static ossl_inline size_t constant_time_is_zero_s(size_t a)
{
    return constant_time_msb_s(~a & (a - 1));
}
['static int test_is_zero_s(unsigned int a)\n{\n    if (a == 0 && !TEST_size_t_eq(constant_time_is_zero_s(a), CONSTTIME_TRUE_S))\n        return 0;\n    if (a != 0 && !TEST_uint_eq(constant_time_is_zero_s(a), CONSTTIME_FALSE_S))\n        return 0;\n    return 1;\n}', 'static ossl_inline size_t constant_time_is_zero_s(size_t a)\n{\n    return constant_time_msb_s(~a & (a - 1));\n}']