--- cbp_ppc.s	2002/03/22 12:24:07	1.4
+++ cbp_ppc.s	2002/03/22 13:39:01	1.7
@@ -15,13 +15,13 @@
 #    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
 #
-#    $Id: cbp_ppc.s,v 1.4 2002/03/22 12:24:07 canard Exp $
+#    $Id: cbp_ppc.s,v 1.7 2002/03/22 13:39:01 canard Exp $
 #    $Source: /home/xvid/cvs/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/Attic/cbp_ppc.s,v $
-#    $Date: 2002/03/22 12:24:07 $
+#    $Date: 2002/03/22 13:39:01 $
 #    $Author: canard $
 #
-#    This is the PPC ASM code I write. So I might do nasty things.
-#    Please send any comments to guillaume@morinfr.org
+#    This is my first PPC ASM attempt. So I might do nasty things.
+#    Please send any comments to <guillaume@morinfr.org>
 
 
 # Returns a field of bits that indicates non zero ac blocks
@@ -60,33 +60,24 @@
 	# r3 contains the result, therefore we set it to 0
 	xor 3,3,3
 .loop:
-	# r7 is the loop2 counter (columns), FIXME: use CTR
-	li 7,14
+	# CTR is the loop2 counter
+	li 4,15
+	mtctr 4
 	# r6 is coeff pointer for this line
 	mr 6,9
 .loop2:
 	# coeffs is a matrix of 16 bits cells
-	lha 4,2(6)
-	lha 5,4(6)
-	or 4,5,4
-	lha 5,6(6)
-	or 4,5,4
-	lha 5,8(6)
+	lwz 4,2(6)
+	lwz 5,6(6)
 	# or. updates CR0
 	or. 4,5,4
 	# testing bit 2 (is zero) of CR0
 	bf 2,.cbp
 	addi 6,6,8
-	# subic. updates CR0
-	subic. 7,7,1
-	# testing bit 0 (is negative) of CR0
-	bt 0,.lastcoeffs
-	b .loop2
-.lastcoeffs:
-	lha 4,2(6)
-	lha 5,4(6)
-	or 4,5,4
-	lha 5,6(6)
+	bdnz .loop2
+	# latest line coeffs 
+	lwz 4,2(6)
+	lhz 5,6(6)
 	# or. updates CR0
 	or. 4,5,4
 	# testing bit 2 (is zero) of CR0