From nobody Mon Nov 10 11:19:30 2025 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=1555442374; cv=none; d=zoho.com; s=zohoarc; b=nzEYiyXpBEEep0n5Ld1OY+BlAD781UXO/vBxjqFTSu9SqPAyuJJP/rwM77PD5QrLaiq5W7lyNn5KmhOC0v2BwoArqO6BBgzZpfvyWMQHlRxRb933m2DplYUBj9/DDgslL/58LEv4u38IWPLvUgcavHZnS0A17AXUccPuAzRyuvM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1555442374; 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=kYTeg/dGjIiaf2k3wn1artULqDTui0lkWBEmCMiOOrc=; b=UWTetDfFreUhzxLW7mpqlw5Nw05496qwF/V3ygrI77UGXJndDFqhgDaTxIya2CUNPW86hzJBD/3uItsbO1/MvHuf1ICpw8fyXBWEsI0UpKKo652T+g4ClkGCNvT0lEvCfXKdcpEU88MJtSN2E1bx5tK4NzLYnrpoF194BzVQ+7w= 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 1555442374841656.7376904186856; Tue, 16 Apr 2019 12:19:34 -0700 (PDT) Received: from localhost ([127.0.0.1]:41470 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hGTcB-0001A1-QJ for importer@patchew.org; Tue, 16 Apr 2019 15:19:31 -0400 Received: from eggs.gnu.org ([209.51.188.92]:55315) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hGTDx-0005ef-BV for qemu-devel@nongnu.org; Tue, 16 Apr 2019 14:54:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hGTDw-0006I8-B0 for qemu-devel@nongnu.org; Tue, 16 Apr 2019 14:54:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42894) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hGTDw-0006Gq-1X; Tue, 16 Apr 2019 14:54:28 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4A7898665D; Tue, 16 Apr 2019 18:54:27 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-105.ams2.redhat.com [10.36.116.105]) by smtp.corp.redhat.com (Postfix) with ESMTP id BA9BB5D707; Tue, 16 Apr 2019 18:54:25 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Tue, 16 Apr 2019 20:52:56 +0200 Message-Id: <20190416185301.25344-37-david@redhat.com> In-Reply-To: <20190416185301.25344-1-david@redhat.com> References: <20190416185301.25344-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 16 Apr 2019 18:54:27 +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 v2 36/41] s390x/tcg: Implement VECTOR SUBTRACT WITH 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: Thomas Huth , David Hildenbrand , Cornelia Huck , Richard Henderson , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Fairly easy as only 128-bit handling is required. Simply perform the subtraction and then subtract the borrow. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/insn-data.def | 2 ++ target/s390x/translate_vx.inc.c | 26 ++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index 94de3c9c7d..a60d8531dc 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -1178,6 +1178,8 @@ F(0xe7f7, VS, VRR_c, V, 0, 0, 0, 0, vs, 0, IF_VEC) /* VECTOR SUBTRACT COMPUTE BORROW INDICATION */ 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) =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 8e51b6e607..794588ae96 100644 --- a/target/s390x/translate_vx.inc.c +++ b/target/s390x/translate_vx.inc.c @@ -2245,3 +2245,29 @@ static DisasJumpType op_vscbi(DisasContext *s, Disas= Ops *o) get_field(s->fields, v3), &g[es]); return DISAS_NEXT; } + +static void gen_sbi2_i64(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 al, TCGv_i64 a= h, + TCGv_i64 bl, TCGv_i64 bh, TCGv_i64 cl, TCGv_i64 c= h) +{ + TCGv_i64 tl =3D tcg_temp_new_i64(); + TCGv_i64 zero =3D tcg_const_i64(0); + + tcg_gen_andi_i64(tl, cl, 1); + tcg_gen_sub2_i64(dl, dh, al, ah, bl, bh); + tcg_gen_sub2_i64(dl, dh, dl, dh, tl, zero); + tcg_temp_free_i64(tl); + tcg_temp_free_i64(zero); +} + +static DisasJumpType op_vsbi(DisasContext *s, DisasOps *o) +{ + if (get_field(s->fields, m5) !=3D ES_128) { + gen_program_exception(s, PGM_SPECIFICATION); + return DISAS_NORETURN; + } + + gen_gvec128_4_i64(gen_sbi2_i64, get_field(s->fields, v1), + get_field(s->fields, v2), get_field(s->fields, v3), + get_field(s->fields, v4)); + return DISAS_NEXT; +} --=20 2.20.1