from migen.fhdl.structure import * from migen.fhdl.structure import _Operator from migen.flow.actor import * from migen.corelogic.record import * from migen.corelogic import divider class _SimpleBinary(Actor): def __init__(self, op, bv_op, bv_r): self.op = op Actor.__init__(self, SchedulingModel(SchedulingModel.COMBINATORIAL), ("operands", Sink, [('a', bv_op), ('b', bv_op)]), ("result", Source, [('r', bv_r)])) def get_process_fragment(self): return Fragment([ self.token("result").r.eq(_Operator(self.op, [self.token("operands").a, self.token("operands").b])) ]) class Add(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '+', bv, BV(bv.width+1, bv.signed)) class Sub(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '-', bv, BV(bv.width+1, bv.signed)) class Mul(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '*', bv, BV(2*bv.width, bv.signed)) class And(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '&', bv, bv) class Xor(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '^', bv, bv) class Or(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '|', bv, bv) class LT(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '<', bv, BV(1)) class LE(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '<=', bv, BV(1)) class EQ(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '==', bv, BV(1)) class NE(_SimpleBinary): def __init__(self, bv): _SimpleBinary.__init__(self, '!=', bv, BV(1)) class DivMod(Actor): def __init__(self, width): self.div = divider.Divider(width) Actor.__init__(self, SchedulingModel(SchedulingModel.SEQUENTIAL, width), ("operands", Sink, [("dividend", self.div.dividend_i), ("divisor", self.div.divisor_i)]), ("result", Source, [("quotient", self.div.quotient_o), ("remainder", self.div.remainder_o)])) def get_process_fragment(self): return self.div.get_fragment() + Fragment([self.div.start_i.eq(self.trigger)])