/*
|
* Copyright (C) 2003 - 2016 Sony Corporation
|
*
|
* 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 "ldac.h"
|
|
|
/*******************************************************************************
|
Subfunction: Check Saturation
|
*******************************************************************************/
|
__inline static INT32 check_sature_ldac(
|
INT64 val)
|
{
|
|
return (INT32)val;
|
}
|
|
/*******************************************************************************
|
Shift and Round
|
*******************************************************************************/
|
DECLFUNC INT32 sftrnd_ldac(
|
INT32 in,
|
int shift)
|
{
|
INT64 out;
|
|
if (shift > 0) {
|
out = ((INT64)in + ((INT64)1 << (shift-1))) >> shift;
|
}
|
else {
|
out = (INT64)in << (-shift);
|
}
|
|
return check_sature_ldac(out);
|
}
|
|
|
/*******************************************************************************
|
Get Bit Length of Value
|
*******************************************************************************/
|
DECLFUNC int get_bit_length_ldac(
|
INT32 val)
|
{
|
int len;
|
|
len = 0;
|
while (val > 0) {
|
val >>= 1;
|
len++;
|
}
|
|
return len;
|
}
|
|
/*******************************************************************************
|
Get Maximum Absolute Value
|
*******************************************************************************/
|
DECLFUNC INT32 get_absmax_ldac(
|
INT32 *p_x,
|
int num)
|
{
|
int i;
|
INT32 abmax, val;
|
|
abmax = abs(p_x[0]);
|
for (i = 1; i < num; i++) {
|
val = abs(p_x[i]);
|
if (abmax < val) {
|
abmax = val;
|
}
|
}
|
|
return abmax;
|
}
|
