Having trouble with MOVZX in 64bit assembly

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madmatt

Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA

madmatt 06 Feb 2009, 19:58

I've downloaded and installed the 64-bit version of Windows 7 and using it to do some 64bit programming and include adjustments, everything's working good so far except the MOVZX intruction, which gives me an error no matter what registers and size specifications I use. I've tried some of the suggestions in the intel docs but this hasn't worked. Maybe a bug? Confused

_________________
Gimme a sledge hammer! I'LL FIX IT!

06 Feb 2009, 19:58

MazeGen

Joined: 06 Oct 2003
Posts: 977
Location: Czechoslovakia

MazeGen 06 Feb 2009, 20:09

All of them work for me.

Code:

use64

movzx eax, al
movzx eax, ax

movzx rax, al
movzx rax, ax

MOVZX RAX, ECX doesn't exist because MOV EAX, ECX makes the same job.

06 Feb 2009, 20:09

madmatt

Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA

madmatt 06 Feb 2009, 21:02

[EDIT]

Sorry, my fault, I was doing things backwards.
something like:
local qalign:QWORD
movzx al, [qalign]
they work good when you use them the right way! Rolling Eyes

[note to self] THINK before you post! Laughing

06 Feb 2009, 21:02

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