Comment by Const-me
8 days ago
> let alone more performant
Not anymore. On modern hardware, the only operation where integers win is single cycle add/sub. For the rest of operations (multiplication, division, square roots, etc.) floating point is faster, sometimes by a lot.
If you care about performance you use logs and then multiplications turn into integer additions.
On modern processors, floating point addition often has equal performance to floating point multiplication. For example, on AMD Zen4 it’s 3 cycles latency and 0.5 cycles throughput.
I’m not sure that trick going to work in the context of computer graphics. To transform vectors or multiply matrices you need a mix of multiplications and additions, or an equivalent sequence of FMAs.