I don't -- unfortunately not too well-versed in this field! But I was a bit fascinated with SWAR after I randomly thought of how to prefix-sum with int multipli

I don't -- unfortunately not too well-versed in this field! But I was a bit fascinated with SWAR after I randomly thought of how to prefix-sum with int multiplication, later finding out that it is indeed an old trick as I suspected (I'm definitely not on this thread btw): https://mastodon.social/@dougall/109913251096277108 https://mastodon.social/@dougall/109913251096277108 As for 64-bit... well, I mostly avoid using high-end GPUs, but I was of the impression that i64 is just simulated. In fact, I was thinking of using the full warp as a "pipeline" to implement u32 division (mostly as a joke), almost like anti-SWAR. There was some old-ish paper detailing arithmetic latencies in GPUs and division was approximately more than 32x multiplication (...or I could be misremembering).