From patchwork Tue Oct 30 00:11:56 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 195220 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 6882B2C0080 for ; Tue, 30 Oct 2012 12:25:14 +1100 (EST) Received: from localhost ([::1]:34116 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TSzSB-0000UX-8i for incoming@patchwork.ozlabs.org; Mon, 29 Oct 2012 20:13:11 -0400 Received: from eggs.gnu.org ([208.118.235.92]:43631) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TSzRQ-00079i-7I for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TSzRM-0005CX-Kj for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:24 -0400 Received: from hall.aurel32.net ([88.191.126.93]:39639) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TSzRM-0005BU-Bd for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:20 -0400 Received: from 89-92-80-242.hfc.dyn.abo.bbox.fr ([89.92.80.242] helo=ohm.aurel32.net) by hall.aurel32.net with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1TSzRK-0000QX-A5; Tue, 30 Oct 2012 01:12:18 +0100 Received: from aurel32 by ohm.aurel32.net with local (Exim 4.80) (envelope-from ) id 1TSzRF-0005Bc-Vk; Tue, 30 Oct 2012 01:12:13 +0100 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Tue, 30 Oct 2012 01:11:56 +0100 Message-Id: <1351555932-19695-4-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1351555932-19695-1-git-send-email-aurelien@aurel32.net> References: <1351555932-19695-1-git-send-email-aurelien@aurel32.net> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 88.191.126.93 Cc: Peter Maydell , Aurelien Jarno Subject: [Qemu-devel] [PATCH v2 03/19] softfloat: implement fused multiply-add NaN propagation for MIPS 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 Add a pickNaNMulAdd function for MIPS, implementing NaN propagation rules for MIPS fused multiply-add instructions. Cc: Peter Maydell Signed-off-by: Aurelien Jarno --- fpu/softfloat-specialize.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index a1d489e..518f694 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -486,6 +486,33 @@ static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, return 1; } } +#elif defined(TARGET_MIPS) +static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, + flag cIsQNaN, flag cIsSNaN, flag infzero STATUS_PARAM) +{ + /* For MIPS, the (inf,zero,qnan) case sets InvalidOp and returns + * the default NaN + */ + if (infzero) { + float_raise(float_flag_invalid STATUS_VAR); + return 3; + } + + /* Prefer sNaN over qNaN, in the a, b, c order. */ + if (aIsSNaN) { + return 0; + } else if (bIsSNaN) { + return 1; + } else if (cIsSNaN) { + return 2; + } else if (aIsQNaN) { + return 0; + } else if (bIsQNaN) { + return 1; + } else { + return 2; + } +} #elif defined(TARGET_PPC) static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, flag cIsQNaN, flag cIsSNaN, flag infzero STATUS_PARAM)