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 EB2C038708F9; Tue,  2 Jun 2020 01:50:11 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EB2C038708F9
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1591062611;
 bh=lu+/PshRfr+QBzOQbdgjEUTlexLrus4xag1fY4Aij0o=;
 h=From:To:Subject:Date:From;
 b=b41PxUMQPjnzvbIsS1dPue3dWvJhKwvJTBhsC6An7/01JwmvaR6ofz5oKf9fVEW5r
 c3XLx6PsfFQrM+PUS/1+3ZBVAbtFAMgbjEY/NxdK+3t54MHXWe88qjDmpRYZbD/oUb
 MdkvhP5yfhgA3qInLaHbonTJ78lyoKMPDUODDtg4=
From: "evan@coeus-group.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/95471] New: vrndvq_f32 not supported on armv8
Date: Tue, 02 Jun 2020 01:50:11 +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: 9.2.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: evan@coeus-group.com
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 target_milestone
Message-ID: <bug-95471-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Jun 2020 01:50:12 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95471

            Bug ID: 95471
           Summary: vrndvq_f32 not supported on armv8
           Product: gcc
           Version: 9.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: evan@coeus-group.com
  Target Milestone: ---

With -march=3Darmv8-a -mfpu=3Dneon, arm_neon.h exposes vrndnq_f32, but the
intrinsic used to implement it (__builtin_neon_vrintnv4sf) emits an "error:
this builtin is not supported for this target".

Here is a trivial test case:

  #include <arm_neon.h>

  #if defined(__ARM_NEON)
  float32x4_t foo(float32x4_t a) {
    return vrndnq_f32(a);
  }
  #endif

On Compiler Explorer: https://godbolt.org/z/ThfJQe

Relevant documentation from ARM:
<https://developer.arm.com/architectures/instruction-sets/simd-isas/neon/in=
trinsics?search=3Dvrndnq_f32>.=