From patchwork Sat Oct 1 12:32:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?R=C3=A9mi_Denis-Courmont?= X-Patchwork-Id: 38490 Delivered-To: ffmpegpatchwork2@gmail.com Received: by 2002:a05:6a20:3b1c:b0:96:9ee8:5cfd with SMTP id c28csp251986pzh; Sat, 1 Oct 2022 05:32:50 -0700 (PDT) X-Google-Smtp-Source: AMsMyM7mV3HzgvLxJWCyR9IZscsYBEbm97Qskbnyu04PUtriZCdSUJS92sVIWqDYxv143i/yfGcn X-Received: by 2002:a17:906:847b:b0:773:db0f:d533 with SMTP id hx27-20020a170906847b00b00773db0fd533mr9597798ejc.0.1664627570063; Sat, 01 Oct 2022 05:32:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1664627570; cv=none; d=google.com; s=arc-20160816; b=Ubc9nNwbojOVhKQuRPjoA2k86I7lpNw7y7irXA0+eTL3lH8yivF5CwWwYpHX99d9fk P9iNdp6KEj8lldDiu1W70BkAAgzHNWxkoFIPtNJp51guFq6gaxbickT2HhBYPgKMA64U tj9HK4ECqzYWqjEzRydPHHsP10K6/1/jo567EFN0rtGtEmXh4sp8XuF00vUU09cp2GYX Q6QOIyZVd9t83xPrX4WSexZ+4sxVjbfV6KqeYV+qh/636MntzqY2pfIIheLQRuVZJ1BR CwC5CxSyD+RrcgrZe4QaziIfTgpZokvOaE3JCGwP/5WQyNBHV5NvJ0gs223tRHfpnl+e c+qQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:reply-to:list-subscribe :list-help:list-post:list-archive:list-unsubscribe:list-id :precedence:subject:mime-version:references:in-reply-to:message-id :date:to:from:delivered-to; bh=M2jI2A/Dq3519FGQOEH2TJQ/sNn9MURPubyxDw8d3Jg=; b=KdEmRGf/nNQ8U+3x9YLYiUXlPvFLh1ZDN3bDx6MpCB1pl1XaoTKW1PvH/cNYPt0xQk AyKWeSgyd0n104C86CdqsisySNnRUwgfeyJ+gpOQ4EYQGkLKLrxfnUNgjseAi6dMM4A/ EbK//6sHAovYBROizB+oIqNbvraarcV6n+5FupjabsUpKCiKQod+I3lUFbX4UgQg87P2 PqnR9AyWaPgVIcwN4tmjL1UjiOXnhzm7lIwG2slScxLUeY6VOddkps0I7LPBgDDw7fGv Il1A6y/PIvVNERwpD+MTDyH6LIR2BIKqgFoKt1F1mgcLWMoW8t1rosS3npbkkK/WW1Hz CPYg== ARC-Authentication-Results: i=1; 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 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id nb40-20020a1709071ca800b0074b26b6bbbcsi4035378ejc.419.2022.10.01.05.32.49; Sat, 01 Oct 2022 05:32:50 -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 1463368BAD5; Sat, 1 Oct 2022 15:32:47 +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 85B5568BAFA for ; Sat, 1 Oct 2022 15:32:40 +0300 (EEST) Received: from basile.remlab.net (localhost [IPv6:::1]) by ursule.remlab.net (Postfix) with ESMTP id 314B3C0029 for ; Sat, 1 Oct 2022 15:32:40 +0300 (EEST) From: remi@remlab.net To: ffmpeg-devel@ffmpeg.org Date: Sat, 1 Oct 2022 15:32:38 +0300 Message-Id: <20221001123239.33042-2-remi@remlab.net> X-Mailer: git-send-email 2.37.2 In-Reply-To: <5606030.DvuYhMxLoT@basile.remlab.net> References: <5606030.DvuYhMxLoT@basile.remlab.net> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 2/3] lavu/riscv: helper macro for VTYPE encoding 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: W3YMsUdRKtGh From: Rémi Denis-Courmont On most cases, the vector type (VTYPE) for the RISC-V Vector extension is supplied as an immediate value, with either of the VSETVLI or VSETIVLI instructions. There is however a third instruction VSETVL which takes the vector type from a general purpose register. That is so the type can be selected at run-time. This introduces a macro to load a (valid) vector type into a register. The syntax follows that of VSETVLI and VSETIVLI, with element size, group multiplier, then tail and mask policies. --- libavutil/riscv/asm.S | 75 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/libavutil/riscv/asm.S b/libavutil/riscv/asm.S index de5e1ad0a6..f8c9f6749b 100644 --- a/libavutil/riscv/asm.S +++ b/libavutil/riscv/asm.S @@ -94,3 +94,78 @@ shnadd 3, \rd, \rs1, \rs2 .endm #endif + + /* Convenience macro to load a Vector type (vtype) as immediate */ + .macro lvtypei rd, e, m=m1, tp=tu, mp=mu + + .ifc \e,e8 + .equ ei, 0 + .else + .ifc \e,e16 + .equ ei, 8 + .else + .ifc \e,e32 + .equ ei, 16 + .else + .ifc \e,e64 + .equ ei, 24 + .else + .error "Unknown element type" + .endif + .endif + .endif + .endif + + .ifc \m,m1 + .equ mi, 0 + .else + .ifc \m,m2 + .equ mi, 1 + .else + .ifc \m,m4 + .equ mi, 2 + .else + .ifc \m,m8 + .equ mi, 3 + .else + .ifc \m,mf8 + .equ mi, 5 + .else + .ifc \m,mf4 + .equ mi, 6 + .else + .ifc \m,mf2 + .equ mi, 7 + .else + .error "Unknown multiplier" + .equ mi, 3 + .endif + .endif + .endif + .endif + .endif + .endif + .endif + + .ifc \tp,tu + .equ tpi, 0 + .else + .ifc \tp,ta + .equ tpi, 64 + .else + .error "Unknown tail policy" + .endif + .endif + + .ifc \mp,mu + .equ mpi, 0 + .else + .ifc \mp,ma + .equ mpi, 128 + .else + .error "Unknown mask policy" + .endif + .endif + + li \rd, (ei | mi | tpi | mpi) + .endm