Shorten innerloop by one instruction.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8542 a1c6a512-1295-4272-9138-f99709370657
diff --git a/apps/eq_cf.S b/apps/eq_cf.S
index f2440c2..c9458cd 100644
--- a/apps/eq_cf.S
+++ b/apps/eq_cf.S
@@ -40,14 +40,13 @@
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