1*38fd1498Szrj /* Target-dependent costs for lower-subreg.c. 2*38fd1498Szrj Copyright (C) 2012-2018 Free Software Foundation, Inc. 3*38fd1498Szrj 4*38fd1498Szrj This file is part of GCC. 5*38fd1498Szrj 6*38fd1498Szrj GCC is free software; you can redistribute it and/or modify it under 7*38fd1498Szrj the terms of the GNU General Public License as published by the Free 8*38fd1498Szrj Software Foundation; either version 3, or (at your option) any later 9*38fd1498Szrj version. 10*38fd1498Szrj 11*38fd1498Szrj GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or 13*38fd1498Szrj FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14*38fd1498Szrj for more details. 15*38fd1498Szrj 16*38fd1498Szrj You should have received a copy of the GNU General Public License 17*38fd1498Szrj along with GCC; see the file COPYING3. If not see 18*38fd1498Szrj <http://www.gnu.org/licenses/>. */ 19*38fd1498Szrj 20*38fd1498Szrj #ifndef LOWER_SUBREG_H 21*38fd1498Szrj #define LOWER_SUBREG_H 1 22*38fd1498Szrj 23*38fd1498Szrj /* Information about whether, and where, lower-subreg should be applied. */ 24*38fd1498Szrj struct lower_subreg_choices { 25*38fd1498Szrj /* A boolean vector for move splitting that is indexed by mode and is 26*38fd1498Szrj true for each mode that is to have its copies split. */ 27*38fd1498Szrj bool move_modes_to_split[MAX_MACHINE_MODE]; 28*38fd1498Szrj 29*38fd1498Szrj /* True if zero-extensions from word_mode to twice_word_mode should 30*38fd1498Szrj be split. */ 31*38fd1498Szrj bool splitting_zext; 32*38fd1498Szrj 33*38fd1498Szrj /* Index X is true if twice_word_mode shifts by X + BITS_PER_WORD 34*38fd1498Szrj should be split. */ 35*38fd1498Szrj bool splitting_ashift[MAX_BITS_PER_WORD]; 36*38fd1498Szrj bool splitting_lshiftrt[MAX_BITS_PER_WORD]; 37*38fd1498Szrj bool splitting_ashiftrt[MAX_BITS_PER_WORD]; 38*38fd1498Szrj 39*38fd1498Szrj /* True if there is at least one mode that is worth splitting. */ 40*38fd1498Szrj bool something_to_do; 41*38fd1498Szrj }; 42*38fd1498Szrj 43*38fd1498Szrj /* Target-specific information for the subreg lowering pass. */ 44*38fd1498Szrj struct target_lower_subreg { 45*38fd1498Szrj /* An integer mode that is twice as wide as word_mode. */ 46*38fd1498Szrj scalar_int_mode_pod x_twice_word_mode; 47*38fd1498Szrj 48*38fd1498Szrj /* What we have decided to do when optimizing for size (index 0) 49*38fd1498Szrj and speed (index 1). */ 50*38fd1498Szrj struct lower_subreg_choices x_choices[2]; 51*38fd1498Szrj }; 52*38fd1498Szrj 53*38fd1498Szrj extern struct target_lower_subreg default_target_lower_subreg; 54*38fd1498Szrj #if SWITCHABLE_TARGET 55*38fd1498Szrj extern struct target_lower_subreg *this_target_lower_subreg; 56*38fd1498Szrj #else 57*38fd1498Szrj #define this_target_lower_subreg (&default_target_lower_subreg) 58*38fd1498Szrj #endif 59*38fd1498Szrj 60*38fd1498Szrj #endif 61