Notes

最近开始学C++，做一下记录。大学其实学过一点，但是因为专业是物联网工程所以C++课比软件工程课时少，没学完，而且没咋用忘光了。

timeline 1980: start around, RISC-V is the fifth generation of a research project. 2010: RISC-V is the result of an evolving project. 2011: The first version of the RISC-V ISA was released. name the number just after “RV”: XLEN: in the Unprivileged Specification document. represents the width of registers and not the width of the instructions. Not all instruction width are allowed, only multiple of 16 bits wide. for example, the 32 of RV32I. RV64G: RV64IMAFDZicsr_Zifencei ...