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# mode: run
# tag: cpp, werror, cpp20
from libcpp cimport bool
from libc.stdint cimport uint8_t, int8_t
from libcpp.bit cimport (bit_cast, has_single_bit, bit_ceil, bit_floor,
bit_width, rotr, rotl, countl_zero, countl_one, countr_zero,
countr_one, popcount)
def test_bit_cast():
"""
Test bit_cast with a signed 8bit wide integer type.
-127U = 0b1000'0001U
>>> test_bit_cast()
129
"""
cdef int8_t x = -127
cdef result = bit_cast[uint8_t, int8_t](x)
return result
def test_has_single_bit():
"""
Test has_single_bit with a unsigned 8bit wide integer type.
>>> test_has_single_bit()
True
"""
cdef uint8_t x = 1
cdef bint res = has_single_bit[uint8_t](x)
return res
def test_bit_ceil():
"""
Test bit_ceil with a unsigned 8bit wide integer type.
>>> test_bit_ceil()
4
"""
cdef uint8_t x = 3
cdef uint8_t res = bit_ceil[uint8_t](x)
return res
def test_bit_floor():
"""
Test bit_floor with a unsigned 8bit wide integer type.
>>> test_bit_floor()
4
"""
cdef uint8_t x = 5
cdef uint8_t res = bit_floor[uint8_t](x)
return res
def test_bit_width():
"""
Test bit_width with a unsigned 8bit wide integer type.
>>> test_bit_width()
3
"""
cdef uint8_t x = 5
cdef int res = bit_width[uint8_t](x)
return res
def test_rotl():
"""
Test rotl with a unsigned 8bit wide integer type.
>>> test_rotl()
209
"""
cdef uint8_t x = 29
cdef int s = 4
cdef uint8_t res = rotl[uint8_t](x, s)
return res
def test_rotr():
"""
Test rotr with a unsigned 8bit wide integer type.
>>> test_rotr()
142
"""
cdef uint8_t x = 29
cdef int s = 1
cdef uint8_t res = rotr[uint8_t](x, s)
return res
def test_countl_zero():
"""
Test countl_zero with a unsigned 8bit wide integer type.
>>> test_countl_zero()
3
"""
cdef uint8_t x = 24
cdef int res = countl_zero[uint8_t](x)
return res
def test_countr_zero():
"""
Test countr_zero with a unsigned 8bit wide integer type.
>>> test_countr_zero()
3
"""
cdef uint8_t x = 24
cdef int res = countr_zero[uint8_t](x)
return res
def test_countl_one():
"""
Test countl_one with a unsigned 8bit wide integer type.
>>> test_countl_one()
3
"""
cdef uint8_t x = 231
cdef int res = countl_one[uint8_t](x)
return res
def test_countr_one():
"""
Test countr_one with a unsigned 8bit wide integer type.
>>> test_countr_one()
3
"""
cdef uint8_t x = 231
cdef int res = countr_one[uint8_t](x)
return res
def test_popcount():
"""
Test popcount with a unsigned 8bit wide integer type.
>>> test_popcount()
8
"""
cdef uint8_t x = 255
cdef int res = popcount[uint8_t](x)
return res
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