RISC-V V扩展1.0版本环境搭建与测试
...大约 4 分钟RISC-V
0. 准备
在重装了n次后踩的坑
- 虚拟机：Ubuntu 20.04
- 内存分配：建议16G+ （或通过分配swap解决）
- 硬盘分配：建议100G+
1. 下载相关依赖
apt-get install autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev
2. 下载安装工具链
下载riscv-gnu-toolchain
git clone -b rvv-next https://github.com/riscv/riscv-gnu-toolchain --progress
cd riscv-gnu-toolchain
这个仓库使用子模块，将自动在需要的时候加载，所以并不需要 --recursive or git submodule update --init --recursive 来一次性下完。
下载riscv-gcc
git submodule update --init --progress --remote riscv-gcc
cd riscv-gcc
git fetch origin
git checkout origin/riscv-gcc-10.1-rvv-dev
下载riscv-gcc
git submodule update --init --progress --remote riscv-binutils
cd ../riscv-binutils
git fetch origin
git checkout origin/rvv-1.0.x-zfh
安装
cd riscv-gnu-toolchain
./configure --prefix=/opt/riscv --with-arch=rv64gcv --with-abi=lp64d --with-multilib-generator="rv64gcv-lp64d--"
make -j $(nproc) >make.log 2>&1
make linux -j $(nproc) >make_linux.log 2>&1
如果make -j $(nproc) 失败，试试执行make -j 1
分配空间不足会提示
g++: fatal error: Killed signal terminated program cc1plus错误解决方案：1. g++: fatal error: Killed signal terminated program cc1plus
提示
这一步本人耗时6-7小时，给出本人电脑配置，方便参考时间
处理器：Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz
内存：16G
显卡：GTX 1060 （好像没用到）
中途可能会在部分环节假死好久甚至一两个小时，不用管它，可以用free -h产看内存占用情况
设置环境变量
vim ~/.bashrc
添加如下路径
记得修改为对应路径
export RISCV="/opt/riscv"
export PATH=$PATH:$RISCV/bin
使环境变量生效
source ~/.bashrc
3. 安装 Spike 和 pk
在spike路径下打开终端：
apt-get install device-tree-compiler
mkdir build
cd build
../configure --prefix=$RISCV
make
[sudo] make install
在pk路径下打开终端：
mkdir build
cd build
../configure --prefix=$RISCV --host=riscv64-unknown-elf
make
make install
4. 测试编译
编写简单测试函数add.c
echo ' #include <stdio.h> int f(int x){ return x+3; } int main(){ printf("hello riscv\n"); printf("%d\n",f(3)); }' > add.c使用
riscv64-unknown-elf-gcc编译RISC-V可执行文件riscv64-unknown-elf-gcc add.c -o add使用
spike pk模拟运行RISC-V指令spike pk add
image-20220808135230132 使用
riscv64-unknown-elf-gcc生成RISC-V指令的汇编代码riscv64-unknown-elf-gcc -S add.c -o add.s
image-20220808135205903
5. 测试向量指令
新建汇编代码
v_test.s#void #saxpy(size_t n, const float a, const float *x, float *y) # { # size_t i; # for (i=0; i<n; i++) y[i] = a * x[i] + y[i]; # } # register arguments: # a0 n # fa0 a # a1 x # a2 y .global saxpy saxpy: vsetvli a4, a0, e32, m8,ta,ma vle32.v v0, (a1) sub a0, a0, a4 slli a4, a4, 2 add a1, a1, a4 vle32.v v8, (a2) vfmacc.vf v8, fa0, v0 vse32.v v8, (a2) add a2, a2, a4 bnez a0, saxpy ret编译
riscv64-unknown-elf-as -march=rv64gcv --mabi=lp64d v_test.s -o v_test.o新建c文件
callsaxpy.c#include <stddef.h> #include <stdio.h> extern void saxpy(size_t n, const float a, const float *x, float *y); int main(){ size_t size=3; const float a=1.0; const float array1[]={1.0,2.0,3.0}; float array2[]={1.0,2.0,3.0}; for(int i =0;i<size;i++){ printf("%f\n", array2[i]); } printf("----------------\n"); //调用saxpy函数 saxpy(size,a,array1,array2); for(int i =0;i<size;i++){ printf("%f\n", array2[i]); } return 0; }编译
riscv64-unknown-elf-gcc -c callsaxpy.c -o callsaxpy.o生成可执行文件
riscv64-unknown-elf-gcc -static v_test.o callsaxpy.o -o out
或者跳过245直接执行
riscv64-unknown-elf-gcc -g v_test.s callsaxpy.c -o out
运行
spike --isa=RV64GCV pk out
5. qemu
wget https://download.qemu.org/qemu-7.1.0.tar.bz2
tar -jxvf qemu-7.1.0.tar.bz2
./configure --target-list=riscv64-softmmu,riscv64-linux-user --prefix=/home/jiaolong/riscvv/qemu
报错：ERROR: glib-2.56 gthread-2.0 is required to compile QEMU
目前尝试两种解决办法：
- 使用Ubuntu18.04
- 手动下载glib
Ubuntu18.04
wget https://download.qemu.org/qemu-7.1.0.tar.bz2
tar -jxvf qemu-7.1.0.tar.bz2
./configure --target-list=riscv64-linux-user,riscv64-softmmu --prefix=/usr/local/qemu
apt-get install libglib2.0-dev
apt-get install libpixman-1-dev
如果想支持rvv则：加上-cpu rv64,v=true
./qemu-riscv64 -cpu rv64,v=true -L $RISCV/sysroot ../../../test/out
手动编译
在尝试apt-get install 安装失败后，使用手动编译
wget http://ftp.acc.umu.se/pub/GNOME/sources/glib/2.56/glib-2.56.4.tar.xz
tar -vxf glib-2.56.4.tar.xz
./configure
再次报错：No package 'libffi' found
继续下载
wget https://github.com/libffi/libffi/releases/download/v3.4.2/libffi-3.4.2.tar.gz
tar -vxf libffi-3.4.2.tar.gz
./configure --prefix=/usr/local/libffi
make
make install
export LIBFFI_LIBS=/usr/local/libffi/lib/libffi.la
export PKG_CONFIG_PATH=/usr/local/libffi/lib/pkgconfig
再次报错：configure: error: *** Could not find libmount
wget http://ftp.ntu.edu.tw/pub/linux/utils/util-linux/v2.38/util-linux-2.38.tar.gz
尝试了一下，搞不定，直接禁用掉--enable-libmount=no
No package 'libpcre' found
PCRE download | SourceForge.net
./configure --prefix=/usr/local/pcre --enable-unicode-properties
make
make install
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/pcre/lib/pkgconfig
--enable-unicode-properties
qemu-system-riscv64 \
-nographic \
-machine virt \
-smp 4 \
-m 2G \
-kernel Fedora-Minimal-Rawhide-*-fw_payload-uboot-qemu-virt-smode.elf \
-bios none \
-object rng-random,filename=/dev/urandom,id=rng0 \
-device virtio-rng-device,rng=rng0 \
-device virtio-blk-device,drive=hd0 \
-drive file=Fedora-Minimal-Rawhide-20200108.n.0-sda.raw,format=raw,id=hd0 \
-device virtio-net-device,netdev=usernet \
-netdev user,id=usernet,hostfwd=tcp::10000-:22 \
-fsdev local,security_model=passthrough,id=fsdev0,path=/home/jiaolong/riscvv/hostshare \
-device virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare
报错记录
1. g++: fatal error: Killed signal terminated program cc1plus
参考链接：