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1 | /* A class for building vector integer constants. |
2 | Copyright (C) 2017 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along 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. */ | |
28 | template<typename T> | |
29 | class int_vector_builder : public vector_builder<T, int_vector_builder<T> > | |
30 | { | |
31 | typedef vector_builder<T, int_vector_builder> parent; | |
32 | friend class vector_builder<T, int_vector_builder>; | |
33 | ||
34 | public: | |
35 | int_vector_builder () {} | |
36 | int_vector_builder (unsigned int, unsigned int, unsigned int); | |
37 | ||
38 | using parent::new_vector; | |
39 | ||
40 | private: | |
41 | bool equal_p (T, T) const; | |
42 | bool allow_steps_p () const { return true; } | |
43 | bool integral_p (T) const { return true; } | |
44 | T step (T, T) const; | |
45 | T apply_step (T, unsigned int, T) const; | |
46 | bool can_elide_p (T) const { return true; } | |
47 | void note_representative (T *, T) {} | |
48 | }; | |
49 | ||
50 | /* Create a new builder for a vector with FULL_NELTS elements. | |
51 | Initially encode the value as NPATTERNS interleaved patterns with | |
52 | NELTS_PER_PATTERN elements each. */ | |
53 | ||
54 | template<typename T> | |
55 | inline | |
56 | int_vector_builder<T>::int_vector_builder (unsigned int full_nelts, | |
57 | unsigned int npatterns, | |
58 | unsigned int nelts_per_pattern) | |
59 | { | |
60 | new_vector (full_nelts, npatterns, nelts_per_pattern); | |
61 | } | |
62 | ||
63 | /* Return true if elements ELT1 and ELT2 are equal. */ | |
64 | ||
65 | template<typename T> | |
66 | inline bool | |
67 | int_vector_builder<T>::equal_p (T elt1, T elt2) const | |
68 | { | |
69 | return elt1 == elt2; | |
70 | } | |
71 | ||
72 | /* Return the value of element ELT2 minus the value of element ELT1. */ | |
73 | ||
74 | template<typename T> | |
75 | inline T | |
76 | int_vector_builder<T>::step (T elt1, T elt2) const | |
77 | { | |
78 | return elt2 - elt1; | |
79 | } | |
80 | ||
81 | /* Return a vector element with the value BASE + FACTOR * STEP. */ | |
82 | ||
83 | template<typename T> | |
84 | inline T | |
85 | int_vector_builder<T>::apply_step (T base, unsigned int factor, T step) const | |
86 | { | |
87 | return base + factor * step; | |
88 | } | |
89 | ||
90 | #endif |