updated README and Makefile environment settings

README.md

@@ -1,6 +1,3 @@
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 # Vortex RISC-V GPGPU
 
 Vortex currently supported RISC-V RV32I ISA
@@ -16,3 +13,46 @@ Vortex currently supported RISC-V RV32I ISA
 /SimX contains a cycle-approximate simulator for Vortex.
 
 /rtl constains Vortex processor hardware description.
+
+Basic Instructions to run OpenCL Benchmarks on Vortex
+-----------------------------------------------------
+
+Install development tools 
+
+    $ sudo apt-get install build-essential
+    $ sudo apt-get install git
+
+Install gnu-riscv-tools
+
+    $ sudo apt-get -y install \
+        binutils build-essential libtool texinfo \
+        gzip zip unzip patchutils curl git \
+        make cmake ninja-build automake bison flex gperf \
+        grep sed gawk python bc \
+        zlib1g-dev libexpat1-dev libmpc-dev \
+        libglib2.0-dev libfdt-dev libpixman-1-dev 
+    $ git clone https://github.com/riscv/riscv-gnu-toolchain
+    $ cd riscv-gnu-toolchain
+    $ git submodule update --init --recursive
+    $ mkdir build
+    $ cd build
+    $ export RISC_GNU_TOOLS_PATH=$PWD/../drops
+    $ ../configure --prefix=$RISC_GNU_TOOLS_PATH --with-arch=rv32im --with-abi=ilp32
+    $ make -j`nproc`  
+    $ make -j`nproc` build-qemu
+
+Install Vortex 
+
+    $ sudo apt-get install verilator
+    $ git clone https://github.gatech.edu/casl/Vortex.git
+
+# Build SimX
+
+    $ cd Vortex/simx
+    $ make
+
+# Run SGEMM OpenCL Benchmark
+
+    $ cd Vortex/benchmarks/opencl/sgemm
+    $ make
+    $ make run