From nobody Sun Feb 8 21:47:41 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1554978726; cv=none; d=zoho.com; s=zohoarc; b=N8/LOjDTjf+0LZz0WyBNTO6SPd4xAykxZwhTQgrjGNW8xa9xhSW+GJHhe6sQQk6mtRzgoHTgLE0klkwX3HNicYil9rZI+vcV6xJKghDf4oFGk4CzVLsgBm4jtczAbLLipUfa2pqyfWvc92MKkD8uz5C648eqFsWvYp68yLEjVJ8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1554978726; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=sZ3d6nfwXs6wZm3XSZjBYl8Il5rgQYH+i1KxcKyU1qA=; b=OV7F8oOIj0ngGI3YQzMZb2Z9G/EDvkMULFrP6zN4Wh9+erGD862pPYT+HSRLK4kPAeWBi5Kb+utXpAelsaNsR/dmzwA5gyFkRey+d762Igdbq24v1e0VnP+eGCI9FcUrDGq6FWd3kltb2I5seXx0uY/UMI+EmumNl6XwSvrB7yQ= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1554978726705722.2580861802585; Thu, 11 Apr 2019 03:32:06 -0700 (PDT) Received: from localhost ([127.0.0.1]:45818 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hEWzv-0001au-LF for importer@patchew.org; Thu, 11 Apr 2019 06:31:59 -0400 Received: from eggs.gnu.org ([209.51.188.92]:54395) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hEWsB-0002Xe-T0 for qemu-devel@nongnu.org; Thu, 11 Apr 2019 06:24:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hEWek-0007hl-0j for qemu-devel@nongnu.org; Thu, 11 Apr 2019 06:10:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54976) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hEWej-0007hZ-L8; Thu, 11 Apr 2019 06:10:05 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E6298A77F; Thu, 11 Apr 2019 10:10:04 +0000 (UTC) Received: from t460s.redhat.com (unknown [10.36.118.43]) by smtp.corp.redhat.com (Postfix) with ESMTP id DEA921001E71; Thu, 11 Apr 2019 10:10:01 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Thu, 11 Apr 2019 12:08:32 +0200 Message-Id: <20190411100836.646-38-david@redhat.com> In-Reply-To: <20190411100836.646-1-david@redhat.com> References: <20190411100836.646-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 11 Apr 2019 10:10:04 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v1 37/41] s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-s390x@nongnu.org, Cornelia Huck , David Hildenbrand , Thomas Huth , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Reuse s390_vec_sub() to perform two 128-bit subtraction, calculating the borrow. Signed-off-by: David Hildenbrand Reviewed-by: Richard Henderson --- target/s390x/helper.h | 1 + target/s390x/insn-data.def | 2 ++ target/s390x/translate_vx.inc.c | 13 +++++++++++++ target/s390x/vec_int_helper.c | 16 ++++++++++++++++ 4 files changed, 32 insertions(+) diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 33e3e003f8..d040e4cd07 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -233,6 +233,7 @@ DEF_HELPER_FLAGS_4(gvec_vsrl, TCG_CALL_NO_RWG, void, pt= r, cptr, i64, i32) DEF_HELPER_FLAGS_4(gvec_vscbi8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i3= 2) DEF_HELPER_FLAGS_4(gvec_vscbi16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i= 32) DEF_HELPER_FLAGS_4(gvec_vscbi128, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, = i32) +DEF_HELPER_FLAGS_5(gvec_vsbcbi128, TCG_CALL_NO_RWG, void, ptr, cptr, cptr,= cptr, i32) =20 #ifndef CONFIG_USER_ONLY DEF_HELPER_3(servc, i32, env, i64, i64) diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index a60d8531dc..a8d90517f6 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -1180,6 +1180,8 @@ F(0xe7f5, VSCBI, VRR_c, V, 0, 0, 0, 0, vscbi, 0, IF_VEC) /* VECTOR SUBTRACT WITH BORROW INDICATION */ F(0xe7bf, VSBI, VRR_d, V, 0, 0, 0, 0, vsbi, 0, IF_VEC) +/* VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION */ + F(0xe7bd, VSBCBI, VRR_d, V, 0, 0, 0, 0, vsbcbi, 0, IF_VEC) =20 #ifndef CONFIG_USER_ONLY /* COMPARE AND SWAP AND PURGE */ diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.in= c.c index 3f60b97654..fd232ba6c3 100644 --- a/target/s390x/translate_vx.inc.c +++ b/target/s390x/translate_vx.inc.c @@ -2212,3 +2212,16 @@ static DisasJumpType op_vsbi(DisasContext *s, DisasO= ps *o) get_field(s->fields, v4)); return DISAS_NEXT; } + +static DisasJumpType op_vsbcbi(DisasContext *s, DisasOps *o) +{ + if (get_field(s->fields, m5) !=3D ES_128) { + gen_program_exception(s, PGM_SPECIFICATION); + return DISAS_NORETURN; + } + + gen_gvec_4_ool(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), get_field(s->fields, v4), 0, + gen_helper_gvec_vsbcbi128); + return DISAS_NEXT; +} diff --git a/target/s390x/vec_int_helper.c b/target/s390x/vec_int_helper.c index 699b399a26..95686e79fd 100644 --- a/target/s390x/vec_int_helper.c +++ b/target/s390x/vec_int_helper.c @@ -803,3 +803,19 @@ void HELPER(gvec_vscbi128)(void *v1, const void *v2, c= onst void *v3, dst->doubleword[0] =3D 0; dst->doubleword[1] =3D s390_vec_sub(&tmp, v2, v3); } + +void HELPER(gvec_vsbcbi128)(void *v1, const void *v2, const void *v3, + const void *v4, uint32_t desc) +{ + const S390Vector old_borrow =3D { + .doubleword[0] =3D 0, + .doubleword[1] =3D ((S390Vector *)v4)->doubleword[1] & 1, + }; + S390Vector tmp, *dst =3D v1; + bool borrow; + + borrow =3D s390_vec_sub(&tmp, v2, v3); + borrow |=3D s390_vec_sub(&tmp, &tmp, &old_borrow); + dst->doubleword[0] =3D 0; + dst->doubleword[1] =3D borrow; +} --=20 2.20.1