From patchwork Wed Jan 23 09:25:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 1029797 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 43l0LP3BFqz9s4s for ; Wed, 23 Jan 2019 20:27:25 +1100 (AEDT) Received: from localhost ([127.0.0.1]:58760 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmEod-0000BB-7q for incoming@patchwork.ozlabs.org; Wed, 23 Jan 2019 04:27:23 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40440) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmEnq-00005w-Ql for qemu-devel@nongnu.org; Wed, 23 Jan 2019 04:26:36 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gmEnp-0007Lt-K8 for qemu-devel@nongnu.org; Wed, 23 Jan 2019 04:26:34 -0500 Received: from mail.uni-paderborn.de ([131.234.142.9]:50926) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gmEnp-0007KW-9C; Wed, 23 Jan 2019 04:26:33 -0500 Received: from tweenies.uni-paderborn.de ([131.234.189.21] helo=localhost.localdomain) by mail.uni-paderborn.de with esmtp (Exim 4.89 hoth) id 1gmEnl-0003lw-Se; Wed, 23 Jan 2019 10:26:29 +0100 Received: from mail.uni-paderborn.de by tweenies with queue id 3072079-4; Wed, 23 Jan 2019 09:26:28 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 10:25:11 +0100 Message-Id: <20190123092538.8004-9-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 08/35] target/riscv: Convert RVXI csr insns to decodetree 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, Alistair Francis , peer.adelt@hni.uni-paderborn.de, qemu-riscv@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Acked-by: Alistair Francis Reviewed-by: Richard Henderson Signed-off-by: Bastian Koppelmann Signed-off-by: Peer Adelt --- target/riscv/insn32.decode | 8 +++ target/riscv/insn_trans/trans_rvi.inc.c | 79 +++++++++++++++++++++++++ target/riscv/translate.c | 43 +------------- 3 files changed, 88 insertions(+), 42 deletions(-) diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 804b721ca5..977b1b10a3 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -22,6 +22,7 @@ %rd 7:5 %sh10 20:10 +%csr 20:12 # immediates: %imm_i 20:s12 @@ -43,6 +44,7 @@ @j .................... ..... ....... imm=%imm_j %rd @sh ...... ...... ..... ... ..... ....... &shift shamt=%sh10 %rs1 %rd +@csr ............ ..... ... ..... ....... %csr %rs1 %rd # *** RV32I Base Instruction Set *** lui .................... ..... 0110111 @u @@ -84,3 +86,9 @@ or 0000000 ..... ..... 110 ..... 0110011 @r and 0000000 ..... ..... 111 ..... 0110011 @r fence ---- pred:4 succ:4 ----- 000 ----- 0001111 fence_i ---- ---- ---- ----- 001 ----- 0001111 +csrrw ............ ..... 001 ..... 1110011 @csr +csrrs ............ ..... 010 ..... 1110011 @csr +csrrc ............ ..... 011 ..... 1110011 @csr +csrrwi ............ ..... 101 ..... 1110011 @csr +csrrsi ............ ..... 110 ..... 1110011 @csr +csrrci ............ ..... 111 ..... 1110011 @csr diff --git a/target/riscv/insn_trans/trans_rvi.inc.c b/target/riscv/insn_trans/trans_rvi.inc.c index b468a0ac0e..b0f35cef14 100644 --- a/target/riscv/insn_trans/trans_rvi.inc.c +++ b/target/riscv/insn_trans/trans_rvi.inc.c @@ -337,3 +337,82 @@ static bool trans_fence_i(DisasContext *ctx, arg_fence_i *a) ctx->base.is_jmp = DISAS_NORETURN; return true; } + +#define RISCV_OP_CSR_PRE do {\ + source1 = tcg_temp_new(); \ + csr_store = tcg_temp_new(); \ + dest = tcg_temp_new(); \ + rs1_pass = tcg_temp_new(); \ + gen_get_gpr(source1, a->rs1); \ + tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); \ + tcg_gen_movi_tl(rs1_pass, a->rs1); \ + tcg_gen_movi_tl(csr_store, a->csr); \ + gen_io_start();\ +} while (0) + +#define RISCV_OP_CSR_POST do {\ + gen_io_end(); \ + gen_set_gpr(a->rd, dest); \ + tcg_gen_movi_tl(cpu_pc, ctx->pc_succ_insn); \ + tcg_gen_exit_tb(NULL, 0); \ + ctx->base.is_jmp = DISAS_NORETURN; \ + tcg_temp_free(source1); \ + tcg_temp_free(csr_store); \ + tcg_temp_free(dest); \ + tcg_temp_free(rs1_pass); \ +} while (0) + + +static bool trans_csrrw(DisasContext *ctx, arg_csrrw *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrw(dest, cpu_env, source1, csr_store); + RISCV_OP_CSR_POST; + return true; +} + +static bool trans_csrrs(DisasContext *ctx, arg_csrrs *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrs(dest, cpu_env, source1, csr_store, rs1_pass); + RISCV_OP_CSR_POST; + return true; +} + +static bool trans_csrrc(DisasContext *ctx, arg_csrrc *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrc(dest, cpu_env, source1, csr_store, rs1_pass); + RISCV_OP_CSR_POST; + return true; +} + +static bool trans_csrrwi(DisasContext *ctx, arg_csrrwi *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrw(dest, cpu_env, rs1_pass, csr_store); + RISCV_OP_CSR_POST; + return true; +} + +static bool trans_csrrsi(DisasContext *ctx, arg_csrrsi *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrs(dest, cpu_env, rs1_pass, csr_store, rs1_pass); + RISCV_OP_CSR_POST; + return true; +} + +static bool trans_csrrci(DisasContext *ctx, arg_csrrci *a) +{ + TCGv source1, csr_store, dest, rs1_pass; + RISCV_OP_CSR_PRE; + gen_helper_csrrc(dest, cpu_env, rs1_pass, csr_store, rs1_pass); + RISCV_OP_CSR_POST; + return true; +} diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 9899f10be4..a020305556 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1279,16 +1279,11 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc, int rd, static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc, int rd, int rs1, int csr) { - TCGv source1, csr_store, dest, rs1_pass, imm_rs1; + TCGv source1, dest; source1 = tcg_temp_new(); - csr_store = tcg_temp_new(); dest = tcg_temp_new(); - rs1_pass = tcg_temp_new(); - imm_rs1 = tcg_temp_new(); gen_get_gpr(source1, rs1); tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); - tcg_gen_movi_tl(rs1_pass, rs1); - tcg_gen_movi_tl(csr_store, csr); /* copy into temp reg to feed to helper */ #ifndef CONFIG_USER_ONLY /* Extract funct7 value and check whether it matches SFENCE.VMA */ @@ -1359,45 +1354,9 @@ static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc, break; } break; - default: - tcg_gen_movi_tl(imm_rs1, rs1); - gen_io_start(); - switch (opc) { - case OPC_RISC_CSRRW: - gen_helper_csrrw(dest, cpu_env, source1, csr_store); - break; - case OPC_RISC_CSRRS: - gen_helper_csrrs(dest, cpu_env, source1, csr_store, rs1_pass); - break; - case OPC_RISC_CSRRC: - gen_helper_csrrc(dest, cpu_env, source1, csr_store, rs1_pass); - break; - case OPC_RISC_CSRRWI: - gen_helper_csrrw(dest, cpu_env, imm_rs1, csr_store); - break; - case OPC_RISC_CSRRSI: - gen_helper_csrrs(dest, cpu_env, imm_rs1, csr_store, rs1_pass); - break; - case OPC_RISC_CSRRCI: - gen_helper_csrrc(dest, cpu_env, imm_rs1, csr_store, rs1_pass); - break; - default: - gen_exception_illegal(ctx); - return; - } - gen_io_end(); - gen_set_gpr(rd, dest); - /* end tb since we may be changing priv modes, to get mmu_index right */ - tcg_gen_movi_tl(cpu_pc, ctx->pc_succ_insn); - tcg_gen_exit_tb(NULL, 0); /* no chaining */ - ctx->base.is_jmp = DISAS_NORETURN; - break; } tcg_temp_free(source1); - tcg_temp_free(csr_store); tcg_temp_free(dest); - tcg_temp_free(rs1_pass); - tcg_temp_free(imm_rs1); } static void decode_RV32_64C0(DisasContext *ctx)