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annotate gcc/config/microblaze/constraints.md @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents 561a7518be6b
children 84e7813d76e9
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 ;; Constraint definitions for Xilinx MicroBlaze processors.
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2 ;; Copyright (C) 2010-2017 Free Software Foundation, Inc.
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3
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4 ;; Contributed by Michael Eager <eager@eagercon.com>.
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5
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6 ;; This file is part of GCC.
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7
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8 ;; GCC is free software; you can redistribute it and/or modify
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9 ;; it under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 3, or (at your option)
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11 ;; any later version.
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12
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13 ;; GCC is distributed in the hope that it will be useful,
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14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 ;; GNU General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with GCC; see the file COPYING3. If not see
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20 ;; <http://www.gnu.org/licenses/>.
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21
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22 (define_register_constraint "d" "GR_REGS"
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23 "A general register.")
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24
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25 (define_register_constraint "z" "ST_REGS"
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26 "A status register.")
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27
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28 ;; Define integer constraints
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29
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30 (define_constraint "I"
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31 "A signed 16-bit constant."
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32 (and (match_code "const_int")
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33 (match_test "SMALL_OPERAND (ival)")))
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34
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35 (define_constraint "J"
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36 "Integer zero."
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37 (and (match_code "const_int")
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38 (match_test "ival == 0")))
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39
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40 (define_constraint "M"
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41 "A constant which needs two instructions to load."
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42 (and (match_code "const_int")
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43 (match_test "LARGE_OPERAND (ival)")))
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44
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45 (define_constraint "N"
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46 "A constant in the range -65535 to -1 (inclusive)."
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47 (and (match_code "const_int")
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48 (match_test "(unsigned HOST_WIDE_INT) (ival + 0xffff) < 0xffff")))
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49
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50 (define_constraint "P"
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51 "A constant in the range 1 to 65535 (inclusive)."
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52 (and (match_code "const_int")
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53 (match_test "ival > 0 && ival < 0x10000")))
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54
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55 ;; Define floating point constraints
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56
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57 (define_constraint "G"
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58 "Floating-point zero."
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59 (and (match_code "const_double")
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60 (match_test "op == CONST0_RTX (mode)")))
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61
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62 ;; Define memory constraints
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63
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64 (define_memory_constraint "R"
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65 "Memory operand which fits in single instruction."
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66 (and (match_code "mem")
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67 (match_test "simple_memory_operand (op, GET_MODE (op))")))
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68
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69 (define_memory_constraint "T"
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70 "Double word operand."
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71 (and (match_code "mem")
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72 (match_test "double_memory_operand (op, GET_MODE (op))")))
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73
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74 (define_memory_constraint "Q"
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75 "Memory operand which is a single register."
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76 (and (match_code "mem")
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77 (match_test "GET_CODE ( XEXP (op, 0)) == REG")))