riscv-formal-nmigen/rvfi/insns/insn_mul.py

19 lines
556 B
Python
Raw Normal View History

2020-08-26 15:57:32 +08:00
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