BUG?: FPU instruction

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kidscracker

Joined: 29 Oct 2004
Posts: 46

kidscracker 19 Dec 2005, 20:52

I've been translating code in MASM to FASM and I've realised that in MASM intructions like:

Code:

fadd
..etc.

are coded correctly in MASM but in FASM it's not allowed that sintaxis, insteand of it I had to write:

Code:

faddp st0,st1   ; faddp insteand of fadd!!!
...etc.

the confusing thing is that the instruction isn't fadd, it's faddp!
the question is, Is it an error or sintaxis convention?

19 Dec 2005, 20:52

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8351
Location: Kraków, Poland

Tomasz Grysztar 19 Dec 2005, 21:50

Use "faddp" without any parameters instead - this convention taken from Intel's manuals.

19 Dec 2005, 21:50

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20299
Location: In your JS exploiting you and your system

revolution 20 Dec 2005, 01:57

Try this macro to support the plain fadd

Code:

irp op,add,sub,mul,div {
        macro f#op [args] \{
                \common
                if ~ args eq
                        f#op args
                else
                        f#op#p st0,st1
                end if
        \}
}

20 Dec 2005, 01:57

Madis731

Joined: 25 Sep 2003
Posts: 2139
Location: Estonia

Madis731 20 Dec 2005, 08:35

Offtopic:
I just came to a realization why FASM is good in these cases. When other assemblers include a lot of features in the main assembler - FASM leaves those rare cases and one-time-wishes to macros that everyone can choose to include or disclude. FASM itself remains interoperable over all systems. Small and efficient.

20 Dec 2005, 08:35

kidscracker

Joined: 29 Oct 2004
Posts: 46

kidscracker 22 Dec 2005, 01:17

Thanks!it worked!!!

22 Dec 2005, 01:17

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