# Run CMSIS5 on Gem5

## Prerequisites

### 1. compile and install riscv64 compiler
branch : rvv-next

git clone https://github.com/riscv-collab/riscv-gnu-toolchain
git checkout rvv-next

### 2. build gem5

Reference: https://www.gem5.org/documentation/general_docs/building

python3 $(which scons) build/RISCV/gem5.opt

## Build Code

Repository: https://github.com/nycu-caslab/riscv-vectorized-benchmark-suite

1. checkout to `feature/pooling` branch
2. the folders containing CMSIS5 implementation are:
- _pooling
- _conv_gemm
- _fullconnect
- _activation
### 3. build code with riscv compiler

Using GNU GCC:

/opt/riscv/bin/riscv64-unknown-linux-gnu-gcc -march=rv64gcv -DUSE_RISCV_VECTOR -DRVV -I../include -o pooling.o pooling.c

Using Clang:

export GCC_TOOLCHAIN_DIR=/tools/gcc-riscv-linux-rvv
clang --target=riscv64-unknown-elf \ 
      -march=rv64gcv1p0 \ 
      --gcc-toolchain=${GCC_TOOLCHAIN_DIR} \ 
      -DUSE_RISCV_VECTOR -static -g -w \
      -I ../include \
      -o ./${TARGET}.o ./${TARGET}.c

## Run the Bin File on qemu
Run the bin file on qemu for function validation.

qemu-riscv64 -cpu rv64,v=true,vlen=128,elen=64,vext_spec=v1.0 ./pooling.o

--target=riscv64-unknown-linux-gnu -march=rv64gcv0p10 -menable-experimental-extensions --gcc-toolchain=${GCC_TOOLCHAIN_DIR} --sysroot=${GCC_TOOLCHAIN_DIR}sysroot -flax-vector-conversions -DUSE_RISCV_VECTOR -static -g -c -w -o