From nobody Wed Nov 5 04:42:52 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1532455001423648.4122987845792; Tue, 24 Jul 2018 10:56:41 -0700 (PDT) Received: from localhost ([::1]:41822 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fi1Y4-0006l4-R3 for importer@patchew.org; Tue, 24 Jul 2018 13:56:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42146) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fi1OZ-0005Do-VN for qemu-devel@nongnu.org; Tue, 24 Jul 2018 13:46:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fi1OW-000442-SL for qemu-devel@nongnu.org; Tue, 24 Jul 2018 13:46:48 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:46718 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 1fi1OW-00043A-GP for qemu-devel@nongnu.org; Tue, 24 Jul 2018 13:46:44 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 3E3FB1A44E6; Tue, 24 Jul 2018 19:46:43 +0200 (CEST) Received: from rtrkw774-lin.mipstec.com (unknown [82.117.201.26]) by mail.rt-rk.com (Postfix) with ESMTPSA id 1F19C1A1DCE; Tue, 24 Jul 2018 19:46:43 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Tue, 24 Jul 2018 19:31:21 +0200 Message-Id: <1532453527-22911-10-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1532453527-22911-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1532453527-22911-1-git-send-email-aleksandar.markovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH v4 09/55] 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: pburton@wavecomp.com, smarkovic@wavecomp.com, riku.voipio@iki.fi, richard.henderson@linaro.org, laurent@vivier.eu, philippe.mathieu.daude@gmail.com, amarkovic@wavecomp.com, pjovanovic@wavecomp.com, aurelien@aurel32.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Yongbok Kim Add emulation of SAVE16 and RESTORE.JRC16 instructions. Routines gen_save(), gen_restore(), and gen_adjust_sp() are provided for this purpose. Reviewed-by: Richard Henderson Signed-off-by: Yongbok Kim Signed-off-by: Aleksandar Markovic Signed-off-by: Stefan Markovic --- target/mips/translate.c | 74 +++++++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 74 insertions(+) diff --git a/target/mips/translate.c b/target/mips/translate.c index 4ef7df8..b76d8ec 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -16510,6 +16510,65 @@ static inline int decode_gpr_gpr4_zero(int r) #define NANOMIPS_EXTRACT_RS5(op) (op & 0x1f) =20 =20 +static void gen_adjust_sp(DisasContext *ctx, int u) +{ + TCGv tsp =3D tcg_temp_new(); + gen_base_offset_addr(ctx, tsp, 29, u); + gen_store_gpr(tsp, 29); + tcg_temp_free(tsp); +} + +static void gen_save(DisasContext *ctx, uint8_t rt, uint8_t count, + uint8_t gp, uint16_t u) +{ + int counter =3D 0; + TCGv va =3D tcg_temp_new(); + TCGv t0 =3D tcg_temp_new(); + + while (counter !=3D count) { + bool use_gp =3D gp && (counter =3D=3D count - 1); + int this_rt =3D use_gp ? 28 : (rt & 0x10) | ((rt + counter) & 0x1f= ); + int this_offset =3D -((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 =3D 0; + TCGv va =3D tcg_temp_new(); + TCGv t0 =3D tcg_temp_new(); + + while (counter !=3D count) { + bool use_gp =3D gp && (counter =3D=3D count - 1); + int this_rt =3D use_gp ? 28 : (rt & 0x10) | ((rt + counter) & 0x1f= ); + int this_offset =3D 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 =3D decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode)); @@ -16860,6 +16919,21 @@ static int decode_nanomips_opc(CPUMIPSState *env, = DisasContext *ctx) } break; case NM_P16_SR: + { + int count =3D extract32(ctx->opcode, 0, 4); + int u =3D extract32(ctx->opcode, 4, 4) << 4; + int rt =3D 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(ctx, OPC_JR, 2, 31, 0, 0, 0); + break; + } + } break; case NM_MOVEP: case NM_MOVEPREV: --=20 2.7.4