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 26.073 22a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Available from http://www.3gpp.org 24a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 25a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber(C) 2004, 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 Filename: /audio/gsm_amr/c/include/mult.h 32a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 33a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 34a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber REVISION HISTORY 35a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 36a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: Created separate header file for mult function. 37a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 38a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: Changed prototype of the mult() function. Instead of using global 39a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber a pointer to overflow flag is now passed into the function. 40a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 41a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: Updated copyright information. 42a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Updated variable name from "overflow" to "pOverflow" to match 43a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber with original function declaration. 44a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 45a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: Moved _cplusplus #ifdef after Include section. 46a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 47a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: Providing support for ARM and Linux-ARM assembly instructions. 48a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 49a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Who: Date: 50a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Description: 51a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 52a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 53a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber INCLUDE DESCRIPTION 54a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 55a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber This file contains all the constant definitions and prototype definitions 56a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber needed by the mult function. 57a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 58a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber------------------------------------------------------------------------------ 59a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber*/ 60a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 61a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifndef MULT_H 62a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#define MULT_H 63a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 64a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber/*---------------------------------------------------------------------------- 65a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber; INCLUDES 66a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber----------------------------------------------------------------------------*/ 67a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 68a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#include "basicop_malloc.h" 69a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 70a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber/*--------------------------------------------------------------------------*/ 71a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifdef __cplusplus 72a30d40083856cb4edd225faf8b488fab156e5976Andreas Huberextern "C" 73a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber{ 74a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 75a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 76a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 77a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; MACROS 78a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; Define module specific macros here 79a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 80a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 81a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 82a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; DEFINES 83a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; Include all pre-processor statements here. 84a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 85a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 86a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 87a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; EXTERNAL VARIABLES REFERENCES 88a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; Declare variables used in this module but defined elsewhere 89a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 90a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 91a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 92a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; SIMPLE TYPEDEF'S 93a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 94a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 95a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 96a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; ENUMERATED TYPEDEF'S 97a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 98a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 99a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 100a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; STRUCTURES TYPEDEF'S 101a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 102a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 103a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 104a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; GLOBAL FUNCTION DEFINITIONS 105a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; Function Prototype declaration 106a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 107a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#if defined(PV_ARM_V5) 108a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 109a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow) 110a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 111a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Word32 product; 112a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 113a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber OSCL_UNUSED_ARG(pOverflow); 114a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 115a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __asm 116a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 117a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber SMULBB product, var1, var2 118a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber MOV product, product, ASR #15 119a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber CMP product, 0x7FFF 120a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber MOVGE product, 0x7FFF 121a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 122a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 123a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((Word16) product); 124a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 125a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 126a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#elif defined(PV_ARM_GCC_V5) 127a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 128a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber __inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow) 129a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 130a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber register Word32 ra = var1; 131a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber register Word32 rb = var2; 132a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Word32 product; 133a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber Word32 temp = 0x7FFF; 134a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 135a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber OSCL_UNUSED_ARG(pOverflow); 136a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 137a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber asm volatile("smulbb %0, %1, %2" 138a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "=r"(product) 139a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "r"(ra), "r"(rb) 140a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ); 141a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber asm volatile("mov %0, %1, ASR #15" 142a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "=r"(product) 143a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "r"(product) 144a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ); 145a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber asm volatile("cmp %0, %1" 146a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "=r"(product) 147a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "r"(temp) 148a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ); 149a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber asm volatile("movge %0, %1" 150a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "=r"(product) 151a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber : "r"(temp) 152a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ); 153a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 154a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((Word16) product); 155a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 156a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 157a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#else /* C EQUIVALENT */ 158a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 159a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber static inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow) 160a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 161a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber register Word32 product; 162a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 163a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber product = ((Word32) var1 * var2) >> 15; 164a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 165a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /* Saturate result (if necessary). */ 166a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /* var1 * var2 >0x00007fff is the only case */ 167a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /* that saturation occurs. */ 168a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 169a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber if (product > 0x00007fffL) 170a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber { 171a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber *pOverflow = 1; 172a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber product = (Word32) MAX_16; 173a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 174a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 175a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 176a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /* Return the product as a 16 bit value by type casting Word32 to Word16 */ 177a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 178a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber return ((Word16) product); 179a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber } 180a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 181a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 182a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber /*---------------------------------------------------------------------------- 183a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ; END 184a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber ----------------------------------------------------------------------------*/ 185a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#ifdef __cplusplus 186a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber} 187a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif 188a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 189a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber#endif /* _MULT_H_ */ 190a30d40083856cb4edd225faf8b488fab156e5976Andreas Huber 191