from insn_general import *

class rvfi_insn_U_type(rvfi_insn_general):
    def __init__(self, RISCV_FORMAL_ILEN=32, RISCV_FORMAL_XLEN=32):
        super(rvfi_insn_U_type, self).__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN)
        self.insn_padding = Signal(self.RISCV_FORMAL_ILEN)
        self.insn_imm = Signal(self.RISCV_FORMAL_XLEN)
        self.insn_rd = Signal(5)
        self.insn_opcode = Signal(7)
        self.misa_ok = Signal(1)
    def ports(self):
        return super(rvfi_insn_U_type, self).ports()
    def elaborate(self, platform):
        m = super(rvfi_insn_U_type, self).elaborate(platform)

        # U-type instruction format
        m.d.comb += self.insn_padding.eq(self.rvfi_insn >> 32)
        m.d.comb += self.insn_imm.eq(Value.as_signed(self.rvfi_insn[12:32] << 12))
        m.d.comb += self.insn_rd.eq(self.rvfi_insn[7:12])
        m.d.comb += self.insn_opcode.eq(self.rvfi_insn[:7])

        m.d.comb += self.misa_ok.eq(1)

        return m