The RISC-V Instruction Set Manual. Volume 1: User-Level ISA, Version 2.0
Abstract : RISC-V (pronounced risk-five) is a new instruction set architecture (ISA) that was originally designed to support computer architecture research and education, but which we now hope will become a standard open architecture for industry implementations. The RISC-V manual is structured in two volumes. This volume covers the user-level ISA design, including optional ISA extensions. The second volume provides examples of supervisor-level ISA design.