At Thu, 3 Apr 2025 14:00:16 +0200, Martin Husemann wrote: > > So these all nops are never executed just before any of f-line > > instructions. > > Can you also please explain how you got at that NOP-after-f-line woraround? > The Motorola errata text (at least the versions I found on the wayback > machine) does not actually recommend this (it mentions NOP only for the > instructions close to end of page bug).
The nop-before-f-line (correction: s/after/before/) workaround is noted as E4 at the original PR port-mac68k/13078. But I can't find any other materials... And I know about the exception-at-end-of-page bug (No.10), too. Whether this happens depends on the address of an unimplemented floating point instruction. The nop-before-f-line workaround affects (It may become to avoid or may become to hit) but doesn't improve the errata No.10. --- Tetsuya Isaki <is...@pastel-flower.jp / is...@netbsd.org>
