def test_signed_int(self):
"""lib.functions.binary extends sign correctly"""
a = bin(-4, 8)[2:]
b = bin(4, 8)[2:]
self.assertEquals('11111100', a)
self.assertEquals('00000100', b)
c = int(a, 2, signed=True)
d = int(b, 2, signed=True)
self.assertEquals(-4, c)
self.assertEquals(4, d)
def test_break_point(self):
"""Adds a break point and checks for SigTrap."""
i=self.assembler.read_lines(['addi $s1, $zero, 255\n',
'addi $s2, $zero, 1023\n',
'slt $s0, $s1, $s2'])
i=self.assembler.convert(i)
self.memory.load_text(i)
self.cpu.add_break_point(int('0x40000c', 16))
cycles = 100
with self.assertRaises(SigTrap):
for i in range(cycles):
self.cpu.cycle()
# Shouldn't get anywhere near 100 cycles.
self.assertEquals(True, (i < 50))
# We should have fetched the slt instruction.
self.assertEquals("00000010001100101000000000101010",
bin(self.cpu.get_pipeline()[0], 32)[2:])