def test_exp2(self):
from numpypy import array, exp2
inf = float('inf')
ninf = -float('inf')
nan = float('nan')
cmpl = complex
for c, rel_err in (('complex64', 2e-7), ('complex128', 2e-15), ('clongdouble', 2e-15)):
a = [cmpl(-5., 0), cmpl(-5., -5.), cmpl(-5., 5.),
cmpl(0., -5.), cmpl(0., 0.), cmpl(0., 5.),
cmpl(-0., -5.), cmpl(-0., 0.), cmpl(-0., 5.),
cmpl(-0., -0.), cmpl(inf, 0.), cmpl(inf, 5.),
cmpl(inf, -0.), cmpl(ninf, 0.), cmpl(ninf, 5.),
cmpl(ninf, -0.), cmpl(ninf, inf), cmpl(inf, inf),
cmpl(ninf, ninf), cmpl(5., inf), cmpl(5., ninf),
cmpl(nan, 5.), cmpl(5., nan), cmpl(nan, nan),
]
b = exp2(array(a,dtype=c))
for i in range(len(a)):
try:
res = self.c_pow((2,0), (a[i].real, a[i].imag))
except OverflowError:
res = (inf, nan)
except ValueError:
res = (nan, nan)
msg = 'result of 2**%r(%r) got %r expected %r\n ' % \
(c,a[i], b[i], res)
# cast untranslated boxed results to float,
# does no harm when translated
t1 = float(res[0])
t2 = float(b[i].real)
self.rAlmostEqual(t1, t2, rel_err=rel_err, msg=msg)
t1 = float(res[1])
t2 = float(b[i].imag)
self.rAlmostEqual(t1, t2, rel_err=rel_err, msg=msg)
def test_exp2(self):
import math
from numpypy import array, exp2
inf = float('inf')
ninf = -float('inf')
nan = float('nan')
a = array([-5.0, -0.0, 0.0, 2, 12345678.0, inf, ninf, -12343424.0])
b = exp2(a)
for i in range(len(a)):
try:
res = 2 ** a[i]
except OverflowError:
res = float('inf')
assert b[i] == res
assert exp2(3) == 8
assert math.isnan(exp2(nan))
