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diff --git a/media/libopus/silk/mips/macros_mipsr1.h b/media/libopus/silk/mips/macros_mipsr1.h
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+++ b/media/libopus/silk/mips/macros_mipsr1.h
@@ -0,0 +1,92 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- 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.
+- Neither the name of Internet Society, IETF or IETF Trust, nor the
+names of specific contributors, may be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
+***********************************************************************/
+
+
+#ifndef __SILK_MACROS_MIPSR1_H__
+#define __SILK_MACROS_MIPSR1_H__
+
+#define mips_clz(x) __builtin_clz(x)
+
+#undef silk_SMULWB
+static inline int silk_SMULWB(int a, int b)
+{
+    long long ac;
+    int c;
+
+    ac = __builtin_mips_mult(a, (opus_int32)(opus_int16)b);
+    c = __builtin_mips_extr_w(ac, 16);
+
+    return c;
+}
+
+#undef silk_SMLAWB
+#define silk_SMLAWB(a32, b32, c32)       ((a32) + silk_SMULWB(b32, c32))
+
+#undef silk_SMULWW
+static inline int silk_SMULWW(int a, int b)
+{
+    long long ac;
+    int c;
+
+    ac = __builtin_mips_mult(a, b);
+    c = __builtin_mips_extr_w(ac, 16);
+
+    return c;
+}
+
+#undef silk_SMLAWW
+static inline int silk_SMLAWW(int a, int b, int c)
+{
+    long long ac;
+    int res;
+
+    ac = __builtin_mips_mult(b, c);
+    res = __builtin_mips_extr_w(ac, 16);
+    res += a;
+
+    return res;
+}
+
+#define OVERRIDE_silk_CLZ16
+static inline opus_int32 silk_CLZ16(opus_int16 in16)
+{
+    int re32;
+    opus_int32 in32 = (opus_int32 )in16;
+    re32 = mips_clz(in32);
+    re32-=16;
+    return re32;
+}
+
+#define OVERRIDE_silk_CLZ32
+static inline opus_int32 silk_CLZ32(opus_int32 in32)
+{
+    int re32;
+    re32 = mips_clz(in32);
+    return re32;
+}
+
+#endif /* __SILK_MACROS_MIPSR1_H__ */