From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 2249446441 for ; Mon, 17 Jul 2023 19:03:21 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 0E34668C419; Mon, 17 Jul 2023 22:03:19 +0300 (EEST) Received: from ursule.remlab.net (vps-a2bccee9.vps.ovh.net [51.75.19.47]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 2BC9368C419 for ; Mon, 17 Jul 2023 22:03:13 +0300 (EEST) Received: from basile.remlab.net (localhost [IPv6:::1]) by ursule.remlab.net (Postfix) with ESMTP id B707AC0014 for ; Mon, 17 Jul 2023 22:03:12 +0300 (EEST) From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= To: ffmpeg-devel@ffmpeg.org Date: Mon, 17 Jul 2023 22:03:12 +0300 Message-Id: <20230717190312.33395-1-remi@remlab.net> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] lavc/audiodsp: rework RISC-V V scalar product 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Take vector reduction out of the loop and unroll. Before: audiodsp.scalarproduct_int16_c: 12321.0 audiodsp.scalarproduct_int16_rvv_i32: 4175.7 After: audiodsp.scalarproduct_int16_c: 12320.5 audiodsp.scalarproduct_int16_rvv_i32: 1230.2 --- libavcodec/riscv/audiodsp_rvv.S | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/libavcodec/riscv/audiodsp_rvv.S b/libavcodec/riscv/audiodsp_rvv.S index af1e07bef9..f7eba2114f 100644 --- a/libavcodec/riscv/audiodsp_rvv.S +++ b/libavcodec/riscv/audiodsp_rvv.S @@ -21,21 +21,22 @@ #include "libavutil/riscv/asm.S" func ff_scalarproduct_int16_rvv, zve32x - vsetivli zero, 1, e32, m1, ta, ma - vmv.s.x v8, zero + vsetvli t0, zero, e32, m8, ta, ma + vmv.v.x v8, zero + vmv.s.x v0, zero 1: - vsetvli t0, a2, e16, m1, ta, ma + vsetvli t0, a2, e16, m4, tu, ma vle16.v v16, (a0) sub a2, a2, t0 vle16.v v24, (a1) sh1add a0, t0, a0 - vwmul.vv v0, v16, v24 + vwmacc.vv v8, v16, v24 sh1add a1, t0, a1 - vsetvli zero, t0, e32, m2, ta, ma - vredsum.vs v8, v0, v8 bnez a2, 1b - vmv.x.s a0, v8 + vsetvli t0, zero, e32, m8, ta, ma + vredsum.vs v0, v8, v0 + vmv.x.s a0, v0 ret endfunc -- 2.40.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".