internal.Instructions.scala Maven / Gradle / Ivy
package com.carlosedp.riscvassembler
object InstType extends Enumeration {
type Type = Value
val I, R, B, S, U, J = Value
}
case class Instruction(
name: String,
realName: String = "",
instType: InstType.Type,
funct3: String = "",
funct7: String = "",
opcode: String,
hasOffset: Boolean = false,
isCsr: Boolean = false,
hasImm: Boolean = false,
fixed: String = "",
)
protected object Instructions {
def apply(instruction: String): Option[Instruction] =
instructions.find(_.name == instruction.toUpperCase)
// scalafmt: { maxColumn = 130}
private val instructions = List(
Instruction(name = "LUI", instType = InstType.U, opcode = "0110111"),
Instruction(name = "AUIPC", instType = InstType.U, opcode = "0010111", funct3 = "001"),
Instruction(name = "JAL", instType = InstType.J, opcode = "1101111"),
Instruction(name = "JALR", instType = InstType.I, opcode = "1100111", funct3 = "000"),
Instruction(name = "BEQ", instType = InstType.B, opcode = "1100011", funct3 = "000"),
Instruction(name = "BNE", instType = InstType.B, opcode = "1100011", funct3 = "001"),
Instruction(name = "BLT", instType = InstType.B, opcode = "1100011", funct3 = "100"),
Instruction(name = "BGE", instType = InstType.B, opcode = "1100011", funct3 = "101"),
Instruction(name = "BLTU", instType = InstType.B, opcode = "1100011", funct3 = "110"),
Instruction(name = "BGEU", instType = InstType.B, opcode = "1100011", funct3 = "111"),
Instruction(name = "LB", instType = InstType.I, opcode = "0000011", funct3 = "000", hasOffset = true),
Instruction(name = "LH", instType = InstType.I, opcode = "0000011", funct3 = "001", hasOffset = true),
Instruction(name = "LW", instType = InstType.I, opcode = "0000011", funct3 = "010", hasOffset = true),
Instruction(name = "LBU", instType = InstType.I, opcode = "0000011", funct3 = "100", hasOffset = true),
Instruction(name = "LHU", instType = InstType.I, opcode = "0000011", funct3 = "101", hasOffset = true),
Instruction(name = "SB", instType = InstType.S, opcode = "0100011", funct3 = "000"),
Instruction(name = "SH", instType = InstType.S, opcode = "0100011", funct3 = "001"),
Instruction(name = "SW", instType = InstType.S, opcode = "0100011", funct3 = "010"),
Instruction(name = "ADDI", instType = InstType.I, opcode = "0010011", funct3 = "000"),
Instruction(name = "SLTI", instType = InstType.I, opcode = "0010011", funct3 = "010"),
Instruction(name = "SLTIU", instType = InstType.I, opcode = "0010011", funct3 = "011"),
Instruction(name = "XORI", instType = InstType.I, opcode = "0010011", funct3 = "100"),
Instruction(name = "ORI", instType = InstType.I, opcode = "0010011", funct3 = "110"),
Instruction(name = "ANDI", instType = InstType.I, opcode = "0010011", funct3 = "111"),
Instruction(name = "SLLI", instType = InstType.I, opcode = "0010011", funct3 = "001", fixed = "0000000"),
Instruction(name = "SRLI", instType = InstType.I, opcode = "0010011", funct3 = "101", fixed = "0000000"),
Instruction(name = "SRAI", instType = InstType.I, opcode = "0010011", funct3 = "101", fixed = "0100000"),
Instruction(name = "ADD", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "000"),
Instruction(name = "SUB", instType = InstType.R, opcode = "0110011", funct7 = "0100000", funct3 = "000"),
Instruction(name = "SLL", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "001"),
Instruction(name = "SLT", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "010"),
Instruction(name = "SLTU", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "011"),
Instruction(name = "XOR", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "100"),
Instruction(name = "SRL", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "101"),
Instruction(name = "SRA", instType = InstType.R, opcode = "0110011", funct7 = "0100000", funct3 = "101"),
Instruction(name = "OR", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "110"),
Instruction(name = "AND", instType = InstType.R, opcode = "0110011", funct7 = "0000000", funct3 = "111"),
Instruction(name = "FENCE", instType = InstType.I, opcode = "0001111", funct3 = "000"),
Instruction(name = "FENCE.I", instType = InstType.I, opcode = "0001111", funct3 = "001", fixed = "000000000000"),
Instruction(name = "ECALL", instType = InstType.I, opcode = "1110011", funct3 = "000", fixed = "000000000000"),
Instruction(name = "EBREAK", instType = InstType.I, opcode = "1110011", funct3 = "000", fixed = "000000000001"),
// Instructions below are still not implemented
Instruction(name = "CSRRW", instType = InstType.I, opcode = "1110011", funct3 = "001", isCsr = true, hasImm = false),
Instruction(name = "CSRRS", instType = InstType.I, opcode = "1110011", funct3 = "010", isCsr = true, hasImm = false),
Instruction(name = "CSRRC", instType = InstType.I, opcode = "1110011", funct3 = "011", isCsr = true, hasImm = false),
Instruction(name = "CSRRWI", instType = InstType.I, opcode = "1110011", funct3 = "101", isCsr = true, hasImm = true),
Instruction(name = "CSRRSI", instType = InstType.I, opcode = "1110011", funct3 = "110", isCsr = true, hasImm = true),
Instruction(name = "CSRRCI", instType = InstType.I, opcode = "1110011", funct3 = "111", isCsr = true, hasImm = true),
)
}
/**
* This function transforms a pseudo instruction to it's real conterpart
*/
protected object PseudoInstructions {
def apply(instructionData: Array[String]): Option[Array[String]] =
instructionData(0).toUpperCase match {
// Map received params to the corresponding RISC-V instruction
case "NOP" => { Some(Array("addi", "x0", "x0", "0")) }
case "MV" => { Some(Array("addi", instructionData(1), instructionData(2), "0")) }
case "NOT" => { Some(Array("xori", instructionData(1), instructionData(2), "-1")) }
case "NEG" => { Some(Array("sub", instructionData(1), "x0", instructionData(2))) }
case "SEQZ" => { Some(Array("sltiu", instructionData(1), instructionData(2), "1")) }
case "SNEZ" => { Some(Array("sltu", instructionData(1), "x0", instructionData(2))) }
case "SLTZ" => { Some(Array("slt", instructionData(1), instructionData(2), "x0")) }
case "SGTZ" => { Some(Array("slt", instructionData(1), "x0", instructionData(2))) }
case "BEQZ" => { Some(Array("beq", instructionData(1), "x0", instructionData(2))) }
case "BNEZ" => { Some(Array("bne", instructionData(1), "x0", instructionData(2))) }
case "BLEZ" => { Some(Array("bge", "x0", instructionData(1), instructionData(2))) }
case "BGEZ" => { Some(Array("bge", instructionData(1), "x0", instructionData(2))) }
case "BLTZ" => { Some(Array("blt", instructionData(1), "x0", instructionData(2))) }
case "BGTZ" => { Some(Array("blt", "x0", instructionData(1), instructionData(2))) }
case "BGT" => { Some(Array("blt", instructionData(2), instructionData(1), instructionData(3))) }
case "BLE" => { Some(Array("bge", instructionData(2), instructionData(1), instructionData(3))) }
case "BGTU" => { Some(Array("bltu", instructionData(2), instructionData(1), instructionData(3))) }
case "BLEU" => { Some(Array("bgeu", instructionData(2), instructionData(1), instructionData(3))) }
case "J" => { Some(Array("jal", "x0", instructionData(1))) }
case "JR" => { Some(Array("jalr", "x0", instructionData(1), "0")) }
case "RET" => { Some(Array("jalr", "x0", "x1", "0")) }
case _ => None
}
}
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