From nobody Mon Feb 9 20:10:05 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.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=git.sr.ht Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1651563658535623.4218830308247; Tue, 3 May 2022 00:40:58 -0700 (PDT) Received: from localhost ([::1]:39548 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nln9V-0000ce-A5 for importer@patchew.org; Tue, 03 May 2022 03:40:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51148) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nlmjO-0007CX-8r; Tue, 03 May 2022 03:13:58 -0400 Received: from mail-b.sr.ht ([173.195.146.151]:43890) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nlmjM-0000yA-50; Tue, 03 May 2022 03:13:57 -0400 Received: from git.sr.ht (unknown [173.195.146.142]) by mail-b.sr.ht (Postfix) with ESMTPSA id 0E13E11F0D3; Tue, 3 May 2022 07:13:51 +0000 (UTC) Authentication-Results: mail-b.sr.ht; dkim=none From: ~eopxd Date: Mon, 07 Mar 2022 01:43:53 -0800 Subject: [PATCH qemu v14 08/15] target/riscv: rvv: Add tail agnostic for vector integer comparison instructions Message-ID: <165156202959.27941.9731161369415852149-8@git.sr.ht> X-Mailer: git.sr.ht In-Reply-To: <165156202959.27941.9731161369415852149-0@git.sr.ht> To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Bin Meng , Frank Chang , WeiWei Li , eop Chen Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=173.195.146.151; envelope-from=outgoing@sr.ht; helo=mail-b.sr.ht X-Spam_score_int: 36 X-Spam_score: 3.6 X-Spam_bar: +++ X-Spam_report: (3.6 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_96_XX=3.405, FREEMAIL_FORGED_REPLYTO=2.095, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: ~eopxd Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1651563658984100001 From: eopXD Compares write mask registers, and so always operate under a tail- agnostic policy. Signed-off-by: eop Chen Reviewed-by: Frank Chang Reviewed-by: Weiwei Li Acked-by: Alistair Francis --- target/riscv/vector_helper.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index c1ae2ea2f1..ddaf364573 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -1373,6 +1373,8 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void= *vs2, \ { \ uint32_t vm =3D vext_vm(desc); \ uint32_t vl =3D env->vl; \ + uint32_t total_elems =3D env_archcpu(env)->cfg.vlen; \ + uint32_t vta_all_1s =3D vext_vta_all_1s(desc); \ uint32_t i; \ \ for (i =3D env->vstart; i < vl; i++) { \ @@ -1384,6 +1386,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, voi= d *vs2, \ vext_set_elem_mask(vd, i, DO_OP(s2, s1)); \ } \ env->vstart =3D 0; \ + /* mask destination register are always tail-agnostic */ \ + /* set tail elements to 1s */ \ + if (vta_all_1s) { \ + for (; i < total_elems; i++) { \ + vext_set_elem_mask(vd, i, 1); \ + } \ + } \ } =20 GEN_VEXT_CMP_VV(vmseq_vv_b, uint8_t, H1, DO_MSEQ) @@ -1422,6 +1431,8 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1= , void *vs2, \ { \ uint32_t vm =3D vext_vm(desc); \ uint32_t vl =3D env->vl; \ + uint32_t total_elems =3D env_archcpu(env)->cfg.vlen; \ + uint32_t vta_all_1s =3D vext_vta_all_1s(desc); \ uint32_t i; \ \ for (i =3D env->vstart; i < vl; i++) { \ @@ -1433,6 +1444,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s= 1, void *vs2, \ DO_OP(s2, (ETYPE)(target_long)s1)); \ } \ env->vstart =3D 0; \ + /* mask destination register are always tail-agnostic */ \ + /* set tail elements to 1s */ \ + if (vta_all_1s) { \ + for (; i < total_elems; i++) { \ + vext_set_elem_mask(vd, i, 1); \ + } \ + } \ } =20 GEN_VEXT_CMP_VX(vmseq_vx_b, uint8_t, H1, DO_MSEQ) --=20 2.34.2