From 585965ee0adb6baea8604f53f614641db24221bb Mon Sep 17 00:00:00 2001 From: Donald Sebastian Leung Date: Wed, 26 Aug 2020 15:57:32 +0800 Subject: [PATCH] Add MUL instruction --- rvfi/insns/insn_mul.py | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 rvfi/insns/insn_mul.py diff --git a/rvfi/insns/insn_mul.py b/rvfi/insns/insn_mul.py new file mode 100644 index 0000000..ab9a8fa --- /dev/null +++ b/rvfi/insns/insn_mul.py @@ -0,0 +1,18 @@ +from .insn_rv32m_r_type import * + +""" +MUL instruction +""" + +class InsnMul(InsnRV32MRType): + def __init__(self, params): + super().__init__(params, 0b000) + 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) ^ 0x2cdf52a55876063e, 0)) + else: + m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, self.rvfi_rs1_rdata * self.rvfi_rs2_rdata, 0)) + + return m