The microblog: 2014.01.13 20:47:49

2014.01.13 20:47:49 (422817277524713472) from Daniel J. Bernstein, replying to "Root Labs (@rootlabs)" (421798443309232128):

Intel 1-uop insns and AMD "fastpath" insns are, for obvious cost reasons, unlikely to allow microcode updates. See patent 6438664. @rootlabs


2014.01.10 22:37:08 (421757624078434304) from Daniel J. Bernstein:

Wanted: gcc patch to emit only probably-not-microcoded CPU insns by default, to limit impact of microcode updates; and OS compiled that way.

2014.01.11 01:19:20 (421798443309232128) from "Root Labs (@rootlabs)":

@hashbreaker I thought all Intel instructions are translated to uops, with the mappings all updateable.