1 files changed, 80 insertions, 0 deletions
diff --git a/libavcodec/ppc/svq1enc_altivec.c b/libavcodec/ppc/svq1enc_altivec.c
new file mode 100644
index 0000000000..005239f430
--- /dev/null
+++ b/libavcodec/ppc/svq1enc_altivec.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "config.h"
+#if HAVE_ALTIVEC_H
+#include <altivec.h>
+#endif
+
+#include "libavutil/attributes.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#include "libavcodec/svq1enc.h"
+
+#if HAVE_ALTIVEC
+static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
+                                     int size)
+{
+    int i, size16 = size >> 4;
+    vector signed char vpix1;
+    vector signed short vpix2, vdiff, vpix1l, vpix1h;
+    union {
+        vector signed int vscore;
+        int32_t score[4];
+    } u = { .vscore = vec_splat_s32(0) };
+
+    while (size16) {
+        // score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
+        // load pix1 and the first batch of pix2
+
+        vpix1 = vec_unaligned_load(pix1);
+        vpix2 = vec_unaligned_load(pix2);
+        pix2 += 8;
+        // unpack
+        vpix1h = vec_unpackh(vpix1);
+        vdiff  = vec_sub(vpix1h, vpix2);
+        vpix1l = vec_unpackl(vpix1);
+        // load another batch from pix2
+        vpix2    = vec_unaligned_load(pix2);
+        u.vscore = vec_msum(vdiff, vdiff, u.vscore);
+        vdiff    = vec_sub(vpix1l, vpix2);
+        u.vscore = vec_msum(vdiff, vdiff, u.vscore);
+        pix1    += 16;
+        pix2    += 8;
+        size16--;
+    }
+    u.vscore = vec_sums(u.vscore, vec_splat_s32(0));
+
+    size %= 16;
+    for (i = 0; i < size; i++)
+        u.score[3] += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
+
+    return u.score[3];
+}
+#endif /* HAVE_ALTIVEC */
+
+av_cold void ff_svq1enc_init_ppc(SVQ1EncContext *c)
+{
+#if HAVE_ALTIVEC
+    c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
+#endif /* HAVE_ALTIVEC */
+}