early-access version 1432

externals/ffmpeg/libavcodec/ppc/lossless_videodsp_altivec.c

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+/*
+ * Copyright (c) 2002 Brian Foley
+ * Copyright (c) 2002 Dieter Shirley
+ * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/ppc/cpu.h"
+#include "libavutil/ppc/util_altivec.h"
+
+#include "libavcodec/lossless_videodsp.h"
+
+#if HAVE_ALTIVEC
+static void add_bytes_altivec(uint8_t *dst, uint8_t *src, ptrdiff_t w)
+{
+    register int i;
+    register vector unsigned char vdst, vsrc;
+
+    /* dst and src are 16 bytes-aligned (guaranteed). */
+    for (i = 0; i + 15 < w; i += 16) {
+        vdst = vec_ld(i, (unsigned char *) dst);
+        vsrc = vec_ld(i, (unsigned char *) src);
+        vdst = vec_add(vsrc, vdst);
+        vec_st(vdst, i, (unsigned char *) dst);
+    }
+    /* If w is not a multiple of 16. */
+    for (; i < w; i++)
+        dst[i] = src[i];
+}
+#endif /* HAVE_ALTIVEC */
+
+av_cold void ff_llviddsp_init_ppc(LLVidDSPContext *c)
+{
+#if HAVE_ALTIVEC
+    if (!PPC_ALTIVEC(av_get_cpu_flags()))
+        return;
+
+    c->add_bytes = add_bytes_altivec;
+#endif /* HAVE_ALTIVEC */
+}