[Ffmpeg-cvslog] r6037 - trunk/libavcodec/mpegaudiodec.c
michael
subversion
Mon Aug 21 00:18:26 CEST 2006
Author: michael
Date: Mon Aug 21 00:18:26 2006
New Revision: 6037
Modified:
trunk/libavcodec/mpegaudiodec.c
Log:
reorder butterflies to reduce memory load/store
Modified: trunk/libavcodec/mpegaudiodec.c
==============================================================================
--- trunk/libavcodec/mpegaudiodec.c (original)
+++ trunk/libavcodec/mpegaudiodec.c Mon Aug 21 00:18:26 2006
@@ -582,87 +582,96 @@
{
int tmp0, tmp1;
+
/* pass 1 */
BF(0, 31, COS0_0);
- BF(1, 30, COS0_1);
- BF(2, 29, COS0_2);
- BF(3, 28, COS0_3);
- BF(4, 27, COS0_4);
- BF(5, 26, COS0_5);
- BF(6, 25, COS0_6);
+ BF(15, 16, COS0_15);
+ /* pass 2 */
+ BF(0, 15, COS1_0);
+ BF(16, 31, -COS1_0);
+ /* pass 1 */
BF(7, 24, COS0_7);
BF(8, 23, COS0_8);
- BF(9, 22, COS0_9);
- BF(10, 21, COS0_10);
- BF(11, 20, COS0_11);
+ /* pass 2 */
+ BF(7, 8, COS1_7);
+ BF(23, 24, -COS1_7);
+ /* pass 3 */
+ BF(0, 7, COS2_0);
+ BF(8, 15, -COS2_0);
+ BF(16, 23, COS2_0);
+ BF(24, 31, -COS2_0);
+ /* pass 1 */
+ BF(3, 28, COS0_3);
BF(12, 19, COS0_12);
- BF(13, 18, COS0_13);
- BF(14, 17, COS0_14);
- BF(15, 16, COS0_15);
-
/* pass 2 */
- BF(0, 15, COS1_0);
- BF(1, 14, COS1_1);
- BF(2, 13, COS1_2);
BF(3, 12, COS1_3);
+ BF(19, 28, -COS1_3);
+ /* pass 1 */
+ BF(4, 27, COS0_4);
+ BF(11, 20, COS0_11);
+ /* pass 2 */
BF(4, 11, COS1_4);
- BF(5, 10, COS1_5);
- BF(6, 9, COS1_6);
- BF(7, 8, COS1_7);
+ BF(20, 27, -COS1_4);
+ /* pass 3 */
+ BF(3, 4, COS2_3);
+ BF(11, 12, -COS2_3);
+ BF(19, 20, COS2_3);
+ BF(27, 28, -COS2_3);
+ /* pass 4 */
+ BF(0, 3, COS3_0);
+ BF(4, 7, -COS3_0);
+ BF(8, 11, COS3_0);
+ BF(12, 15, -COS3_0);
+ BF(16, 19, COS3_0);
+ BF(20, 23, -COS3_0);
+ BF(24, 27, COS3_0);
+ BF(28, 31, -COS3_0);
- BF(16, 31, -COS1_0);
+
+
+ /* pass 1 */
+ BF(1, 30, COS0_1);
+ BF(14, 17, COS0_14);
+ /* pass 2 */
+ BF(1, 14, COS1_1);
BF(17, 30, -COS1_1);
- BF(18, 29, -COS1_2);
- BF(19, 28, -COS1_3);
- BF(20, 27, -COS1_4);
- BF(21, 26, -COS1_5);
+ /* pass 1 */
+ BF(6, 25, COS0_6);
+ BF(9, 22, COS0_9);
+ /* pass 2 */
+ BF(6, 9, COS1_6);
BF(22, 25, -COS1_6);
- BF(23, 24, -COS1_7);
-
/* pass 3 */
- BF(0, 7, COS2_0);
BF(1, 6, COS2_1);
- BF(2, 5, COS2_2);
- BF(3, 4, COS2_3);
-
- BF(8, 15, -COS2_0);
BF(9, 14, -COS2_1);
- BF(10, 13, -COS2_2);
- BF(11, 12, -COS2_3);
-
- BF(16, 23, COS2_0);
BF(17, 22, COS2_1);
- BF(18, 21, COS2_2);
- BF(19, 20, COS2_3);
-
- BF(24, 31, -COS2_0);
BF(25, 30, -COS2_1);
- BF(26, 29, -COS2_2);
- BF(27, 28, -COS2_3);
+ /* pass 1 */
+ BF(2, 29, COS0_2);
+ BF(13, 18, COS0_13);
+ /* pass 2 */
+ BF(2, 13, COS1_2);
+ BF(18, 29, -COS1_2);
+ /* pass 1 */
+ BF(5, 26, COS0_5);
+ BF(10, 21, COS0_10);
+ /* pass 2 */
+ BF(5, 10, COS1_5);
+ BF(21, 26, -COS1_5);
+ /* pass 3 */
+ BF(2, 5, COS2_2);
+ BF(10, 13, -COS2_2);
+ BF(18, 21, COS2_2);
+ BF(26, 29, -COS2_2);
/* pass 4 */
- BF(0, 3, COS3_0);
BF(1, 2, COS3_1);
-
- BF(4, 7, -COS3_0);
BF(5, 6, -COS3_1);
-
- BF(8, 11, COS3_0);
BF(9, 10, COS3_1);
-
- BF(12, 15, -COS3_0);
BF(13, 14, -COS3_1);
-
- BF(16, 19, COS3_0);
BF(17, 18, COS3_1);
-
- BF(20, 23, -COS3_0);
BF(21, 22, -COS3_1);
-
- BF(24, 27, COS3_0);
BF(25, 26, COS3_1);
-
- BF(28, 31, -COS3_0);
BF(29, 30, -COS3_1);
/* pass 5 */
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