From nobody Tue Feb 10 11:58:01 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1628132497516494.9883759206791; Wed, 4 Aug 2021 20:01:37 -0700 (PDT) Received: from localhost ([::1]:49530 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mBTdX-00018f-Vh for importer@patchew.org; Wed, 04 Aug 2021 23:01:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48180) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBTbg-0006sB-OI; Wed, 04 Aug 2021 22:59:40 -0400 Received: from out28-197.mail.aliyun.com ([115.124.28.197]:42927) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBTbe-0000SN-Rq; Wed, 04 Aug 2021 22:59:40 -0400 Received: from roman-VirtualBox.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.KvYYLWy_1628132374) by smtp.aliyun-inc.com(10.147.43.230); Thu, 05 Aug 2021 10:59:34 +0800 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.07594667|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_alarm|0.0254385-0.000642626-0.973919; FP=0|0|0|0|0|-1|-1|-1; HT=ay29a033018047211; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=7; RT=7; SR=0; TI=SMTPD_---.KvYYLWy_1628132374; From: LIU Zhiwei To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [RFC PATCH 09/13] target/riscv: Support UXL32 for atomic instructions Date: Thu, 5 Aug 2021 10:53:08 +0800 Message-Id: <20210805025312.15720-10-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210805025312.15720-1-zhiwei_liu@c-sky.com> References: <20210805025312.15720-1-zhiwei_liu@c-sky.com> 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: none client-ip=115.124.28.197; envelope-from=zhiwei_liu@c-sky.com; helo=out28-197.mail.aliyun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: palmer@dabbelt.com, richard.henderson@linaro.org, bin.meng@windriver.com, Alistair.Francis@wdc.com, LIU Zhiwei Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1628132498808100001 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Only load or store 32 bits data for atomic instructions when UXL32. Signed-off-by: LIU Zhiwei --- target/riscv/insn_trans/trans_rva.c.inc | 36 ++++++++++++++++++++----- 1 file changed, 30 insertions(+), 6 deletions(-) diff --git a/target/riscv/insn_trans/trans_rva.c.inc b/target/riscv/insn_tr= ans/trans_rva.c.inc index 5bb5bbd09c..07c94416e5 100644 --- a/target/riscv/insn_trans/trans_rva.c.inc +++ b/target/riscv/insn_trans/trans_rva.c.inc @@ -20,12 +20,19 @@ =20 static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop) { - TCGv src1 =3D gpr_src(ctx, a->rs1); + TCGv src1 =3D gpr_src_u(ctx, a->rs1); =20 /* Put addr in load_res, data in load_val. */ if (a->rl) { tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL); } + if (ctx->uxl32) { + TCGv_i32 val =3D tcg_temp_new_i32(); + tcg_gen_qemu_ld_i32(val, src1, ctx->mem_idx, mop); + tcg_gen_extu_i32_tl(load_val, val); + } else { + tcg_gen_qemu_ld_tl(load_val, src1, ctx->mem_idx, mop); + } tcg_gen_qemu_ld_tl(load_val, src1, ctx->mem_idx, mop); if (a->aq) { tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ); @@ -39,8 +46,8 @@ static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemO= p mop) static bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop) { TCGv dest =3D gpr_dst(ctx, a->rd); - TCGv src1 =3D gpr_src(ctx, a->rs1); - TCGv src2 =3D gpr_src(ctx, a->rs2); + TCGv src1 =3D gpr_src_u(ctx, a->rs1); + TCGv src2 =3D gpr_src_u(ctx, a->rs2); TCGLabel *l1 =3D gen_new_label(); TCGLabel *l2 =3D gen_new_label(); =20 @@ -50,8 +57,25 @@ static bool gen_sc(DisasContext *ctx, arg_atomic *a, Mem= Op mop) * Note that the TCG atomic primitives are SC, * so we can ignore AQ/RL along this path. */ - tcg_gen_atomic_cmpxchg_tl(dest, load_res, load_val, src2, - ctx->mem_idx, mop); + if (ctx->uxl32) { + TCGv_i32 retv, cmpv, newv; + retv =3D tcg_temp_new_i32(); + cmpv =3D tcg_temp_new_i32(); + newv =3D tcg_temp_new_i32(); + tcg_gen_trunc_tl_i32(cmpv, load_val); + tcg_gen_trunc_tl_i32(newv, src2); + + tcg_gen_atomic_cmpxchg_i32(retv, load_res, cmpv, newv, + ctx->mem_idx, mop); + + tcg_gen_extu_i32_tl(dest, retv); + tcg_temp_free_i32(retv); + tcg_temp_free_i32(cmpv); + tcg_temp_free_i32(newv); + } else { + tcg_gen_atomic_cmpxchg_tl(dest, load_res, load_val, src2, + ctx->mem_idx, mop); + } tcg_gen_setcond_tl(TCG_COND_NE, dest, dest, load_val); tcg_gen_br(l2); =20 @@ -78,7 +102,7 @@ static bool gen_amo(DisasContext *ctx, arg_atomic *a, MemOp mop) { TCGv dest =3D gpr_dst(ctx, a->rd); - TCGv src1 =3D gpr_src(ctx, a->rs1); + TCGv src1 =3D gpr_src_u(ctx, a->rs1); TCGv src2 =3D gpr_src(ctx, a->rs2); =20 (*func)(dest, src1, src2, ctx->mem_idx, mop); --=20 2.17.1