summaryrefslogtreecommitdiff
path: root/media/libopus/silk/x86/NSQ_sse.c
blob: bb3c5f195570ebcd87ddc6b0f6f400bcce3b2127 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
/* 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.

   - 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.

   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.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <xmmintrin.h>
#include <emmintrin.h>
#include <smmintrin.h>
#include "main.h"
#include "celt/x86/x86cpu.h"
#include "stack_alloc.h"

static OPUS_INLINE void silk_nsq_scale_states_sse4_1(
    const silk_encoder_state *psEncC,           /* I    Encoder State                   */
    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
    const opus_int32    x_Q3[],                 /* I    input in Q3                     */
    opus_int32          x_sc_Q10[],             /* O    input scaled with 1/Gain        */
    const opus_int16    sLTP[],                 /* I    re-whitened LTP state in Q0     */
    opus_int32          sLTP_Q15[],             /* O    LTP state matching scaled input */
    opus_int            subfr,                  /* I    subframe number                 */
    const opus_int      LTP_scale_Q14,          /* I                                    */
    const opus_int32    Gains_Q16[ MAX_NB_SUBFR ], /* I                                 */
    const opus_int      pitchL[ MAX_NB_SUBFR ], /* I    Pitch lag                       */
    const opus_int      signal_type             /* I    Signal type                     */
);

static OPUS_INLINE void silk_noise_shape_quantizer_10_16_sse4_1(
    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
    opus_int            signalType,             /* I    Signal type                     */
    const opus_int32    x_sc_Q10[],             /* I                                    */
    opus_int8           pulses[],               /* O                                    */
    opus_int16          xq[],                   /* O                                    */
    opus_int32          sLTP_Q15[],             /* I/O  LTP state                       */
    const opus_int16    a_Q12[],                /* I    Short term prediction coefs     */
    const opus_int16    b_Q14[],                /* I    Long term prediction coefs      */
    const opus_int16    AR_shp_Q13[],           /* I    Noise shaping AR coefs          */
    opus_int            lag,                    /* I    Pitch lag                       */
    opus_int32          HarmShapeFIRPacked_Q14, /* I                                    */
    opus_int            Tilt_Q14,               /* I    Spectral tilt                   */
    opus_int32          LF_shp_Q14,             /* I                                    */
    opus_int32          Gain_Q16,               /* I                                    */
    opus_int            offset_Q10,             /* I                                    */
    opus_int            length,                 /* I    Input length                    */
    opus_int32          table[][4]              /* I                                    */
);

void silk_NSQ_sse4_1(
    const silk_encoder_state    *psEncC,                                    /* I/O  Encoder State                   */
    silk_nsq_state              *NSQ,                                       /* I/O  NSQ state                       */
    SideInfoIndices             *psIndices,                                 /* I/O  Quantization Indices            */
    const opus_int32            x_Q3[],                                     /* I    Prefiltered input signal        */
    opus_int8                   pulses[],                                   /* O    Quantized pulse signal          */
    const opus_int16            PredCoef_Q12[ 2 * MAX_LPC_ORDER ],          /* I    Short term prediction coefs     */
    const opus_int16            LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],    /* I    Long term prediction coefs      */
    const opus_int16            AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs             */
    const opus_int              HarmShapeGain_Q14[ MAX_NB_SUBFR ],          /* I    Long term shaping coefs         */
    const opus_int              Tilt_Q14[ MAX_NB_SUBFR ],                   /* I    Spectral tilt                   */
    const opus_int32            LF_shp_Q14[ MAX_NB_SUBFR ],                 /* I    Low frequency shaping coefs     */
    const opus_int32            Gains_Q16[ MAX_NB_SUBFR ],                  /* I    Quantization step sizes         */
    const opus_int              pitchL[ MAX_NB_SUBFR ],                     /* I    Pitch lags                      */
    const opus_int              Lambda_Q10,                                 /* I    Rate/distortion tradeoff        */
    const opus_int              LTP_scale_Q14                               /* I    LTP state scaling               */
)
{
    opus_int            k, lag, start_idx, LSF_interpolation_flag;
    const opus_int16    *A_Q12, *B_Q14, *AR_shp_Q13;
    opus_int16          *pxq;
    VARDECL( opus_int32, sLTP_Q15 );
    VARDECL( opus_int16, sLTP );
    opus_int32          HarmShapeFIRPacked_Q14;
    opus_int            offset_Q10;
    VARDECL( opus_int32, x_sc_Q10 );

    opus_int32   table[ 64 ][ 4 ];
    opus_int32   tmp1;
    opus_int32   q1_Q10, q2_Q10, rd1_Q20, rd2_Q20;

    SAVE_STACK;

    NSQ->rand_seed = psIndices->Seed;

    /* Set unvoiced lag to the previous one, overwrite later for voiced */
    lag = NSQ->lagPrev;

    silk_assert( NSQ->prev_gain_Q16 != 0 );

    offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ];

    /* 0 */
    q1_Q10  = offset_Q10;
    q2_Q10  = offset_Q10 + ( 1024 - QUANT_LEVEL_ADJUST_Q10 );
    rd1_Q20 = q1_Q10 * Lambda_Q10;
    rd2_Q20 = q2_Q10 * Lambda_Q10;

    table[ 32 ][ 0 ] = q1_Q10;
    table[ 32 ][ 1 ] = q2_Q10;
    table[ 32 ][ 2 ] = 2 * (q1_Q10 - q2_Q10);
    table[ 32 ][ 3 ] = (rd1_Q20 - rd2_Q20) + (q1_Q10 * q1_Q10 - q2_Q10 * q2_Q10);

    /* -1 */
    q1_Q10  = offset_Q10 - ( 1024 - QUANT_LEVEL_ADJUST_Q10 );
    q2_Q10  = offset_Q10;
    rd1_Q20 = - q1_Q10 * Lambda_Q10;
    rd2_Q20 = q2_Q10 * Lambda_Q10;

    table[ 31 ][ 0 ] = q1_Q10;
    table[ 31 ][ 1 ] = q2_Q10;
    table[ 31 ][ 2 ] = 2 * (q1_Q10 - q2_Q10);
    table[ 31 ][ 3 ] = (rd1_Q20 - rd2_Q20) + (q1_Q10 * q1_Q10 - q2_Q10 * q2_Q10);

    /* > 0 */
    for (k = 1; k <= 31; k++)
    {
        tmp1 = offset_Q10 + silk_LSHIFT( k, 10 );

        q1_Q10  = tmp1 - QUANT_LEVEL_ADJUST_Q10;
        q2_Q10  = tmp1 - QUANT_LEVEL_ADJUST_Q10 + 1024;
        rd1_Q20 = q1_Q10 * Lambda_Q10;
        rd2_Q20 = q2_Q10 * Lambda_Q10;

        table[ 32 + k ][ 0 ] = q1_Q10;
        table[ 32 + k ][ 1 ] = q2_Q10;
        table[ 32 + k ][ 2 ] = 2 * (q1_Q10 - q2_Q10);
        table[ 32 + k ][ 3 ] = (rd1_Q20 - rd2_Q20) + (q1_Q10 * q1_Q10 - q2_Q10 * q2_Q10);
    }

    /* < -1 */
    for (k = -32; k <= -2; k++)
    {
        tmp1 = offset_Q10 + silk_LSHIFT( k, 10 );

        q1_Q10  = tmp1 + QUANT_LEVEL_ADJUST_Q10;
        q2_Q10  = tmp1 + QUANT_LEVEL_ADJUST_Q10 + 1024;
        rd1_Q20 = - q1_Q10 * Lambda_Q10;
        rd2_Q20 = - q2_Q10 * Lambda_Q10;

        table[ 32 + k ][ 0 ] = q1_Q10;
        table[ 32 + k ][ 1 ] = q2_Q10;
        table[ 32 + k ][ 2 ] = 2 * (q1_Q10 - q2_Q10);
        table[ 32 + k ][ 3 ] = (rd1_Q20 - rd2_Q20) + (q1_Q10 * q1_Q10 - q2_Q10 * q2_Q10);
    }

    if( psIndices->NLSFInterpCoef_Q2 == 4 ) {
        LSF_interpolation_flag = 0;
    } else {
        LSF_interpolation_flag = 1;
    }

    ALLOC( sLTP_Q15,
           psEncC->ltp_mem_length + psEncC->frame_length, opus_int32 );
    ALLOC( sLTP, psEncC->ltp_mem_length + psEncC->frame_length, opus_int16 );
    ALLOC( x_sc_Q10, psEncC->subfr_length, opus_int32 );
    /* Set up pointers to start of sub frame */
    NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length;
    NSQ->sLTP_buf_idx     = psEncC->ltp_mem_length;
    pxq                   = &NSQ->xq[ psEncC->ltp_mem_length ];
    for( k = 0; k < psEncC->nb_subfr; k++ ) {
        A_Q12      = &PredCoef_Q12[ (( k >> 1 ) | ( 1 - LSF_interpolation_flag )) * MAX_LPC_ORDER ];
        B_Q14      = &LTPCoef_Q14[ k * LTP_ORDER ];
        AR_shp_Q13 = &AR2_Q13[     k * MAX_SHAPE_LPC_ORDER ];

        /* Noise shape parameters */
        silk_assert( HarmShapeGain_Q14[ k ] >= 0 );
        HarmShapeFIRPacked_Q14  =                          silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 );
        HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 );

        NSQ->rewhite_flag = 0;
        if( psIndices->signalType == TYPE_VOICED ) {
            /* Voiced */
            lag = pitchL[ k ];

            /* Re-whitening */
            if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) {
                /* Rewhiten with new A coefs */
                start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2;
                silk_assert( start_idx > 0 );

                silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ],
                    A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder, psEncC->arch );

                NSQ->rewhite_flag = 1;
                NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
            }
        }

        silk_nsq_scale_states_sse4_1( psEncC, NSQ, x_Q3, x_sc_Q10, sLTP, sLTP_Q15, k, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType );

        if ( opus_likely( ( 10 == psEncC->shapingLPCOrder ) && ( 16 == psEncC->predictLPCOrder) ) )
        {
            silk_noise_shape_quantizer_10_16_sse4_1( NSQ, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, A_Q12, B_Q14,
                AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ],
                offset_Q10, psEncC->subfr_length, &(table[32]) );
        }
        else
        {
            silk_noise_shape_quantizer( NSQ, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, A_Q12, B_Q14,
                AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ], Lambda_Q10,
                offset_Q10, psEncC->subfr_length, psEncC->shapingLPCOrder, psEncC->predictLPCOrder, psEncC->arch );
        }

        x_Q3   += psEncC->subfr_length;
        pulses += psEncC->subfr_length;
        pxq    += psEncC->subfr_length;
    }

    /* Update lagPrev for next frame */
    NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ];

    /* Save quantized speech and noise shaping signals */
    /* DEBUG_STORE_DATA( enc.pcm, &NSQ->xq[ psEncC->ltp_mem_length ], psEncC->frame_length * sizeof( opus_int16 ) ) */
    silk_memmove( NSQ->xq,           &NSQ->xq[           psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) );
    silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) );
    RESTORE_STACK;
}

/***********************************/
/* silk_noise_shape_quantizer_10_16  */
/***********************************/
static OPUS_INLINE void silk_noise_shape_quantizer_10_16_sse4_1(
    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
    opus_int            signalType,             /* I    Signal type                     */
    const opus_int32    x_sc_Q10[],             /* I                                    */
    opus_int8           pulses[],               /* O                                    */
    opus_int16          xq[],                   /* O                                    */
    opus_int32          sLTP_Q15[],             /* I/O  LTP state                       */
    const opus_int16    a_Q12[],                /* I    Short term prediction coefs     */
    const opus_int16    b_Q14[],                /* I    Long term prediction coefs      */
    const opus_int16    AR_shp_Q13[],           /* I    Noise shaping AR coefs          */
    opus_int            lag,                    /* I    Pitch lag                       */
    opus_int32          HarmShapeFIRPacked_Q14, /* I                                    */
    opus_int            Tilt_Q14,               /* I    Spectral tilt                   */
    opus_int32          LF_shp_Q14,             /* I                                    */
    opus_int32          Gain_Q16,               /* I                                    */
    opus_int            offset_Q10,             /* I                                    */
    opus_int            length,                 /* I    Input length                    */
    opus_int32          table[][4]              /* I                                    */
)
{
    opus_int     i;
    opus_int32   LTP_pred_Q13, LPC_pred_Q10, n_AR_Q12, n_LTP_Q13;
    opus_int32   n_LF_Q12, r_Q10, q1_Q0, q1_Q10, q2_Q10;
    opus_int32   exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10;
    opus_int32   tmp1, tmp2, sLF_AR_shp_Q14;
    opus_int32   *psLPC_Q14, *shp_lag_ptr, *pred_lag_ptr;

    __m128i xmm_tempa, xmm_tempb;

    __m128i xmm_one;

    __m128i psLPC_Q14_hi_01234567, psLPC_Q14_hi_89ABCDEF;
    __m128i psLPC_Q14_lo_01234567, psLPC_Q14_lo_89ABCDEF;
    __m128i a_Q12_01234567,        a_Q12_89ABCDEF;

    __m128i sAR2_Q14_hi_76543210, sAR2_Q14_lo_76543210;
    __m128i AR_shp_Q13_76543210;

    shp_lag_ptr  = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ];
    pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ];
    Gain_Q10     = silk_RSHIFT( Gain_Q16, 6 );

    /* Set up short term AR state */
    psLPC_Q14 = &NSQ->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 ];

    sLF_AR_shp_Q14 = NSQ->sLF_AR_shp_Q14;
    xq_Q14         = psLPC_Q14[ 0 ];
    LTP_pred_Q13   = 0;

    /* load a_Q12 */
    xmm_one = _mm_set_epi8( 1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10, 13, 12, 15, 14 );

    /* load a_Q12[0] - a_Q12[7] */
    a_Q12_01234567 = _mm_loadu_si128( (__m128i *)(&a_Q12[ 0 ] ) );
    /* load a_Q12[ 8 ] - a_Q12[ 15 ] */
    a_Q12_89ABCDEF = _mm_loadu_si128( (__m128i *)(&a_Q12[ 8 ] ) );

    a_Q12_01234567 = _mm_shuffle_epi8( a_Q12_01234567, xmm_one );
    a_Q12_89ABCDEF = _mm_shuffle_epi8( a_Q12_89ABCDEF, xmm_one );

    /* load AR_shp_Q13 */
    AR_shp_Q13_76543210 = _mm_loadu_si128( (__m128i *)(&AR_shp_Q13[0] ) );

    /* load psLPC_Q14 */
    xmm_one = _mm_set_epi8(15, 14, 11, 10, 7, 6, 3, 2, 13, 12, 9, 8, 5, 4, 1, 0 );

    xmm_tempa = _mm_loadu_si128( (__m128i *)(&psLPC_Q14[-16]) );
    xmm_tempb = _mm_loadu_si128( (__m128i *)(&psLPC_Q14[-12]) );

    xmm_tempa = _mm_shuffle_epi8( xmm_tempa, xmm_one );
    xmm_tempb = _mm_shuffle_epi8( xmm_tempb, xmm_one );

    psLPC_Q14_hi_89ABCDEF = _mm_unpackhi_epi64( xmm_tempa, xmm_tempb );
    psLPC_Q14_lo_89ABCDEF = _mm_unpacklo_epi64( xmm_tempa, xmm_tempb );

    xmm_tempa = _mm_loadu_si128( (__m128i *)(&psLPC_Q14[ -8 ]) );
    xmm_tempb = _mm_loadu_si128( (__m128i *)(&psLPC_Q14[ -4 ]) );

    xmm_tempa = _mm_shuffle_epi8( xmm_tempa, xmm_one );
    xmm_tempb = _mm_shuffle_epi8( xmm_tempb, xmm_one );

    psLPC_Q14_hi_01234567 = _mm_unpackhi_epi64( xmm_tempa, xmm_tempb );
    psLPC_Q14_lo_01234567 = _mm_unpacklo_epi64( xmm_tempa, xmm_tempb );

    /* load sAR2_Q14 */
    xmm_tempa = _mm_loadu_si128( (__m128i *)(&(NSQ->sAR2_Q14[ 0 ]) ) );
    xmm_tempb = _mm_loadu_si128( (__m128i *)(&(NSQ->sAR2_Q14[ 4 ]) ) );

    xmm_tempa = _mm_shuffle_epi8( xmm_tempa, xmm_one );
    xmm_tempb = _mm_shuffle_epi8( xmm_tempb, xmm_one );

    sAR2_Q14_hi_76543210 = _mm_unpackhi_epi64( xmm_tempa, xmm_tempb );
    sAR2_Q14_lo_76543210 = _mm_unpacklo_epi64( xmm_tempa, xmm_tempb );

    /* prepare 1 in 8 * 16bit */
    xmm_one = _mm_set1_epi16(1);

    for( i = 0; i < length; i++ )
    {
        /* Short-term prediction */
        __m128i xmm_hi_07, xmm_hi_8F, xmm_lo_07, xmm_lo_8F;

        /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */
        LPC_pred_Q10 = 8; /* silk_RSHIFT( predictLPCOrder, 1 ); */

        /* shift psLPC_Q14 */
        psLPC_Q14_hi_89ABCDEF = _mm_alignr_epi8( psLPC_Q14_hi_01234567, psLPC_Q14_hi_89ABCDEF, 2 );
        psLPC_Q14_lo_89ABCDEF = _mm_alignr_epi8( psLPC_Q14_lo_01234567, psLPC_Q14_lo_89ABCDEF, 2 );

        psLPC_Q14_hi_01234567 = _mm_srli_si128( psLPC_Q14_hi_01234567, 2 );
        psLPC_Q14_lo_01234567 = _mm_srli_si128( psLPC_Q14_lo_01234567, 2 );

        psLPC_Q14_hi_01234567 = _mm_insert_epi16( psLPC_Q14_hi_01234567, (xq_Q14 >> 16), 7 );
        psLPC_Q14_lo_01234567 = _mm_insert_epi16( psLPC_Q14_lo_01234567, (xq_Q14),       7 );

        /* high part, use pmaddwd, results in 4 32-bit */
        xmm_hi_07 = _mm_madd_epi16( psLPC_Q14_hi_01234567, a_Q12_01234567 );
        xmm_hi_8F = _mm_madd_epi16( psLPC_Q14_hi_89ABCDEF, a_Q12_89ABCDEF );

        /* low part, use pmulhw, results in 8 16-bit, note we need simulate unsigned * signed, _mm_srai_epi16(psLPC_Q14_lo_01234567, 15) */
        xmm_tempa = _mm_cmpgt_epi16( _mm_setzero_si128(), psLPC_Q14_lo_01234567 );
        xmm_tempb = _mm_cmpgt_epi16( _mm_setzero_si128(), psLPC_Q14_lo_89ABCDEF );

        xmm_tempa = _mm_and_si128( xmm_tempa, a_Q12_01234567 );
        xmm_tempb = _mm_and_si128( xmm_tempb, a_Q12_89ABCDEF );

        xmm_lo_07 = _mm_mulhi_epi16( psLPC_Q14_lo_01234567, a_Q12_01234567 );
        xmm_lo_8F = _mm_mulhi_epi16( psLPC_Q14_lo_89ABCDEF, a_Q12_89ABCDEF );

        xmm_lo_07 = _mm_add_epi16( xmm_lo_07, xmm_tempa );
        xmm_lo_8F = _mm_add_epi16( xmm_lo_8F, xmm_tempb );

        xmm_lo_07 = _mm_madd_epi16( xmm_lo_07, xmm_one );
        xmm_lo_8F = _mm_madd_epi16( xmm_lo_8F, xmm_one );

        /* accumulate */
        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, xmm_hi_8F );
        xmm_lo_07 = _mm_add_epi32( xmm_lo_07, xmm_lo_8F );

        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, xmm_lo_07 );

        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, _mm_unpackhi_epi64(xmm_hi_07, xmm_hi_07 ) );
        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, _mm_shufflelo_epi16(xmm_hi_07, 0x0E ) );

        LPC_pred_Q10 += _mm_cvtsi128_si32( xmm_hi_07 );

        /* Long-term prediction */
        if ( opus_likely( signalType == TYPE_VOICED ) ) {
            /* Unrolled loop */
            /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */
            LTP_pred_Q13 = 2;
            {
                __m128i b_Q14_3210, b_Q14_0123, pred_lag_ptr_0123;

                b_Q14_3210 = OP_CVTEPI16_EPI32_M64( b_Q14 );
                b_Q14_0123 = _mm_shuffle_epi32( b_Q14_3210, 0x1B );

                /* loaded: [0] [-1] [-2] [-3] */
                pred_lag_ptr_0123 = _mm_loadu_si128( (__m128i *)(&pred_lag_ptr[ -3 ] ) );
                /* shuffle to [-3] [-2] [-1] [0] and to new xmm */
                xmm_tempa = _mm_shuffle_epi32( pred_lag_ptr_0123, 0x1B );
                /*64-bit multiply, a[2] * b[-2], a[0] * b[0] */
                xmm_tempa = _mm_mul_epi32( xmm_tempa, b_Q14_3210 );
                /* right shift 2 bytes (16 bits), zero extended */
                xmm_tempa = _mm_srli_si128( xmm_tempa, 2 );

                /* a[1] * b[-1], a[3] * b[-3] */
                pred_lag_ptr_0123 = _mm_mul_epi32( pred_lag_ptr_0123, b_Q14_0123 );
                pred_lag_ptr_0123 = _mm_srli_si128( pred_lag_ptr_0123, 2 );

                pred_lag_ptr_0123 = _mm_add_epi32( pred_lag_ptr_0123, xmm_tempa );
                /* equal shift right 8 bytes*/
                xmm_tempa = _mm_shuffle_epi32( pred_lag_ptr_0123, _MM_SHUFFLE( 0, 0, 3, 2 ) );
                xmm_tempa = _mm_add_epi32( xmm_tempa, pred_lag_ptr_0123 );

                LTP_pred_Q13 += _mm_cvtsi128_si32( xmm_tempa );

                LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -4 ], b_Q14[ 4 ] );
                pred_lag_ptr++;
            }
        }

        /* Noise shape feedback */
        NSQ->sAR2_Q14[ 9 ] = NSQ->sAR2_Q14[ 8 ];
        NSQ->sAR2_Q14[ 8 ] = _mm_cvtsi128_si32( _mm_srli_si128(_mm_unpackhi_epi16( sAR2_Q14_lo_76543210, sAR2_Q14_hi_76543210 ), 12 ) );

        sAR2_Q14_hi_76543210 = _mm_slli_si128( sAR2_Q14_hi_76543210, 2 );
        sAR2_Q14_lo_76543210 = _mm_slli_si128( sAR2_Q14_lo_76543210, 2 );

        sAR2_Q14_hi_76543210 = _mm_insert_epi16( sAR2_Q14_hi_76543210, (xq_Q14 >> 16), 0 );
        sAR2_Q14_lo_76543210 = _mm_insert_epi16( sAR2_Q14_lo_76543210, (xq_Q14),       0 );

        /* high part, use pmaddwd, results in 4 32-bit */
        xmm_hi_07 = _mm_madd_epi16( sAR2_Q14_hi_76543210, AR_shp_Q13_76543210 );

        /* low part, use pmulhw, results in 8 16-bit, note we need simulate unsigned * signed,_mm_srai_epi16(sAR2_Q14_lo_76543210, 15) */
        xmm_tempa = _mm_cmpgt_epi16( _mm_setzero_si128(), sAR2_Q14_lo_76543210 );
        xmm_tempa = _mm_and_si128( xmm_tempa, AR_shp_Q13_76543210 );

        xmm_lo_07 = _mm_mulhi_epi16( sAR2_Q14_lo_76543210, AR_shp_Q13_76543210 );
        xmm_lo_07 = _mm_add_epi16( xmm_lo_07, xmm_tempa );

        xmm_lo_07 = _mm_madd_epi16( xmm_lo_07, xmm_one );

        /* accumulate */
        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, xmm_lo_07 );

        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, _mm_unpackhi_epi64(xmm_hi_07, xmm_hi_07 ) );
        xmm_hi_07 = _mm_add_epi32( xmm_hi_07, _mm_shufflelo_epi16(xmm_hi_07, 0x0E ) );

        n_AR_Q12 = 5 + _mm_cvtsi128_si32( xmm_hi_07 );

        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, NSQ->sAR2_Q14[ 8 ], AR_shp_Q13[ 8 ] );
        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, NSQ->sAR2_Q14[ 9 ], AR_shp_Q13[ 9 ] );

        n_AR_Q12 = silk_LSHIFT32( n_AR_Q12, 1 );                                /* Q11 -> Q12 */
        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, sLF_AR_shp_Q14, Tilt_Q14 );

        n_LF_Q12 = silk_SMULWB( NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - 1 ], LF_shp_Q14 );
        n_LF_Q12 = silk_SMLAWT( n_LF_Q12, sLF_AR_shp_Q14, LF_shp_Q14 );

        silk_assert( lag > 0 || signalType != TYPE_VOICED );

        /* Combine prediction and noise shaping signals */
        tmp1 = silk_SUB32( silk_LSHIFT32( LPC_pred_Q10, 2 ), n_AR_Q12 );        /* Q12 */
        tmp1 = silk_SUB32( tmp1, n_LF_Q12 );                                    /* Q12 */
        if( lag > 0 ) {
            /* Symmetric, packed FIR coefficients */
            n_LTP_Q13 = silk_SMULWB( silk_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 );
            n_LTP_Q13 = silk_SMLAWT( n_LTP_Q13, shp_lag_ptr[ -1 ],                      HarmShapeFIRPacked_Q14 );
            n_LTP_Q13 = silk_LSHIFT( n_LTP_Q13, 1 );
            shp_lag_ptr++;

            tmp2 = silk_SUB32( LTP_pred_Q13, n_LTP_Q13 );                       /* Q13 */
            tmp1 = silk_ADD_LSHIFT32( tmp2, tmp1, 1 );                          /* Q13 */
            tmp1 = silk_RSHIFT_ROUND( tmp1, 3 );                                /* Q10 */
        } else {
            tmp1 = silk_RSHIFT_ROUND( tmp1, 2 );                                /* Q10 */
        }

        r_Q10 = silk_SUB32( x_sc_Q10[ i ], tmp1 );                              /* residual error Q10 */

        /* Generate dither */
        NSQ->rand_seed = silk_RAND( NSQ->rand_seed );

        /* Flip sign depending on dither */
        tmp2 = -r_Q10;
        if ( NSQ->rand_seed < 0 ) r_Q10 = tmp2;

        r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 );

        /* Find two quantization level candidates and measure their rate-distortion */
        q1_Q10 = silk_SUB32( r_Q10, offset_Q10 );
        q1_Q0 = silk_RSHIFT( q1_Q10, 10 );

        q1_Q10 = table[q1_Q0][0];
        q2_Q10 = table[q1_Q0][1];

        if (r_Q10 * table[q1_Q0][2] - table[q1_Q0][3] < 0)
        {
            q1_Q10 = q2_Q10;
        }

        pulses[ i ] = (opus_int8)silk_RSHIFT_ROUND( q1_Q10, 10 );

        /* Excitation */
        exc_Q14 = silk_LSHIFT( q1_Q10, 4 );

        tmp2 = -exc_Q14;
        if ( NSQ->rand_seed < 0 ) exc_Q14 = tmp2;

        /* Add predictions */
        LPC_exc_Q14 = silk_ADD_LSHIFT32( exc_Q14, LTP_pred_Q13, 1 );
        xq_Q14      = silk_ADD_LSHIFT32( LPC_exc_Q14, LPC_pred_Q10, 4 );

        /* Update states */
        psLPC_Q14++;
        *psLPC_Q14 = xq_Q14;
        sLF_AR_shp_Q14 = silk_SUB_LSHIFT32( xq_Q14, n_AR_Q12, 2 );

        NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx ] = silk_SUB_LSHIFT32( sLF_AR_shp_Q14, n_LF_Q12, 2 );
        sLTP_Q15[ NSQ->sLTP_buf_idx ] = silk_LSHIFT( LPC_exc_Q14, 1 );
        NSQ->sLTP_shp_buf_idx++;
        NSQ->sLTP_buf_idx++;

        /* Make dither dependent on quantized signal */
        NSQ->rand_seed = silk_ADD32_ovflw( NSQ->rand_seed, pulses[ i ] );
    }

    NSQ->sLF_AR_shp_Q14 = sLF_AR_shp_Q14;

    /* Scale XQ back to normal level before saving */
    psLPC_Q14 = &NSQ->sLPC_Q14[ NSQ_LPC_BUF_LENGTH ];

    /* write back sAR2_Q14 */
    xmm_tempa = _mm_unpackhi_epi16( sAR2_Q14_lo_76543210, sAR2_Q14_hi_76543210 );
    xmm_tempb = _mm_unpacklo_epi16( sAR2_Q14_lo_76543210, sAR2_Q14_hi_76543210 );
    _mm_storeu_si128( (__m128i *)(&NSQ->sAR2_Q14[ 4 ]), xmm_tempa );
    _mm_storeu_si128( (__m128i *)(&NSQ->sAR2_Q14[ 0 ]), xmm_tempb );

    /* xq[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( psLPC_Q14[ i ], Gain_Q10 ), 8 ) ); */
    {
        __m128i xmm_Gain_Q10;
        __m128i xmm_xq_Q14_3210, xmm_xq_Q14_x3x1, xmm_xq_Q14_7654, xmm_xq_Q14_x7x5;

        /* prepare (1 << 7) in packed 4 32-bits */
        xmm_tempa = _mm_set1_epi32( (1 << 7) );

        /* prepare Gain_Q10 in packed 4 32-bits */
        xmm_Gain_Q10 = _mm_set1_epi32( Gain_Q10 );

        /* process xq */
        for (i = 0; i < length - 7; i += 8)
        {
            xmm_xq_Q14_3210 = _mm_loadu_si128( (__m128i *)(&(psLPC_Q14[ i + 0 ] ) ) );
            xmm_xq_Q14_7654 = _mm_loadu_si128( (__m128i *)(&(psLPC_Q14[ i + 4 ] ) ) );

            /* equal shift right 4 bytes*/
            xmm_xq_Q14_x3x1 = _mm_shuffle_epi32( xmm_xq_Q14_3210, _MM_SHUFFLE( 0, 3, 2, 1 ) );
            /* equal shift right 4 bytes*/
            xmm_xq_Q14_x7x5 = _mm_shuffle_epi32( xmm_xq_Q14_7654, _MM_SHUFFLE( 0, 3, 2, 1 ) );

            xmm_xq_Q14_3210 = _mm_mul_epi32( xmm_xq_Q14_3210, xmm_Gain_Q10 );
            xmm_xq_Q14_x3x1 = _mm_mul_epi32( xmm_xq_Q14_x3x1, xmm_Gain_Q10 );
            xmm_xq_Q14_7654 = _mm_mul_epi32( xmm_xq_Q14_7654, xmm_Gain_Q10 );
            xmm_xq_Q14_x7x5 = _mm_mul_epi32( xmm_xq_Q14_x7x5, xmm_Gain_Q10 );

            xmm_xq_Q14_3210 = _mm_srli_epi64( xmm_xq_Q14_3210, 16 );
            xmm_xq_Q14_x3x1 = _mm_slli_epi64( xmm_xq_Q14_x3x1, 16 );
            xmm_xq_Q14_7654 = _mm_srli_epi64( xmm_xq_Q14_7654, 16 );
            xmm_xq_Q14_x7x5 = _mm_slli_epi64( xmm_xq_Q14_x7x5, 16 );

            xmm_xq_Q14_3210 = _mm_blend_epi16( xmm_xq_Q14_3210, xmm_xq_Q14_x3x1, 0xCC );
            xmm_xq_Q14_7654 = _mm_blend_epi16( xmm_xq_Q14_7654, xmm_xq_Q14_x7x5, 0xCC );

            /* silk_RSHIFT_ROUND(xq, 8) */
            xmm_xq_Q14_3210 = _mm_add_epi32( xmm_xq_Q14_3210, xmm_tempa );
            xmm_xq_Q14_7654 = _mm_add_epi32( xmm_xq_Q14_7654, xmm_tempa );

            xmm_xq_Q14_3210 = _mm_srai_epi32( xmm_xq_Q14_3210, 8 );
            xmm_xq_Q14_7654 = _mm_srai_epi32( xmm_xq_Q14_7654, 8 );

            /* silk_SAT16 */
            xmm_xq_Q14_3210 = _mm_packs_epi32( xmm_xq_Q14_3210, xmm_xq_Q14_7654 );

            /* save to xq */
            _mm_storeu_si128( (__m128i *)(&xq[ i ] ), xmm_xq_Q14_3210 );
        }
    }
    for ( ; i < length; i++)
    {
        xq[i] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( psLPC_Q14[ i ], Gain_Q10 ), 8 ) );
    }

    /* Update LPC synth buffer */
    silk_memcpy( NSQ->sLPC_Q14, &NSQ->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) );
}

static OPUS_INLINE void silk_nsq_scale_states_sse4_1(
    const silk_encoder_state *psEncC,           /* I    Encoder State                   */
    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
    const opus_int32    x_Q3[],                 /* I    input in Q3                     */
    opus_int32          x_sc_Q10[],             /* O    input scaled with 1/Gain        */
    const opus_int16    sLTP[],                 /* I    re-whitened LTP state in Q0     */
    opus_int32          sLTP_Q15[],             /* O    LTP state matching scaled input */
    opus_int            subfr,                  /* I    subframe number                 */
    const opus_int      LTP_scale_Q14,          /* I                                    */
    const opus_int32    Gains_Q16[ MAX_NB_SUBFR ], /* I                                 */
    const opus_int      pitchL[ MAX_NB_SUBFR ], /* I    Pitch lag                       */
    const opus_int      signal_type             /* I    Signal type                     */
)
{
    opus_int   i, lag;
    opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q23;
    __m128i xmm_inv_gain_Q23, xmm_x_Q3_x2x0, xmm_x_Q3_x3x1;

    lag          = pitchL[ subfr ];
    inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 );
    silk_assert( inv_gain_Q31 != 0 );

    /* Calculate gain adjustment factor */
    if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) {
        gain_adj_Q16 =  silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 );
    } else {
        gain_adj_Q16 = (opus_int32)1 << 16;
    }

    /* Scale input */
    inv_gain_Q23 = silk_RSHIFT_ROUND( inv_gain_Q31, 8 );

    /* prepare inv_gain_Q23 in packed 4 32-bits */
    xmm_inv_gain_Q23 = _mm_set1_epi32(inv_gain_Q23);

    for( i = 0; i < psEncC->subfr_length - 3; i += 4 ) {
        xmm_x_Q3_x2x0 = _mm_loadu_si128( (__m128i *)(&(x_Q3[ i ] ) ) );

        /* equal shift right 4 bytes*/
        xmm_x_Q3_x3x1 = _mm_shuffle_epi32( xmm_x_Q3_x2x0, _MM_SHUFFLE( 0, 3, 2, 1 ) );

        xmm_x_Q3_x2x0 = _mm_mul_epi32( xmm_x_Q3_x2x0, xmm_inv_gain_Q23 );
        xmm_x_Q3_x3x1 = _mm_mul_epi32( xmm_x_Q3_x3x1, xmm_inv_gain_Q23 );

        xmm_x_Q3_x2x0 = _mm_srli_epi64( xmm_x_Q3_x2x0, 16 );
        xmm_x_Q3_x3x1 = _mm_slli_epi64( xmm_x_Q3_x3x1, 16 );

        xmm_x_Q3_x2x0 = _mm_blend_epi16( xmm_x_Q3_x2x0, xmm_x_Q3_x3x1, 0xCC );

        _mm_storeu_si128( (__m128i *)(&(x_sc_Q10[ i ] ) ), xmm_x_Q3_x2x0 );
    }

    for( ; i < psEncC->subfr_length; i++ ) {
        x_sc_Q10[ i ] = silk_SMULWW( x_Q3[ i ], inv_gain_Q23 );
    }

    /* Save inverse gain */
    NSQ->prev_gain_Q16 = Gains_Q16[ subfr ];

    /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */
    if( NSQ->rewhite_flag ) {
        if( subfr == 0 ) {
            /* Do LTP downscaling */
            inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 );
        }
        for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
            silk_assert( i < MAX_FRAME_LENGTH );
            sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] );
        }
    }

    /* Adjust for changing gain */
    if( gain_adj_Q16 != (opus_int32)1 << 16 ) {
        /* Scale long-term shaping state */
        __m128i xmm_gain_adj_Q16, xmm_sLTP_shp_Q14_x2x0, xmm_sLTP_shp_Q14_x3x1;

        /* prepare gain_adj_Q16 in packed 4 32-bits */
        xmm_gain_adj_Q16 = _mm_set1_epi32(gain_adj_Q16);

        for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx - 3; i += 4 )
        {
            xmm_sLTP_shp_Q14_x2x0 = _mm_loadu_si128( (__m128i *)(&(NSQ->sLTP_shp_Q14[ i ] ) ) );
            /* equal shift right 4 bytes*/
            xmm_sLTP_shp_Q14_x3x1 = _mm_shuffle_epi32( xmm_sLTP_shp_Q14_x2x0, _MM_SHUFFLE( 0, 3, 2, 1 ) );

            xmm_sLTP_shp_Q14_x2x0 = _mm_mul_epi32( xmm_sLTP_shp_Q14_x2x0, xmm_gain_adj_Q16 );
            xmm_sLTP_shp_Q14_x3x1 = _mm_mul_epi32( xmm_sLTP_shp_Q14_x3x1, xmm_gain_adj_Q16 );

            xmm_sLTP_shp_Q14_x2x0 = _mm_srli_epi64( xmm_sLTP_shp_Q14_x2x0, 16 );
            xmm_sLTP_shp_Q14_x3x1 = _mm_slli_epi64( xmm_sLTP_shp_Q14_x3x1, 16 );

            xmm_sLTP_shp_Q14_x2x0 = _mm_blend_epi16( xmm_sLTP_shp_Q14_x2x0, xmm_sLTP_shp_Q14_x3x1, 0xCC );

            _mm_storeu_si128( (__m128i *)(&(NSQ->sLTP_shp_Q14[ i ] ) ), xmm_sLTP_shp_Q14_x2x0 );
        }

        for( ; i < NSQ->sLTP_shp_buf_idx; i++ ) {
            NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] );
        }

        /* Scale long-term prediction state */
        if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) {
            for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
                sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] );
            }
        }

        NSQ->sLF_AR_shp_Q14 = silk_SMULWW( gain_adj_Q16, NSQ->sLF_AR_shp_Q14 );

        /* Scale short-term prediction and shaping states */
        for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) {
            NSQ->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLPC_Q14[ i ] );
        }
        for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) {
            NSQ->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sAR2_Q14[ i ] );
        }
    }
}