[solved] fasm and fasmg float+float

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Roman

Joined: 21 Apr 2012
Posts: 1608

Roman 06 Mar 2020, 07:20

I have binary file.

Code:

p EQU 5.0
dd 10.0
dd 20.0
dd 30.0
dd 40.0
dd 50.0
dd 60.0
dd 70.0
dd 80.0
dd 90.0
dd 100.0

Some time i need re calculate values. And i must rewrite hands all this data !

Code:

dd 15.0
dd 25.0
dd 35.0
dd 45.0
dd 55.0
dd 65.0
dd 75.0
dd 85.0
dd 95.0
dd 105.0

How auto do this in fasmg ? Use macro or some else ?

06 Mar 2020, 07:20

Roman

Joined: 21 Apr 2012
Posts: 1608

Roman 06 Mar 2020, 07:31

I try this work
rept 5 n:0 {
dd 56.0,BortX,BortUpY,-n#.0,ScalBort
dd 56.0,BortX2,BortUpY,-n#.0,ScalBort
}

But this not work error
rept 5 n:0 {
dd 56.0,BortX,BortUpY,-n*5#.0,ScalBort
dd 56.0,BortX2,BortUpY,-n*5#.0,ScalBort
}

06 Mar 2020, 07:31

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19721
Location: In your JS exploiting you and your system

revolution 06 Mar 2020, 08:24

Dealing with binary floating point numbers is tricky. You need to separate the mantissa from the exponent, then do the addition, adjust the exponent and mantissa, and recombine into floating point format.

If would likely e easier to do everything in integers first and then add the final ".0" as the final step and let the assembler convert it to floating point.

06 Mar 2020, 08:24

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8250
Location: Kraków, Poland

Tomasz Grysztar 06 Mar 2020, 08:33

Roman wrote:

I try this work
rept 5 n:0 {
dd 56.0,BortX,BortUpY,-n#.0,ScalBort
dd 56.0,BortX2,BortUpY,-n#.0,ScalBort
}

But this not work error
rept 5 n:0 {
dd 56.0,BortX,BortUpY,-n*5#.0,ScalBort
dd 56.0,BortX2,BortUpY,-n*5#.0,ScalBort
}

You mentioned fasmg, but then you provided a sample in fasm 1 syntax. Which one do you mean? This works with fasmg:

Code:

rept 5 n:0
dd 56.0,BortX,BortUpY,-n*5#.0,ScalBort
dd 56.0,BortX2,BortUpY,-n*5#.0,ScalBort
end rept

but it is not possible with fasm 1 - there you would need a trick like revolution mentioned.

06 Mar 2020, 08:33

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19721
Location: In your JS exploiting you and your system

revolution 06 Mar 2020, 08:40

And in fasm where I mentioned doing the computations in integers:

Code:

rept 5 n:0 {
        rept 1 m:n*5 \{
                dd 56.0,BortX,BortUpY,-m\#.0,ScalBort
                dd 56.0,BortX2,BortUpY,-m\#.0,ScalBort
        \}
}

Untested though. Try it.

06 Mar 2020, 08:40

Roman

Joined: 21 Apr 2012
Posts: 1608

Roman 06 Mar 2020, 09:01

Thanks work !

06 Mar 2020, 09:01

Roman

Joined: 21 Apr 2012
Posts: 1608

Roman 06 Mar 2020, 09:03

But not work this:

Code:

rept 5 n:0 {
        rept 1 m:n*293 \{
                dd 56.0,BortX,BortUpY,-m\#.n,ScalBort
                dd 56.0,BortX2,BortUpY,-m\#.m,ScalBort
        \}
}

Fasm get error reserved word used as symbol

06 Mar 2020, 09:03

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19721
Location: In your JS exploiting you and your system

revolution 06 Mar 2020, 09:13

You have to combine the dot and the label with a hash:

Code:

dd 56.0,BortX,BortUpY,-m\#.\#n,ScalBort

06 Mar 2020, 09:13

Roman

Joined: 21 Apr 2012
Posts: 1608

Roman 06 Mar 2020, 09:16

Big thanks for you help !
I create 3d level for my Directx 12 game shooter.

This very help me fast and easy create 3d level float data.

06 Mar 2020, 09:16

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