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Shorten innerloop by one instruction.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8542 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2006-02-02 22:11:10 +00:00
parent 0ecd0b0fc2
commit 3495e75719
1 changed files with 5 additions and 6 deletions
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11
apps/eq_cf.S
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@ -40,14 +40,13 @@ eq_filter:
where y[] is output and x[] is input. This is performed out of order
to do parallel load of input value.
*/
mac.l %a1, %d0, (%a6), %d4, %acc0 | acc = b1*x[i - 1], x[i] -> d4
mac.l %a2, %d1, %acc0 | acc += b2*x[i - 2]
mac.l %a0, %d4, %acc0 | acc += b0*x[i]
mac.l %a2, %d1, %acc0 | acc = b2*x[i - 2]
move.l %d0, %d1 | fix input history
mac.l %a1, %d0, (%a6), %d0, %acc0 | acc += b1*x[i - 1], x[i] -> d0
mac.l %a0, %d0, %acc0 | acc += b0*x[i]
mac.l %a3, %d2, %acc0 | acc += a1*y[i - 1]
mac.l %a4, %d3, %acc0 | acc += a2*y[i - 2]
move.l %d0, %d1 | fix history
move.l %d4, %d0
move.l %d2, %d3
move.l %d2, %d3 | fix output history
movclr.l %acc0, %d2 | fetch and write result
asl.l %d7, %d2 | restore fixed point format
move.l %d2, (%a6)+ | save result