mirror of https://github.com/ARMmbed/mbed-os.git
33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
/*
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* Copyright (c) , Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBED_CMSIS_H
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#define MBED_CMSIS_H
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#include <stdint.h>
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static inline uint32_t __RBIT(uint32_t x)
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{
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x = ((x & 0xaaaaaaaa) >> 1) | ((x & 0x55555555) << 1);
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x = ((x & 0xcccccccc) >> 2) | ((x & 0x33333333) << 2);
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x = ((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4);
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x = ((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8);
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x = (x >> 16) | (x << 16);
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return x;
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}
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#endif
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