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131
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1 /* Operation with 128 bit bitmask.
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2 Copyright (C) 2013-2018 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #ifndef GCC_WIDE_INT_BITMASK_H
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21 #define GCC_WIDE_INT_BITMASK_H
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22
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23 struct wide_int_bitmask
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24 {
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25 inline wide_int_bitmask ();
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26 inline wide_int_bitmask (uint64_t l);
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27 inline wide_int_bitmask (uint64_t l, uint64_t h);
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28 inline wide_int_bitmask &operator &= (wide_int_bitmask);
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29 inline wide_int_bitmask &operator |= (wide_int_bitmask);
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30 inline wide_int_bitmask operator ~ () const;
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31 inline wide_int_bitmask operator & (wide_int_bitmask) const;
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32 inline wide_int_bitmask operator | (wide_int_bitmask) const;
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33 inline wide_int_bitmask operator >> (int);
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34 inline wide_int_bitmask operator << (int);
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35 inline bool operator == (wide_int_bitmask) const;
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36 inline bool operator != (wide_int_bitmask) const;
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37 uint64_t low, high;
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38 };
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39
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40 inline
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41 wide_int_bitmask::wide_int_bitmask ()
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42 : low (0), high (0)
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43 {
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44 }
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45
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46 inline
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47 wide_int_bitmask::wide_int_bitmask (uint64_t l)
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48 : low (l), high (0)
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49 {
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50 }
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51
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52 inline
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53 wide_int_bitmask::wide_int_bitmask (uint64_t l, uint64_t h)
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54 : low (l), high (h)
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55 {
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56 }
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57
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58 inline wide_int_bitmask &
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59 wide_int_bitmask::operator &= (wide_int_bitmask b)
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60 {
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61 low &= b.low;
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62 high &= b.high;
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63 return *this;
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64 }
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65
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66 inline wide_int_bitmask &
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67 wide_int_bitmask::operator |= (wide_int_bitmask b)
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68 {
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69 low |= b.low;
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70 high |= b.high;
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71 return *this;
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72 }
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73
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74 inline wide_int_bitmask
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75 wide_int_bitmask::operator ~ () const
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76 {
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77 wide_int_bitmask ret (~low, ~high);
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78 return ret;
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79 }
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80
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81 inline wide_int_bitmask
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82 wide_int_bitmask::operator | (wide_int_bitmask b) const
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83 {
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84 wide_int_bitmask ret (low | b.low, high | b.high);
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85 return ret;
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86 }
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87
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88 inline wide_int_bitmask
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89 wide_int_bitmask::operator & (wide_int_bitmask b) const
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90 {
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91 wide_int_bitmask ret (low & b.low, high & b.high);
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92 return ret;
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93 }
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94
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95 inline wide_int_bitmask
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96 wide_int_bitmask::operator << (int amount)
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97 {
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98 wide_int_bitmask ret;
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99 if (amount >= 64)
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100 {
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101 ret.low = 0;
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102 ret.high = low << (amount - 64);
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103 }
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104 else if (amount == 0)
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105 ret = *this;
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106 else
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107 {
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108 ret.low = low << amount;
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109 ret.high = (low >> (64 - amount)) | (high << amount);
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110 }
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111 return ret;
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112 }
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113
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114 inline wide_int_bitmask
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115 wide_int_bitmask::operator >> (int amount)
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116 {
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117 wide_int_bitmask ret;
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118 if (amount >= 64)
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119 {
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120 ret.low = high >> (amount - 64);
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121 ret.high = 0;
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122 }
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123 else if (amount == 0)
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124 ret = *this;
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125 else
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126 {
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127 ret.low = (high << (64 - amount)) | (low >> amount);
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128 ret.high = high >> amount;
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129 }
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130 return ret;
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131 }
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132
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133 inline bool
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134 wide_int_bitmask::operator == (wide_int_bitmask b) const
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135 {
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136 return low == b.low && high == b.high;
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137 }
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138
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139 inline bool
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140 wide_int_bitmask::operator != (wide_int_bitmask b) const
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141 {
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142 return low != b.low || high != b.high;
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143 }
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144
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145 #endif /* ! GCC_WIDE_INT_BITMASK_H */
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