This technique of SWAR (“SIMD within a register”) with very narrow elements and no hardware support is explained very well in an SO answer[1] (and the linked sl

This technique of SWAR (“SIMD within a register”) with very narrow elements and no hardware support is explained very well in an SO answer[1] (and the linked slides) about the mythical (and useless) “fusion trees”. [1] https://stackoverflow.com/a/56604876 https://stackoverflow.com/a/56604876