static ossl_inline unsigned int constant_time_is_zero(unsigned int a)
{
    return constant_time_msb(~a & (a - 1));
}
['static int test_is_zero(unsigned int a)\n{\n    if (a == 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_TRUE))\n        return 0;\n    if (a != 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_FALSE))\n        return 0;\n    return 1;\n}', 'static ossl_inline unsigned int constant_time_is_zero(unsigned int a)\n{\n    return constant_time_msb(~a & (a - 1));\n}']