* Accumulating PPC_FEATURE_ARCH bits
@ 2013-02-18 17:06 Richard Henderson
0 siblings, 0 replies; only message in thread
From: Richard Henderson @ 2013-02-18 17:06 UTC (permalink / raw)
To: linuxppc-dev
If one wants to test the PPC_FEATURE_ARCH_ISA_2_0[56] bits, one has to
be careful that if 2_06 is set, 2_05 won't be. This seems illogical to
me: given that 2.06 includes all of the 2.05 instructions, it would make
most sense if both bits were set in the hwcap.
Now, obviously I have to code around existing practice, but going
forward this isn't tennable. When a Power 2.07 ISA is released, I'd
rather not have existing programs degrade because suddenly the 2_06 bit
is no longer set.
Thanks,
r~
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2013-02-18 17:06 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-02-18 17:06 Accumulating PPC_FEATURE_ARCH bits Richard Henderson
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.