From 9b4644e9057a2ef67f8d82d979d318fc5538f2f3 Mon Sep 17 00:00:00 2001 From: Donald Sebastian Leung Date: Fri, 28 Aug 2020 12:04:51 +0800 Subject: [PATCH] Add REMUW instruction --- rvfi/insns/insn_remuw.py | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 rvfi/insns/insn_remuw.py diff --git a/rvfi/insns/insn_remuw.py b/rvfi/insns/insn_remuw.py new file mode 100644 index 0000000..9e7f9e8 --- /dev/null +++ b/rvfi/insns/insn_remuw.py @@ -0,0 +1,20 @@ +from .insn_rv64m_r_type import * + +""" +REMUW instruction +""" + +class InsnRemuw(InsnRV64MRType): + def __init__(self, params): + super.__init__(params, 0b111) + def elaborate(self, platform): + m = super().elaborate(platform) + + result = Signal(32) + if self.params.altops: + m.d.comb += result.eq((self.rvfi_rs1_rdata - self.rvfi_rs2_rdata) ^ 0xbc4402413138d0e1) + else: + m.d.comb += result.eq(Mux(self.rvfi_rs2_rdata == 0, self.rvfi_rs1_rdata, self.rvfi_rs1_rdata[:32] % self.rvfi_rs2_rdata[:32])) + m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, (Mux(result[31], 2 ** (self.params.xlen - 32) - 1, 0) << 32) | result, 0)) + + return m