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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** 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.
*/
/********************************************************************************
*
* File : log2.h
* Purpose : Computes log2(L_x)
*
********************************************************************************
*/
#ifndef __LOG2_H__
#define __LOG2_H__
/*
********************************************************************************
* INCLUDE FILES
********************************************************************************
*/
#include "typedef.h"
/*
********************************************************************************
* DEFINITION OF DATA TYPES
********************************************************************************
*/
/*
********************************************************************************
* DECLARATION OF PROTOTYPES
********************************************************************************
*/
void Log2 (
Word32 L_x, /* (i) : input value */
Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */
Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1)*/
);
void Log2_norm (
Word32 L_x, /* (i) : input value (normalized) */
Word16 exp, /* (i) : norm_l (L_x) */
Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */
Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */
);
#endif //__LOG2_H__
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