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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* 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 "mthdecls.h"
int
__mth_i_ipowi(int x, int i)
{
int f;
/* special cases */
if (x == 2) {
if (i >= 0)
return 1 << i;
return 0;
}
if (i < 0) {
if (x == 1)
return 1;
if (x == -1) {
if (i & 1)
return -1;
return 1;
}
return 0;
}
if (i == 0)
return 1;
f = 1;
while (1) {
if (i & 1)
f *= x;
i >>= 1;
if (i == 0)
return f;
x *= x;
}
}
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