def Decode(i, n, invert=False, **kwargs):
"""
Decode the n-bit number i.
@return: 1 if the n-bit input equals i
"""
if n <= 4:
i = 1 << i
if invert:
mask = (1 << (1 << n)) - 1
i = mask & (~i)
return m.uncurry(LUT(i, n, **kwargs))
return DefineDecode(i, n)()
def Decode(i, n, invert=False, **kwargs):
"""
Decode the n-bit number i.
@return: 1 if the n-bit input equals i
"""
assert n <= 8
if os.environ["MANTLE"] == "coreir":
from mantle import eq
from magma import Bits, In, Bit, DefineCircuit, EndDefine, wire, bits, Out
circ = DefineCircuit(f"Decode{i}{n}", "I", In(Bits(n)), "O", Out(Bit))
wire(circ.O, eq(circ.I, bits(i, n)))
EndDefine()
return circ()
i = 1 << i
if invert:
m = 1 << n
mask = (1 << m) - 1
i = mask & (~i)
return uncurry(LUT(i, n, **kwargs))
def ROM4(data, i, width):
return fork([uncurry(LUT(data[i][w], 4)) for w in range(width)])
def a(y):
return LUT([0, 1, 0, 0]) # A0 & ~A1