assembler

Assembler RISC-V

Syntax :

• R : instr rd rs1 rs2
• R : instr rd rs1 rs2 imm
• R : instr rd rs1 rs2 lab
• I : instr rd rs imm
• I : instr rd rs lab
• U : instr rd imm
• U : instr rd lab

  Comments starting by # Labels are strings of chars and digits followed by a : R types with labels are the conditionnal branching, just need to append the label (or immediate) to the instruction.

So the syntax is first the register output, then the two registers or register immediate or immediate/label.

Compilation:

Run make compiler to create an executable named asm. It runs then on files with name of the format file.x (because its cool 😎). A tests directory is provided but we need more automatization. For the moment, the assembler takes care of immediates on 16 bits in two's complement. It's not optimal we might want to extend the range of immediates with different types of instructions. The instructions are coded in little endian and the format is the one from our report so on the string in reading order we have opcode then output register, immediate and input registers.