21 lines
906 B
Python
21 lines
906 B
Python
|
from insn_I_shift import *
|
||
|
|
|
||
|
|
class rvfi_insn_srli(rvfi_insn_I_shift):
|
||
|
|
def __init__(self):
|
||
|
|
super(rvfi_insn_srli, self).__init__()
|
||
|
|
def ports(self):
|
||
|
|
return super(rvfi_insn_srli, self).ports()
|
||
|
|
def elaborate(self, platform):
|
||
|
|
m = super(rvfi_insn_srli, self).elaborate(platform)
|
||
|
|
|
||
|
|
# SRLI instruction
|
||
|
|
result = Signal(32)
|
||
|
|
m.d.comb += result.eq(self.rvfi_rs1_rdata >> self.insn_shamt)
|
||
|
|
m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct6 == 0b000000) & (self.insn_funct3 == 0b101) & (self.insn_opcode == 0b0010011) & (~self.insn_shamt[5]))
|
||
|
|
m.d.comb += self.spec_rs1_addr.eq(self.insn_rs1)
|
||
|
|
m.d.comb += self.spec_rd_addr.eq(self.insn_rd)
|
||
|
|
m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, result, 0))
|
||
|
|
m.d.comb += self.spec_pc_wdata.eq(self.rvfi_pc_rdata + 4)
|
||
|
|
|
||
|
|
return m
|