How to optimize this code?

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sq4²

Joined: 31 Jul 2005
Posts: 13

sq4²

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: 2139
Location: Estonia

Madis731

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

Thank you very much!

19 Nov 2005, 15:01

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