Add Bit-Vector install in readme

Cores-SweRV/demo/Readme.md

@@ -31,9 +31,32 @@ sudo make install
 
 `sudo apt-get install -y ninja-build`
 
+## Gen quasar core
+
+```bash
+git clone https://github.com/Lampro-Mellon/Quasar.git
+cd tools
+vim configs/quasar.config # to config the core
+make clean
+make conf
+make sbt_
+# Quasar/generated_rtl/quasar_wrapper.sv
+```
+
+## install Bit-Vector
+
+```bash
+wget https://cpan.metacpan.org/authors/id/S/ST/STBEY/Bit-Vector-7.4.tar.gz
+tar -xvf
+cd 
+perl Makefile.PL
+make 
+sudo make install
+```
+
 ## build and install riscv tools
 
-* Opetion1 :https://github.com/riscv-collab/riscv-gnu-toolchain.git
+* Opetion1 :<https://github.com/riscv-collab/riscv-gnu-toolchain.git>
 
 ```bash
 sudo make clean
@@ -55,4 +78,4 @@ sudo su
 export RISCV=/opt/riscv
 export MAKEFLAGS="-j12"
 ./build-rv32ima.sh
-```
+```