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15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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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 */
silk_scale_copy_vector16(opus_int16 * data_out,const opus_int16 * data_in,opus_int32 gain_Q16,const opus_int dataSize)35 void 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 */
silk_scale_vector32_Q26_lshift_18(opus_int32 * data1,opus_int32 gain_Q26,opus_int dataSize)52 void 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. */
silk_inner_prod_aligned(const opus_int16 * const inVec1,const opus_int16 * const inVec2,const opus_int len)70 opus_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
silk_inner_prod16_aligned_64(const opus_int16 * inVec1,const opus_int16 * inVec2,const opus_int len)84 opus_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