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[79.124.17.100]) by mx.google.com with ESMTP id 4fb4d7f45d1cf-57c7fd892f0si2468071a12.15.2024.06.11.07.55.15; Tue, 11 Jun 2024 07:55:23 -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 6EB7B68D85A; Tue, 11 Jun 2024 17:55:12 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from ursule.remlab.net (vps-a2bccee9.vps.ovh.net [51.75.19.47]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id B97CB68D777 for ; Tue, 11 Jun 2024 17:55:05 +0300 (EEST) Received: from basile.remlab.net (localhost [IPv6:::1]) by ursule.remlab.net (Postfix) with ESMTP id 2BBCBC00A2 for ; Tue, 11 Jun 2024 17:55:05 +0300 (EEST) From: =?utf-8?q?R=C3=A9mi_Denis-Courmont?= To: ffmpeg-devel@ffmpeg.org Date: Tue, 11 Jun 2024 17:55:03 +0300 Message-ID: <20240611145505.14934-1-remi@remlab.net> X-Mailer: git-send-email 2.45.1 In-Reply-To: <4929107.rjQTLOYEdK@basile.remlab.net> References: <4929107.rjQTLOYEdK@basile.remlab.net> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/2] lavc/vc1dsp: match C block content in inv_trans_8x4_rvv X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 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 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: +jJ1HRSm4oqA This shifts the mid-point (after horizontal, before vertical) block state of the transform to match the C code. This forces shifting 8 vectors of 4 elements instead of 4 vectors of 8 elements and is thus slight slower. --- libavcodec/riscv/vc1dsp_rvv.S | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/libavcodec/riscv/vc1dsp_rvv.S b/libavcodec/riscv/vc1dsp_rvv.S index 4b7ab33307..7e1fb84b0c 100644 --- a/libavcodec/riscv/vc1dsp_rvv.S +++ b/libavcodec/riscv/vc1dsp_rvv.S @@ -257,6 +257,9 @@ func ff_vc1_inv_trans_8x4_rvv, zve32x vsetivli zero, 4, e16, mf2, ta, ma vlseg8e16.v v0, (a2) jal t0, ff_vc1_inv_trans_8_rvv + .irp n,0,1,2,3,4,5,6,7 + vssra.vi v\n, v\n, 3 + .endr vsseg8e16.v v0, (a2) addi a3, a2, 1 * 8 * 2 vsetivli zero, 8, e16, m1, ta, ma @@ -266,10 +269,6 @@ func ff_vc1_inv_trans_8x4_rvv, zve32x addi a5, a2, 3 * 8 * 2 vle16.v v2, (a4) vle16.v v3, (a5) - .irp n,0,1,2,3 - # shift 4 vectors of 8 elems after transpose instead of 8 of 4 - vssra.vi v\n, v\n, 3 - .endr li t1, 7 jal t0, ff_vc1_inv_trans_4_rvv add a3, a1, a0