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annotate libtwamr/mac_32.h @ 458:e26b974f7ba3

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doc/AMR-study-utils: update for the current situation
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 18:45:36 +0000
parents 61047a2912a2
children
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61047a2912a2 libtwamr: integrate mac_32.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : mac_32.h
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11 * Purpose : 32 x 32 and 32 x 16 bit DPF multiy & accumulate
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12 * (similar as Mpy_32 and Mpy_32_16 in oper_32b.c)
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13 *
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14 ********************************************************************************
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15 */
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16
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17 /*
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18 ********************************************************************************
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19 * MODULE INCLUDE FILE AND VERSION ID
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20 ********************************************************************************
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21 */
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22 #ifndef mac_32_h
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23 #define mac_32_h "$Id $"
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24
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25 /*
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26 ********************************************************************************
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27 * INCLUDE FILES
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28 ********************************************************************************
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29 */
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30 #include "typedef.h"
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31
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32 /*
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33 ********************************************************************************
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34 * PUBLIC PROGRAM CODE
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35 ********************************************************************************
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36 */
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37
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38 /*****************************************************************************
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39 * Function Mac_32() *
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40 * *
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41 * Multiply two 32 bit integers (DPF) and accumulate with (normal) 32 bit *
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42 * integer. The multiplication result is divided by 2**31 *
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43 * *
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44 * L_32 = L_32 + (hi1*hi2)<<1 + ( (hi1*lo2)>>15 + (lo1*hi2)>>15 )<<1 *
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45 * *
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46 * This operation can also be viewed as the multiplication of two Q31 *
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47 * number and the result is also in Q31. *
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48 * *
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49 * Arguments: *
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50 * *
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51 * hi1 hi part of first number *
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52 * lo1 lo part of first number *
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53 * hi2 hi part of second number *
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54 * lo2 lo part of second number *
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55 * *
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56 *****************************************************************************
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57 */
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58
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59 Word32 Mac_32 (Word32 L_32, Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2);
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60
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61 /*****************************************************************************
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62 * Function Mac_32_16() *
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63 * *
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64 * Multiply a 16 bit integer by a 32 bit (DPF) and accumulate with (normal)*
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65 * 32 bit integer. The multiplication result is divided by 2**15 *
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66 * *
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67 * *
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68 * L_32 = L_32 + (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 *
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69 * *
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70 * Arguments: *
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71 * *
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72 * hi hi part of 32 bit number. *
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73 * lo lo part of 32 bit number. *
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74 * n 16 bit number. *
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75 * *
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76 *****************************************************************************
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77 */
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78
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79 Word32 Mac_32_16 (Word32 L_32, Word16 hi, Word16 lo, Word16 n);
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80
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81 #endif