def _fac(a, number, label, stz, sta):
bytes = vm.py2fac(number)
for i, byte in enumerate(bytes):
if byte == 0:
a(stz, add(label, i))
else:
a(lda_imm, x8(byte))
a(sta, add(label, i))
def __call__(self):
cmd = self.mem[memmap.FPU_COMMAND]
if cmd == 0:
return
op1 = vm.fac2py(self.mem[_f0_start:_f0_end])
op2 = vm.fac2py(self.mem[_f1_start:_f1_end])
result = 0
status = aliases.FPU_OK
if cmd in FPU_BINARY_MAP:
try:
result = FPU_BINARY_MAP[cmd](op1, op2)
except ZeroDivisionError:
status = aliases.ERR_FPU_DIVISION_BY_ZERO
elif cmd in FPU_COMPARE_MAP:
cmpresult = FPU_COMPARE_MAP[cmd](op1, op2)
result = 1 if cmpresult else 0
else:
status = aliases.ERR_FPU_INVALID_COMMAND
self.mem[_f0_start:_f0_end] = vm.py2fac(result)
self.mem[memmap.FPU_COMMAND] = 0
self.mem[memmap.FPU_STATUS] = status
def test_py2fac_sign_both(self):
self.assertListEqual([0xff, 0x70, 0x56, 0x34, 0x12, 0x42],
vm.py2fac(-1.234567e-42))
def test_py2fac_sign_mantissa_with_exponent(self):
self.assertListEqual([0xf0, 0x70, 0x56, 0x34, 0x12, 0x42],
vm.py2fac(-1.234567e42))
def test_py2fac_sign_mantissa(self):
self.assertListEqual([0xf0, 0x70, 0x56, 0x34, 0x12, 0x06],
vm.py2fac(-1234567))
def test_py2fac_exponent2(self):
self.assertListEqual([0x00, 0x00, 0x00, 0x30, 0x12, 0x02],
vm.py2fac(123))
def test_py2fac_exponent6(self):
self.assertListEqual([0x00, 0x70, 0x56, 0x34, 0x12, 0x06],
vm.py2fac(1234567))
def test_py2fac(self):
self.assertListEqual([0x00, 0x70, 0x56, 0x34, 0x12, 0x00],
vm.py2fac(1.234567))
