44711b7d08
Requres every elaboratable to inherit from Elaboratable, but still accepts ones that do not, with a warning. Fixes #3.
29 lines
806 B
Python
29 lines
806 B
Python
from nmigen import *
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from nmigen.cli import main
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class ALU(Elaboratable):
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def __init__(self, width):
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self.sel = Signal(2)
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self.a = Signal(width)
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self.b = Signal(width)
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self.o = Signal(width)
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self.co = Signal()
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def elaborate(self, platform):
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m = Module()
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with m.If(self.sel == 0b00):
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m.d.comb += self.o.eq(self.a | self.b)
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with m.Elif(self.sel == 0b01):
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m.d.comb += self.o.eq(self.a & self.b)
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with m.Elif(self.sel == 0b10):
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m.d.comb += self.o.eq(self.a ^ self.b)
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with m.Else():
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m.d.comb += Cat(self.o, self.co).eq(self.a - self.b)
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return m
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if __name__ == "__main__":
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alu = ALU(width=16)
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main(alu, ports=[alu.sel, alu.a, alu.b, alu.o, alu.co])
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