From patchwork Tue Oct 20 15:26:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chen Gang X-Patchwork-Id: 533041 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 8CA7E1401DE for ; Wed, 21 Oct 2015 02:26:53 +1100 (AEDT) Received: from localhost ([::1]:46366 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZoYoN-0008DY-KA for incoming@patchwork.ozlabs.org; Tue, 20 Oct 2015 11:26:51 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36322) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZoYnr-0007YO-Tr for qemu-devel@nongnu.org; Tue, 20 Oct 2015 11:26:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZoYnn-0005Is-JF for qemu-devel@nongnu.org; Tue, 20 Oct 2015 11:26:19 -0400 Received: from col004-omc2s18.hotmail.com ([65.55.34.92]:63651) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZoYnn-0005Ij-A5 for qemu-devel@nongnu.org; Tue, 20 Oct 2015 11:26:15 -0400 Received: from COL130-W56 ([65.55.34.73]) by COL004-OMC2S18.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Tue, 20 Oct 2015 08:26:13 -0700 X-TMN: [JlkRZk43vryE3ttiCuUVLVMZ3+ItC2AL] X-Originating-Email: [xili_gchen_5257@hotmail.com] Message-ID: From: Chen Gang To: "rth@twiddle.net" , Peter Maydell , Chris Metcalf Date: Tue, 20 Oct 2015 23:26:13 +0800 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 20 Oct 2015 15:26:13.0950 (UTC) FILETIME=[A8004DE0:01D10B4B] X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 65.55.34.92 Cc: qemu-devel Subject: [Qemu-devel] [PATCH] target-tilegx: Implement prefetch instructions in pipe y2 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From 14fe2a651b3f5729f1d402dfcd6eb5f7da0f42b1 Mon Sep 17 00:00:00 2001 From: Chen Gang Date: Tue, 20 Oct 2015 23:19:02 +0800 Subject: [PATCH] target-tilegx: Implement prefetch instructions in pipe y2 Originally, tilegx qemu only implement prefetch instructions in pipe x1, did not implement them in pipe y2. Signed-off-by: Chen Gang ---  target-tilegx/translate.c | 10 ++++++++--  1 file changed, 8 insertions(+), 2 deletions(-) --  1.9.3 diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c index 34d45f8..b8ca401 100644 --- a/target-tilegx/translate.c +++ b/target-tilegx/translate.c @@ -2105,6 +2105,7 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle)      unsigned srcbdest = get_SrcBDest_Y2(bundle);      const char *mnemonic;      TCGMemOp memop; +    bool prefetch_nofault = false;        switch (OEY2(opc, mode)) {      case OEY2(LD1S_OPCODE_Y2, MODE_OPCODE_YA2): @@ -2114,6 +2115,7 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle)      case OEY2(LD1U_OPCODE_Y2, MODE_OPCODE_YA2):          memop = MO_UB;          mnemonic = "ld1u"; +        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);          goto do_load;      case OEY2(LD2S_OPCODE_Y2, MODE_OPCODE_YA2):          memop = MO_TESW; @@ -2122,6 +2124,7 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle)      case OEY2(LD2U_OPCODE_Y2, MODE_OPCODE_YA2):          memop = MO_TEUW;          mnemonic = "ld2u"; +        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);          goto do_load;      case OEY2(LD4S_OPCODE_Y2, MODE_OPCODE_YB2):          memop = MO_TESL; @@ -2130,13 +2133,16 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle)      case OEY2(LD4U_OPCODE_Y2, MODE_OPCODE_YB2):          memop = MO_TEUL;          mnemonic = "ld4u"; +        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);          goto do_load;      case OEY2(LD_OPCODE_Y2, MODE_OPCODE_YB2):          memop = MO_TEQ;          mnemonic = "ld";      do_load: -        tcg_gen_qemu_ld_tl(dest_gr(dc, srcbdest), load_gr(dc, srca), -                           dc->mmuidx, memop); +        if (!prefetch_nofault) { +            tcg_gen_qemu_ld_tl(dest_gr(dc, srcbdest), load_gr(dc, srca), +                               dc->mmuidx, memop); +        }          qemu_log_mask(CPU_LOG_TB_IN_ASM, "%s %s, %s", mnemonic,                        reg_names[srcbdest], reg_names[srca]);          return TILEGX_EXCP_NONE;