From patchwork Thu Aug 23 14:18:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksandar Markovic X-Patchwork-Id: 10574117 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 26E1514E1 for ; Thu, 23 Aug 2018 14:26:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1BDA82C22D for ; Thu, 23 Aug 2018 14:26:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 10A532C230; Thu, 23 Aug 2018 14:26:47 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 8957B2C22F for ; Thu, 23 Aug 2018 14:26:46 +0000 (UTC) Received: from localhost ([::1]:36829 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fsqZR-0004vX-MK for patchwork-qemu-devel@patchwork.kernel.org; Thu, 23 Aug 2018 10:26:45 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33461) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fsqSG-0005Cn-3h for qemu-devel@nongnu.org; Thu, 23 Aug 2018 10:19:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fsqSD-0004lv-R5 for qemu-devel@nongnu.org; Thu, 23 Aug 2018 10:19:19 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:57033 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fsqS9-0004jb-Ti for qemu-devel@nongnu.org; Thu, 23 Aug 2018 10:19:15 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 934391A4166; Thu, 23 Aug 2018 16:19:07 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com Received: from rtrkw774-lin.domain.local (rtrkw774-lin.domain.local [10.10.13.43]) by mail.rt-rk.com (Postfix) with ESMTPSA id 5FE881A242E; Thu, 23 Aug 2018 16:19:07 +0200 (CEST) From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Thu, 23 Aug 2018 16:18:28 +0200 Message-Id: <1535033941-861-14-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1535033941-861-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1535033941-861-1-git-send-email-aleksandar.markovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PULL v5 13/46] target/mips: Add emulation of nanoMIPS 16-bit save and restore instructions 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: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Stefan Markovic Add emulation of SAVE16 and RESTORE.JRC16 instructions. Routines gen_save(), gen_restore(), and gen_adjust_sp() are provided to support this feature. This patch at the same time provides function gen_op_addr_addi(). This function will be used in emulation of some other nanoMIPS instructions. Reviewed-by: Richard Henderson Signed-off-by: Yongbok Kim Signed-off-by: Aleksandar Markovic Signed-off-by: Stefan Markovic --- target/mips/translate.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/target/mips/translate.c b/target/mips/translate.c index 75f2b64..cf3254b 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -1746,6 +1746,18 @@ static inline void gen_op_addr_add (DisasContext *ctx, TCGv ret, TCGv arg0, TCGv #endif } +static inline void gen_op_addr_addi(DisasContext *ctx, TCGv ret, TCGv base, + target_long ofs) +{ + tcg_gen_addi_tl(ret, base, ofs); + +#if defined(TARGET_MIPS64) + if (ctx->hflags & MIPS_HFLAG_AWRAP) { + tcg_gen_ext32s_i64(ret, ret); + } +#endif +} + /* Addresses computation (translation time) */ static target_long addr_add(DisasContext *ctx, target_long base, target_long offset) @@ -16770,6 +16782,62 @@ static inline int decode_gpr_gpr4_zero(int r) #define NANOMIPS_EXTRACT_RS5(op) (op & 0x1f) +static void gen_adjust_sp(DisasContext *ctx, int u) +{ + gen_op_addr_addi(ctx, cpu_gpr[29], cpu_gpr[29], u); +} + +static void gen_save(DisasContext *ctx, uint8_t rt, uint8_t count, + uint8_t gp, uint16_t u) +{ + int counter = 0; + TCGv va = tcg_temp_new(); + TCGv t0 = tcg_temp_new(); + + while (counter != count) { + bool use_gp = gp && (counter == count - 1); + int this_rt = use_gp ? 28 : (rt & 0x10) | ((rt + counter) & 0x1f); + int this_offset = -((counter + 1) << 2); + gen_base_offset_addr(ctx, va, 29, this_offset); + gen_load_gpr(t0, this_rt); + tcg_gen_qemu_st_tl(t0, va, ctx->mem_idx, + (MO_TEUL | ctx->default_tcg_memop_mask)); + counter++; + } + + /* adjust stack pointer */ + gen_adjust_sp(ctx, -u); + + tcg_temp_free(t0); + tcg_temp_free(va); +} + +static void gen_restore(DisasContext *ctx, uint8_t rt, uint8_t count, + uint8_t gp, uint16_t u) +{ + int counter = 0; + TCGv va = tcg_temp_new(); + TCGv t0 = tcg_temp_new(); + + while (counter != count) { + bool use_gp = gp && (counter == count - 1); + int this_rt = use_gp ? 28 : (rt & 0x10) | ((rt + counter) & 0x1f); + int this_offset = u - ((counter + 1) << 2); + gen_base_offset_addr(ctx, va, 29, this_offset); + tcg_gen_qemu_ld_tl(t0, va, ctx->mem_idx, MO_TESL | + ctx->default_tcg_memop_mask); + tcg_gen_ext32s_tl(t0, t0); + gen_store_gpr(t0, this_rt); + counter++; + } + + /* adjust stack pointer */ + gen_adjust_sp(ctx, u); + + tcg_temp_free(t0); + tcg_temp_free(va); +} + static void gen_pool16c_nanomips_insn(DisasContext *ctx) { int rt = decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode)); @@ -17087,6 +17155,21 @@ static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx) } break; case NM_P16_SR: + { + int count = extract32(ctx->opcode, 0, 4); + int u = extract32(ctx->opcode, 4, 4) << 4; + + rt = 30 + extract32(ctx->opcode, 9, 1); + switch (extract32(ctx->opcode, 8, 1)) { + case NM_SAVE16: + gen_save(ctx, rt, count, 0, u); + break; + case NM_RESTORE_JRC16: + gen_restore(ctx, rt, count, 0, u); + gen_compute_branch_nm(ctx, OPC_JR, 2, 31, 0, 0); + break; + } + } break; case NM_MOVEP: break;