19 lines
525 B
Python
19 lines
525 B
Python
from .insn_rv64i_i_type_shift import *
|
|
|
|
"""
|
|
SLLIW instruction
|
|
"""
|
|
|
|
class InsnSlliw(InsnRV64IITypeShift):
|
|
def __init__(self, params):
|
|
super().__init__(params, 0b000000, 0b001)
|
|
|
|
def elaborate(self, platform):
|
|
m = super().elaborate(platform)
|
|
|
|
result = Signal(32)
|
|
m.d.comb += result.eq(self.rvfi_rs1_rdata[:32] << self.insn_shamt)
|
|
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
|