Analyzing and Exploiting Branch Mispredictions in Microcode · HackerPapers discussions

Analyzing and Exploiting Branch Mispredictions in Microcode — mentioned by sweetjuly

Fri, 07 Mar 2025 05:05:47 GMT

It's not especially likely you'll be able to make things faster unless you're really strapped for fetch bandwidth. The reasoning is that most useful uops will already have instructions which directly decode to them (ie you're not going to get a faster load with ucode than if you just used a normal load instruction). In fact, given that ucode branches are (typically?) only statically predicted [1], you may well see worse performance if you need to use ucode branches with non-statically predictable directions. CPU vendors typically gain performance when adding new instructions because they add…

Paper and discussion history. A mention is not an endorsement.

Analyzing and Exploiting Branch Mispredictions in Microcode — HN submission

Tue, 28 Jan 2025 17:35:48 GMT

Analyzing and Exploiting Branch Mispredictions in Microcode

2 points; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.

Analyzing and Exploiting Branch Mispredictions in Microcode — HN submission

Mon, 27 Jan 2025 09:26:50 GMT

Analyzing and Exploiting Branch Mispredictions in Microcode [pdf]

3 points; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.