Strange FPU Command? Undocumented?

[johnsa]

So I was looking at some disassembly from some C# code... and found this line...

0000007b DF F1            fcomip      st,st(1)

So... I know of ficomp .. and i can't see any fcom instruction in the intel reference with the bytes DF F1.. am I missing something? :)

[johnsa]

Ignore me... I'm on flu medication and this post is complete junk... :)

[vanjast]

OK  :bg

[sinsi]

hey vanjast, nice website. Ice cream vans, lol
I reckon the better picture is http://www.vanjast.com/Duxford/P51FerociousFreddie.JPG though...

[herge]

 hi sinsi:

Is Duxford in England and south of Cambridge just off the M11
and home of Imperial War Museum.
They have a static Concorde aircraft on display.

Regards herge

[PBrennick]

Johnsa,

Don't be embarrassed. I have done worse and had to beg Hutch to remove the thread (a year or so ago as I recall). I wanted to crawl under a rock.

Use the attached Opcode Listview, it helps. The Pentium II version is ordered both ways in separate listviews making it easy to pinpoint an opcode.

-- Paul


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