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annotate gcc/config/iq2000/constraints.md @ 68:561a7518be6b

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update gcc-4.6
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sun, 21 Aug 2011 07:07:55 +0900
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children 04ced10e8804
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68
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 ;; Constraints for Vitesse IQ2000 processors
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2 ;; Copyright (C) 2011 Free Software Foundation, Inc.
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3
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4 ;; This file is part of GCC.
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5
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6 ;; GCC is free software; you can redistribute it and/or modify
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7 ;; it under the terms of the GNU General Public License as published by
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8 ;; the Free Software Foundation; either version 3, or (at your option)
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9 ;; any later version.
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10
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11 ;; GCC is distributed in the hope that it will be useful,
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12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 ;; GNU General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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17 ;; along with GCC; see the file COPYING3. If not see
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18 ;; <http://www.gnu.org/licenses/>.
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19
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20 ;; Register constraints.
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21 (define_register_constraint "b" "ALL_REGS"
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22 "@internal")
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23
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24 (define_register_constraint "d" "GR_REGS"
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25 "@internal")
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26
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27 (define_register_constraint "y" "GR_REGS"
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28 "@internal")
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29
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30 ;; Integer constraints.
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31 (define_constraint "I"
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32 "A 16-bit signed integer."
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33 (and (match_code "const_int")
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34 (match_test "IN_RANGE (ival, -32768, 32767)")))
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35
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36 (define_constraint "J"
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37 "Zero."
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38 (and (match_code "const_int")
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39 (match_test "ival == 0")))
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40
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41 (define_constraint "K"
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42 "A 16-bit unsigned integer"
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43 (and (match_code "const_int")
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44 (match_test "IN_RANGE (ival, 0, 65535)")))
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45
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46 (define_constraint "L"
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47 "A 32-bit constant whose bottom 16 bits are zero."
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48 (and (match_code "const_int")
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49 (ior (match_test "(ival | 0x7fff0000) == 0x7fff0000")
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50 (match_test "(ival | 0x7fff0000) + 0x10000 == 0"))))
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51
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52 (define_constraint "M"
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53 "Any constant not matched by 'I', 'K', or 'L'."
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54 (and (match_code "const_int")
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55 (match_test "!insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")
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56 (match_test "!insn_const_int_ok_for_constraint (ival, CONSTRAINT_K)")
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57 (match_test "!insn_const_int_ok_for_constraint (ival, CONSTRAINT_L)")))
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58
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59 (define_constraint "N"
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60 "Any constant whose lower or upper 16 bits are 0xffff."
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61 (and (match_code "const_int")
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62 (ior (match_test "(ival & 0xffff) == 0xffff")
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63 (match_test "(ival & 0xffff0000) == 0xffff0000"))))
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64
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65 (define_constraint "O"
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66 "A 5-bit signed integer."
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67 (and (match_code "const_int")
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68 (match_test "IN_RANGE (ival, -31, 31)")))
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69
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70 ;; Floating-point constraints.
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71 (define_constraint "G"
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72 "Floating-point zero."
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73 (and (match_code "const_double")
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74 (match_test "op == CONST0_RTX (mode)")))
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75
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76 ;; Extra constraints.
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77 (define_constraint "R"
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78 "A memory reference which takes one word for the instruction."
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79 (match_test "simple_memory_operand (op, mode)"))