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c1081a114e
* Revise and simplify most enable_if statements in the project. * Update code style in all files. * Update copyright year. * Add a dedicated Memory.h header with the memory device implementation. * Update documentation. * CMake cleanup.
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//! Bit mask implementation.
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/**
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* @file Mask.h
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* @author Nicolas Clauvelin (nclauvelin@sendyne.com)
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* @copyright Copyright 2010-2019 Sendyne Corp. All rights reserved.
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*
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* The implementation is designed to compute masks prior to runtime by
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* relying on constexpr function. This will work as intended if the function
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* argument is known at compile time, otherwise it will be evaluated at runtime.
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*/
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#ifndef CPPREG_MASK_H
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#define CPPREG_MASK_H
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#include "cppreg_Defines.h"
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namespace cppreg {
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//! Mask constexpr function.
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/**
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* @tparam Mask Mask data type (will be derived from register).
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* @param width Mask width.
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* @return The mask value.
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*/
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template <typename Mask>
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constexpr Mask make_mask(const FieldWidth width) noexcept {
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return width == 0 ? static_cast<Mask>(0u)
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: static_cast<Mask>(
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(make_mask<Mask>(FieldWidth(width - 1)) << 1) | 1);
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}
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//! Shifted mask constexpr function.
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/**
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* @tparam Mask Mask data type (will be derived from register).
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* @param width Mask width.
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* @param offset Mask offset.
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* @return The mask value.
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*/
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template <typename Mask>
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constexpr Mask make_shifted_mask(const FieldWidth width,
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const FieldOffset offset) noexcept {
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return static_cast<Mask>(make_mask<Mask>(width) << offset);
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}
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} // namespace cppreg
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#endif // CPPREG_MASK_H
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