riscv-formal-nmigen/insns/InsnSub.py

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2020-08-07 14:00:12 +08:00
from InsnRV32IRType import *
class InsnSub(InsnRV32IRType):
def __init__(self, RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED):
super(InsnSub, self).__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED, 0b0100000, 0b000, 0b0110011)
def elaborate(self, platform):
m = super(InsnSub, self).elaborate(platform)
m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, self.rvfi_rs1_rdata - self.rvfi_rs2_rdata, 0))
return m