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 6C32F46424 for ; Wed, 15 Nov 2023 09:00:16 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 1E84D68CC51; Wed, 15 Nov 2023 11:00:14 +0200 (EET) Received: from mail-qv1-f45.google.com (mail-qv1-f45.google.com [209.85.219.45]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id F23A568CBC9 for ; Wed, 15 Nov 2023 11:00:07 +0200 (EET) Received: by mail-qv1-f45.google.com with SMTP id 6a1803df08f44-677a0ac3797so26290956d6.1 for ; Wed, 15 Nov 2023 01:00:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700038806; x=1700643606; darn=ffmpeg.org; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=+K3h9bnku/+K0KF/dPd9iEMeYbTq+mVDeFXVak7eyUo=; b=g17dLUKVTlCYbVVhv1pr2PpBvhNoNnYH1js5l0JCcFefzRwvHHJAzqzc/k4RSzMUBI tzbq0bkntDl7x+xN5ywR7I3xWu3YArIqtrhth82zdYn3kVqgqKunJhq4JCuM5FQVI24+ lst/eITTheF+r1A/uzSRjQ7PTC7NBQv3zQoU2GW5k8ocTqHJXKlED2xPjjMCBQAxInsc ws0W4EmKfFjKLQ1YnRd2P1rT52MxDwegx/q8dKv0xmYhH2vqFlJaglkokc5ujbNZ7rkW ChARCOQ1HC+SLEiur5IxxMTVPACKwNUslWwMmkmpdlJ7kk/EqDA2nTwmArJuQllo6+5W Q5XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700038806; x=1700643606; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=+K3h9bnku/+K0KF/dPd9iEMeYbTq+mVDeFXVak7eyUo=; b=Jk6eSEiY1kgISfcyHzUFfmDo8uEMYEd0lomZyvZMqhUStPyIhLjnyqLV9cqadViQ3w MBVB6FV8Cj2LOyJSUl6CmaXQNCntNLIDFTCYeQ+VXmZnpTbvZbjn8kWeJxzllrPNPkdL 5CggWODaTiU6VFcR1JnBL9gIz9SJNPOldfMhBzvYvsXbhekMyGm+aEhmvSGilvS16O4V RI4+SUH4M3pr22osL7l+4h8abw3/2SebtDiR9HIkrgOuZNKevoRJ+MWEYy5oOZXDn5Z0 r1qDXlNp4PTjVcBPNMf1RB165a9V6lz+VNyD8FXE0HY/hx5QXJpPc5mG4/ofXMIWx3+R h+kA== X-Gm-Message-State: AOJu0YzLjBeiltyjLPPEzaEXK7OWadVNUQwyo/iYY3wbMR00ZJGvCbBE 0Yg+8WoRNto6hmMohedMAcST+fMVrOXeXvXHyXo= X-Google-Smtp-Source: AGHT+IGPMvOoYqtocwK+a04g4A3khD09oR76kac56LhY/+oTfLGSFPYzy3l0xLqZqKK6wQcJnvVm84fUAIbkwnMRPT8= X-Received: by 2002:ad4:4bad:0:b0:66d:61c3:8ca4 with SMTP id i13-20020ad44bad000000b0066d61c38ca4mr4646823qvw.15.1700038806309; Wed, 15 Nov 2023 01:00:06 -0800 (PST) MIME-Version: 1.0 References: <3257813.aeNJFYEL58@basile.remlab.net> In-Reply-To: <3257813.aeNJFYEL58@basile.remlab.net> From: flow gg Date: Wed, 15 Nov 2023 16:59:55 +0800 Message-ID: To: =?UTF-8?Q?R=C3=A9mi_Denis=2DCourmont?= , FFmpeg development discussions and patches Content-Type: multipart/mixed; boundary="00000000000027c940060a2d2133" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: Re: [FFmpeg-devel] [PATCH] af_afir: RISC-V V fcmul_add 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" Archived-At: List-Archive: List-Post: --00000000000027c940060a2d2133 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Okay, I have updated these issues in the patch. R=C3=A9mi Denis-Courmont =E4=BA=8E2023=E5=B9=B411=E6=9C= =8813=E6=97=A5=E5=91=A8=E4=B8=80 23:35=E5=86=99=E9=81=93=EF=BC=9A > Hi, > > Le maanantaina 13. marraskuuta 2023, 11.43.01 EET flow gg a =C3=A9crit : > > Sorry for the long delay in responding. > > No problem. Working with T-Head C910 (or C920?) cores is very tedious. I > gave > up on that and switched over to Kendryte K230 (based on C908) now. > > > How is the modified patch now? > > It looks better, but some minute improvements are still possible. > > > no longer using register stride(learn from your code) and have switched > to > > shNadd instead. > > > > (using m4 and m2 as they are slightly faster than m8 and m4) > > > > benchmark: > > fcmul_add_c: 2179 > > fcmul_add_rvv_f32: 1652 > > > diff --git a/libavfilter/af_afirdsp.h b/libavfilter/af_afirdsp.h > > index 4208501393..d2d1e909c1 100644 > > --- a/libavfilter/af_afirdsp.h > > +++ b/libavfilter/af_afirdsp.h > > @@ -34,6 +34,7 @@ typedef struct AudioFIRDSPContext { > > } AudioFIRDSPContext; > > > > void ff_afir_init_x86(AudioFIRDSPContext *s); > > +void ff_afir_init_riscv(AudioFIRDSPContext *s); > > Nit: please stick to alphabetical order like most similar code. > > > > > static void fcmul_add_c(float *sum, const float *t, const float *c, > > ptrdiff_t len) > > { > > @@ -76,6 +77,8 @@ static av_unused void ff_afir_init(AudioFIRDSPContext > > *dsp) > > > > #if ARCH_X86 > > ff_afir_init_x86(dsp); > > +#elif ARCH_RISCV > > + ff_afir_init_riscv(dsp); > > Ditto. > > > #endif > > } > > > > diff --git a/libavfilter/riscv/Makefile b/libavfilter/riscv/Makefile > > new file mode 100644 > > index 0000000000..0b968a9c0d > > --- /dev/null > > +++ b/libavfilter/riscv/Makefile > > @@ -0,0 +1,2 @@ > > +OBJS +=3D riscv/af_afir_init.o > > +RVV-OBJS +=3D riscv/af_afir_rvv.o > > diff --git a/libavfilter/riscv/af_afir_init.c > > b/libavfilter/riscv/af_afir_init.c new file mode 100644 > > index 0000000000..13df8341e7 > > --- /dev/null > > +++ b/libavfilter/riscv/af_afir_init.c > > @@ -0,0 +1,39 @@ > > +/* > > + * Copyright (c) 2023 Institue of Software Chinese Academy of Sciences > > (ISCAS). > > + * > > + * This file is part of FFmpeg. > > + * > > + * FFmpeg is free software; you can redistribute it and/or > > + * modify it under the terms of the GNU Lesser General Public > > + * License as published by the Free Software Foundation; either > > + * version 2.1 of the License, or (at your option) any later version. > > + * > > + * FFmpeg is distributed in the hope that it will be useful, > > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > > + * Lesser General Public License for more details. > > + * > > + * You should have received a copy of the GNU Lesser General Public > > + * License along with FFmpeg; if not, write to the Free Software > > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA > 02110-1301 > > USA > > + */ > > + > > +#include > > + > > +#include "config.h" > > +#include "libavutil/attributes.h" > > +#include "libavutil/cpu.h" > > +#include "libavfilter/af_afirdsp.h" > > + > > +void ff_fcmul_add_rvv(float *sum, const float *t, const float *c, > > + ptrdiff_t len); > > + > > +av_cold void ff_afir_init_riscv(AudioFIRDSPContext *s) > > +{ > > +#if HAVE_RVV > > + int flags =3D av_get_cpu_flags(); > > + > > + if (flags & AV_CPU_FLAG_RVV_F32) > > You need to check for Zba as well here. I doubt that we'll see hardware > with V > and without Zba in real life, but for the sake of correctness... > > > + s->fcmul_add =3D ff_fcmul_add_rvv; > > +#endif > > +} > > diff --git a/libavfilter/riscv/af_afir_rvv.S > > b/libavfilter/riscv/af_afir_rvv.S new file mode 100644 > > index 0000000000..078cac8e7e > > --- /dev/null > > +++ b/libavfilter/riscv/af_afir_rvv.S > > @@ -0,0 +1,61 @@ > > +/* > > + * Copyright (c) 2023 Institue of Software Chinese Academy of Sciences > > (ISCAS). > > + * > > + * This file is part of FFmpeg. > > + * > > + * FFmpeg is free software; you can redistribute it and/or > > + * modify it under the terms of the GNU Lesser General Public > > + * License as published by the Free Software Foundation; either > > + * version 2.1 of the License, or (at your option) any later version. > > + * > > + * FFmpeg is distributed in the hope that it will be useful, > > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > > + * Lesser General Public License for more details. > > + * > > + * You should have received a copy of the GNU Lesser General Public > > + * License along with FFmpeg; if not, write to the Free Software > > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA > 02110-1301 > > USA > > + */ > > + > > +#include "libavutil/riscv/asm.S" > > + > > +// void ff_fcmul_add(float *sum, const float *t, const float *c, int > len) > > +func ff_fcmul_add_rvv, zve32f > > + li t1, 32 > > +1: > > + vsetvli t0, a3, e64, m4, ta, ma > > You can set SEW=3D32 and corresponding LMUL here. Then you can remove all > other > VSETVLI instances below. (Note that this will NOT work on draft 0.7.1 > hardware, but it does work on conformant hardware.) > > > + vle64.v v12, (a0) > > This requires 64-bit alignment. I don't know if this is correct for this > specific filter, so I leave it to other people to comment here. > > > + sub a3, a3, t0 > > + vsetvli zero, zero, e32, m2, ta, ma > > + vnsrl.vx v8, v12, zero > > + vnsrl.vx v10, v12, t1 > > + vsetvli zero, zero, e64, m4, ta, ma > > + vle64.v v12, (a1) > > + sh3add a1, t0, a1 > > + vsetvli zero, zero, e32, m2, ta, ma > > + vnsrl.vx v0, v12, zero > > + vnsrl.vx v2, v12, t1 > > + vsetvli zero, zero, e64, m4, ta, ma > > + vle64.v v12, (a2) > > + sh3add a2, t0, a2 > > + vsetvli zero, zero, e32, m2, ta, ma > > + vnsrl.vx v4, v12, zero > > + vnsrl.vx v6, v12, t1 > > + vfmacc.vv v8, v0, v4 > > + vfnmsac.vv v8, v2, v6 > > + vfmacc.vv v10, v0, v6 > > Swap the two instructions above for better pipeline utilisation on > in-order > CPUs. > > > + vfmacc.vv v10, v2, v4 > > + vsseg2e32.v v8, (a0) > > + sh3add a0, t0, a0 > > + bgtz a3, 1b > > + > > + flw fa0, 0(a1) > > + flw fa1, 0(a2) > > + flw fa2, 0(a0) > > + fmul.s fa0, fa0, fa1 > > + fadd.s fa2, fa2, fa0 > > It won't make much difference, but you can use a fused multiply-add here. > > > + fsw fa2, 0(a0) > > + > > + ret > > +endfunc > > While you're at it, this looks like it could easily be adapted for the > double > precision version. In fact, it will be simpler, since you will have to us= e > vlseg2e64 rather than vle128.v+vnsrl.vx+vnsrl.vx. But if you decide to > implement that too, please keep it a separate patch. > > -- > =E3=83=AC=E3=83=9F=E3=83=BB=E3=83=87=E3=83=8B-=E3=82=AF=E3=83=BC=E3=83=AB= =E3=83=A2=E3=83=B3 > http://www.remlab.net/ > > > > --00000000000027c940060a2d2133 Content-Type: text/x-patch; charset="US-ASCII"; name="af_afir-RISC-V-V-fcmul_add.patch" Content-Disposition: attachment; filename="af_afir-RISC-V-V-fcmul_add.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_lozj785w0 RnJvbSA2NmU2ODFiNmQ4NWE5ZmZlYWQxM2Y1YmMyMTk3NWY3MTEwZjZjODRmIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBzdW55dWVjaGkgPHN1bnl1ZWNoaUBpc2Nhcy5hYy5jbj4KRGF0 ZTogRnJpLCAzIE5vdiAyMDIzIDEwOjM1OjUzICswODAwClN1YmplY3Q6IFtQQVRDSF0gYWZfYWZp cjogUklTQy1WIFYgZmNtdWxfYWRkCgpiZW5jaG1hcms6CmZjbXVsX2FkZF9jOiAyMTc5CmZjbXVs X2FkZF9ydnZfZjMyOiAxNjUyCi0tLQogbGliYXZmaWx0ZXIvYWZfYWZpcmRzcC5oICAgICAgICAg fCAgNSArKy0KIGxpYmF2ZmlsdGVyL3Jpc2N2L01ha2VmaWxlICAgICAgIHwgIDIgKysKIGxpYmF2 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