From patchwork Sun Sep 1 16:16:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 271610 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)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 5CA2A2C0097 for ; Mon, 2 Sep 2013 02:20:41 +1000 (EST) Received: from localhost ([::1]:34634 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VGAOF-0006t7-Fe for incoming@patchwork.ozlabs.org; Sun, 01 Sep 2013 12:20:39 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60454) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VGAKJ-0000Cr-2m for qemu-devel@nongnu.org; Sun, 01 Sep 2013 12:16:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VGAKD-0006wi-3M for qemu-devel@nongnu.org; Sun, 01 Sep 2013 12:16:35 -0400 Received: from mail-pb0-x234.google.com ([2607:f8b0:400e:c01::234]:55829) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VGAKC-0006wa-Rj for qemu-devel@nongnu.org; Sun, 01 Sep 2013 12:16:29 -0400 Received: by mail-pb0-f52.google.com with SMTP id wz12so3794108pbc.11 for ; Sun, 01 Sep 2013 09:16:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=xErHG1+4krJza9VtCttPJyDq+kBVbbdqgVtXMYy1J14=; b=rbzbFqc/wx7RicHMkLy4+fW+78c20onzQ7TO0Yez+s82hpCfUmLen3zXDYb+dVbHg5 GaCFbgUZfmJOTIHMYZ6imdlmvyXt5/NVqLs4BWfB7pJGW2/BysAUEW+2XvIUd16MyLp1 PtuOeObc6mMH8x6oJO246sEPKC2ncs4tXdoImxkF0eAgBiWDwhPHm3RP+WoHNvofM7Q+ bbDwb/BP/i7ukvuLp49GZYLU8+1OPtDGlyBQt1uwX3UnuGTYArpoy5m49Pums+o9XnD4 rvHvdFDRSCa3CIATg+VZvkd++DyOZEbaqRFpT9ynVBUn+DKidMcSYIZ35UaM/9x09Fwm X0aw== X-Received: by 10.68.186.193 with SMTP id fm1mr1565656pbc.163.1378052187722; Sun, 01 Sep 2013 09:16:27 -0700 (PDT) Received: from pebble.twiddle.net (50-194-63-110-static.hfc.comcastbusiness.net. [50.194.63.110]) by mx.google.com with ESMTPSA id bt1sm10512576pbb.2.1969.12.31.16.00.00 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Sun, 01 Sep 2013 09:16:27 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Sun, 1 Sep 2013 09:16:06 -0700 Message-Id: <1378052173-3579-8-git-send-email-rth@twiddle.net> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1378052173-3579-1-git-send-email-rth@twiddle.net> References: <1378052173-3579-1-git-send-email-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2607:f8b0:400e:c01::234 Cc: "Vassili Karpov \(malc\)" , aurelien@aurel32.net, Richard Henderson Subject: [Qemu-devel] [PATCH 07/14] tcg-ppc64: Fold constant call address into descriptor load 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 Eliminates one insn per call: : lis r2,4165 -: ori r2,r2,59616 -: ld r0,0(r2) +: ld r0,-5920(r2) : mtctr r0 -: ld r2,8(r2) +: ld r2,-5912(r2) : bctrl Signed-off-by: Richard Henderson --- tcg/ppc64/tcg-target.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c index e631991..033518c 100644 --- a/tcg/ppc64/tcg-target.c +++ b/tcg/ppc64/tcg-target.c @@ -713,16 +713,24 @@ static void tcg_out_call(TCGContext *s, tcg_target_long arg, int const_arg) tcg_out32(s, BCLR | BO_ALWAYS | LK); } #else - int reg = arg; + TCGReg reg = arg; + int ofs = 0; if (const_arg) { + /* Fold the low bits of the constant into the addresses below. */ + ofs = (int16_t)arg; + if (ofs + 8 < 0x8000) { + arg -= ofs; + } else { + ofs = 0; + } reg = TCG_REG_R2; tcg_out_movi(s, TCG_TYPE_I64, reg, arg); } - tcg_out32(s, LD | TAI(TCG_REG_R0, reg, 0)); + tcg_out32(s, LD | TAI(TCG_REG_R0, reg, ofs)); tcg_out32(s, MTSPR | RA(TCG_REG_R0) | CTR); - tcg_out32(s, LD | TAI(TCG_REG_R2, reg, 8)); + tcg_out32(s, LD | TAI(TCG_REG_R2, reg, ofs + 8)); tcg_out32(s, BCCTR | BO_ALWAYS | LK); #endif }