109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/* ------------------------------------------------------------------
|
|
* Copyright (C) 1998-2009 PacketVideo
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
|
* express or implied.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
* -------------------------------------------------------------------
|
|
*/
|
|
/*
|
|
------------------------------------------------------------------------------
|
|
PacketVideo Corp.
|
|
MP3 Decoder Library
|
|
|
|
Filename: pvmp3_normalize.h
|
|
|
|
Date: 10/02/2007
|
|
|
|
------------------------------------------------------------------------------
|
|
REVISION HISTORY
|
|
|
|
Description:
|
|
------------------------------------------------------------------------------
|
|
INCLUDE DESCRIPTION
|
|
|
|
------------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef PVMP3_NORMALIZE_H
|
|
#define PVMP3_NORMALIZE_H
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
; INCLUDES
|
|
----------------------------------------------------------------------------*/
|
|
|
|
#include "pvmp3_audio_type_defs.h"
|
|
|
|
/*----------------------------------------------------------------------------
|
|
; MACROS
|
|
; Define module specific macros here
|
|
----------------------------------------------------------------------------*/
|
|
|
|
/*----------------------------------------------------------------------------
|
|
; EXTERNAL VARIABLES REFERENCES
|
|
----------------------------------------------------------------------------*/
|
|
|
|
/*----------------------------------------------------------------------------
|
|
; DEFINES AND SIMPLE TYPEDEF'S
|
|
----------------------------------------------------------------------------*/
|
|
|
|
#if (defined(PV_ARM_V5)||defined(PV_ARM_V4))
|
|
|
|
__inline int32 pvmp3_normalize(int32 x)
|
|
{
|
|
int32 y;
|
|
__asm
|
|
{
|
|
clz y, x;
|
|
sub y, y, #1
|
|
}
|
|
return (y);
|
|
}
|
|
|
|
|
|
#elif (defined(PV_ARM_GCC_V5)||defined(PV_ARM_GCC_V4))
|
|
|
|
__inline int32 pvmp3_normalize(int32 x)
|
|
{
|
|
register int32 y;
|
|
register int32 ra = x;
|
|
|
|
|
|
asm volatile(
|
|
"clz %0, %1\n\t"
|
|
"sub %0, %0, #1"
|
|
: "=&r*i"(y)
|
|
: "r"(ra));
|
|
return (y);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
int32 pvmp3_normalize(int32 x);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#endif /* PV_NORMALIZE_H */
|