Bitmap Blue Channel

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LostCoder

Joined: 07 Mar 2012
Posts: 22

LostCoder 16 May 2012, 21:40

shutdownall wrote:

On my computer I tried and lodsd is quite faster.

On my lodsd is the same as mov eax,dword[esi]/add esi,4. However lodsd takes only one byte, so it more friendly to loop unroll.

16 May 2012, 21:40

bzdashek

Joined: 15 Feb 2012
Posts: 147
Location: Tolstokvashino, Russia

bzdashek 17 May 2012, 04:30

I'm asking because on my Atom I tested one procedure in two varitants - with lodsb, and with mov al,byte[esi], used QueryPerformanceCounter to measure. The mean value of tests without lodsb was smaller than that with it. Thanks.

17 May 2012, 04:30

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