FreeCalypso > hg > gsm-codec-lib
view libtwamr/mac_32.h @ 417:f17e42c63058
libtwamr: integrate ol_ltp.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 07 May 2024 03:21:14 +0000 |
parents | 61047a2912a2 |
children |
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/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : mac_32.h * Purpose : 32 x 32 and 32 x 16 bit DPF multiy & accumulate * (similar as Mpy_32 and Mpy_32_16 in oper_32b.c) * ******************************************************************************** */ /* ******************************************************************************** * MODULE INCLUDE FILE AND VERSION ID ******************************************************************************** */ #ifndef mac_32_h #define mac_32_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "typedef.h" /* ******************************************************************************** * PUBLIC PROGRAM CODE ******************************************************************************** */ /***************************************************************************** * Function Mac_32() * * * * Multiply two 32 bit integers (DPF) and accumulate with (normal) 32 bit * * integer. The multiplication result is divided by 2**31 * * * * L_32 = L_32 + (hi1*hi2)<<1 + ( (hi1*lo2)>>15 + (lo1*hi2)>>15 )<<1 * * * * This operation can also be viewed as the multiplication of two Q31 * * number and the result is also in Q31. * * * * Arguments: * * * * hi1 hi part of first number * * lo1 lo part of first number * * hi2 hi part of second number * * lo2 lo part of second number * * * ***************************************************************************** */ Word32 Mac_32 (Word32 L_32, Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2); /***************************************************************************** * Function Mac_32_16() * * * * Multiply a 16 bit integer by a 32 bit (DPF) and accumulate with (normal)* * 32 bit integer. The multiplication result is divided by 2**15 * * * * * * L_32 = L_32 + (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 * * * * Arguments: * * * * hi hi part of 32 bit number. * * lo lo part of 32 bit number. * * n 16 bit number. * * * ***************************************************************************** */ Word32 Mac_32_16 (Word32 L_32, Word16 hi, Word16 lo, Word16 n); #endif