnu.org
                CC: ktkachov at gcc dot gnu.org, pinskia at gcc dot gnu.org,
                    rearnsha at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64*-*-*

Compiling:

void foo (_Atomic int *ptr) { ptr[1] =3D 1; }

with -O2 -mcpu=3Dthunderx3t110 produces:

Error: selected processor does not support `stlur w1,[x0,4]'

This is because thunderx3t110 is listed as an Armv8.3-A core,
but includes the Armv8.4-A RCPC extension:

AARCH64_CORE("thunderx3t110",  thunderx3t110,  thunderx3t110, V8_3A,=20
AARCH64_F\
L_CRYPTO | AARCH64_FL_RCPC | AARCH64_FL_SM4 | AARCH64_FL_SHA3 |
AARCH64_FL_F16F\
ML | AARCH64_FL_RCPC8_4, thunderx3t110, 0x43, 0x0b8, 0x0a)

This extension doesn't have its own separate feature flag in
gcc, gas, or clang.  I guess the options are to add one or
to remove the AARCH64_FL_RCPC8_4 entry.=