pyMathBitPrecise 0.1

number types of variable bit size and utils for bit manipulations

pyMathBitPrecise

This library contains number types of variable bit size and utils for bit manipulations. Thre are also types which support tri state values etc. (Python equivalents of VHDL std_logic_vector, Verilog wire/reg.)

This may be usefull for tools which are simulating hardware or software which needs numbers of exact size.

Example

from pyMathBitPrecise.bits3t import Bits3t

#3t means that bits can have values 1,0,x
uint512_t = Bits3t(512, signed=False)

a = uint512_t.from_py(1)

# indexing on bits
assert a[0] == 1
assert a[0]._dtype.bit_length() == 1
assert a[1] == 0
assert a[8:] == 1
assert a[8:]._dtype.bit_length() == 8

# arithmetic
b = a + 1
assert b == 2
assert b._dtype == uint512_t

# bitwise operations
c = a >> 8
assert c == 0
assert c._dtype == uint512_t

# casting
d = int(a)
assert d == 1 and isinstance(d, int)

uint8_t = Bits3t(8, signed=False)
e = a.cast(uint8_t)
assert e._dtype == uint8_t