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45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged
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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 JRT_BIT_FIELDS_H
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#define JRT_BIT_FIELDS_H
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/**
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* Extract a bit-field.
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*
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* @param type type of container
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* @param container container to extract bit-field from
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* @param lsb least significant bit of the value to be extracted
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* @param width width of the bit-field to be extracted
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* @return bit-field's value
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*/
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#define JRT_EXTRACT_BIT_FIELD(type, container, lsb, width) \
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(((container) >> lsb) & ((((type) 1) << (width)) - 1))
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/**
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* Set a bit-field.
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*
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* @param type type of container
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* @param container container to insert bit-field to
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* @param new_bit_field_value value of bit-field to insert
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* @param lsb least significant bit of the value to be inserted
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* @param width width of the bit-field to be inserted
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* @return bit-field's value
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*/
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#define JRT_SET_BIT_FIELD_VALUE(type, container, new_bit_field_value, lsb, width) \
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(((container) & ~(((((type) 1) << (width)) - 1) << (lsb))) | (((type) new_bit_field_value) << (lsb)))
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#endif /* !JRT_BIT_FIELDS_H */
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