From patchwork Wed Feb 8 00:44:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharata B Rao X-Patchwork-Id: 9561559 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1CBC860434 for ; Wed, 8 Feb 2017 00:47:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0DA3228488 for ; Wed, 8 Feb 2017 00:47:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 012432848E; Wed, 8 Feb 2017 00:47:54 +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=-6.9 required=2.0 tests=BAYES_00,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 54A6428488 for ; Wed, 8 Feb 2017 00:47:54 +0000 (UTC) Received: from localhost ([::1]:57117 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cbGQL-0007gS-EM for patchwork-qemu-devel@patchwork.kernel.org; Tue, 07 Feb 2017 19:47:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59362) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cbGMp-0005BY-QO for qemu-devel@nongnu.org; Tue, 07 Feb 2017 19:44:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cbGMm-0004wP-Nk for qemu-devel@nongnu.org; Tue, 07 Feb 2017 19:44:15 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:37544) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cbGMm-0004wA-E7 for qemu-devel@nongnu.org; Tue, 07 Feb 2017 19:44:12 -0500 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v180hY3t091441 for ; Tue, 7 Feb 2017 19:44:11 -0500 Received: from e28smtp04.in.ibm.com (e28smtp04.in.ibm.com [125.16.236.4]) by mx0a-001b2d01.pphosted.com with ESMTP id 28faw8qk5m-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 07 Feb 2017 19:44:11 -0500 Received: from localhost by e28smtp04.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 8 Feb 2017 06:14:07 +0530 Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id B5771E0024; Wed, 8 Feb 2017 06:15:32 +0530 (IST) Received: from d28av06.in.ibm.com (d28av06.in.ibm.com [9.184.220.48]) by d28relay03.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v180i67s36110456; Wed, 8 Feb 2017 06:14:06 +0530 Received: from d28av06.in.ibm.com (localhost [127.0.0.1]) by d28av06.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v180i57k019600; Wed, 8 Feb 2017 06:14:06 +0530 Received: from in.ibm.com ([9.79.205.133]) by d28av06.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v180i3eS019597 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 8 Feb 2017 06:14:04 +0530 Date: Wed, 8 Feb 2017 06:14:03 +0530 From: Bharata B Rao To: Richard Henderson References: <1486454676-29112-1-git-send-email-bharata@linux.vnet.ibm.com> <1486454676-29112-3-git-send-email-bharata@linux.vnet.ibm.com> <6dac1bb1-bb4c-9dc5-ff6e-020db8a4bcd5@twiddle.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <6dac1bb1-bb4c-9dc5-ff6e-020db8a4bcd5@twiddle.net> User-Agent: Mutt/1.7.1 (2016-10-04) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17020800-0012-0000-0000-000003B3112E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17020800-0013-0000-0000-00001B3427FF Message-Id: <20170208004403.GI12744@in.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-02-07_12:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1702080006 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: Re: [Qemu-devel] [RFC PATCH v1 2/2] softfloat: Add float128_to_uint32_round_to_zero() 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: , Reply-To: bharata@linux.vnet.ibm.com Cc: peter.maydell@linaro.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, nikunj@linux.vnet.ibm.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP On Tue, Feb 07, 2017 at 02:10:04PM -0800, Richard Henderson wrote: > On 02/07/2017 12:04 AM, Bharata B Rao wrote: > > + int64_t v; > > + uint32_t res; > > + int old_exc_flags = get_float_exception_flags(status); > > + > > + v = float128_to_uint64_round_to_zero(a, status); > > + if (v > 0xffffffff) { > > v should be uint64_t. Right, here is the updated patch... Peter/David - If you want both the patches to be posted afresh, let me know. (These patches apply on David's ppc-for-2.9 branch) From 24afd78beb5f5742f9da76cf5330ea465697be7b Mon Sep 17 00:00:00 2001 From: Bharata B Rao Date: Mon, 30 Jan 2017 15:23:04 +0530 Subject: [PATCH v2 2/2] softfloat: Add float128_to_uint32_round_to_zero() float128_to_uint32_round_to_zero() is needed by xscvqpuwz instruction of PowerPC ISA 3.0. Signed-off-by: Bharata B Rao Reviewed-by: Peter Maydell --- fpu/softfloat.c | 28 ++++++++++++++++++++++++++++ include/fpu/softfloat.h | 1 + 2 files changed, 29 insertions(+) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 4a4b50b..c2f0de0 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -6169,6 +6169,34 @@ uint64_t float128_to_uint64_round_to_zero(float128 a, float_status *status) /*---------------------------------------------------------------------------- | Returns the result of converting the quadruple-precision floating-point +| value `a' to the 32-bit unsigned integer format. The conversion +| is performed according to the IEC/IEEE Standard for Binary Floating-Point +| Arithmetic except that the conversion is always rounded toward zero. +| If `a' is a NaN, the largest positive integer is returned. Otherwise, +| if the conversion overflows, the largest unsigned integer is returned. +| If 'a' is negative, the value is rounded and zero is returned; negative +| values that do not round to zero will raise the inexact exception. +*----------------------------------------------------------------------------*/ + +uint32_t float128_to_uint32_round_to_zero(float128 a, float_status *status) +{ + uint64_t v; + uint32_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float128_to_uint64_round_to_zero(a, status); + if (v > 0xffffffff) { + res = 0xffffffff; + } else { + return v; + } + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid, status); + return res; +} + +/*---------------------------------------------------------------------------- +| Returns the result of converting the quadruple-precision floating-point | value `a' to the single-precision floating-point format. The conversion | is performed according to the IEC/IEEE Standard for Binary Floating-Point | Arithmetic. diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 4e99253..9eb5a6b 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -714,6 +714,7 @@ int64_t float128_to_int64(float128, float_status *status); int64_t float128_to_int64_round_to_zero(float128, float_status *status); uint64_t float128_to_uint64(float128, float_status *status); uint64_t float128_to_uint64_round_to_zero(float128, float_status *status); +uint32_t float128_to_uint32_round_to_zero(float128, float_status *status); float32 float128_to_float32(float128, float_status *status); float64 float128_to_float64(float128, float_status *status); floatx80 float128_to_floatx80(float128, float_status *status);