sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions |
| 5 | are met: |
| 6 | - Redistributions of source code must retain the above copyright notice, |
| 7 | this list of conditions and the following disclaimer. |
| 8 | - Redistributions in binary form must reproduce the above copyright |
| 9 | notice, this list of conditions and the following disclaimer in the |
| 10 | documentation and/or other materials provided with the distribution. |
tlegrand@chromium.org | e3ea049 | 2013-10-23 09:13:50 +0000 | [diff] [blame] | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 12 | names of specific contributors, may be used to endorse or promote |
| 13 | products derived from this software without specific prior written |
| 14 | permission. |
tlegrand@chromium.org | e3ea049 | 2013-10-23 09:13:50 +0000 | [diff] [blame] | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | POSSIBILITY OF SUCH DAMAGE. |
| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "SigProc_FLP.h" |
| 33 | |
| 34 | /* inner product of two silk_float arrays, with result as double */ |
| 35 | double silk_inner_product_FLP( |
| 36 | const silk_float *data1, |
| 37 | const silk_float *data2, |
| 38 | opus_int dataSize |
| 39 | ) |
| 40 | { |
| 41 | opus_int i, dataSize4; |
| 42 | double result; |
| 43 | |
| 44 | /* 4x unrolled loop */ |
| 45 | result = 0.0; |
| 46 | dataSize4 = dataSize & 0xFFFC; |
| 47 | for( i = 0; i < dataSize4; i += 4 ) { |
| 48 | result += data1[ i + 0 ] * (double)data2[ i + 0 ] + |
| 49 | data1[ i + 1 ] * (double)data2[ i + 1 ] + |
| 50 | data1[ i + 2 ] * (double)data2[ i + 2 ] + |
| 51 | data1[ i + 3 ] * (double)data2[ i + 3 ]; |
| 52 | } |
| 53 | |
| 54 | /* add any remaining products */ |
| 55 | for( ; i < dataSize; i++ ) { |
| 56 | result += data1[ i ] * (double)data2[ i ]; |
| 57 | } |
| 58 | |
| 59 | return result; |
| 60 | } |