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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /*
     19 ------------------------------------------------------------------------------
     20    PacketVideo Corp.
     21    MP3 Decoder Library
     22 
     23    Pathname: ./cpp/include/pv_mp3dec_fxd_op_msc_evc.h
     24 
     25      Date: 08/20/2007
     26 
     27 ------------------------------------------------------------------------------
     28  REVISION HISTORY
     29 
     30  Description:
     31 ------------------------------------------------------------------------------
     32  INCLUDE DESCRIPTION
     33 
     34  This file select the associated fixed point functions with the OS/ARCH.
     35 
     36 
     37 ------------------------------------------------------------------------------
     38 */
     39 
     40 #ifndef PV_MP3DEC_FXD_OP_MSC_EVC_H
     41 #define PV_MP3DEC_FXD_OP_MSC_EVC_H
     42 
     43 
     44 #ifdef __cplusplus
     45 extern "C"
     46 {
     47 #endif
     48 
     49 #include "pvmp3_audio_type_defs.h"
     50 
     51 
     52 #if (defined(PV_ARM_MSC_EVC_V5)||defined(PV_ARM_MSC_EVC_V4))
     53 #include "armintr.h"
     54 #include "cmnintrin.h"
     55 
     56 
     57     __inline int32 fxp_mul32_Q30(const int32 a, const int32 b)
     58     {
     59         return (int32)(((int64)(a) * b) >> 30);
     60     }
     61 
     62 
     63     __inline int32 fxp_mac32_Q30(const int32 a, const int32 b, int32 L_add)
     64     {
     65         return (L_add + (int32)(((int64)(a) * b) >> 30));
     66     }
     67 
     68 
     69 #define Qfmt_31(a)   (int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F))
     70 
     71 #define Qfmt15(x)   (Int16)(x*((int32)1<<15) + (x>=0?0.5F:-0.5F))
     72 
     73 #define fxp_mul32_Q32( a,  b)   _MulHigh( b, a)
     74 
     75 
     76 
     77     __inline int32 fxp_mul32_Q28(const int32 a, const int32 b)
     78     {
     79         return (int32)(((int64)(a) * b) >> 28);
     80     }
     81 
     82 
     83     __inline int32 fxp_mul32_Q27(const int32 a, const int32 b)
     84     {
     85         return (int32)(((int64)(a) * b) >> 27);
     86     }
     87 
     88 
     89 
     90     __inline int32 fxp_mul32_Q26(const int32 a, const int32 b)
     91     {
     92         return (int32)(((int64)(a) * b) >> 26);
     93     }
     94 
     95 
     96     __inline int32 fxp_mac32_Q32(int32 L_add, const int32 a, const int32 b)
     97     {
     98         return (L_add + _MulHigh(b, a));
     99     }
    100 
    101 
    102     __inline int32 fxp_msb32_Q32(int32 L_sub, const int32 a, const int32 b)
    103     {
    104         return (L_sub - _MulHigh(b, a));
    105     }
    106 
    107 
    108 
    109     __inline int32 fxp_mul32_Q29(const int32 a, const int32 b)
    110     {
    111         return (int32)(((int64)(a) * b) >> 29);
    112     }
    113 
    114 
    115 
    116     __inline int32 pv_abs(int32 a)
    117     {
    118         int32 b = (a < 0) ? -a : a;
    119         return b;
    120     }
    121 
    122 
    123 
    124 #endif
    125 
    126 #ifdef __cplusplus
    127 }
    128 #endif
    129 
    130 
    131 #endif   /*  PV_MP3DEC_FXD_OP_MSC_EVC_H  */
    132 
    133