def execute_lbu(s, inst):
addr = trim(s.rf[inst.rs()] + sext(inst.imm()))
s.rf[inst.rt()] = s.mem.read(addr, 1)
s.pc += 4
def execute_sb(s, inst):
addr = trim(s.rf[inst.rs()] + sext(inst.imm()))
s.mem.write(addr, 1, s.rf[inst.rt()])
s.pc += 4
def execute_bne(s, inst):
if s.rf[inst.rs()] != s.rf[inst.rt()]:
s.pc = s.pc + 4 + (signed(sext(inst.imm())) << 2)
else:
s.pc += 4
def execute_bgez(s, inst):
if signed(s.rf[inst.rs()]) >= 0:
s.pc = s.pc + 4 + (signed(sext(inst.imm())) << 2)
else:
s.pc += 4
def execute_slti(s, inst):
s.rf[inst.rt()] = signed(s.rf[inst.rs()]) < signed(sext(inst.imm()))
s.pc += 4
def execute_sltiu(s, inst):
s.rf[inst.rt()] = s.rf[inst.rs()] < sext(inst.imm())
s.pc += 4
def execute_addiu(s, inst):
s.rf[inst.rt()] = trim(s.rf[inst.rs()] + sext(inst.imm()))
s.pc += 4
def execute_lh( s, inst ): addr = trim_64( s.rf[inst.rs1] + inst.i_imm ) s.rf[inst.rd] = sext( s.mem.read( addr, 2 ), 16 ) s.pc += 4
def xs(self, lo, len):
return sext(self.bits >> lo, len)
def xs(self, lo, len):
return sext(self.bits >> lo, len)
def execute_lh(s, inst):
addr = trim_64(s.rf[inst.rs1] + inst.i_imm)
s.rf[inst.rd] = sext(s.mem.read(addr, 2), 16)
s.pc += 4
