From patchwork Fri Feb 22 14:10:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 1046909 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) 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=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=mail.uni-paderborn.de Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 445Yx53d1Xz9s9L for ; Sat, 23 Feb 2019 01:43:21 +1100 (AEDT) Received: from localhost ([127.0.0.1]:51894 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gxC2p-0004YY-Bm for incoming@patchwork.ozlabs.org; Fri, 22 Feb 2019 09:43:19 -0500 Received: from eggs.gnu.org ([209.51.188.92]:41230) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gxBZc-0006Gx-Rv for qemu-devel@nongnu.org; Fri, 22 Feb 2019 09:13:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gxBZV-0000Vc-98 for qemu-devel@nongnu.org; Fri, 22 Feb 2019 09:13:03 -0500 Received: from mail.uni-paderborn.de ([131.234.142.9]:42006) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gxBZH-000779-Fo; Fri, 22 Feb 2019 09:12:52 -0500 Received: from wormulon.uni-paderborn.de ([131.234.189.22] helo=localhost.localdomain) by mail.uni-paderborn.de with esmtp (Exim 4.89 telepax) id 1gxBYN-0001yt-6P; Fri, 22 Feb 2019 15:11:52 +0100 Received: from mail.uni-paderborn.de by wormulon with queue id 3169556-5; Fri, 22 Feb 2019 14:11:50 GMT X-Envelope-From: From: Bastian Koppelmann To: sagark@eecs.berkeley.edu, palmer@sifive.com, kbastian@mail.uni-paderborn.de Date: Fri, 22 Feb 2019 15:10:18 +0100 Message-Id: <20190222141024.22217-29-kbastian@mail.uni-paderborn.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190222141024.22217-1-kbastian@mail.uni-paderborn.de> References: <20190222141024.22217-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 X-PMX-Version: 6.4.6.2792898, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2019.2.22.140616, AntiVirus-Engine: 5.58.0, AntiVirus-Data: 2019.2.19.5580002 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 v8 28/34] 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: qemu-riscv@nongnu.org, peer.adelt@hni.uni-paderborn.de, richard.henderson@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 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 | 34 ---------------------------------- 1 file changed, 34 deletions(-) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index dedf4189d5..92be090bc7 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -473,33 +473,6 @@ static void gen_set_rm(DisasContext *ctx, int rm) tcg_temp_free_i32(t0); } -static void gen_system(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) { uint8_t funct3 = extract32(ctx->opcode, 13, 3); @@ -680,7 +653,6 @@ bool decode_insn16(DisasContext *ctx, uint16_t insn); static void decode_RV32_64G(DisasContext *ctx) { - int rs1, rd; uint32_t op; /* We do not do misaligned address check here: the address should never be @@ -689,14 +661,8 @@ static void decode_RV32_64G(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(ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1, - (ctx->opcode & 0xFFF00000) >> 20); - break; default: gen_exception_illegal(ctx); break;