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Chris_S_3
Beginner
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Intel 64 documentation bug

This is for Intel 64 and IA-32 Architectures Software Developer’s Manual, Order Number: 325462-053 US January 2015. Page Vol. 1 5-29. 5.19 64-BIT MODE INSTRUCTIONS ... MOVZX (64-bits) Move doubleword to quadword, zero-extension In fact 32 to 64 bit zero extension isn't supported as per Vol. 2A 3-583. It is only spec'd for r/m8 and r/m16. There is a small chance that I'm misinterpreting that but then so is NASM which disallows this. Somebody's wrong and so I'd like an official ruling.
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MarkC_Intel
Moderator
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Yes, I believe that is a typo in Volume 1. I'll ask the documentation team to address it. Thank you for reporting this issue.

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