2024.01.18 17:59:00 (Mastodon 111778250109963254, Twitter 1748042329515008381) from Daniel J. Bernstein:
Puzzled by AMD manuals saying that VPMASKMOV might fault on unused addresses. Does it actually do that on any AMD chips? Intel manuals guarantee it won't, making it useful for 256-bit processing of array lengths that aren't multiples of 256 bits, but could such code crash on AMD?