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/*
* Copyright (C) 2004-2010 NXP Software
* Copyright (C) 2010 The Android Open Source Project
*
* 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.
*/
#include "LVM_Types.h"
#include "LVM_Macros.h"
#include "ScalarArithmetic.h"
#include "Filter.h"
/*-------------------------------------------------------------------------*/
/* FUNCTION: */
/* LVM_Power10 */
/* */
/* DESCRIPTION: */
/* This function calculates 10X using an 11th order polynomial. It uses */
/* the following table of 32-bit integer polynomial coefficients: */
/* */
/* Coefficient Value */
/* A0 67102543 */
/* A1 309032995 */
/* A2 712096127 */
/* A3 1092797331 */
/* A4 1251625137 */
/* A5 1154649460 */
/* A6 915654800 */
/* A7 597883683 */
/* A8 284378230 */
/* A9 150262097 */
/* A10 124894471 */
/* A11 50477244 */
/* A12 -2 */
/* */
/* Y = (A0 + A1*X + A2*X2 + A3*X3 + ….. + AN*xN) << AN+1 */
/* */
/* */
/* PARAMETERS: */
/* */
/* X is the input variable in Q2.30 format */
/* */
/* RETURNS: */
/* The result of the 10x expansion in Q8.24 format */
/*-------------------------------------------------------------------------*/
LVM_INT32 LVM_Power10(LVM_INT32 X)
{
LVM_INT32 Y,Coefficients[13]={ 16775636,
77258249,
178024032,
273199333,
312906284,
288662365,
228913700,
149470921,
71094558,
37565524,
31223618,
12619311,
0};
Y=LVM_Polynomial((LVM_UINT16)11,
Coefficients,
X);
return Y;
}
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