diff --git a/rvfi/insns/insn_divu.py b/rvfi/insns/insn_divu.py new file mode 100644 index 0000000..de09b5e --- /dev/null +++ b/rvfi/insns/insn_divu.py @@ -0,0 +1,18 @@ +from .insn_rv32m_r_type import * + +""" +DIVU instruction +""" + +class InsnDivu(InsnRV32MRType): + def __init__(self, params): + super().__init__(params, 0b101) + def elaborate(self, platform): + m = super().elaborate(platform) + + if self.params.altops: + m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, (self.rvfi_rs1_rdata - self.rvfi_rs2_rdata) ^ 0x8c629acb10e8fd70, 0)) + else: + m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, Mux(self.rvfi_rs2_rdata == 0, 2 ** self.params.xlen - 1, self.rvfi_rs1_rdata // self.rvfi_rs2_rdata), 0)) + + return m