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* [RFC] i386: Remove Xeon Phi ISA support
@ 2023-12-01  2:20 Haochen Jiang
  2023-12-01  2:21 ` [PATCH] i386: Mark Xeon Phi ISAs as deprecated Haochen Jiang
  0 siblings, 1 reply; 9+ messages in thread
From: Haochen Jiang @ 2023-12-01  2:20 UTC (permalink / raw)
  To: gcc-patches; +Cc: hongtao.liu, ubizjak

Hi all,

Since Knight Landing and Knight Mill microarchitectures were EOL in 2019
and previously ICC and ICX has removed the support and emitted errors, we
would also like to remove the support in GCC to reduce maintainence effort.
The deprecated Xeon Phi ISAs are AVX512PF, AVX512ER, AVX5124VNNIW,
AVX5124FMAPS, PREFETCHWT1.

Our plan is to first emit a warning in GCC 14 to indicate that we will remove
them in GCC 15. And in GCC 15, we will remove the support if there is no
objection.

The patch following is the GCC 14 patch which mark them as deprecated.

Regtested on x86_64-pc-linux-gnu. Ok for trunk?

Thx,
Haochen



^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2023-12-08  6:07 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-12-01  2:20 [RFC] i386: Remove Xeon Phi ISA support Haochen Jiang
2023-12-01  2:21 ` [PATCH] i386: Mark Xeon Phi ISAs as deprecated Haochen Jiang
2023-12-01  7:04   ` Richard Biener
2023-12-01  7:33     ` Jiang, Haochen
2023-12-01  8:37       ` Richard Biener
2023-12-01  8:50         ` Jiang, Haochen
2023-12-06  2:32           ` Jiang, Haochen
2023-12-06  7:47             ` Richard Biener
2023-12-08  6:06               ` Hongtao Liu

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