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/* ------------------------------------------------------------------
* 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.
* -------------------------------------------------------------------
*/
/*
Pathname: pv_normalize.h
------------------------------------------------------------------------------
REVISION HISTORY
Who: Date:
Description:
------------------------------------------------------------------------------
INCLUDE DESCRIPTION
------------------------------------------------------------------------------
*/
#ifndef PV_NORMALIZE_H
#define PV_NORMALIZE_H
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pv_audio_type_defs.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL VARIABLES REFERENCES
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES AND SIMPLE TYPEDEF'S
----------------------------------------------------------------------------*/
#if defined(_ARM)
__inline Int pv_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 Int pv_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
Int pv_normalize(Int32 x);
#ifdef __cplusplus
}
#endif
#endif
#endif /* PV_NORMALIZE_H */
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