1a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber/* ------------------------------------------------------------------ 2a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * Copyright (C) 1998-2009 PacketVideo 3a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * 4a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * you may not use this file except in compliance with the License. 6a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * You may obtain a copy of the License at 7a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * 8a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * 10a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * Unless required by applicable law or agreed to in writing, software 11a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * express or implied. 14a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * See the License for the specific language governing permissions 15a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * and limitations under the License. 16a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber * ------------------------------------------------------------------- 17a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber */ 18a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber/**************************************************************************************** 19a30d40083856cb4edd225faf8b488fab156e5976Andreas HuberPortions of this file are derived from the following 3GPP standard: 20a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 21a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 3GPP TS 26.173 22a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 23a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Available from http://www.3gpp.org 24a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 25a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26a30d40083856cb4edd225faf8b488fab156e5976Andreas HuberPermission to distribute, modify and use this file under the standard license 27a30d40083856cb4edd225faf8b488fab156e5976Andreas Huberterms listed above has been obtained from the copyright holder. 28a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber****************************************************************************************/ 29a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber/* 30a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 31a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 33a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 34a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Pathname: ./src/pvamrwbdecoder_basic_op_cequivalent.h 35a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 36a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Date: 05/07/2007 37a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 38a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 39a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber REVISION HISTORY 40a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 41a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: 42a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 43a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber INCLUDE DESCRIPTION 44a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 45a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 46a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber*/ 47a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifndef PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H 48a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#define PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H 49a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 50a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifdef __cplusplus 51a30d40083856cb4edd225faf8b488fab156e5976Andreas Huberextern "C" 52a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber{ 53a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 54a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 55a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 56a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#include "normalize_amr_wb.h" 57a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 58a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#if defined(C_EQUIVALENT) 59a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 60a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 61a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 62a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 63a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : add_int16 64a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 65a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Purpose : 66a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 67a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Performs the addition (var1+var2) with overflow control and saturation; 68a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber the 16 bit result is set at +32767 when overflow occurs or at -32768 69a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber when underflow occurs. 70a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 71a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 72a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 73a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 74a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 75a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 76a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 77a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 78a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 79a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 80a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Outputs : 81a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber none 82a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 83a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 84a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 85a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 86a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 87a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 88a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int16 add_int16(int16 var1, int16 var2) 89a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 90a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_sum; 91a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 92a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_sum = (int32) var1 + var2; 93a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_sum >> 15) != (L_sum >> 31)) 94a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 95a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_sum = (L_sum >> 31) ^ MAX_16; 96a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 97a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((int16)(L_sum)); 98a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 99a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 100a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 101a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 102a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 103a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : sub_int16 104a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 105a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Performs the subtraction (var1+var2) with overflow control and satu- 106a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ration; the 16 bit result is set at +32767 when overflow occurs or at 107a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber -32768 when underflow occurs. 108a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 109a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 110a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 111a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 112a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 113a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 114a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 115a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 116a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 117a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 118a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 119a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Outputs : 120a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber none 121a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 122a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 123a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 124a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 125a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 126a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 127a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int16 sub_int16(int16 var1, int16 var2) 128a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 129a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_diff; 130a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 131a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_diff = (int32) var1 - var2; 132a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_diff >> 15) != (L_diff >> 31)) 133a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 134a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_diff = (L_diff >> 31) ^ MAX_16; 135a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 136a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((int16)(L_diff)); 137a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 138a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 139a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 140a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 141a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 142a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : mult_int16 143a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 144a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Performs the multiplication of var1 by var2 and gives a 16 bit result 145a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber which is scaled i.e.: 146a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber mult_int16(var1,var2) = extract_l(L_shr((var1 times var2),15)) and 147a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber mult_int16(-32768,-32768) = 32767. 148a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 149a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 150a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 151a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 152a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 153a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 154a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 155a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 156a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 157a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 158a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 159a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 160a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 161a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 162a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 163a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 164a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 165a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int16 mult_int16(int16 var1, int16 var2) 166a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 167a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_product; 168a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 169a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_product = ((int32) var1 * (int32) var2) >> 15; 170a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 171a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_product >> 15) != (L_product >> 31)) 172a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 173a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_product = (L_product >> 31) ^ MAX_16; 174a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 175a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 176a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((int16)L_product); 177a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 178a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 179a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 180a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 181a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 182a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : add_int32 183a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 184a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bits addition of the two 32 bits variables (L_var1+L_var2) with 185a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber overflow control and saturation; the result is set at +2147483647 when 186a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber overflow occurs or at -2147483648 when underflow occurs. 187a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 188a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 189a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 190a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var1 32 bit long signed integer (int32) whose value falls in the 191a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 192a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 193a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var2 32 bit long signed integer (int32) whose value falls in the 194a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 195a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 196a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 197a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 198a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out 199a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32) whose value falls in the 200a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 201a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 202a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 203a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 204a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 205a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 add_int32(int32 L_var1, int32 L_var2) 206a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 207a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_var_out; 208a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 209a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = L_var1 + L_var2; 210a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 211a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (((L_var1 ^ L_var2) & MIN_32) == 0) /* same sign ? */ 212a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 213a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_var_out ^ L_var1) & MIN_32) /* addition matches sign ? */ 214a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 215a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = (L_var1 >> 31) ^ MAX_32; 216a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 217a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 218a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (L_var_out); 219a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 220a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 221a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 222a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 223a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 224a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 225a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 226a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : sub_int32 227a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 228a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bits subtraction of the two 32 bits variables (L_var1-L_var2) with 229a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber overflow control and saturation; the result is set at +2147483647 when 230a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber overflow occurs or at -2147483648 when underflow occurs. 231a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 232a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 233a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 234a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var1 32 bit long signed integer (int32) whose value falls in the 235a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 236a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 237a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var2 32 bit long signed integer (int32) whose value falls in the 238a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 239a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 240a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 241a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 242a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out 243a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32) whose value falls in the 244a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 245a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 246a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 247a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 248a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 249a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 sub_int32(int32 L_var1, int32 L_var2) 250a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 251a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_var_out; 252a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 253a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = L_var1 - L_var2; 254a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 255a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (((L_var1 ^ L_var2) & MIN_32) != 0) /* different sign ? */ 256a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 257a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_var_out ^ L_var1) & MIN_32) /* difference matches sign ? */ 258a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 259a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = (L_var1 >> 31) ^ MAX_32; 260a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 261a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 262a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (L_var_out); 263a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 264a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 265a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 266a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 267a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 268a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 269a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : mac_16by16_to_int32 270a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 271a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Multiply var1 by var2 and shift the result left by 1. Add the 32 bit 272a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber result to L_var3 with saturation, return a 32 bit result: 273a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). 274a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 275a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 276a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 277a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var3 32 bit long signed integer (int32) whose value falls in the 278a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 279a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 280a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 281a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 282a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 283a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 284a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 285a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 286a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 287a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 288a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 289a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 290a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32) whose value falls in the 291a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 292a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 293a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 294a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 295a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 296a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 mac_16by16_to_int32(int32 L_var3, int16 var1, int16 var2) 297a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 298a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_var_out; 299a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_mul; 300a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 301a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = ((int32) var1 * (int32) var2); 302a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 303a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (L_mul != 0x40000000) 304a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 305a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul <<= 1; 306a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 307a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber else 308a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 309a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = MAX_32; /* saturation */ 310a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 311a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 312a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = L_var3 + L_mul; 313a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 314a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (((L_mul ^ L_var3) & MIN_32) == 0) /* same sign ? */ 315a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 316a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_var_out ^ L_var3) & MIN_32) /* addition matches sign ? */ 317a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 318a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = (L_var3 >> 31) ^ MAX_32; 319a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 320a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 321a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 322a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (L_var_out); 323a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 324a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 325a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 326a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 327a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 328a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 329a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : msu_16by16_from_int32 330a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 331a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Multiply var1 by var2 and shift the result left by 1. Subtract the 32 bit 332a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber result to L_var3 with saturation, return a 32 bit result: 333a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). 334a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 335a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 336a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 337a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var3 32 bit long signed integer (int32) whose value falls in the 338a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 339a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 340a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 341a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 342a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 343a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 344a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 345a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 346a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 347a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 348a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 349a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 350a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32) whose value falls in the 351a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 352a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 353a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 354a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 355a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 msu_16by16_from_int32(int32 L_var3, int16 var1, int16 var2) 356a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 357a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_var_out; 358a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_mul; 359a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 360a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = ((int32) var1 * (int32) var2); 361a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 362a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (L_mul != 0x40000000) 363a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 364a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul <<= 1; 365a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 366a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber else 367a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 368a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = MAX_32; /* saturation */ 369a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 370a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 371a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = L_var3 - L_mul; 372a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 373a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (((L_mul ^ L_var3) & MIN_32) != 0) /* different sign ? */ 374a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 375a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_var_out ^ L_var3) & MIN_32) /* difference matches sign ? */ 376a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 377a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var_out = (L_var3 >> 31) ^ MAX_32; 378a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 379a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 380a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 381a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (L_var_out); 382a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 383a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 384a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 385a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 386a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 387a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : mul_16by16_to_int32 388a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 389a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber mul_16by16_to_int32 is the 32 bit result of the multiplication of var1 390a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber times var2 with one shift left i.e.: 391a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mult(var1,var2) = L_shl((var1 times var2),1) and 392a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mult(-32768,-32768) = 2147483647. 393a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 394a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 395a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var1 396a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 397a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 398a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 399a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var2 400a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 401a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 402a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 403a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 404a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32) whose value falls in the 405a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 406a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 407a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 408a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 409a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 410a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 mul_16by16_to_int32(int16 var1, int16 var2) 411a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 412a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_mul; 413a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 414a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = ((int32) var1 * (int32) var2); 415a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 416a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (L_mul != 0x40000000) 417a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 418a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul <<= 1; 419a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 420a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber else 421a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 422a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_mul = MAX_32; /* saturation */ 423a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 424a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 425a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (L_mul); 426a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 427a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 428a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 429a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 430a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 431a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : amr_wb_round 432a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 433a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Round the lower 16 bits of the 32 bit input number into the MS 16 bits 434a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber with saturation. Shift the resulting bits right by 16 and return the 16 435a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber bit number: 436a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber round(L_var1) = extract_h(L_add(L_var1,32768)) 437a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 438a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 439a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var1 440a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32 ) whose value falls in the 441a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 442a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 443a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 444a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 445a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 446a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 447a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 448a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int16 amr_wb_round(int32 L_var1) 449a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 450a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (L_var1 != MAX_32) 451a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 452a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var1 += 0x00008000L; 453a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 454a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((int16)(L_var1 >> 16)); 455a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 456a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 457a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 458a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 459a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 460a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : amr_wb_shl1_round 461a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 462a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Shift the 32 bit input number to the left by 1, round up the result and 463a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber shift down by 16 464a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber amr_wb_shl1_round(L_var1) = round(L_shl(L_var1,1)) 465a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 466a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 467a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_var1 468a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 32 bit long signed integer (int32 ) whose value falls in the 469a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 470a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 471a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Return Value : 472a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 16 bit short signed integer (int16) whose value falls in the 473a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 474a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 475a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 476a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int16 amr_wb_shl1_round(int32 L_var1) 477a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 478a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int16 var_out; 479a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 480a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if ((L_var1 << 1) >> 1 == L_var1) 481a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 482a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var_out = (int16)((L_var1 + 0x00004000) >> 15); 483a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 484a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber else 485a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 486a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber var_out = (int16)(((L_var1 >> 31) ^ MAX_32) >> 16); 487a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 488a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 489a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (var_out); 490a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 491a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 492a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 493a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Function Name : mul_32by16 494a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 495a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Multiply a 16 bit integer by a 32 bit (DPF). The result is divided 496a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber by 2^15 497a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 498a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_32 = (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 499a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 500a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Inputs : 501a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 502a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber hi hi part of 32 bit number. 503a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber lo lo part of 32 bit number. 504a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber n 16 bit number. 505a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 506a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 507a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 508a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 509a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 mul_32by16(int16 hi, int16 lo, int16 n) 510a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 511a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return (((((int32)hi*n)) + ((((int32)lo*n) >> 15))) << 1); 512a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 513a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 514a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 fxp_mac_16by16(int16 var1, int16 var2, int32 L_add) 515a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 516a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 517a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber L_add += (int32)var1 * var2; 518a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 519a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return L_add; 520a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 521a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 522a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 fxp_mul_16by16(int16 var1, const int16 var2) 523a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 524a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_mul = (int32)var1 * var2; 525a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 526a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return L_mul; 527a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 528a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 529a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline int32 fxp_mul32_by_16b(int32 L_var1, const int32 L_var2) 530a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 531a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 532a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber int32 L_mul = (int32)(((int64)L_var1 * (L_var2 << 16)) >> 32); 533a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 534a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return L_mul; 535a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 536a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 537a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 538a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifdef __cplusplus 539a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber} 540a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 541a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 542a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 543a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 544a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif /* PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H */ 545a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 546