pulley: Implement 16x8 arithmetics #9904
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alexcrichton
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Dec 27, 2024
pulley/src/interp.rs
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| let b = self.state[operands.src2].get_u16x8(); | ||
| for (a, b) in a.iter_mut().zip(&b) { | ||
| // rounding average | ||
| *a = (*a & *b) + ((*a ^ *b) >> 1) + ((*a ^ *b) & 1); |
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Could this perhaps be written as *a = (u32::from(a) + u32::from(b) + 1) / 2? Basically the more classical version of an average which explicitly takes advantage of wider-precision arithmetic to avoid overflow issues.
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instantly convinced :))
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Helps #9783