[Opus] Update to v1.2.1

third_party/opus/src/silk/fixed/x86/prefilter_FIX_sse.c

 /* Copyright (c) 2014, Cisco Systems, INC
    Written by XiangMingZhu WeiZhou MinPeng YanWang
 
    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.
 
@@ skipping 89 matching lines @@
                 xmm_tempa = _mm_mul_epi32( coef_Q13_3210, xmm_tempa );
                 xmm_tempb = _mm_mul_epi32( coef_Q13_7654, xmm_tempb );
 
                 xmm_tempa = _mm_srli_epi64( xmm_tempa, 16 );
                 xmm_tempb = _mm_srli_epi64( xmm_tempb, 16 );
 
                 xmm_tempa = _mm_add_epi32( xmm_tempa, xmm_product1 );
                 xmm_tempb = _mm_add_epi32( xmm_tempb, xmm_product2 );
                 xmm_tempa = _mm_add_epi32( xmm_tempa, xmm_tempb );
 
-                sum  = (coef_Q13_8 * state_8) >> 16;
-                sum += (coef_Q13_9 * state_9) >> 16;
+                sum  = (opus_int32)((coef_Q13_8 * state_8) >> 16);
+                sum += (opus_int32)((coef_Q13_9 * state_9) >> 16);
 
                 xmm_tempa = _mm_add_epi32( xmm_tempa, _mm_shuffle_epi32( xmm_tempa, _MM_SHUFFLE( 0, 0, 0, 2 ) ) );
                 sum += _mm_cvtsi128_si32( xmm_tempa);
                 res_Q2[ n ] = silk_LSHIFT( (opus_int32)input[ n ], 2 ) - silk_RSHIFT_ROUND( ( 5 + sum ), 9);
 
                 /* move right */
                 state_a = state_9;
                 state_9 = state_8;
                 state_8 = _mm_cvtsi128_si32( state_4567 );
                 state_4567 = _mm_alignr_epi8( state_0123, state_4567, 4 );
@@ skipping 29 matching lines @@
             /* Output of allpass section */
             tmp1 = silk_SMLAWB( state[ i + 1 ], state[ i + 2 ] - tmp2, lambda_Q16 );
             state[ i + 1 ] = tmp2;
             acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ i ] );
         }
         state[ order ] = tmp1;
         acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ order - 1 ] );
         res_Q2[ n ] = silk_LSHIFT( (opus_int32)input[ n ], 2 ) - silk_RSHIFT_ROUND( acc_Q11, 9 );
     }
 }