From mboxrd@z Thu Jan 1 00:00:00 1970 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 From: Bastian Koppelmann Date: Wed, 23 Jan 2019 10:25:32 +0100 Message-Id: <20190123092538.8004-30-kbastian@mail.uni-paderborn.de> In-Reply-To: <20190123092538.8004-1-kbastian@mail.uni-paderborn.de> References: <20190123092538.8004-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v6 29/35] target/riscv: Remove gen_system() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: sagark@eecs.berkeley.edu, palmer@sifive.com, kbastian@mail.uni-paderborn.de Cc: qemu-riscv@nongnu.org, peer.adelt@hni.uni-paderborn.de, richard.henderson@linaro.org, qemu-devel@nongnu.org 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); -- 2.20.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1gmF4a-00035n-KF for mharc-qemu-riscv@gnu.org; Wed, 23 Jan 2019 04:43:52 -0500 Received: from eggs.gnu.org ([209.51.188.92]:48533) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmF4R-0002St-4G for qemu-riscv@nongnu.org; Wed, 23 Jan 2019 04:43:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gmEot-0007yt-QX for qemu-riscv@nongnu.org; Wed, 23 Jan 2019 04:27:41 -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 Cc: qemu-riscv@nongnu.org, peer.adelt@hni.uni-paderborn.de, richard.henderson@linaro.org, qemu-devel@nongnu.org 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 Content-Transfer-Encoding: 8bit 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-riscv] [PATCH v6 29/35] target/riscv: Remove gen_system() X-BeenThere: qemu-riscv@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Jan 2019 09:43:49 -0000 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); -- 2.20.1