riscv-formal-nmigen/insns/insn_jal.py

21 lines
965 B
Python

from insn_UJ_type import *
class rvfi_insn_jal(rvfi_insn_UJ_type):
def __init__(self, RISCV_FORMAL_ILEN=32, RISCV_FORMAL_XLEN=32):
super(rvfi_insn_jal, self).__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN)
def ports(self):
return super(rvfi_insn_jal, self).ports()
def elaborate(self, platform):
m = super(rvfi_insn_jal, self).elaborate(platform)
# JAL instruction
next_pc = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += next_pc.eq(self.rvfi_pc_rdata + self.insn_imm)
m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_opcode == 0b1101111))
m.d.comb += self.spec_rd_addr.eq(self.insn_rd)
m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, self.rvfi_pc_rdata + 4, 0))
m.d.comb += self.spec_pc_wdata.eq(next_pc)
m.d.comb += self.spec_trap.eq(Mux(self.ialign16, next_pc[0] != 0, next_pc[:2] != 0) | ~self.misa_ok)
return m