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Yeager__David1
Beginner
259 Views

Possible error in Software Developer’s Manual

Hi,

I'm referring to this document:

Intel® 64 and IA-32 Architectures
Software Developer’s Manual
Combined Volumes:
1, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D and 4

Order Number: 325462-072US
May 2020

There looks to be an error in the instruction operand encoding descriptions when either VEX or EVEX can be used with the same instruction. For example, take a look at the instruction description for GF2P8AFFINEQB on page Vol. 2A 3-445

In the Instruction Operand Encoding table, second row for Op/En B, the entry for the Operand 2 column should say VEX.vvvv (r), not EVEX.vvvv (r) as it currently is written, since the B encoding is for AVX/VEX, not AVX512/EVEX.

This error is repeated throughout many instructions in this manual.

Can you please confirm that this is an error? I'm adding support for these encodings to our compiler and need to verify this.

Thanks,

David Yeager

 

 

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1 Reply
MarkC_Intel
Moderator
259 Views

Thanks. I'll pass this  along to our documentation team.

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