From patchwork Tue Feb 6 09:56:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 10202669 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 18E69601A1 for ; Tue, 6 Feb 2018 09:58:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 03028287AB for ; Tue, 6 Feb 2018 09:58:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB41B289C9; Tue, 6 Feb 2018 09:58:02 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1A1D7286C4 for ; Tue, 6 Feb 2018 09:58:01 +0000 (UTC) Received: from localhost ([::1]:48521 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ej00m-0006cx-Cx for patchwork-qemu-devel@patchwork.kernel.org; Tue, 06 Feb 2018 04:58:00 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36841) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eizyy-0005KC-Ly for qemu-devel@nongnu.org; Tue, 06 Feb 2018 04:56:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eizyt-0006pF-O4 for qemu-devel@nongnu.org; Tue, 06 Feb 2018 04:56:08 -0500 Received: from mail.ispras.ru ([83.149.199.45]:39852) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eizyt-0006p5-FU for qemu-devel@nongnu.org; Tue, 06 Feb 2018 04:56:03 -0500 Received: from [127.0.1.1] (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id A3BFB54008B; Tue, 6 Feb 2018 12:56:02 +0300 (MSK) From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Tue, 06 Feb 2018 12:56:03 +0300 Message-ID: <20180206095603.26500.5959.stgit@pasha-VirtualBox> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 83.149.199.45 Subject: [Qemu-devel] [PATCH] m68k: implement movep instruction 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: dovgaluk@ispras.ru, laurent@vivier.eu, pavel.dovgaluk@ispras.ru Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch implements movep instruction. It moves data between a data register and alternate bytes within the address space starting at the location specified and incrementing by two. It was designed for the original 68000 and used in firmwares for interfacing the 8-bit peripherals through the 16-bit data bus. Without this patch opcode for this instruction is recognized as some bitop. Signed-off-by: Pavel Dovgalyuk Signed-off-by: Mihail Abakumov --- target/m68k/translate.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/target/m68k/translate.c b/target/m68k/translate.c index f0e86a7..a849c74 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -2071,6 +2071,55 @@ DISAS_INSN(movem) tcg_temp_free(addr); } +DISAS_INSN(movep) +{ + uint8_t i; + uint8_t op; + uint16_t displ; + TCGv reg; + TCGv addr; + TCGv abuf; + TCGv dbuf; + + op = (insn >> 6) & 7; + displ = read_im16(env, s); + + addr = AREG(insn, 0); + reg = DREG(insn, 9); + + abuf = tcg_temp_new(); + tcg_gen_addi_i32(abuf, addr, displ); + dbuf = tcg_temp_new(); + + if (op & 1) { + i = 4; + } else { + i = 2; + } + + if (op & 2) { + for ( ; i > 0 ; i--) { + tcg_gen_shri_i32(dbuf, reg, (i - 1) * 8); + gen_store(s, OS_BYTE, abuf, dbuf); + if (i > 1) { + tcg_gen_addi_i32(abuf, abuf, 2); + } + } + } else { + tcg_gen_movi_i32(reg, 0); + for ( ; i > 0 ; i--) { + dbuf = gen_load(s, OS_BYTE, abuf, 1); + tcg_gen_or_i32(reg, reg, dbuf); + if (i > 1) { + tcg_gen_shli_i32(reg, reg, 8); + tcg_gen_addi_i32(abuf, abuf, 2); + } + } + } + tcg_temp_free(abuf); + tcg_temp_free(dbuf); +} + DISAS_INSN(bitop_im) { int opsize; @@ -5579,9 +5628,13 @@ void register_m68k_insns (CPUM68KState *env) INSN(chk2, 00c0, f9c0, CHK2); INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC); BASE(bitop_reg, 0100, f1c0); + BASE(movep, 0108, f1f8); BASE(bitop_reg, 0140, f1c0); + BASE(movep, 0148, f1f8); BASE(bitop_reg, 0180, f1c0); + BASE(movep, 0188, f1f8); BASE(bitop_reg, 01c0, f1c0); + BASE(movep, 01c8, f1f8); INSN(arith_im, 0280, fff8, CF_ISA_A); INSN(arith_im, 0200, ff00, M68000); INSN(undef, 02c0, ffc0, M68000);