x86: lpc: simd av_update_lls

4x-6x faster on sandybridge

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/libavutil/x86/lls_init.c b/libavutil/x86/lls_init.c
new file mode 100644
index 0000000000..8a80f83002
--- /dev/null
+++ b/libavutil/x86/lls_init.c
@@ -0,0 +1,38 @@
+/*
+ * linear least squares model
+ *
+ * Copyright (c) 2013 Loren Merritt
+ *
+ * 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 "libavutil/lls.h"
+#include "libavutil/x86/cpu.h"
+
+void ff_update_lls_sse2(LLSModel *m, double *var);
+void ff_update_lls_avx(LLSModel *m, double *var);
+
+av_cold void ff_init_lls_x86(LLSModel *m)
+{
+    int cpu_flags = av_get_cpu_flags();
+    if (EXTERNAL_SSE2(cpu_flags)) {
+        m->update_lls = ff_update_lls_sse2;
+    }
+    if (EXTERNAL_AVX(cpu_flags)) {
+        m->update_lls = ff_update_lls_avx;
+    }
+}