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ggml : fix Arm NEON feature detection #14278

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ggerganov
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While looking into #13168, I noticed that Q4_0 repacking is no longer applied on my Mac (#13168 (comment)). I traced this to incorrect sysctl string: "hw.optional.arm.AdvSIMD".

This was like this ever since #9331. @eddnjjn Could you take a look and confirm this fix is correct.

@github-actions github-actions bot added the ggml changes relating to the ggml tensor library for machine learning label Jun 19, 2025
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slaren commented Jun 19, 2025

Removed this code in #14281

@ggerganov ggerganov closed this Jun 19, 2025
@ggerganov ggerganov deleted the gg/arm-fix-neon-detection branch June 19, 2025 13:15
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eddnjjn commented Jun 23, 2025

Late to the party... I think hw.optional.AdvSIMD was replaced by hw.optional.arm.AdvSIMD in a recent OS update and that's why it stopped working. Anyway, this has now become obsolete with the multi-ISA/variant implementation.

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