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test_intbv.py
564 lines (465 loc) · 16.3 KB
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test_intbv.py
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# This file is part of the myhdl library, a Python package for using
# Python as a Hardware Description Language.
#
# Copyright (C) 2003-2008 Jan Decaluwe
#
# The myhdl library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
""" Run the intbv unit tests. """
import operator
import random
import sys
from copy import copy, deepcopy
from random import randrange
import pytest
from myhdl import intbv
random.seed(2) # random, but deterministic
maxint = sys.maxsize
class TestIntbvInit:
def testDefaultValue(self):
assert intbv() == 0
def getItem(s, i):
ext = '0' * (i - len(s) + 1)
exts = ext + s
si = len(exts) - 1 - i
return exts[si]
def getSlice(s, i, j):
ext = '0' * (i - len(s) + 1)
exts = ext + s
si = len(exts) - i
sj = len(exts) - j
return exts[si:sj]
def getSliceLeftOpen(s, j):
ext = '0' * (j - len(s) + 1)
exts = ext + s
if j:
return exts[:-j]
else:
return exts
def setItem(s, i, val):
ext = '0' * (i - len(s) + 1)
exts = ext + s
si = len(exts) - 1 - i
return exts[:si] + val + exts[si + 1:]
def setSlice(s, i, j, val):
ext = '0' * (i - len(s) + 1)
exts = ext + s
si = len(exts) - i
sj = len(exts) - j
return exts[:si] + val[si - sj:] + exts[sj:]
def setSliceLeftOpen(s, j, val):
ext = '0' * (j - len(s) + 1)
exts = ext + s
if j:
return val + exts[-j:]
else:
return val
class TestIntBvIndexing:
def seqsSetup(self):
seqs = ["0", "1", "000", "111", "010001", "110010010", "011010001110010"]
seqs.extend(["0101010101", "1010101010", "00000000000", "11111111111111"])
seqs.append("11100101001001101000101011011101001101")
seqs.append("00101011101001011111010100010100100101010001001")
self.seqs = seqs
seqv = ["0", "1", "10", "101", "1111", "1010"]
seqv.extend(["11001", "00111010", "100111100"])
seqv.append("0110101001111010101110011010011")
seqv.append("1101101010101101010101011001101101001100110011")
self.seqv = seqv
def testGetItem(self):
self.seqsSetup()
for s in self.seqs:
n = int(s, 2)
bv = intbv(n)
bvi = intbv(~n)
for i in range(len(s) + 20):
ref = int(getItem(s, i), 2)
res = bv[i]
resi = bvi[i]
assert res == ref
assert type(res) == bool
assert resi == ref ^ 1
assert type(resi) == bool
def testGetSlice(self):
self.seqsSetup()
for s in self.seqs:
n = int(s, 2)
bv = intbv(n)
bvi = intbv(~n)
for i in range(1, len(s) + 20):
for j in range(0, len(s) + 20):
try:
res = bv[i:j]
resi = bvi[i:j]
except ValueError:
assert i <= j
continue
ref = int(getSlice(s, i, j), 2)
assert res == ref
assert type(res) == intbv
mask = (2 ** (i - j)) - 1
assert resi == ref ^ mask
assert type(resi) == intbv
def testGetSliceLeftOpen(self):
self.seqsSetup()
for s in self.seqs:
n = int(s, 2)
bv = intbv(n)
bvi = intbv(~n)
for j in range(0, len(s) + 20):
res = bv[:j]
resi = bvi[:j]
ref = int(getSliceLeftOpen(s, j), 2)
assert res == ref
assert type(res) == intbv
assert resi + ref == -1
assert type(res) == intbv
def testSetItem(self):
self.seqsSetup()
for s in self.seqs:
n = int(s, 2)
for it in (int, intbv):
for i in range(len(s) + 20):
# print i
bv0 = intbv(n)
bv1 = intbv(n)
bv0i = intbv(~n)
bv1i = intbv(~n)
bv0[i] = it(0)
bv1[i] = it(1)
bv0i[i] = it(0)
bv1i[i] = it(1)
ref0 = int(setItem(s, i, '0'), 2)
ref1 = int(setItem(s, i, '1'), 2)
ref0i = ~int(setItem(s, i, '1'), 2)
ref1i = ~int(setItem(s, i, '0'), 2)
assert bv0 == ref0
assert bv1 == ref1
assert bv0i == ref0i
assert bv1i == ref1i
def testSetSlice(self):
self.seqsSetup()
toggle = 0
for s in self.seqs:
n = int(s, 2)
for i in range(1, len(s) + 5):
for j in range(0, len(s) + 5):
for v in self.seqv:
ext = '0' * (i - j - len(v))
extv = ext + v
bv = intbv(n)
bvi = intbv(~n)
val = int(v, 2)
toggle ^= 1
if toggle:
val = intbv(val)
try:
bv[i:j] = val
except ValueError:
assert i <= j or val >= 2 ** (i - j)
continue
else:
ref = int(setSlice(s, i, j, extv), 2)
assert bv == ref
mask = (2 ** (i - j)) - 1
vali = val ^ mask
try:
bvi[i:j] = vali
except ValueError:
assert vali >= 2 ** (i - j)
continue
else:
refi = ~int(setSlice(s, i, j, extv), 2)
assert bvi == refi
def testSetSliceLeftOpen(self):
self.seqsSetup()
toggle = 0
for s in self.seqs:
n = int(s, 2)
for j in range(0, len(s) + 5):
for v in self.seqv:
bv = intbv(n)
bvi = intbv(~n)
val = int(v, 2)
toggle ^= 1
if toggle:
val = intbv(val)
bv[:j] = val
bvi[:j] = -1 - val
ref = int(setSliceLeftOpen(s, j, v), 2)
assert bv == ref
refi = ~int(setSliceLeftOpen(s, j, v), 2)
assert bvi == refi
class TestIntBvAsInt:
def seqSetup(self, imin, imax, jmin=0, jmax=None):
seqi = [imin, imin, 12, 34]
seqj = [jmin, 12 , jmin, 34]
if not imax and not jmax:
l = 2222222222222222222222222222
seqi.append(l)
seqj.append(l)
# first some smaller ints
for __ in range(100):
ifirstmax = jfirstmax = 100000
if imax:
ifirstmax = min(imax, ifirstmax)
if jmax:
jfirstmax = min(jmax, jfirstmax)
i = randrange(imin, ifirstmax)
j = randrange(jmin, jfirstmax)
seqi.append(i)
seqj.append(j)
# then some potentially ints
for __ in range(100):
if not imax:
i = randrange(maxint) + randrange(maxint)
else:
i = randrange(imin, imax)
if not jmax:
j = randrange(maxint) + randrange(maxint)
else:
j = randrange(jmin, jmax)
seqi.append(i)
seqj.append(j)
self.seqi = seqi
self.seqj = seqj
def binaryCheck(self, op, imin=0, imax=None, jmin=0, jmax=None):
self.seqSetup(imin=imin, imax=imax, jmin=jmin, jmax=jmax)
for i, j in zip(self.seqi, self.seqj):
bi = intbv(int(i))
bj = intbv(j)
ref = op(int(i), j)
r1 = op(bi, j)
r2 = op(int(i), bj)
r3 = op(bi, bj)
# self.assertEqual(type(r1), intbv)
# self.assertEqual(type(r2), intbv)
# self.assertEqual(type(r3), intbv)
assert r1 == ref
assert r2 == ref
assert r3 == ref
def augmentedAssignCheck(self, op, imin=0, imax=None, jmin=0, jmax=None):
self.seqSetup(imin=imin, imax=imax, jmin=jmin, jmax=jmax)
for i, j in zip(self.seqi, self.seqj):
bj = intbv(j)
ref = int(i)
ref = op(ref, j)
r1 = bi1 = intbv(int(i))
r1 = op(r1, j)
r2 = int(i)
r2 = op(r2, bj)
r3 = bi3 = intbv(int(i))
r3 = op(r3, bj)
assert type(r1) == intbv
assert type(r3) == intbv
assert r1 == ref
assert r2 == ref
assert r3 == ref
assert r1 is bi1
assert r3 is bi3
def unaryCheck(self, op, imin=0, imax=None):
self.seqSetup(imin=imin, imax=imax)
for i in self.seqi:
bi = intbv(i)
ref = op(i)
r1 = op(bi)
# self.assertEqual(type(r1), intbv)
assert r1 == ref
def conversionCheck(self, op, imin=0, imax=None):
self.seqSetup(imin=imin, imax=imax)
for i in self.seqi:
bi = intbv(i)
ref = op(i)
r1 = op(bi)
assert type(r1) == type(ref)
assert r1 == ref
def comparisonCheck(self, op, imin=0, imax=None, jmin=0, jmax=None):
self.seqSetup(imin=imin, imax=imax, jmin=jmin, jmax=jmax)
for i, j in zip(self.seqi, self.seqj):
bi = intbv(i)
bj = intbv(j)
ref = op(i, j)
r1 = op(bi, j)
r2 = op(i, bj)
r3 = op(bi, bj)
assert r1 == ref
assert r2 == ref
assert r3 == ref
def testAdd(self):
self.binaryCheck(operator.add)
def testSub(self):
self.binaryCheck(operator.sub)
def testMul(self):
self.binaryCheck(operator.mul, imax=maxint) # XXX doesn't work for long i???
def testTrueDiv(self):
self.binaryCheck(operator.truediv, jmin=1)
def testFloorDiv(self):
self.binaryCheck(operator.floordiv, jmin=1)
def testMod(self):
self.binaryCheck(operator.mod, jmin=1)
def testPow(self):
self.binaryCheck(pow, jmax=64)
def testLShift(self):
self.binaryCheck(operator.lshift, jmax=256)
def testRShift(self):
self.binaryCheck(operator.rshift, jmax=256)
def testAnd(self):
self.binaryCheck(operator.and_)
def testOr(self):
self.binaryCheck(operator.or_)
def testXor(self):
self.binaryCheck(operator.xor)
def testIAdd(self):
self.augmentedAssignCheck(operator.iadd)
def testISub(self):
self.augmentedAssignCheck(operator.isub)
def testIMul(self):
self.augmentedAssignCheck(operator.imul, imax=maxint) # XXX doesn't work for long i???
def testIFloorDiv(self):
self.augmentedAssignCheck(operator.ifloordiv, jmin=1)
def testIMod(self):
self.augmentedAssignCheck(operator.imod, jmin=1)
def testIPow(self):
self.augmentedAssignCheck(operator.ipow, jmax=64)
def testIAnd(self):
self.augmentedAssignCheck(operator.iand)
def testIOr(self):
self.augmentedAssignCheck(operator.ior)
def testIXor(self):
self.augmentedAssignCheck(operator.ixor)
def testILShift(self):
self.augmentedAssignCheck(operator.ilshift, jmax=256)
def testIRShift(self):
self.augmentedAssignCheck(operator.irshift, jmax=256)
def testNeg(self):
self.unaryCheck(operator.neg)
def testPos(self):
self.unaryCheck(operator.pos)
def testAbs(self):
self.unaryCheck(operator.abs)
def testInvert(self):
self.unaryCheck(operator.inv)
def testInt(self):
self.conversionCheck(int, imax=maxint)
def testLong(self):
self.conversionCheck(int)
def testFloat(self):
self.conversionCheck(float)
# XXX __complex__ seems redundant ??? (complex() works as such?)
def testOct(self):
self.conversionCheck(oct)
def testHex(self):
self.conversionCheck(hex)
def testLt(self):
self.comparisonCheck(operator.lt)
def testLe(self):
self.comparisonCheck(operator.le)
def testGt(self):
self.comparisonCheck(operator.gt)
def testGe(self):
self.comparisonCheck(operator.ge)
def testEq(self):
self.comparisonCheck(operator.eq)
def testNe(self):
self.comparisonCheck(operator.ne)
class TestIntbvBounds:
def testConstructor(self):
assert intbv(40, max=54) == 40
with pytest.raises(ValueError):
intbv(40, max=27)
assert intbv(25, min=16) == 25
with pytest.raises(ValueError):
intbv(25, min=27)
def testSliceAssign(self):
a = intbv(min=-24, max=34)
for i in (-24, -2, 13, 33):
for k in (6, 9, 10):
a[:] = 0
a[k:] = i
assert a == i
for i in (-25, -128, 34, 35, 229):
for k in (0, 9, 10):
with pytest.raises(ValueError):
a[k:] = i
a = intbv(5)[8:]
for v in (0, 2 ** 8 - 1, 100):
a[:] = v
for v in (-1, 2 ** 8, -10, 1000):
with pytest.raises(ValueError):
a[:] = v
def checkBounds(self, i, j, op):
a = intbv(i)
assert a == i # just to be sure
try:
exec("a %s int(j)" % op)
except (ZeroDivisionError, ValueError):
return # prune
if not isinstance(a._val, int):
return # prune
if abs(a) > maxint * maxint:
return # keep it reasonable
if a > i:
b = intbv(i, min=i, max=a + 1)
for m in (i + 1, a):
b = intbv(i, min=i, max=m)
with pytest.raises(ValueError):
exec("b %s int(j)" % op)
elif a < i:
b = intbv(i, min=a, max=i + 1)
exec("b %s int(j)" % op) # should be ok
for m in (a + 1, i):
b = intbv(i, min=m, max=i + 1)
with pytest.raises(ValueError):
exec("b %s int(j)" % op)
else: # a == i
b = intbv(i, min=i, max=i + 1)
exec("b %s int(j)" % op) # should be ok
def checkOp(self, op):
for i in (0, 1, -1, 2, -2, 16, -24, 129, -234, 1025, -15660):
for j in (0, 1, -1, 2, -2, 9, -15, 123, -312, 2340, -23144):
self.checkBounds(i, j, op)
def testIAdd(self):
self.checkOp("+=")
def testISub(self):
self.checkOp("-=")
def testIMul(self):
self.checkOp("*=")
def testIFloorDiv(self):
self.checkOp("//=")
def testIMod(self):
self.checkOp("%=")
def testIPow(self):
self.checkOp("**=")
def testIAnd(self):
self.checkOp("&=")
def testIOr(self):
self.checkOp("|=")
def testIXor(self):
self.checkOp("^=")
def testILShift(self):
self.checkOp("<<=")
def testIRShift(self):
self.checkOp(">>=")
class TestIntbvCopy:
def testCopy(self):
for n in (intbv(), intbv(34), intbv(-12, min=-15), intbv(45, max=65),
intbv(23, min=2, max=47), intbv(35)[3:]):
a = intbv(n)
b = copy(n)
c = deepcopy(n)
for m in (a, b, c):
assert n == m
assert n._val == m._val
assert n.min == m.min
assert n.max == m.max
assert len(n) == len(m)