From patchwork Mon Aug 14 06:09:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tsukasa OI X-Patchwork-Id: 1820863 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=server2.sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=mW0QJDc/; dkim-atps=neutral Received: from server2.sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RPPDM4zsfz1yfZ for ; Mon, 14 Aug 2023 16:11:31 +1000 (AEST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id B55C038560A7 for ; Mon, 14 Aug 2023 06:11:29 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B55C038560A7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1691993489; bh=wyMbXITu1c406/0WIzbrcS/fvpL+LeC3AR9U5WY9wkk=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=mW0QJDc/YRPfJHj/boCvqBX4CNL29wmkmo0Mo3gx5Cii2j1MNVTGtLhSZ5CCZjbu3 G2n2Ukp87RrWJ84h8PAH67tiRXhk02DSQ6T0ZFUeFixFaNWnWTIaRfhuwbfeWKYPzd XoYBqysLuDL1imVunWOwAJJFK8QbY9uOSTwR+6f4= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mail-sender-0.a4lg.com (mail-sender.a4lg.com [153.120.152.154]) by sourceware.org (Postfix) with ESMTPS id 7017A3858C36 for ; Mon, 14 Aug 2023 06:10:29 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 7017A3858C36 Received: from [127.0.0.1] (localhost [127.0.0.1]) by mail-sender-0.a4lg.com (Postfix) with ESMTPSA id B2C8A300089; Mon, 14 Aug 2023 06:10:27 +0000 (UTC) To: Tsukasa OI , Kito Cheng , Palmer Dabbelt , Andrew Waterman , Jim Wilson , Jeff Law Cc: gcc-patches@gcc.gnu.org Subject: [PATCH v2 1/3] RISC-V: Add stub support for existing extensions (privileged) Date: Mon, 14 Aug 2023 06:09:51 +0000 Message-ID: In-Reply-To: References: Mime-Version: 1.0 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, GIT_PATCH_0, KAM_MANYTO, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Tsukasa OI via Gcc-patches From: Tsukasa OI Reply-To: Tsukasa OI Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" From: Tsukasa OI After commit c283c4774d1c ("RISC-V: Throw compilation error for unknown extensions") changed how do we handle unknown extensions, we have no guarantee that we can share the same architectural string with Binutils (specifically, the assembler). To avoid compilation errors on shared Assembler-C/C++ projects, GCC should support almost all extensions that Binutils support, even if the GCC does not touch a thing. As a start, this commit adds stub supported *privileged* extensions to riscv_ext_version_table and its implications to riscv_implied_info (all information is copied from Binutils' bfd/elfxx-riscv.c). gcc/ChangeLog: * common/config/riscv/riscv-common.cc (riscv_implied_info): Add implications from privileged extensions. (riscv_ext_version_table): Add stub support for all privileged extensions supported by Binutils. gcc/testsuite/ChangeLog: * gcc.target/riscv/predef-29.c: New test for a stub privileged extension 'Smstateen' with some implications. --- gcc/common/config/riscv/riscv-common.cc | 18 +++++++++++ gcc/testsuite/gcc.target/riscv/predef-29.c | 35 ++++++++++++++++++++++ 2 files changed, 53 insertions(+) create mode 100644 gcc/testsuite/gcc.target/riscv/predef-29.c diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc index 21f83f26371f..91b0316acfea 100644 --- a/gcc/common/config/riscv/riscv-common.cc +++ b/gcc/common/config/riscv/riscv-common.cc @@ -130,6 +130,14 @@ static const riscv_implied_info_t riscv_implied_info[] = {"zhinx", "zhinxmin"}, {"zhinxmin", "zfinx"}, + {"smaia", "ssaia"}, + {"smstateen", "ssstateen"}, + {"smepmp", "zicsr"}, + {"ssaia", "zicsr"}, + {"sscofpmf", "zicsr"}, + {"ssstateen", "zicsr"}, + {"sstc", "zicsr"}, + {NULL, NULL} }; @@ -264,8 +272,18 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"zmmul", ISA_SPEC_CLASS_NONE, 1, 0}, + {"smaia", ISA_SPEC_CLASS_NONE, 1, 0}, + {"smepmp", ISA_SPEC_CLASS_NONE, 1, 0}, + {"smstateen", ISA_SPEC_CLASS_NONE, 1, 0}, + + {"ssaia", ISA_SPEC_CLASS_NONE, 1, 0}, + {"sscofpmf", ISA_SPEC_CLASS_NONE, 1, 0}, + {"ssstateen", ISA_SPEC_CLASS_NONE, 1, 0}, + {"sstc", ISA_SPEC_CLASS_NONE, 1, 0}, + {"svinval", ISA_SPEC_CLASS_NONE, 1, 0}, {"svnapot", ISA_SPEC_CLASS_NONE, 1, 0}, + {"svpbmt", ISA_SPEC_CLASS_NONE, 1, 0}, {"xtheadba", ISA_SPEC_CLASS_NONE, 1, 0}, {"xtheadbb", ISA_SPEC_CLASS_NONE, 1, 0}, diff --git a/gcc/testsuite/gcc.target/riscv/predef-29.c b/gcc/testsuite/gcc.target/riscv/predef-29.c new file mode 100644 index 000000000000..61c6429be558 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/predef-29.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-march=rv64i_smstateen -mabi=lp64 -mcmodel=medlow -misa-spec=20191213" } */ + +int main () { + +#ifndef __riscv_arch_test +#error "__riscv_arch_test" +#endif + +#if __riscv_xlen != 64 +#error "__riscv_xlen" +#endif + +#if !defined(__riscv_i) || (__riscv_i != (2 * 1000 * 1000 + 1 * 1000)) +#error "__riscv_i" +#endif + +#if defined(__riscv_e) +#error "__riscv_e" +#endif + +#if !defined(__riscv_zicsr) +#error "__riscv_zicsr" +#endif + +#if !defined(__riscv_smstateen) +#error "__riscv_smstateen" +#endif + +#if !defined(__riscv_ssstateen) +#error "__riscv_ssstateen" +#endif + + return 0; +} From patchwork Mon Aug 14 06:09:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tsukasa OI X-Patchwork-Id: 1820864 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=8.43.85.97; helo=server2.sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=sMtYDZzv; dkim-atps=neutral Received: from server2.sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RPPFQ5wQMz1yfZ for ; 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Mon, 14 Aug 2023 06:10:38 +0000 (UTC) To: Tsukasa OI , Kito Cheng , Palmer Dabbelt , Andrew Waterman , Jim Wilson , Jeff Law Cc: gcc-patches@gcc.gnu.org Subject: [PATCH v2 2/3] RISC-V: Add stub support for existing extensions (vendor) Date: Mon, 14 Aug 2023 06:09:52 +0000 Message-ID: <0404a8f4c12a3a2798f0ca18313949b9f268d305.1691993380.git.research_trasio@irq.a4lg.com> In-Reply-To: References: Mime-Version: 1.0 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, GIT_PATCH_0, KAM_MANYTO, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Tsukasa OI via Gcc-patches From: Tsukasa OI Reply-To: Tsukasa OI Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" From: Tsukasa OI After commit c283c4774d1c ("RISC-V: Throw compilation error for unknown extensions") changed how do we handle unknown extensions, we have no guarantee that we can share the same architectural string with Binutils (specifically, the assembler). To avoid compilation errors on shared Assembler-C/C++ projects, GCC should support almost all extensions that Binutils support, even if the GCC does not touch a thing. This commit adds stub supported vendor extensions to riscv_ext_version_table (no riscv_implied_info entries to add; all information is copied from Binutils' bfd/elfxx-riscv.c). gcc/ChangeLog: * common/config/riscv/riscv-common.cc (riscv_ext_version_table): Add stub support for all vendor extensions supported by Binutils. gcc/testsuite/ChangeLog: * gcc.target/riscv/predef-30.c: New test for a stub vendor extension 'XVentanaCondOps'. --- gcc/common/config/riscv/riscv-common.cc | 2 ++ gcc/testsuite/gcc.target/riscv/predef-30.c | 27 ++++++++++++++++++++++ 2 files changed, 29 insertions(+) create mode 100644 gcc/testsuite/gcc.target/riscv/predef-30.c diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc index 91b0316acfea..0c351105e015 100644 --- a/gcc/common/config/riscv/riscv-common.cc +++ b/gcc/common/config/riscv/riscv-common.cc @@ -298,6 +298,8 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"xtheadmempair", ISA_SPEC_CLASS_NONE, 1, 0}, {"xtheadsync", ISA_SPEC_CLASS_NONE, 1, 0}, + {"xventanacondops", ISA_SPEC_CLASS_NONE, 1, 0}, + /* Terminate the list. */ {NULL, ISA_SPEC_CLASS_NONE, 0, 0} }; diff --git a/gcc/testsuite/gcc.target/riscv/predef-30.c b/gcc/testsuite/gcc.target/riscv/predef-30.c new file mode 100644 index 000000000000..9784b9ce5033 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/predef-30.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-march=rv64i_xventanacondops -mabi=lp64 -mcmodel=medlow -misa-spec=20191213" } */ + +int main () { + +#ifndef __riscv_arch_test +#error "__riscv_arch_test" +#endif + +#if __riscv_xlen != 64 +#error "__riscv_xlen" +#endif + +#if !defined(__riscv_i) || (__riscv_i != (2 * 1000 * 1000 + 1 * 1000)) +#error "__riscv_i" +#endif + +#if defined(__riscv_e) +#error "__riscv_e" +#endif + +#if !defined(__riscv_xventanacondops) +#error "__riscv_xventanacondops" +#endif + + return 0; +} From patchwork Mon Aug 14 06:09:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tsukasa OI X-Patchwork-Id: 1820862 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=server2.sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=S0ZiOq4A; dkim-atps=neutral Received: from server2.sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RPPD153jNz1yfZ for ; Mon, 14 Aug 2023 16:11:13 +1000 (AEST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 2FE073858028 for ; Mon, 14 Aug 2023 06:11:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2FE073858028 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1691993471; bh=kqEnJXrLO7yIguohWhCrk3AyRSjoVDg2yT0qpjqNEFE=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=S0ZiOq4AG2I/rC7GRKtqSFwhXz1CP3mhRMfS9Vf6Gt0uoEB2kl+DZh8POwZtNMyrC UGxdBe02jpnrf4+dDeLam26YW7wrTEBmYgmovXANolOy68LRRjedC3p8ncUVuH2Vlu 6tmOJmJjMayj5ZZCnzNEqma/A4d1EcGPbICJacso= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mail-sender-0.a4lg.com (mail-sender.a4lg.com [153.120.152.154]) by sourceware.org (Postfix) with ESMTPS id 8028A385700C for ; Mon, 14 Aug 2023 06:10:51 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 8028A385700C Received: from [127.0.0.1] (localhost [127.0.0.1]) by mail-sender-0.a4lg.com (Postfix) with ESMTPSA id 3CE68300089; Mon, 14 Aug 2023 06:10:49 +0000 (UTC) To: Tsukasa OI , Kito Cheng , Palmer Dabbelt , Andrew Waterman , Jim Wilson , Jeff Law Cc: gcc-patches@gcc.gnu.org Subject: [PATCH v2 3/3] RISC-V: Add stub support for existing extensions (unprivileged) Date: Mon, 14 Aug 2023 06:09:53 +0000 Message-ID: <3091a5d106d2d8256723c6a74f08f8607c9f019f.1691993380.git.research_trasio@irq.a4lg.com> In-Reply-To: References: Mime-Version: 1.0 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, GIT_PATCH_0, KAM_MANYTO, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Tsukasa OI via Gcc-patches From: Tsukasa OI Reply-To: Tsukasa OI Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" From: Tsukasa OI After commit c283c4774d1c ("RISC-V: Throw compilation error for unknown extensions") changed how do we handle unknown extensions, we have no guarantee that we can share the same architectural string with Binutils (specifically, the assembler). To avoid compilation errors on shared Assembler-C/C++ projects, GCC should support almost all extensions that Binutils support, even if the GCC does not touch a thing. This commit adds stub supported standard unprivileged extensions to riscv_ext_version_table and its implications to riscv_implied_info (all information is copied from Binutils' bfd/elfxx-riscv.c except not yet merged 'Zce', 'Zcmp' and 'Zcmt' support). gcc/ChangeLog: * common/config/riscv/riscv-common.cc (riscv_implied_info): Add implications from unprivileged extensions. (riscv_ext_version_table): Add stub support for all unprivileged extensions supported by Binutils as well as 'Zce', 'Zcmp', 'Zcmt'. gcc/testsuite/ChangeLog: * gcc.target/riscv/predef-31.c: New test for a stub unprivileged extension 'Zcb' with some implications. --- gcc/common/config/riscv/riscv-common.cc | 24 +++++++++++++++++ gcc/testsuite/gcc.target/riscv/predef-31.c | 31 ++++++++++++++++++++++ 2 files changed, 55 insertions(+) create mode 100644 gcc/testsuite/gcc.target/riscv/predef-31.c diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc index 0c351105e015..27e9072899bf 100644 --- a/gcc/common/config/riscv/riscv-common.cc +++ b/gcc/common/config/riscv/riscv-common.cc @@ -121,6 +121,20 @@ static const riscv_implied_info_t riscv_implied_info[] = {"zvksg", "zvks"}, {"zvksg", "zvkg"}, + {"zcb", "zca"}, + {"zcd", "zca"}, + {"zcd", "d"}, + {"zcf", "zca"}, + {"zcf", "f"}, + {"zce", "zca"}, + {"zce", "zcb"}, + {"zce", "zcmp"}, + {"zce", "zcmt"}, + {"zcmp", "zca"}, + {"zcmt", "zca"}, + {"zcmt", "zcicsr"}, + + {"zfa", "f"}, {"zfh", "zfhmin"}, {"zfhmin", "f"}, {"zvfhmin", "zve32f"}, @@ -197,6 +211,14 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"zawrs", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zca", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zcb", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zce", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zcmp", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zcmt", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zcd", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zcf", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zba", ISA_SPEC_CLASS_NONE, 1, 0}, {"zbb", ISA_SPEC_CLASS_NONE, 1, 0}, {"zbc", ISA_SPEC_CLASS_NONE, 1, 0}, @@ -219,6 +241,7 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"zkt", ISA_SPEC_CLASS_NONE, 1, 0}, {"zihintntl", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zihintpause", ISA_SPEC_CLASS_NONE, 2, 0}, {"zicboz",ISA_SPEC_CLASS_NONE, 1, 0}, {"zicbom",ISA_SPEC_CLASS_NONE, 1, 0}, @@ -265,6 +288,7 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"zvl32768b", ISA_SPEC_CLASS_NONE, 1, 0}, {"zvl65536b", ISA_SPEC_CLASS_NONE, 1, 0}, + {"zfa", ISA_SPEC_CLASS_NONE, 0, 1}, {"zfh", ISA_SPEC_CLASS_NONE, 1, 0}, {"zfhmin", ISA_SPEC_CLASS_NONE, 1, 0}, {"zvfhmin", ISA_SPEC_CLASS_NONE, 1, 0}, diff --git a/gcc/testsuite/gcc.target/riscv/predef-31.c b/gcc/testsuite/gcc.target/riscv/predef-31.c new file mode 100644 index 000000000000..4ea11442f995 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/predef-31.c @@ -0,0 +1,31 @@ +/* { dg-do compile } */ +/* { dg-options "-march=rv64i_zcb -mabi=lp64 -mcmodel=medlow -misa-spec=20191213" } */ + +int main () { + +#ifndef __riscv_arch_test +#error "__riscv_arch_test" +#endif + +#if __riscv_xlen != 64 +#error "__riscv_xlen" +#endif + +#if !defined(__riscv_i) || (__riscv_i != (2 * 1000 * 1000 + 1 * 1000)) +#error "__riscv_i" +#endif + +#if defined(__riscv_e) +#error "__riscv_e" +#endif + +#if !defined(__riscv_zca) +#error "__riscv_zca" +#endif + +#if !defined(__riscv_zcb) +#error "__riscv_zcb" +#endif + + return 0; +}