14f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* ------------------------------------------------------------------ 24f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Copyright (C) 1998-2009 PacketVideo 34f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 44f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 54f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * you may not use this file except in compliance with the License. 64f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * You may obtain a copy of the License at 74f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 84f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 94f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Unless required by applicable law or agreed to in writing, software 114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * express or implied. 144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * See the License for the specific language governing permissions 154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * and limitations under the License. 164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ------------------------------------------------------------------- 174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/**************************************************************************************** 194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPortions of this file are derived from the following 3GPP standard: 204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3GPP TS 26.173 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPermission to distribute, modify and use this file under the standard license 274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberterms listed above has been obtained from the copyright holder. 284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber****************************************************************************************/ 294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Pathname: ./src/pvamrwbdecoder_basic_op_cequivalent.h 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 05/07/2007 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INCLUDE DESCRIPTION 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifndef PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "normalize_amr_wb.h" 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#if defined(C_EQUIVALENT) 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : add_int16 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Performs the addition (var1+var2) with overflow control and saturation; 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the 16 bit result is set at +32767 when overflow occurs or at -32768 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber when underflow occurs. 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs : 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber none 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int16 add_int16(int16 var1, int16 var2) 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_sum; 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = (int32) var1 + var2; 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_sum >> 15) != (L_sum >> 31)) 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = (L_sum >> 31) ^ MAX_16; 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return ((int16)(L_sum)); 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : sub_int16 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Performs the subtraction (var1+var2) with overflow control and satu- 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ration; the 16 bit result is set at +32767 when overflow occurs or at 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -32768 when underflow occurs. 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs : 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber none 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int16 sub_int16(int16 var1, int16 var2) 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_diff; 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_diff = (int32) var1 - var2; 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_diff >> 15) != (L_diff >> 31)) 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_diff = (L_diff >> 31) ^ MAX_16; 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return ((int16)(L_diff)); 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : mult_int16 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Performs the multiplication of var1 by var2 and gives a 16 bit result 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber which is scaled i.e.: 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mult_int16(var1,var2) = extract_l(L_shr((var1 times var2),15)) and 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mult_int16(-32768,-32768) = 32767. 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int16 mult_int16(int16 var1, int16 var2) 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_product; 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_product = ((int32) var1 * (int32) var2) >> 15; 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_product >> 15) != (L_product >> 31)) 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_product = (L_product >> 31) ^ MAX_16; 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return ((int16)L_product); 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : add_int32 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bits addition of the two 32 bits variables (L_var1+L_var2) with 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber overflow control and saturation; the result is set at +2147483647 when 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber overflow occurs or at -2147483648 when underflow occurs. 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var1 32 bit long signed integer (int32) whose value falls in the 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var2 32 bit long signed integer (int32) whose value falls in the 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32) whose value falls in the 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 add_int32(int32 L_var1, int32 L_var2) 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_var_out; 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = L_var1 + L_var2; 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((L_var1 ^ L_var2) & MIN_32) == 0) /* same sign ? */ 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_var_out ^ L_var1) & MIN_32) /* addition matches sign ? */ 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = (L_var1 >> 31) ^ MAX_32; 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (L_var_out); 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : sub_int32 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bits subtraction of the two 32 bits variables (L_var1-L_var2) with 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber overflow control and saturation; the result is set at +2147483647 when 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber overflow occurs or at -2147483648 when underflow occurs. 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var1 32 bit long signed integer (int32) whose value falls in the 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var2 32 bit long signed integer (int32) whose value falls in the 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32) whose value falls in the 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 sub_int32(int32 L_var1, int32 L_var2) 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_var_out; 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = L_var1 - L_var2; 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((L_var1 ^ L_var2) & MIN_32) != 0) /* different sign ? */ 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_var_out ^ L_var1) & MIN_32) /* difference matches sign ? */ 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = (L_var1 >> 31) ^ MAX_32; 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (L_var_out); 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : mac_16by16_to_int32 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Multiply var1 by var2 and shift the result left by 1. Add the 32 bit 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber result to L_var3 with saturation, return a 32 bit result: 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var3 32 bit long signed integer (int32) whose value falls in the 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32) whose value falls in the 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 mac_16by16_to_int32(int32 L_var3, int16 var1, int16 var2) 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_var_out; 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_mul; 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = ((int32) var1 * (int32) var2); 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (L_mul != 0x40000000) 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul <<= 1; 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = MAX_32; /* saturation */ 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = L_var3 + L_mul; 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((L_mul ^ L_var3) & MIN_32) == 0) /* same sign ? */ 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_var_out ^ L_var3) & MIN_32) /* addition matches sign ? */ 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = (L_var3 >> 31) ^ MAX_32; 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (L_var_out); 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : msu_16by16_from_int32 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Multiply var1 by var2 and shift the result left by 1. Subtract the 32 bit 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber result to L_var3 with saturation, return a 32 bit result: 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var3 32 bit long signed integer (int32) whose value falls in the 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32) whose value falls in the 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 msu_16by16_from_int32(int32 L_var3, int16 var1, int16 var2) 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_var_out; 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_mul; 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = ((int32) var1 * (int32) var2); 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (L_mul != 0x40000000) 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul <<= 1; 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = MAX_32; /* saturation */ 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = L_var3 - L_mul; 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((L_mul ^ L_var3) & MIN_32) != 0) /* different sign ? */ 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_var_out ^ L_var3) & MIN_32) /* difference matches sign ? */ 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var_out = (L_var3 >> 31) ^ MAX_32; 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (L_var_out); 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : mul_16by16_to_int32 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mul_16by16_to_int32 is the 32 bit result of the multiplication of var1 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber times var2 with one shift left i.e.: 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mult(var1,var2) = L_shl((var1 times var2),1) and 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mult(-32768,-32768) = 2147483647. 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var1 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var2 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var1 <= 0x0000 7fff. 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 4044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32) whose value falls in the 4054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 4064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 4084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 mul_16by16_to_int32(int16 var1, int16 var2) 4114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_mul; 4134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = ((int32) var1 * (int32) var2); 4154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (L_mul != 0x40000000) 4174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul <<= 1; 4194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 4214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mul = MAX_32; /* saturation */ 4234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (L_mul); 4264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 4304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : amr_wb_round 4324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Round the lower 16 bits of the 32 bit input number into the MS 16 bits 4344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber with saturation. Shift the resulting bits right by 16 and return the 16 4354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bit number: 4364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber round(L_var1) = extract_h(L_add(L_var1,32768)) 4374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 4394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var1 4404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32 ) whose value falls in the 4414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 4424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 4444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 4454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 4464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 4484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int16 amr_wb_round(int32 L_var1) 4494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (L_var1 != MAX_32) 4514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var1 += 0x00008000L; 4534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return ((int16)(L_var1 >> 16)); 4554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 4594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : amr_wb_shl1_round 4614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Shift the 32 bit input number to the left by 1, round up the result and 4634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift down by 16 4644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber amr_wb_shl1_round(L_var1) = round(L_shl(L_var1,1)) 4654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 4674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_var1 4684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 32 bit long signed integer (int32 ) whose value falls in the 4694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 4704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Return Value : 4724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 16 bit short signed integer (int16) whose value falls in the 4734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber range : 0xffff 8000 <= var_out <= 0x0000 7fff. 4744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 4764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int16 amr_wb_shl1_round(int32 L_var1) 4774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 var_out; 4794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((L_var1 << 1) >> 1 == L_var1) 4814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var_out = (int16)((L_var1 + 0x00004000) >> 15); 4834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 4854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber var_out = (int16)(((L_var1 >> 31) ^ MAX_32) >> 16); 4874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (var_out); 4904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 4934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function Name : mul_32by16 4944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Multiply a 16 bit integer by a 32 bit (DPF). The result is divided 4964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber by 2^15 4974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_32 = (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 4994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs : 5014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber hi hi part of 32 bit number. 5034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lo lo part of 32 bit number. 5044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber n 16 bit number. 5054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 5074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 mul_32by16(int16 hi, int16 lo, int16 n) 5104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (((((int32)hi*n)) + ((((int32)lo*n) >> 15))) << 1); 5124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 fxp_mac_16by16(int16 var1, int16 var2, int32 L_add) 5154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_add += (int32)var1 * var2; 5184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return L_add; 5204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 fxp_mul_16by16(int16 var1, const int16 var2) 5234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_mul = (int32)var1 * var2; 5254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return L_mul; 5274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber __inline int32 fxp_mul32_by_16b(int32 L_var1, const int32 L_var2) 5304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_mul = (int32)(((int64)L_var1 * (L_var2 << 16)) >> 32); 5334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return L_mul; 5354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 5394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 5404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 5414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 5434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif /* PVAMRWBDECODER_BASIC_OP_CEQUIVALENT_H */ 5454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 546