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 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 31 Filename: /audio/gsm_amr/c/include/l_add.h 32 33 ------------------------------------------------------------------------------ 34 REVISION HISTORY 35 36 Description: Created separate header file for L_add function. 37 38 Description: Changed function prototype declaration. A pointer to the overflow 39 flag is being passed in as a parameter instead of using global 40 data. 41 42 Description: Updated template. Changed paramter name from overflow to 43 pOverflow 44 45 Description: Moved _cplusplus #ifdef after Include section. 46 47 Description: Providing support for ARM and Linux-ARM assembly instructions. 48 49 Who: Date: 50 Description: 51 52 ------------------------------------------------------------------------------ 53 INCLUDE DESCRIPTION 54 55 This file contains all the constant definitions and prototype definitions 56 needed by the L_add function. 57 58 ------------------------------------------------------------------------------ 59 */ 60 61 /*---------------------------------------------------------------------------- 62 ; CONTINUE ONLY IF NOT ALREADY DEFINED 63 ----------------------------------------------------------------------------*/ 64 #ifndef L_ADD_H 65 #define L_ADD_H 66 67 /*---------------------------------------------------------------------------- 68 ; INCLUDES 69 ----------------------------------------------------------------------------*/ 70 #include "basicop_malloc.h" 71 72 /*--------------------------------------------------------------------------*/ 73 #ifdef __cplusplus 74 extern "C" 75 { 76 #endif 77 78 /*---------------------------------------------------------------------------- 79 ; MACROS 80 ; Define module specific macros here 81 ----------------------------------------------------------------------------*/ 82 83 /*---------------------------------------------------------------------------- 84 ; DEFINES 85 ; Include all pre-processor statements here. 86 ----------------------------------------------------------------------------*/ 87 88 /*---------------------------------------------------------------------------- 89 ; EXTERNAL VARIABLES REFERENCES 90 ; Declare variables used in this module but defined elsewhere 91 ----------------------------------------------------------------------------*/ 92 93 /*---------------------------------------------------------------------------- 94 ; SIMPLE TYPEDEF'S 95 ----------------------------------------------------------------------------*/ 96 97 /*---------------------------------------------------------------------------- 98 ; ENUMERATED TYPEDEF'S 99 ----------------------------------------------------------------------------*/ 100 101 /*---------------------------------------------------------------------------- 102 ; STRUCTURES TYPEDEF'S 103 ----------------------------------------------------------------------------*/ 104 105 /*---------------------------------------------------------------------------- 106 ; GLOBAL FUNCTION DEFINITIONS 107 ; Function Prototype declaration 108 ----------------------------------------------------------------------------*/ 109 #if defined(PV_ARM_V5) /* Instructions for ARM Assembly on ADS*/ 110 111 __inline Word32 L_add(register Word32 L_var1, register Word32 L_var2, Flag *pOverflow) 112 { 113 Word32 result; 114 115 OSCL_UNUSED_ARG(pOverflow); 116 __asm 117 { 118 QADD result, L_var1, L_var2 119 } 120 return(result); 121 } 122 123 #elif defined(PV_ARM_GCC_V5) /* Instructions for ARM-linux cross-compiler*/ 124 125 __inline Word32 L_add(register Word32 L_var1, register Word32 L_var2, Flag *pOverflow) 126 { 127 register Word32 ra = L_var1; 128 register Word32 rb = L_var2; 129 Word32 result; 130 131 OSCL_UNUSED_ARG(pOverflow); 132 133 asm volatile("qadd %0, %1, %2" 134 : "=r"(result) 135 : "r"(ra), "r"(rb) 136 ); 137 return (result); 138 139 } 140 141 #else /* C EQUIVALENT */ 142 143 144 static inline Word32 L_add(register Word32 L_var1, register Word32 L_var2, Flag *pOverflow) 145 { 146 Word32 L_sum; 147 148 L_sum = L_var1 + L_var2; 149 150 if ((L_var1 ^ L_var2) >= 0) 151 { 152 if ((L_sum ^ L_var1) < 0) 153 { 154 L_sum = (L_var1 < 0) ? MIN_32 : MAX_32; 155 *pOverflow = 1; 156 } 157 } 158 159 return (L_sum); 160 } 161 162 #endif 163 164 /*---------------------------------------------------------------------------- 165 ; END 166 ----------------------------------------------------------------------------*/ 167 #ifdef __cplusplus 168 } 169 #endif 170 171 #endif /* _L_ADD_H_ */ 172
