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EVEX prefix (62h), used by AVX-512 and other new instruction sets, is listed as invalid in 64-bit mode #22

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Googulator opened this issue Aug 13, 2024 · 2 comments

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vex

Googulator commented Aug 13, 2024

62h is no longer invalid on CPUs that support AVX-512, AVX10 or APX. Instead, it's the first byte of the EVEX prefix.

mazegen added the vex label

Owner

mazegen commented Aug 13, 2024

Yes, VEX encoding is not supported at all now, I'm working on it.

62h is the first byte of EVEX prefix
C4h and C5h is the first byte of VEX prefix

Owner

mazegen commented Aug 13, 2024

See #8.

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