Line data    Source code

       1              : /* A class for building vector rtx constants.
       2              :    Copyright (C) 2017-2026 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_RTX_VECTOR_BUILDER_H
      21              : #define GCC_RTX_VECTOR_BUILDER_H
      22              : 
      23              : #include "vector-builder.h"
      24              : 
      25              : /* This class is used to build VECTOR_CSTs from a sequence of elements.
      26              :    See vector_builder for more details.  */
      27     42106290 : class rtx_vector_builder : public vector_builder<rtx, machine_mode,
      28              :                                                  rtx_vector_builder>
      29              : {
      30              :   typedef vector_builder<rtx, machine_mode, rtx_vector_builder> parent;
      31              :   friend class vector_builder<rtx, machine_mode, rtx_vector_builder>;
      32              : 
      33              : public:
      34        40633 :   rtx_vector_builder () : m_mode (VOIDmode) {}
      35              :   rtx_vector_builder (machine_mode, unsigned int, unsigned int);
      36              :   rtx build (rtvec);
      37              :   rtx build ();
      38              : 
      39              :   machine_mode mode () const { return m_mode; }
      40              : 
      41              :   void new_vector (machine_mode, unsigned int, unsigned int);
      42              : 
      43              : private:
      44              :   bool equal_p (rtx, rtx) const;
      45              :   bool allow_steps_p () const;
      46              :   bool integral_p (rtx) const;
      47              :   poly_wide_int step (rtx, rtx) const;
      48              :   rtx apply_step (rtx, unsigned int, const poly_wide_int &) const;
      49              :   bool can_elide_p (rtx) const { return true; }
      50              :   void note_representative (rtx *, rtx) {}
      51              : 
      52        40633 :   static poly_uint64 shape_nelts (machine_mode mode)
      53        81266 :     { return GET_MODE_NUNITS (mode); }
      54        48518 :   static poly_uint64 nelts_of (const_rtx x)
      55        48518 :     { return CONST_VECTOR_NUNITS (x); }
      56        48518 :   static unsigned int npatterns_of (const_rtx x)
      57        48518 :     { return CONST_VECTOR_NPATTERNS (x); }
      58        48518 :   static unsigned int nelts_per_pattern_of (const_rtx x)
      59        48518 :     { return CONST_VECTOR_NELTS_PER_PATTERN (x); }
      60              : 
      61              :   rtx find_cached_value ();
      62              : 
      63              :   machine_mode m_mode;
      64              : };
      65              : 
      66              : /* Create a new builder for a vector of mode MODE.  Initially encode the
      67              :    value as NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements
      68              :    each.  */
      69              : 
      70              : inline
      71     42065829 : rtx_vector_builder::rtx_vector_builder (machine_mode mode,
      72              :                                         unsigned int npatterns,
      73     42065829 :                                         unsigned int nelts_per_pattern)
      74              : {
      75     42065829 :   new_vector (mode, npatterns, nelts_per_pattern);
      76     42065829 : }
      77              : 
      78              : /* Start building a new vector of mode MODE.  Initially encode the value
      79              :    as NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements each.  */
      80              : 
      81              : inline void
      82     42106462 : rtx_vector_builder::new_vector (machine_mode mode, unsigned int npatterns,
      83              :                                 unsigned int nelts_per_pattern)
      84              : {
      85     42106462 :   m_mode = mode;
      86     84212924 :   parent::new_vector (GET_MODE_NUNITS (mode), npatterns, nelts_per_pattern);
      87     42106462 : }
      88              : 
      89              : /* Return true if elements ELT1 and ELT2 are equal.  */
      90              : 
      91              : inline bool
      92       989887 : rtx_vector_builder::equal_p (rtx elt1, rtx elt2) const
      93              : {
      94       989887 :   return rtx_equal_p (elt1, elt2);
      95              : }
      96              : 
      97              : /* Return true if a stepped representation is OK.  We don't allow
      98              :    linear series for anything other than integers, to avoid problems
      99              :    with rounding.  */
     100              : 
     101              : inline bool
     102       101568 : rtx_vector_builder::allow_steps_p () const
     103              : {
     104       101568 :   return is_a <scalar_int_mode> (GET_MODE_INNER (m_mode));
     105              : }
     106              : 
     107              : /* Return true if element ELT can be interpreted as an integer.  */
     108              : 
     109              : inline bool
     110       497685 : rtx_vector_builder::integral_p (rtx elt) const
     111              : {
     112       165895 :   return CONST_SCALAR_INT_P (elt);
     113              : }
     114              : 
     115              : /* Return the value of element ELT2 minus the value of element ELT1.
     116              :    Both elements are known to be CONST_SCALAR_INT_Ps.  */
     117              : 
     118              : inline poly_wide_int
     119       464764 : rtx_vector_builder::step (rtx elt1, rtx elt2) const
     120              : {
     121       464764 :   return (wi::to_poly_wide (elt2, GET_MODE_INNER (m_mode))
     122      1394292 :           - wi::to_poly_wide (elt1, GET_MODE_INNER (m_mode)));
     123              : }
     124              : 
     125              : #endif