172 lines
5.8 KiB
C
172 lines
5.8 KiB
C
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/* ------------------------------------------------------------------
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* Copyright (C) 1998-2009 PacketVideo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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* -------------------------------------------------------------------
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*/
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/****************************************************************************************
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Portions of this file are derived from the following 3GPP standard:
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3GPP TS 26.073
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ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
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Available from http://www.3gpp.org
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(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
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Permission to distribute, modify and use this file under the standard license
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terms listed above has been obtained from the copyright holder.
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****************************************************************************************/
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/*
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Filename: /audio/gsm_amr/c/include/l_msu.h
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------------------------------------------------------------------------------
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REVISION HISTORY
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Description: Created separate header file for L_msu function.
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Description: Updated function prototype declaration to reflect new interface.
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A pointer to overflow flag is passed into the function. Updated
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template.
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Description: Moved _cplusplus #ifdef after Include section.
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Description: Providing support for ARM and Linux-ARM assembly instructions.
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Who: Date:
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Description:
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------------------------------------------------------------------------------
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INCLUDE DESCRIPTION
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This file contains all the constant definitions and prototype definitions
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needed by the L_msu function.
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------------------------------------------------------------------------------
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*/
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/*----------------------------------------------------------------------------
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; CONTINUE ONLY IF NOT ALREADY DEFINED
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----------------------------------------------------------------------------*/
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#ifndef L_MSU_H
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#define L_MSU_H
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/*----------------------------------------------------------------------------
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; INCLUDES
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----------------------------------------------------------------------------*/
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#include "basicop_malloc.h"
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#include "l_mult.h"
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#include "l_sub.h"
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/*--------------------------------------------------------------------------*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*----------------------------------------------------------------------------
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; MACROS
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; Define module specific macros here
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; DEFINES
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; Include all pre-processor statements here.
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; EXTERNAL VARIABLES REFERENCES
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; Declare variables used in this module but defined elsewhere
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; SIMPLE TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; ENUMERATED TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; STRUCTURES TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; GLOBAL FUNCTION DEFINITIONS
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; Function Prototype declaration
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----------------------------------------------------------------------------*/
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#if defined(PV_ARM_V5) /* Instructions for ARM Assembly on ADS*/
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__inline Word32 L_msu(Word32 L_var3, Word16 var1, Word16 var2, Flag *pOverflow)
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{
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Word32 product;
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Word32 result;
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OSCL_UNUSED_ARG(pOverflow);
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__asm
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{
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SMULBB product, var1, var2
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QDSUB result, L_var3, product
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}
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return (result);
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}
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#elif defined(PV_ARM_GCC_V5) /* Instructions for ARM-linux cross-compiler*/
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__inline Word32 L_msu(Word32 L_var3, Word16 var1, Word16 var2, Flag *pOverflow)
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{
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register Word32 ra = L_var3;
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register Word32 rb = var1;
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register Word32 rc = var2;
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Word32 product;
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Word32 result;
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OSCL_UNUSED_ARG(pOverflow);
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asm volatile("smulbb %0, %1, %2"
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: "=r"(product)
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: "r"(rb), "r"(rc)
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);
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asm volatile("qdsub %0, %1, %2"
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: "=r"(result)
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: "r"(ra), "r"(product)
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);
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return (result);
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}
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#else /* C EQUIVALENT */
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static inline Word32 L_msu(Word32 L_var3, Word16 var1, Word16 var2, Flag *pOverflow)
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{
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Word32 result;
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result = L_mult(var1, var2, pOverflow);
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result = L_sub(L_var3, result, pOverflow);
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return (result);
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}
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#endif
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/*----------------------------------------------------------------------------
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; END
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----------------------------------------------------------------------------*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _L_MSU_H_ */
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