tinyriscv/tests/isa/README.md

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RV32I instruction source code which copy from riscv(github).
I have modified it so can run on tinyriscv.
compile: type make under the cmd windows
recompile: type make after make clean under the cmd windows
编译方法:
1.修改Makefile里GNU工具链的路径
```
RISCV_PREFIX ?= /opt/riscv32/bin/riscv32-unknown-elf-
```
2.修改Makefile里bin文件转men文件工具的路径
```
BIN_TO_MEM := $(src_dir)/../../tools/BinToMem.py
```
3.编译
```
make
```
4.重新编译
```
make clean
make
```