FLT_ROUNDS
FLT_ROUNDS, /* rounding */
strtorx_l(s, sp, FLT_ROUNDS, &result, locale);
assert(FLT_ROUNDS == 1);
assert(FLT_ROUNDS == 3);
assert(FLT_ROUNDS == 2);
assert(FLT_ROUNDS == 0);
assert(FLT_ROUNDS == 1);