1 /* A class for building vector integer constants. 2 Copyright (C) 2017-2018 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 (poly_uint64, 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 (poly_uint64 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 known_eq (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 91