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Rockbox mail archiveSubject: Re: More efficient bitswap.sRe: More efficient bitswap.s
From: Magnus Holmgren <lear_at_algonet.se>
Date: Thu, 24 Oct 2002 14:18:21 +0200 (MEST) Ray Ransom wrote: > Here is a more efficient version of bitswap.s. It has one less instruction > in the all-important loop, fewer instructions in the initial test and uses > fewer registers. If any cares, it's attached. The last byte swap isn't correct: mov.b _at_r4,r1 extu.b r0,r1 mov.b _at_(r0,r1),r1 mov.b r1,_at_r4 Should be "extu.b r1,r1" (as in the first byte swap). Magnus
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