1/* A class for building vector integer constants.
2 Copyright (C) 2017-2023 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#ifndef GCC_INT_VECTOR_BUILDER_H
21#define GCC_INT_VECTOR_BUILDER_H 1
22
23#include "vector-builder.h"
24
25/* This class is used to build vectors of integer type T using the same
26 encoding as tree and rtx constants. See vector_builder for more
27 details. */
28template<typename T>
29class int_vector_builder : public vector_builder<T, poly_uint64,
30 int_vector_builder<T> >
31{
32 typedef vector_builder<T, poly_uint64, int_vector_builder> parent;
33 friend class vector_builder<T, poly_uint64, int_vector_builder>;
34
35public:
36 int_vector_builder () {}
37 int_vector_builder (poly_uint64, unsigned int, unsigned int);
38
39 using parent::new_vector;
40
41private:
42 bool equal_p (T, T) const;
43 bool allow_steps_p () const { return true; }
44 bool integral_p (T) const { return true; }
45 T step (T, T) const;
46 T apply_step (T, unsigned int, T) const;
47 bool can_elide_p (T) const { return true; }
48 void note_representative (T *, T) {}
49
50 static poly_uint64 shape_nelts (poly_uint64 x) { return x; }
51};
52
53/* Create a new builder for a vector with FULL_NELTS elements.
54 Initially encode the value as NPATTERNS interleaved patterns with
55 NELTS_PER_PATTERN elements each. */
56
57template<typename T>
58inline
59int_vector_builder<T>::int_vector_builder (poly_uint64 full_nelts,
60 unsigned int npatterns,
61 unsigned int nelts_per_pattern)
62{
63 new_vector (full_nelts, npatterns, nelts_per_pattern);
64}
65
66/* Return true if elements ELT1 and ELT2 are equal. */
67
68template<typename T>
69inline bool
70int_vector_builder<T>::equal_p (T elt1, T elt2) const
71{
72 return known_eq (elt1, elt2);
73}
74
75/* Return the value of element ELT2 minus the value of element ELT1. */
76
77template<typename T>
78inline T
79int_vector_builder<T>::step (T elt1, T elt2) const
80{
81 return elt2 - elt1;
82}
83
84/* Return a vector element with the value BASE + FACTOR * STEP. */
85
86template<typename T>
87inline T
88int_vector_builder<T>::apply_step (T base, unsigned int factor, T step) const
89{
90 return base + factor * step;
91}
92
93#endif
94

source code of gcc/int-vector-builder.h