1 files changed, 84 insertions, 0 deletions
diff --git a/libavcodec/mips/celp_math_mips.c b/libavcodec/mips/celp_math_mips.c
new file mode 100644
index 0000000..0af4171
--- /dev/null
+++ b/libavcodec/mips/celp_math_mips.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2012
+ *      MIPS Technologies, Inc., California.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Author:  Nedeljko Babic (nbabic@mips.com)
+ *
+ * Math operations optimized for MIPS
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Reference: libavcodec/celp_math.c
+ */
+#include "libavcodec/celp_math.h"
+
+static float ff_dot_productf_mips(const float* a, const float* b,
+                                              int length)
+{
+    float sum;
+    const float* a_end = a + length;
+
+    __asm__ __volatile__ (
+        "mtc1   $zero,      %[sum]                              \n\t"
+        "blez   %[length],  ff_dot_productf_end%=               \n\t"
+        "ff_dot_productf_madd%=:                                \n\t"
+        "lwc1   $f2,        0(%[a])                             \n\t"
+        "lwc1   $f1,        0(%[b])                             \n\t"
+        "addiu  %[a],       %[a],      4                        \n\t"
+        "addiu  %[b],       %[b],      4                        \n\t"
+        "madd.s %[sum],     %[sum],    $f1, $f2                 \n\t"
+        "bne   %[a],        %[a_end],  ff_dot_productf_madd%=   \n\t"
+        "ff_dot_productf_end%=:                                 \n\t"
+
+        : [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b)
+        : [a_end]"r"(a_end), [length] "r" (length)
+        : "$f1", "$f2"
+    );
+    return sum;
+}
+
+void ff_celp_math_init_mips(CELPMContext *c)
+{
+    c->dot_productf = ff_dot_productf_mips;
+}