An outstanding RISC-V RV64IMAFDC(RV64GC) simulator.
First of all, riscv gnu toolchain must be installed. Source repo is at https://github.com/riscv/riscv-gnu-toolchain, complete the build with the following commands:
$ apt 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$ git clone --recursive https://github.com/riscv/riscv-gnu-toolchain
$ cd riscv-gnu-toolchain
$ git submodule update --init --recursive
$ ./configure --prefix=/opt/riscv --with-arch=rv64gc
$ make$ git clone https://github.com/mohanson/rv64
$ cd rv64
$ go run cmd/make/main.goThe binary file rv64 will be located at the ./bin directory. Could test it with the following command:
$ export RISCV=/opt/riscv
$ ./bin/make test
[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64ua-u-amoadd_d
[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64ua-u-amoadd_w
# Many lines ...
[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64um-u-remuw
[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64um-u-remwLet's compile a simple C file, which implements the fibonacci function.
int fib(int n) {
if (n <= 1) {
return n;
}
return fib(n - 1) + fib(n - 2);
}
int main() {
return fib(10);
}$ /opt/riscv/bin/riscv64-unknown-elf-gcc -o /tmp/fib ./res/program/fib.c
$ ./bin/rv64 -- /tmp/fib
$ echo $?
# 55WTFPL.
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