144 lines
3.3 KiB
C++
144 lines
3.3 KiB
C++
/* Operation with 128 bit bitmask.
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Copyright (C) 2013-2023 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_WIDE_INT_BITMASK_H
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#define GCC_WIDE_INT_BITMASK_H
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class wide_int_bitmask
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{
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public:
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constexpr wide_int_bitmask ();
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constexpr wide_int_bitmask (uint64_t l);
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constexpr wide_int_bitmask (uint64_t l, uint64_t h);
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inline wide_int_bitmask &operator &= (wide_int_bitmask);
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inline wide_int_bitmask &operator |= (wide_int_bitmask);
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constexpr wide_int_bitmask operator ~ () const;
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constexpr wide_int_bitmask operator & (wide_int_bitmask) const;
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constexpr wide_int_bitmask operator | (wide_int_bitmask) const;
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inline wide_int_bitmask operator >> (int);
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inline wide_int_bitmask operator << (int);
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inline bool operator == (wide_int_bitmask) const;
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inline bool operator != (wide_int_bitmask) const;
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uint64_t low, high;
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};
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constexpr
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wide_int_bitmask::wide_int_bitmask ()
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: low (0), high (0)
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{
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}
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constexpr
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wide_int_bitmask::wide_int_bitmask (uint64_t l)
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: low (l), high (0)
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{
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}
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constexpr
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wide_int_bitmask::wide_int_bitmask (uint64_t l, uint64_t h)
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: low (l), high (h)
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{
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}
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inline wide_int_bitmask &
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wide_int_bitmask::operator &= (wide_int_bitmask b)
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{
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low &= b.low;
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high &= b.high;
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return *this;
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}
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inline wide_int_bitmask &
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wide_int_bitmask::operator |= (wide_int_bitmask b)
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{
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low |= b.low;
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high |= b.high;
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return *this;
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}
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constexpr wide_int_bitmask
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wide_int_bitmask::operator ~ () const
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{
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return wide_int_bitmask (~low, ~high);
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}
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constexpr wide_int_bitmask
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wide_int_bitmask::operator | (wide_int_bitmask b) const
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{
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return wide_int_bitmask (low | b.low, high | b.high);
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}
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constexpr wide_int_bitmask
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wide_int_bitmask::operator & (wide_int_bitmask b) const
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{
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return wide_int_bitmask (low & b.low, high & b.high);
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}
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inline wide_int_bitmask
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wide_int_bitmask::operator << (int amount)
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{
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wide_int_bitmask ret;
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if (amount >= 64)
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{
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ret.low = 0;
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ret.high = low << (amount - 64);
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}
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else if (amount == 0)
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ret = *this;
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else
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{
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ret.low = low << amount;
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ret.high = (low >> (64 - amount)) | (high << amount);
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}
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return ret;
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}
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inline wide_int_bitmask
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wide_int_bitmask::operator >> (int amount)
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{
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wide_int_bitmask ret;
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if (amount >= 64)
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{
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ret.low = high >> (amount - 64);
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ret.high = 0;
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}
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else if (amount == 0)
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ret = *this;
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else
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{
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ret.low = (high << (64 - amount)) | (low >> amount);
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ret.high = high >> amount;
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}
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return ret;
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}
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inline bool
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wide_int_bitmask::operator == (wide_int_bitmask b) const
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{
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return low == b.low && high == b.high;
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}
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inline bool
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wide_int_bitmask::operator != (wide_int_bitmask b) const
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{
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return low != b.low || high != b.high;
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}
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#endif /* ! GCC_WIDE_INT_BITMASK_H */
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