riscv-opcodes
riscv-opcodes copied to clipboard
riscv
What is the meaning of this opcode?
mod rd rs1 rs2 31..25=1 14..12=0 6..2=0x1A 1..0=3
I am trying to understand what exactly this sentence means. I found this line here, https://nitish2112.github.io/post/adding-instruction-riscv/
what is the purpose of this line? What is "14..12=0" , "6..2=0x1A" and "1..0=3" ? What do they do?
why is that they have values 0,0x1A and 3? And how does that line depict mod operation? @2henwei
@nikita890-art This line just describes the encoding of mod instruction, not the functionality.
oh, then suppose I want to develop an instruction that combines these 3 operations: srli a5,s7,22 sili a5,a5,2 add s0,s0,a5 where do i describe the functionality? and also, can I put any random values instead of 0,0x1A and 3?
@2henwei