学习RISC-V V扩展(RISC-V Vector Extension,即RVV)很长时间了,刚入门的时候,对函数进行RVV优化时,总是弄不清使用什么指令好,后面才慢慢熟悉,所以想着把这块知识总结一下,于是准备将RVV v1.0 的spec翻译一下(注意:翻译并没有一字一句的翻,大略按照自己理解的来翻译的),穿插讲了相关的一些知识点。英语好的朋友...
本文主要介绍OpenBLAS的RISC-V Vector extension(v 扩展/向量扩展)两个版本:RISC-V Vector extension 0.7.1.和RISC-V Vector extension 1.0.分别在SG2042和K1上的验证。 首先是准备了一台x86_64的设备作交叉编译准备,使用gcc 13.3.0,工具链为:Xuantie-900系列工具链,具体版本将会在下方说明。 一、OpenBLAS C910...
gcc version 10.2.0 (Xuantie-900 linux-5.10.4 glibc gcc Toolchain V2.6.1 B-20220906) 4.2 编译 {yourToolchainDir}/bin/riscv64-unknown-linux-gnu-gcc -march=rv64gcv0p7xthead -static add.c -o add.elf 注:c906 只支持risc-v vector 0.7.1 扩展,需要在编译选项中加上-march=rv64gcv0p7xt...
此外，SiFive还提供了一个名为Recode的转换软件（translation utility），它可以自动将SIMD代码（legacy SIMD code）转换为V-spec矢量指令集（V-spec vector assembly）。结语：SiFive再出新品，RISC-V CPU市场生机涌现 如今，国内外对RISC-V架构的处理器都抱有很大期待，人们希望能通过RISC-V架构逐渐抢占ARM和x86市...
vtype-format.adoc Clarified handling of illegal vtype values. Sep 14, 2021 README CC-BY-4.0 license riscv-v-spec Working draft of the proposed RISC-V V vector extension. Version 1.0has been frozen and at this time is undergoing public review. Version 1.0 is considered stable enough to be...
作为一款RISC-V架构的高性能融合处理器核,X100将被用于进迭时空后续的芯片中,并赋能高性能CPU、边缘计算、泛智能机器人、自动驾驶等对计算性能有较高要求的场景。 01 X100特性 在通用计算性能上,X100的单核跑分达到7.5 SPECint2k6/GHz,Coremark达到7.7/MHz,Dhrystone达到6.5DMIPS/MHz,最多可以支持16个核同步计算。
Each hart supporting the vector extension defines three parameters: The maximum size of a single vector element in bits, ELEN, which must be a power of 2. The number of bits in a vector register, VLEN≥ ELEN, which must be a power of 2. The striping distance in bits, SLEN, which ...
vector extensionalgorithm accelerationAs the pre-order step of convolutional neural network (CNN) computing, image preprocessing is indispensable but time-consuming. To accelerate image preprocessing, a method based on RISC-V vector extension was proposed to accelerate eleven image preprocessing algorithms ...
据预测,到 2030 年,RISC-V 的整体份额将达到 20%,在 AI 加速器中的占比有望突破 50%。 在大会上,达摩院玄铁拿出了新一代旗舰处理器、也是首款服务器级处理器C930。 C930 通用性能算力达到 SPECint2006 基准测试15/GHz。什么概念?倪光南院士指出,RISC-V 要真正进入高性能计算市场,RISC-V 以 SPECint 2006...
Min: The RISC-V vector extensions, version 0.8, are stable enough that compilers support them. Both GCC and LLVM support the existing 0.8 version of the spec. Final versions of the compilers will be available when the RISC-V Vector Extension specification has been finalized. ...