From patchwork Fri Oct 21 13:31:45 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 1101 Delivered-To: ffmpegpatchwork@gmail.com Received: by 10.103.140.133 with SMTP id o127csp1070948vsd; Fri, 21 Oct 2016 06:32:43 -0700 (PDT) X-Received: by 10.28.203.202 with SMTP id b193mr10585048wmg.0.1477056763672; Fri, 21 Oct 2016 06:32:43 -0700 (PDT) Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id o4si2624119wjd.164.2016.10.21.06.32.42; Fri, 21 Oct 2016 06:32:43 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 4EB27689C5A; Fri, 21 Oct 2016 16:31:58 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe04-2.mx.upcmail.net (vie01a-dmta-pe04-2.mx.upcmail.net [62.179.121.164]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 0755C689C37 for ; Fri, 21 Oct 2016 16:31:51 +0300 (EEST) Received: from [172.31.216.43] (helo=vie01a-pemc-psmtp-pe01) by vie01a-dmta-pe04.mx.upcmail.net with esmtp (Exim 4.87) (envelope-from ) id 1bxZvN-0007cz-UB for ffmpeg-devel@ffmpeg.org; Fri, 21 Oct 2016 15:31:53 +0200 Received: from localhost ([213.47.41.20]) by vie01a-pemc-psmtp-pe01 with SMTP @ mailcloud.upcmail.net id yDXs1t01L0S5wYM01DXtco; Fri, 21 Oct 2016 15:31:53 +0200 X-SourceIP: 213.47.41.20 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 21 Oct 2016 15:31:45 +0200 Message-Id: <20161021133146.11956-6-michael@niedermayer.cc> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161021133146.11956-1-michael@niedermayer.cc> References: <20161021133146.11956-1-michael@niedermayer.cc> Subject: [FFmpeg-devel] [PATCH 6/7] avutil/avassert: Add av_assertX_fpu() X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Michael Niedermayer --- libavutil/avassert.h | 9 +++++++++ libavutil/utils.c | 13 +++++++++++++ 2 files changed, 22 insertions(+) diff --git a/libavutil/avassert.h b/libavutil/avassert.h index f473637..46f3fea 100644 --- a/libavutil/avassert.h +++ b/libavutil/avassert.h @@ -59,8 +59,17 @@ */ #if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1 #define av_assert2(cond) av_assert0(cond) +#define av_assert2_fpu() av_assert0_fpu() #else #define av_assert2(cond) ((void)0) +#define av_assert2_fpu() ((void)0) #endif +/** + * Assert that floating point opperations can be executed. + * + * This will av_assert0() that the cpu is not in MMX state on X86 + */ +void av_assert0_fpu(void); + #endif /* AVUTIL_AVASSERT_H */ diff --git a/libavutil/utils.c b/libavutil/utils.c index f409f32..36e4dd5 100644 --- a/libavutil/utils.c +++ b/libavutil/utils.c @@ -125,3 +125,16 @@ AVRational av_get_time_base_q(void) { return (AVRational){1, AV_TIME_BASE}; } + +void av_assert0_fpu(void) { +#if HAVE_MMX_INLINE + uint16_t state[14]; + __asm volatile ( + "fstenv %0 \n\t" + : "+m" (state) + : + : "memory" + ); + av_assert0((state[4] & 3) == 3); +#endif +}