From patchwork Mon May 8 11:48:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kumar, Mahesh" X-Patchwork-Id: 9716089 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 5E00260234 for ; Mon, 8 May 2017 11:45:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4B6481FF27 for ; Mon, 8 May 2017 11:45:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4043D2029C; Mon, 8 May 2017 11:45:46 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F3D251FF27 for ; Mon, 8 May 2017 11:45:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A3DBB6E208; Mon, 8 May 2017 11:45:44 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 85F996E208 for ; Mon, 8 May 2017 11:45:43 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 May 2017 04:45:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.38,309,1491289200"; d="scan'208"; a="1127746467" Received: from kumarmah-desk.iind.intel.com ([10.223.26.44]) by orsmga001.jf.intel.com with ESMTP; 08 May 2017 04:45:41 -0700 From: Mahesh Kumar To: intel-gfx@lists.freedesktop.org Date: Mon, 8 May 2017 17:18:53 +0530 Message-Id: <20170508114902.18965-3-mahesh1.kumar@intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170508114902.18965-1-mahesh1.kumar@intel.com> References: <20170508114902.18965-1-mahesh1.kumar@intel.com> Cc: paulo.r.zanoni@intel.com, maarten.lankhorst@intel.com Subject: [Intel-gfx] [PATCH 02/11] drm/i915: Add more wrapper for fixed_point_16_16 operations X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds few wrapper to perform fixed_point_16_16 operations mul_u32_fixed_16_16_round_up : Multiplies u32 and fixed_16_16_t variables & returns u32 result with rounding-off. mul_fixed_16_16 : Multiplies two fixed_16_16_t variable & returns fixed_16_16 div_round_up_fixed_16_16 : Perform division operation on fixed_16_16_t variables & return u32 result with round-off fixed_16_16_div_round_up_u64 : devide uint32_t variable by fixed_16_16 variable and round_up the result to uint32_t. These wrappers will be used by later patches in the series. Signed-off-by: Mahesh Kumar --- drivers/gpu/drm/i915/i915_drv.h | 43 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 5804734d30a3..5ff0091707c0 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -152,6 +152,38 @@ static inline uint_fixed_16_16_t max_fixed_16_16(uint_fixed_16_16_t max1, return max; } +static inline uint32_t div_round_up_fixed_16_16(uint_fixed_16_16_t val, + uint_fixed_16_16_t d) +{ + return DIV_ROUND_UP(val.val, d.val); +} + +static inline uint32_t mul_u32_fixed_16_16_round_up(uint32_t val, + uint_fixed_16_16_t mul) +{ + uint64_t intermediate_val; + uint32_t result; + + intermediate_val = (uint64_t) val * mul.val; + intermediate_val = DIV_ROUND_UP_ULL(intermediate_val, 1 << 16); + WARN_ON(intermediate_val >> 32); + result = clamp_t(uint32_t, intermediate_val, 0, ~0); + return result; +} + +static inline uint_fixed_16_16_t mul_fixed_16_16(uint_fixed_16_16_t val, + uint_fixed_16_16_t mul) +{ + uint64_t intermediate_val; + uint_fixed_16_16_t fp; + + intermediate_val = (uint64_t) val.val * mul.val; + intermediate_val = intermediate_val >> 16; + WARN_ON(intermediate_val >> 32); + fp.val = clamp_t(uint32_t, intermediate_val, 0, ~0); + return fp; +} + static inline uint_fixed_16_16_t fixed_16_16_div(uint32_t val, uint32_t d) { uint_fixed_16_16_t fp, res; @@ -174,6 +206,17 @@ static inline uint_fixed_16_16_t fixed_16_16_div_u64(uint32_t val, uint32_t d) return res; } +static inline uint32_t fixed_16_16_div_round_up_u64(uint32_t val, + uint_fixed_16_16_t d) +{ + uint64_t interm_val; + + interm_val = (uint64_t)val << 16; + interm_val = DIV_ROUND_UP_ULL(interm_val, d.val); + WARN_ON(interm_val >> 32); + return clamp_t(uint32_t, interm_val, 0, ~0); +} + static inline uint_fixed_16_16_t mul_u32_fixed_16_16(uint32_t val, uint_fixed_16_16_t mul) {