Ruint v1.5.1

[recmo]

revm/main (i.e. primitive-types):

Hello, world!
elapsed: 37.219964ms
0: 37.392625ms
1: 37.153333ms
2: 37.009916ms
3: 36.769416ms
4: 36.76825ms
5: 36.764166ms
6: 36.758458ms
7: 36.747ms
8: 36.740208ms
9: 36.736666ms
10: 36.7195ms
11: 36.701208ms
12: 36.697458ms
13: 36.678541ms
14: 36.615916ms
15: 36.611208ms
16: 36.609416ms
17: 36.439375ms
18: 36.337541ms
19: 36.033916ms
20: 36.010416ms
21: 36.010083ms
22: 35.956041ms
23: 35.930833ms
24: 35.881125ms
end!

revm/ruint:

Hello, world!
elapsed: 37.030381ms
0: 37.128875ms
1: 36.823583ms
2: 36.773166ms
3: 36.563458ms
4: 36.40775ms
5: 36.315583ms
6: 36.203333ms
7: 36.140208ms
8: 36.137791ms
9: 36.130166ms
10: 36.097166ms
11: 36.0855ms
12: 36.0235ms
13: 35.998541ms
14: 35.965666ms
15: 35.948375ms
16: 35.93625ms
17: 35.92825ms
18: 35.927833ms
19: 35.921041ms
20: 35.920791ms
21: 35.910625ms
22: 35.856333ms
23: 35.852583ms
24: 35.8365ms
end!

~0.5% faster. not much, but it's a start :)

[recmo]

Computing whether a mul overflows is actually a surprising amount of extra work. Since we don't need that here, better to use the wrapping version. (No extra cost for add/sub, but changing those too for symmetry and to remove all uses of op2_u256_tuple.)