Imports of package riscv64

PathSynopsis
cmd/internal/obj/riscvCode generated by ./parse.py -go rv64_a rv64_d rv64_f rv64_i rv64_m rv64_q rv64_zba rv64_zbb rv64_zbs rv_a rv_d rv_f rv_i rv_m rv_q rv_s rv_system rv_v rv_zba rv_zbb rv_zbs rv_zicsr; DO NOT EDIT.
cmd/internal/objabi
cmd/internal/sys
cmd/link/internal/ld
cmd/link/internal/sym
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
logPackage log implements a simple logging package.