[Opus] Update to v1.2.1

third_party/opus/src/silk/arm/macros_armv5e.h

 /***********************************************************************
 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
 Copyright (c) 2013       Parrot
 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
@@ skipping 11 matching lines @@
 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_ARMv5E_H
 #define SILK_MACROS_ARMv5E_H
 
+/* This macro only avoids the undefined behaviour from a left shift of
+   a negative value. It should only be used in macros that can't include
+   SigProc_FIX.h. In other cases, use silk_LSHIFT32(). */
+#define SAFE_SHL(a,b) ((opus_int32)((opus_uint32)(a) << (b)))
+
 /* (a32 * (opus_int32)((opus_int16)(b32))) >> 16 output have to be 32bit int */
 #undef silk_SMULWB
 static OPUS_INLINE opus_int32 silk_SMULWB_armv5e(opus_int32 a, opus_int16 b)
 {
   int res;
   __asm__(
       "#silk_SMULWB\n\t"
       "smulwb %0, %1, %2\n\t"
       : "=r"(res)
       : "r"(a), "r"(b)
@@ skipping 141 matching lines @@
 #define silk_SUB_SAT32(a, b) (silk_SUB_SAT32_armv5e(a, b))
 
 #undef silk_CLZ16
 static OPUS_INLINE opus_int32 silk_CLZ16_armv5(opus_int16 in16)
 {
   int res;
   __asm__(
       "#silk_CLZ16\n\t"
       "clz %0, %1;\n"
       : "=r"(res)
-      : "r"(in16<<16|0x8000)
+      : "r"(SAFE_SHL(in16,16)|0x8000)
   );
   return res;
 }
 #define silk_CLZ16(in16) (silk_CLZ16_armv5(in16))
 
 #undef silk_CLZ32
 static OPUS_INLINE opus_int32 silk_CLZ32_armv5(opus_int32 in32)
 {
   int res;
   __asm__(
       "#silk_CLZ32\n\t"
       "clz %0, %1\n\t"
       : "=r"(res)
       : "r"(in32)
   );
   return res;
 }
 #define silk_CLZ32(in32) (silk_CLZ32_armv5(in32))
 
+#undef SAFE_SHL
+
 #endif /* SILK_MACROS_ARMv5E_H */