How to optimize this code?

flat assembler
Message board for the users of flat assembler.

Index > Windows > How to optimize this code?

Author

Thread

sq4²

Joined: 31 Jul 2005
Posts: 13

sq4² 18 Nov 2005, 12:16

I have a long variable that contains following :
(using PureBasic)

Code:

a.b ;(minvalue)
b.b ;(maxvalue)
c.b ;(value)
varLong.l = 0<<24|a<<16|b<<8|c

Depending on minvalue and maxvalue :

Code:

a.b=varLong>>16
b.b=varLong>>8
c.b=varLong
if a<b
 c+1
 If c>b:c=a:EndIf
else
 c-1
 If c<b:c=a:EndIf
endif

varLong.l = 0<<24|a<<16|b<<8|c

There must be a really fast way to write this in inl. asm.
(but I am a complete idiot in asm)

Anybody?

18 Nov 2005, 12:16

Madis731

Joined: 25 Sep 2003
Posts: 2138
Location: Estonia

Madis731 19 Nov 2005, 14:39

You gave us pseudocode so pseudo-assembly right back at you Very Happy

Code:

c         db 0
b         db 0
a         db 0
EmptyByte db 0
varLong=c

...and the second one...

Code:

    mov eax,[varLong]
    ror eax,8
    cmp ah,al
jnb aNotBelow
    rol eax,8
    inc eax
    cmp al,ah
    jna @f
        mov al,[a]
    @@:
    jmp EndCompare
aNotBelow:
    rol eax,8
    dec eax
    cmp al,ah
    jnb @f
        mov al,[a]
    @@:
EndCompare:
    mov [varLong],eax

What do you want to do anyway? I think you just need a better algo, because the operations you make just seem...excuse me...stupid Sad

19 Nov 2005, 14:39

sq4²

Joined: 31 Jul 2005
Posts: 13

sq4² 19 Nov 2005, 15:01

Thank you very much!

19 Nov 2005, 15:01

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum