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Index > Main > ERROR Assembling x64 instruction with FASM.DLL

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alorent



Joined: 05 Dec 2005
Posts: 201
alorent
Hi all,

I want to assemble a single x64 instruction with FASM.DLL. I use the DEMO program shipped with FASM.DLL

If I pass something like:

"use64 mov rax, 1122334455667788h"

It assembles correctly. But if I pass:

"use64 not rax"

It says "ERROR". Am I doing something wrong?

Thanks!
Post 25 Mar 2013, 10:15
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HaHaAnonymous



Joined: 02 Dec 2012
Posts: 1180
Location: Unknown
HaHaAnonymous
[ Post removed by author. ]


Last edited by HaHaAnonymous on 28 Feb 2015, 21:15; edited 1 time in total
Post 25 Mar 2013, 16:49
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alorent



Joined: 05 Dec 2005
Posts: 201
alorent
Thanks a lot! That worked! Smile
Post 26 Mar 2013, 09:55
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l_inc



Joined: 23 Oct 2009
Posts: 881
l_inc
I'm glad to know the original problem was resolved, but may be the author (of fasm) could comment on this undocumented feature allowing to put instructions or assembler directives on the same line with use16/32/64 directive?

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Post 26 Mar 2013, 14:33
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Bargest



Joined: 09 Feb 2012
Posts: 79
Location: Russia
Bargest
Quote:
his undocumented feature allowing to put instructions or assembler directives on the same line with use16/32/64 directive

I think it is just undocumented bug.Smile
Just because the original post says that not all instructions can be put on the same line with these directives.
Post 26 Mar 2013, 15:09
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7801
Location: Kraków, Poland
Tomasz Grysztar
It appears to be an ancient bug that went unnoticed for years just because nobody tried this combination. Smile It will be fixed in the next release.
Post 26 Mar 2013, 16:59
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l_inc



Joined: 23 Oct 2009
Posts: 881
l_inc
Tomasz Grysztar
I have a little list with some more ancient bugs, I think, but those mostly require a comprehensive discussion. Thus the following is just to make the next release a little bit more valuable. Smile
Code:
a equ ''
struc x {}
a x    

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Post 26 Mar 2013, 17:18
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7801
Location: Kraków, Poland
Tomasz Grysztar
This certainly cannot be a MORE ancient bug. The STRUC directive was introduced in 1.05, while the bug with use16/use32 allowing another instruction in the same line was there from the very beginning. Wink

[EDIT]I made some tests and it appears that this bug with STRUC was introduced some time around 1.65-1.66 versions. So it is a way younger one, though quite old still. Wink[/EDIT]
Post 26 Mar 2013, 17:26
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l_inc



Joined: 23 Oct 2009
Posts: 881
l_inc
Tomasz Grysztar
I meant more bugs, not more ancient. Smile

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Post 26 Mar 2013, 17:46
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