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from py.test import raises
from rpython.jit.backend.ppc.form import Form, FormException
from rpython.jit.backend.ppc.field import Field
from rpython.jit.backend.ppc.opassembler import OpAssembler as Assembler
# 0 31
# +-------------------------------+
# | h | l |
# +-------------------------------+
# | hh | hl | lh | ll |
# +-------------------------------+
test_fieldmap = {
'l' : Field('l', 16, 31),
'h' : Field('h', 0, 15),
'll': Field('ll', 24, 31),
'lh': Field('lh', 16, 23),
'hl': Field('hl', 8, 15),
'hh': Field('hh', 0, 7),
}
def p(a):
import struct
w = a.insts[-1].assemble()
return struct.pack('>i', w)
class TForm(Form):
fieldmap = test_fieldmap
class TestForms(object):
def test_bitclash(self):
raises(FormException, TForm, 'h', 'hh')
raises(FormException, TForm,
Field('t1', 0, 0), Field('t2', 0, 0))
def test_basic(self):
class T(Assembler):
i = TForm('h', 'l')()
j = i(h=1)
k = i(l=3)
raises(FormException, k, l=0)
insts = []
a = T()
a.i(5, 6)
assert p(a) == '\000\005\000\006'
a = T()
a.j(2)
assert p(a) == '\000\001\000\002'
a = T()
a.k(4)
assert p(a) == '\000\004\000\003'
def test_defdesc(self):
class T(Assembler):
i = TForm('hh', 'hl', 'lh', 'll')()
i.default(hl=0).default(hh=1)
insts = []
a = T()
a.i(1, 2, 3, 4)
assert p(a) == '\001\002\003\004'
a = T()
a.i(1, 3, 4)
assert p(a) == '\001\000\003\004'
a = T()
a.i(3, 4)
assert p(a) == '\001\000\003\004'
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