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 removed by author. ]

Thanks a lot! That worked!

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?

I think it is just undocumented bug.
Just because the original post says that not all instructions can be put on the same line with these directives.

It appears to be an ancient bug that went unnoticed for years just because nobody tried this combination. It will be fixed in the next release.

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.

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.

[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. [/EDIT]

Tomasz Grysztar
I meant more bugs, not more ancient.