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2Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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4modification, are permitted provided that the following conditions
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6- Redistributions of source code must retain the above copyright notice,
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8- Redistributions in binary form must reproduce the above copyright
9notice, this list of conditions and the following disclaimer in the
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14permission.
15THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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26***********************************************************************/
27
28#ifdef HAVE_CONFIG_H
29#include "config.h"
30#endif
31
32#include "SigProc_FIX.h"
33
34/* Copy and multiply a vector by a constant */
35void silk_scale_copy_vector16(
36    opus_int16                  *data_out,
37    const opus_int16            *data_in,
38    opus_int32                  gain_Q16,           /* I    Gain in Q16                                                 */
39    const opus_int              dataSize            /* I    Length                                                      */
40)
41{
42    opus_int  i;
43    opus_int32 tmp32;
44
45    for( i = 0; i < dataSize; i++ ) {
46        tmp32 = silk_SMULWB( gain_Q16, data_in[ i ] );
47        data_out[ i ] = (opus_int16)silk_CHECK_FIT16( tmp32 );
48    }
49}
50
51/* Multiply a vector by a constant */
52void silk_scale_vector32_Q26_lshift_18(
53    opus_int32                  *data1,             /* I/O  Q0/Q18                                                      */
54    opus_int32                  gain_Q26,           /* I    Q26                                                         */
55    opus_int                    dataSize            /* I    length                                                      */
56)
57{
58    opus_int  i;
59
60    for( i = 0; i < dataSize; i++ ) {
61        data1[ i ] = (opus_int32)silk_CHECK_FIT32( silk_RSHIFT64( silk_SMULL( data1[ i ], gain_Q26 ), 8 ) );    /* OUTPUT: Q18 */
62    }
63}
64
65/* sum = for(i=0;i<len;i++)inVec1[i]*inVec2[i];      ---        inner product   */
66/* Note for ARM asm:                                                            */
67/*        * inVec1 and inVec2 should be at least 2 byte aligned.                */
68/*        * len should be positive 16bit integer.                               */
69/*        * only when len>6, memory access can be reduced by half.              */
70opus_int32 silk_inner_prod_aligned(
71    const opus_int16 *const     inVec1,             /*    I input vector 1                                              */
72    const opus_int16 *const     inVec2,             /*    I input vector 2                                              */
73    const opus_int              len                 /*    I vector lengths                                              */
74)
75{
76    opus_int   i;
77    opus_int32 sum = 0;
78    for( i = 0; i < len; i++ ) {
79        sum = silk_SMLABB( sum, inVec1[ i ], inVec2[ i ] );
80    }
81    return sum;
82}
83
84opus_int64 silk_inner_prod16_aligned_64(
85    const opus_int16            *inVec1,            /*    I input vector 1                                              */
86    const opus_int16            *inVec2,            /*    I input vector 2                                              */
87    const opus_int              len                 /*    I vector lengths                                              */
88)
89{
90    opus_int   i;
91    opus_int64 sum = 0;
92    for( i = 0; i < len; i++ ) {
93        sum = silk_SMLALBB( sum, inVec1[ i ], inVec2[ i ] );
94    }
95    return sum;
96}
97