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131
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1 /* A class for building vector integer constants.
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145
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2 Copyright (C) 2017-2020 Free Software Foundation, Inc.
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131
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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_INT_VECTOR_BUILDER_H
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21 #define GCC_INT_VECTOR_BUILDER_H 1
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22
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23 #include "vector-builder.h"
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24
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25 /* This class is used to build vectors of integer type T using the same
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26 encoding as tree and rtx constants. See vector_builder for more
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27 details. */
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28 template<typename T>
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29 class int_vector_builder : public vector_builder<T, poly_uint64,
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30 int_vector_builder<T> >
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131
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31 {
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32 typedef vector_builder<T, poly_uint64, int_vector_builder> parent;
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33 friend class vector_builder<T, poly_uint64, int_vector_builder>;
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131
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34
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35 public:
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36 int_vector_builder () {}
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37 int_vector_builder (poly_uint64, unsigned int, unsigned int);
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38
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39 using parent::new_vector;
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40
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41 private:
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42 bool equal_p (T, T) const;
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43 bool allow_steps_p () const { return true; }
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44 bool integral_p (T) const { return true; }
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45 T step (T, T) const;
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46 T apply_step (T, unsigned int, T) const;
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47 bool can_elide_p (T) const { return true; }
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48 void note_representative (T *, T) {}
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49
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50 static poly_uint64 shape_nelts (poly_uint64 x) { return x; }
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51 };
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52
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53 /* Create a new builder for a vector with FULL_NELTS elements.
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54 Initially encode the value as NPATTERNS interleaved patterns with
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55 NELTS_PER_PATTERN elements each. */
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56
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57 template<typename T>
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58 inline
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59 int_vector_builder<T>::int_vector_builder (poly_uint64 full_nelts,
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60 unsigned int npatterns,
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61 unsigned int nelts_per_pattern)
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62 {
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63 new_vector (full_nelts, npatterns, nelts_per_pattern);
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64 }
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65
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66 /* Return true if elements ELT1 and ELT2 are equal. */
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67
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68 template<typename T>
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69 inline bool
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70 int_vector_builder<T>::equal_p (T elt1, T elt2) const
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71 {
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72 return known_eq (elt1, elt2);
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73 }
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74
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75 /* Return the value of element ELT2 minus the value of element ELT1. */
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76
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77 template<typename T>
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78 inline T
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79 int_vector_builder<T>::step (T elt1, T elt2) const
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80 {
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81 return elt2 - elt1;
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82 }
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83
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84 /* Return a vector element with the value BASE + FACTOR * STEP. */
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85
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86 template<typename T>
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87 inline T
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88 int_vector_builder<T>::apply_step (T base, unsigned int factor, T step) const
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89 {
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90 return base + factor * step;
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91 }
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92
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93 #endif
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