From patchwork Wed Jan 23 09:25:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 10776889 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A071714E5 for ; Wed, 23 Jan 2019 09:56:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F5942AC14 for ; Wed, 23 Jan 2019 09:56:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 83A1B2B440; Wed, 23 Jan 2019 09:56:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7BE5C2AC14 for ; Wed, 23 Jan 2019 09:56:03 +0000 (UTC) Received: from localhost ([127.0.0.1]:59248 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmFGM-0004HW-Ma for patchwork-qemu-devel@patchwork.kernel.org; Wed, 23 Jan 2019 04:56:02 -0500 Received: from eggs.gnu.org ([209.51.188.92]:46954) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmF4R-0002Ay-5V for qemu-devel@nongnu.org; Wed, 23 Jan 2019 04:43:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gmEon-0007vt-S2 for qemu-devel@nongnu.org; Wed, 23 Jan 2019 04:27:39 -0500 Received: from mail.uni-paderborn.de ([131.234.142.9]:50530) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gmEoc-0007VJ-E4; Wed, 23 Jan 2019 04:27:29 -0500 Received: from wormulon.uni-paderborn.de ([131.234.189.22] helo=localhost.localdomain) by mail.uni-paderborn.de with esmtp (Exim 4.89 amazonia) id 1gmEoF-0006Yz-9f; Wed, 23 Jan 2019 10:27:00 +0100 Received: from mail.uni-paderborn.de by wormulon with queue id 3103320-5; Wed, 23 Jan 2019 09:26:58 GMT X-Envelope-From: From: Bastian Koppelmann To: sagark@eecs.berkeley.edu, palmer@sifive.com, kbastian@mail.uni-paderborn.de Date: Wed, 23 Jan 2019 10:25:32 +0100 Message-Id: <20190123092538.8004-30-kbastian@mail.uni-paderborn.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190123092538.8004-1-kbastian@mail.uni-paderborn.de> References: <20190123092538.8004-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 X-PMX-Version: 6.4.6.2792898, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2019.1.23.91816, AntiVirus-Engine: 5.56.1, AntiVirus-Data: 2019.1.18.5561000 X-IMT-Spam-Score: 0.0 () X-IMT-Authenticated-Sender: X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 131.234.142.9 Subject: [Qemu-devel] [PATCH v6 29/35] target/riscv: Remove gen_system() 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: richard.henderson@linaro.org, peer.adelt@hni.uni-paderborn.de, qemu-riscv@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP with all 16 bit insns moved to decodetree no path is falling back to gen_system(), so we can remove it. Reviewed-by: Richard Henderson Signed-off-by: Bastian Koppelmann Signed-off-by: Peer Adelt --- target/riscv/translate.c | 31 ------------------------------- 1 file changed, 31 deletions(-) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index d0b0fca12b..0e37beb68e 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -427,32 +427,6 @@ static void gen_set_rm(DisasContext *ctx, int rm) tcg_temp_free_i32(t0); } -static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc, - int rd, int rs1, int csr) -{ - tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); - - switch (opc) { - case OPC_RISC_ECALL: - switch (csr) { - case 0x0: /* ECALL */ - /* always generates U-level ECALL, fixed in do_interrupt handler */ - generate_exception(ctx, RISCV_EXCP_U_ECALL); - tcg_gen_exit_tb(NULL, 0); /* no chaining */ - ctx->base.is_jmp = DISAS_NORETURN; - break; - case 0x1: /* EBREAK */ - generate_exception(ctx, RISCV_EXCP_BREAKPOINT); - tcg_gen_exit_tb(NULL, 0); /* no chaining */ - ctx->base.is_jmp = DISAS_NORETURN; - break; - default: - gen_exception_illegal(ctx); - break; - } - break; - } -} static void decode_RV32_64C0(DisasContext *ctx) { @@ -628,7 +602,6 @@ bool decode_insn16(DisasContext *ctx, uint16_t insn); static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) { - int rs1, rd; uint32_t op; /* We do not do misaligned address check here: the address should never be @@ -637,13 +610,9 @@ static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) * perform the misaligned instruction fetch */ op = MASK_OP_MAJOR(ctx->opcode); - rs1 = GET_RS1(ctx->opcode); - rd = GET_RD(ctx->opcode); switch (op) { case OPC_RISC_SYSTEM: - gen_system(env, ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1, - (ctx->opcode & 0xFFF00000) >> 20); break; default: gen_exception_illegal(ctx);