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annotate libtwamr/mac_32.c @ 470:ea89eb8291bf

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libgsmefr: add RTP-encoded DHF const datum to public API
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 14 May 2024 07:13:59 +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.c
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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 #include "namespace.h"
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23 #include "mac_32.h"
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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 #include "basic_op.h"
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32 #include "oper_32b.h"
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33 #include "no_count.h"
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34
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35 /*
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36 ********************************************************************************
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37 * PUBLIC PROGRAM CODE
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38 ********************************************************************************
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39 */
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40
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41 /*****************************************************************************
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42 * Function Mac_32() *
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43 * *
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44 * Multiply two 32 bit integers (DPF) and accumulate with (normal) 32 bit *
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45 * integer. The multiplication result is divided by 2**31 *
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46 * *
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47 * L_32 = L_32 + (hi1*hi2)<<1 + ( (hi1*lo2)>>15 + (lo1*hi2)>>15 )<<1 *
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48 * *
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49 * This operation can also be viewed as the multiplication of two Q31 *
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50 * number and the result is also in Q31. *
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51 * *
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52 * Arguments: *
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53 * *
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54 * hi1 hi part of first number *
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55 * lo1 lo part of first number *
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56 * hi2 hi part of second number *
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57 * lo2 lo part of second number *
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58 * *
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59 *****************************************************************************
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60 */
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61
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62 Word32 Mac_32 (Word32 L_32, Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2)
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63 {
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64 L_32 = L_mac (L_32, hi1, hi2);
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65 L_32 = L_mac (L_32, mult (hi1, lo2), 1);
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66 L_32 = L_mac (L_32, mult (lo1, hi2), 1);
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67
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68 return (L_32);
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69 }
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70
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71 /*****************************************************************************
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72 * Function Mac_32_16() *
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73 * *
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74 * Multiply a 16 bit integer by a 32 bit (DPF) and accumulate with (normal)*
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75 * 32 bit integer. The multiplication result is divided by 2**15 *
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76 * *
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77 * *
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78 * L_32 = L_32 + (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 *
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79 * *
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80 * Arguments: *
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81 * *
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82 * hi hi part of 32 bit number. *
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83 * lo lo part of 32 bit number. *
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84 * n 16 bit number. *
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85 * *
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86 *****************************************************************************
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87 */
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88
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89 Word32 Mac_32_16 (Word32 L_32, Word16 hi, Word16 lo, Word16 n)
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90 {
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91 L_32 = L_mac (L_32, hi, n);
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92 L_32 = L_mac (L_32, mult (lo, n), 1);
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93
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94 return (L_32);
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95 }