Update README.md with installation instructions (#14)

* Upstream my workaround of running this on my Macbook (#2)

* Update Makefile

* Update README.md

* Update README.md

* Update README.md

---------

Co-authored-by: Tiezhen WANG <38108242+xianbaoqian@users.noreply.github.com>

Makefile

@@ -22,4 +22,4 @@ compile_%:
 # TODO: Get gtkwave visualizaiton
 
 show_%: %.vcd %.gtkw
-	gtkwave $^
+	gtkwave $^

README.md

@@ -313,7 +313,11 @@ RET                            ; end of kernel
 
 # Simulation
 
-tiny-gpu is setup to simulate the execution of both of the above kernels. Before simulating, you'll need to install [iverilog](https://steveicarus.github.io/iverilog/usage/installation.html) and [cocotb](https://docs.cocotb.org/en/stable/install.html).
+tiny-gpu is setup to simulate the execution of both of the above kernels. Before simulating, you'll need to install [iverilog](https://steveicarus.github.io/iverilog/usage/installation.html) and [cocotb](https://docs.cocotb.org/en/stable/install.html):
+
+- Install Verilog compilers with `brew install icarus-verilog` and `pip3 install cocotb`
+- Download the latest version of sv2v from https://github.com/zachjs/sv2v/releases, unzip it and put the binary in $PATH.
+- Run `mkdir build` in the root directory of this repository.
 
 Once you've installed the pre-requisites, you can run the kernel simulations with `make test_matadd` and `make test_matmul`.