Cibiyar fasahar kwamfuta ta kwalejin kimiyya ta kasar Sin ta gabatar da aikin XiangShan, wanda tun daga shekarar 2020 ke ci gaba da samar da na'ura mai inganci mai inganci bisa tsarin gine-gine na RISC-V (RV64GC). Abubuwan haɓaka aikin suna buɗe ƙarƙashin lasisin MulanPSL 2.0 mai izini.
Aikin ya buga bayanin tubalan kayan masarufi a cikin yaren Chisel, wanda aka fassara zuwa Verilog, aiwatar da tunani dangane da FPGA, da hotuna don kwaikwayon aikin guntu a cikin buɗe Verilog na'urar kwaikwayo Verilator. Hakanan ana samun zane-zane da kwatancin gine-gine (a cikin duka takardu sama da 400 da layukan layukan 50), amma yawancin takaddun cikin Sinanci ne. Ana amfani da Debian GNU/Linux azaman tsarin aiki da aka yi amfani da shi don gwada aiwatar da tushen FPGA.
XiangShan ya yi iƙirarin shine mafi girman guntu RISC-V, wanda ya zarce SiFive P550. A wannan watan an shirya don kammala gwaji akan FPGA kuma a fitar da guntu samfurin 8-core da ke aiki a 1.3 GHz kuma TSMC ta kera ta ta amfani da fasahar tsari na 28nm, mai suna "Yanqi Lake". Guntu ya haɗa da cache 2MB, mai sarrafa ƙwaƙwalwar ajiya tare da goyan bayan ƙwaƙwalwar DDR4 (har zuwa 32GB na RAM) da ƙirar PCIe-3.0-x4.
An kiyasta aikin guntu na farko a cikin gwajin SPEC2006 a 7/Ghz, wanda yayi daidai da kwakwalwan kwamfuta na ARM Cortex-A72 da Cortex-A73. A ƙarshen shekara, ana shirin samar da samfur na biyu na "Tafkin Kudu" tare da ingantaccen tsarin gine-gine, wanda za'a canza shi zuwa SMIC tare da fasahar tsari na 14nm da karuwa a mita zuwa 2 GHz. Ana sa ran samfurin na biyu zai yi a 2006/Ghz a cikin gwajin SPEC10, wanda ke kusa da ARM Cortex-A76 da Intel Core i9-10900K masu sarrafawa, kuma sun fi SiFive P550, mafi sauri RISC-V CPU, wanda ke da aikin 8.65/Ghz.
Ka tuna cewa RISC-V yana ba da tsarin koyarwa na inji mai sassauƙa wanda ke ba da damar gina na'urori masu sarrafawa don aikace-aikacen sabani ba tare da buƙatar biyan kuɗi ko sanya sharuɗɗan amfani ba. RISC-V yana ba ku damar ƙirƙirar SoCs da na'urori masu sarrafawa gabaɗaya. A halin yanzu, dangane da ƙayyadaddun RISC-V, kamfanoni daban-daban da al'ummomin ƙarƙashin lasisi daban-daban na kyauta (BSD, MIT, Apache 2.0) suna haɓaka bambance-bambancen dozin da yawa na cores microprocessor, SoCs kuma an riga an samar da kwakwalwan kwamfuta. Tsarukan aiki tare da ingantaccen tallafi don RISC-V sun haɗa da Linux (yanzu tun lokacin fitowar Glibc 2.27, binutils 2.30, gcc 7 da Linux kernel 4.15) da FreeBSD.
source: budenet.ru