From patchwork Wed Oct 6 21:28:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?RnLDqWTDqXJpYyBQw6l0cm90?= X-Patchwork-Id: 1537437 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4HPpFP45J4z9sXS for ; Thu, 7 Oct 2021 08:56:41 +1100 (AEDT) Received: from localhost ([::1]:50104 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mYEtz-00077L-Ad for incoming@patchwork.ozlabs.org; Wed, 06 Oct 2021 17:56:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49852) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mYEUa-0000J6-TN; Wed, 06 Oct 2021 17:30:25 -0400 Received: from zm-mta-out-3.u-ga.fr ([152.77.200.56]:44124) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mYEUV-0008Ox-HM; Wed, 06 Oct 2021 17:30:24 -0400 Received: from mailhost.u-ga.fr (mailhost2.u-ga.fr [129.88.177.242]) by zm-mta-out-3.u-ga.fr (Postfix) with ESMTP id D99AF41EB0; Wed, 6 Oct 2021 23:29:43 +0200 (CEST) Received: from smtps.univ-grenoble-alpes.fr (smtps2.u-ga.fr [152.77.18.2]) by mailhost.u-ga.fr (Postfix) with ESMTP id C3CC060066; Wed, 6 Oct 2021 23:29:43 +0200 (CEST) Received: from palmier.tima.u-ga.fr (35.201.90.79.rev.sfr.net [79.90.201.35]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: petrotf@univ-grenoble-alpes.fr) by smtps.univ-grenoble-alpes.fr (Postfix) with ESMTPSA id 9045F14005C; Wed, 6 Oct 2021 23:29:43 +0200 (CEST) From: =?utf-8?b?RnLDqWTDqXJpYyBQw6l0cm90?= To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v2 23/27] target/riscv: helper functions to wrap calls to 128-bit csr insns Date: Wed, 6 Oct 2021 23:28:29 +0200 Message-Id: <20211006212833.108706-24-frederic.petrot@univ-grenoble-alpes.fr> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211006212833.108706-1-frederic.petrot@univ-grenoble-alpes.fr> References: <20211006212833.108706-1-frederic.petrot@univ-grenoble-alpes.fr> MIME-Version: 1.0 X-Greylist: Whitelist-UGA SMTP Authentifie (petrotf@univ-grenoble-alpes.fr) via submission-587 ACL (41) X-Greylist: Whitelist-UGA MAILHOST (SMTP non authentifie) depuis 152.77.18.2 Received-SPF: pass client-ip=152.77.200.56; envelope-from=frederic.petrot@univ-grenoble-alpes.fr; helo=zm-mta-out-3.u-ga.fr 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_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-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: bin.meng@windriver.com, richard.henderson@linaro.org, alistair.francis@wdc.com, fabien.portas@grenoble-inp.org, palmer@dabbelt.com, =?utf-8?b?RnLDqWTDqXJpYyBQw6l0cm90?= , philmd@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Given the side effects they have, the csr instructions are realized as helpers. We extend this existing infrastructure for 128-bit sized csr. We have a slight issue with returning 128-bit values: we use the globals we added to support div/rem insns to that end. Theses helpers all call a unique function that is currently a stub. The trans_csrxx functions supporting 128-bit are yet to be implemented. Signed-off-by: Frédéric Pétrot Co-authored-by: Fabien Portas --- target/riscv/cpu.h | 4 ++++ target/riscv/helper.h | 3 +++ target/riscv/csr.c | 7 +++++++ target/riscv/op_helper.c | 44 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 58 insertions(+) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index a2d7d65efb..911fdc4ecf 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -506,6 +506,10 @@ typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, target_ulong new_value, target_ulong write_mask); +RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno, + Int128 *ret_value, + Int128 new_value, Int128 write_mask); + typedef struct { const char *name; riscv_csr_predicate_fn predicate; diff --git a/target/riscv/helper.h b/target/riscv/helper.h index 01d885d566..d1176649f1 100644 --- a/target/riscv/helper.h +++ b/target/riscv/helper.h @@ -68,6 +68,9 @@ DEF_HELPER_FLAGS_2(gorcw, TCG_CALL_NO_RWG_SE, tl, tl, tl) DEF_HELPER_2(csrr, tl, env, int) DEF_HELPER_3(csrw, void, env, int, tl) DEF_HELPER_4(csrrw, tl, env, int, tl, tl) +DEF_HELPER_2(csrr_i128, void, env, int) +DEF_HELPER_4(csrw_i128, void, env, int, tl, tl) +DEF_HELPER_6(csrrw_i128, void, env, int, tl, tl, tl, tl) #ifndef CONFIG_USER_ONLY DEF_HELPER_2(sret, tl, env, tl) DEF_HELPER_2(mret, tl, env, tl) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 23fbbd3216..9529119238 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -1492,6 +1492,13 @@ RISCVException riscv_csrrw(CPURISCVState *env, int csrno, return RISCV_EXCP_NONE; } +RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno, + Int128 *ret_value, + Int128 new_value, Int128 write_mask) +{ + return RISCV_EXCP_ILLEGAL_INST; +} + /* * Debugger support. If not in user mode, set env->debugger before the * riscv_csrrw call and clear it after the call. diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index ee7c24efe7..753eb35000 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -69,6 +69,50 @@ target_ulong helper_csrrw(CPURISCVState *env, int csr, return val; } +void helper_csrr_i128(CPURISCVState *env, int csr) +{ + Int128 rv = int128_zero(); + RISCVException ret = riscv_csrrw_i128(env, csr, &rv, + int128_zero(), + int128_zero()); + + if (ret != RISCV_EXCP_NONE) { + riscv_raise_exception(env, ret, GETPC()); + } + + env->hlpr[0] = int128_getlo(rv); + env->hlpr[1] = int128_gethi(rv); +} + +void helper_csrw_i128(CPURISCVState *env, int csr, + target_ulong srcl, target_ulong srch) +{ + RISCVException ret = riscv_csrrw_i128(env, csr, NULL, + int128_make128(srcl, srch), + UINT128_MAX); + + if (ret != RISCV_EXCP_NONE) { + riscv_raise_exception(env, ret, GETPC()); + } +} + +void helper_csrrw_i128(CPURISCVState *env, int csr, + target_ulong srcl, target_ulong srch, + target_ulong maskl, target_ulong maskh) +{ + Int128 rv = int128_zero(); + RISCVException ret = riscv_csrrw_i128(env, csr, &rv, + int128_make128(srcl, srch), + int128_make128(maskl, maskh)); + + if (ret != RISCV_EXCP_NONE) { + riscv_raise_exception(env, ret, GETPC()); + } + + env->hlpr[0] = int128_getlo(rv); + env->hlpr[1] = int128_gethi(rv); +} + #ifndef CONFIG_USER_ONLY target_ulong helper_sret(CPURISCVState *env, target_ulong cpu_pc_deb)