1 /* A class for building vector integer constants. 2 Copyright (C) 2017-2020 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, 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 35 public: 36 int_vector_builder () {} 37 int_vector_builder (poly_uint64, unsigned int, unsigned int); 38 39 using parent::new_vector; 40 41 private: 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 57 template<typename T> 58 inline 59 int_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 68 template<typename T> 69 inline bool 70 int_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 77 template<typename T> 78 inline T 79 int_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 86 template<typename T> 87 inline T 88 int_vector_builder<T>::apply_step (T base, unsigned int factor, T step) const 89 { 90 return base + factor * step; 91 } 92 93 #endif 94