gcc/config/bpf/predicates.md

   1 ;; Predicate definitions for eBPF.
   2 ;; Copyright (C) 2019-2020 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
   7 ;; it under the terms of the GNU General Public License as published by
   8 ;; the Free Software Foundation; either version 3, or (at your option)
   9 ;; any later version.
  10 ;;
  11 ;; GCC is distributed in the hope that it will be useful,
  12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;; GNU General Public License 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 (define_predicate "reg_or_imm_operand"
  21   (ior (and (match_code "const_int")
  22             (match_test "IN_RANGE (INTVAL (op), -1 - 0x7fffffff, 0x7fffffff)"))
  23        (match_operand 0 "register_operand")))
  24
  25 (define_predicate "imm32_operand"
  26   (ior (and (match_code "const_int")
  27             (match_test "IN_RANGE (INTVAL (op), 0, 0xffffffff)"))
  28        (match_code "symbol_ref,label_ref,const")))
  29
  30 (define_predicate "lddw_operand"
  31   (match_code "symbol_ref,label_ref,const,const_double,const_int"))
  32
  33 (define_predicate "call_operand"
  34   (match_code "reg,symbol_ref,const_int,const")
  35 {
  36   if (GET_CODE (op) == CONST)
  37     {
  38       op = XEXP (op, 0);
  39
  40       switch (GET_CODE (op))
  41         {
  42         case SYMBOL_REF:
  43         case LABEL_REF:
  44         case CONST_INT:
  45           return true;
  46           break;
  47         default:
  48           break;
  49         }
  50
  51       return false;
  52     }
  53
  54   return true;
  55 })
  56
  57 (define_predicate "mov_src_operand"
  58   (ior (match_operand 0 "memory_operand")
  59        (match_operand 0 "reg_or_imm_operand")
  60        (match_operand 0 "lddw_operand")))
  61
  62 (define_predicate "register_compare_operator"
  63   (match_code "eq,ne,geu,gtu,ge,gt"))
  64