ps2 idct patch by (Leon van Stuivenberg <leonvs at iae dot nl>)

Originally committed as revision 963 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 115 insertions, 0 deletions

diff --git a/libavcodec/ps2/dsputil_mmi.c b/libavcodec/ps2/dsputil_mmi.c
new file mode 100644
index 0000000000..ae5e925e74
--- /dev/null
+++ b/libavcodec/ps2/dsputil_mmi.c
@@ -0,0 +1,115 @@
+/*
+ * MMI optimized DSP utils
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * MMI optimization by Leon van Stuivenberg <leonvs@iae.nl>
+ */
+
+#include "../dsputil.h"
+
+void ff_mmi_idct(DCTELEM * block);
+
+#include "mmi.h"
+
+
+static void clear_blocks_mmi(DCTELEM * blocks)
+{
+    /* $4 = blocks */
+    int i;
+    for (i = 0; i < 6; i++) {
+        sq($0, 0, $4);
+        sq($0, 16, $4);
+        sq($0, 32, $4);
+        sq($0, 48, $4);
+        sq($0, 64, $4);
+        sq($0, 80, $4);
+        sq($0, 96, $4);
+        sq($0, 112, $4);
+        __asm__ __volatile__("addi $4, $4, 128");
+    }
+}
+
+
+static void put_pixels_clamped_mmi(const DCTELEM * block, UINT8 * pixels,
+				   int line_size)
+{
+    /* $4 = block, $5 = pixels, $6 = line_size */
+    __asm__ __volatile__("li $11, 255":::"$11");
+    lq($4, 0, $12);
+    pcpyld($11, $11, $11);
+    pcpyh($11, $11);
+
+#define PUT(rs) \
+    ppacb($0, $##rs, $##rs); \
+    sd3(rs, 0, 5); \
+    __asm__ __volatile__ ("add $5, $5, $6");
+
+    pminh($12, $11, $12);
+    pmaxh($12, $0, $12);
+    lq($4, 16, $13);
+    PUT(12);
+
+    pminh($13, $11, $13);
+    pmaxh($13, $0, $13);
+    lq($4, 32, $12);
+    PUT(13);
+
+    pminh($12, $11, $12);
+    pmaxh($12, $0, $12);
+    lq($4, 48, $13);
+    PUT(12);
+
+    pminh($13, $11, $13);
+    pmaxh($13, $0, $13);
+    lq($4, 64, $12);
+    PUT(13);
+
+    pminh($12, $11, $12);
+    pmaxh($12, $0, $12);
+    lq($4, 80, $13);
+    PUT(12);
+
+    pminh($13, $11, $13);
+    pmaxh($13, $0, $13);
+    lq($4, 96, $12);
+    PUT(13);
+
+    pminh($12, $11, $12);
+    pmaxh($12, $0, $12);
+    lq($4, 112, $13);
+    PUT(12);
+
+    pminh($13, $11, $13);
+    pmaxh($13, $0, $13);
+    PUT(13);
+}
+
+/* todo
+static void add_pixels_clamped_mmi(const DCTELEM * block, UINT8 * pixels,
+				   int line_size)
+{
+}
+*/
+
+
+void dsputil_init_mmi(void)
+{
+    put_pixels_clamped = put_pixels_clamped_mmi;
+    //add_pixels_clamped = add_pixels_clamped_mmi;
+    clear_blocks = clear_blocks_mmi;
+    ff_idct = ff_mmi_idct;
+}