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comparison gcc/config/avr/constraints.md @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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1 ;; Constraint definitions for ATMEL AVR micro controllers.
2 ;; Copyright (C) 2006, 2007 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 ;; Register constraints
21
22 (define_register_constraint "t" "R0_REG"
23 "Temporary register r0")
24
25 (define_register_constraint "b" "BASE_POINTER_REGS"
26 "Base pointer registers (r28--r31)")
27
28 (define_register_constraint "e" "POINTER_REGS"
29 "Pointer registers (r26--r31)")
30
31 (define_register_constraint "w" "ADDW_REGS"
32 "Registers from r24 to r31. These registers
33 can be used in @samp{adiw} command.")
34
35 (define_register_constraint "d" "LD_REGS"
36 "Registers from r16 to r31.")
37
38 (define_register_constraint "l" "NO_LD_REGS"
39 "Registers from r0 to r15.")
40
41 (define_register_constraint "a" "SIMPLE_LD_REGS"
42 "Registers from r16 to r23.")
43
44 (define_register_constraint "x" "POINTER_X_REGS"
45 "Register pair X (r27:r26).")
46
47 (define_register_constraint "y" "POINTER_Y_REGS"
48 "Register pair Y (r29:r28).")
49
50 (define_register_constraint "z" "POINTER_Z_REGS"
51 "Register pair Z (r31:r30).")
52
53 (define_register_constraint "q" "STACK_REG"
54 "Stack pointer register (SPH:SPL).")
55
56 (define_constraint "I"
57 "Integer constant in the range 0 @dots{} 63."
58 (and (match_code "const_int")
59 (match_test "ival >= 0 && ival <= 63")))
60
61 (define_constraint "J"
62 "Integer constant in the range -63 @dots{} 0."
63 (and (match_code "const_int")
64 (match_test "ival <= 0 && ival >= -63")))
65
66 (define_constraint "K"
67 "Integer constant 2."
68 (and (match_code "const_int")
69 (match_test "ival == 2")))
70
71 (define_constraint "L"
72 "Zero."
73 (and (match_code "const_int")
74 (match_test "ival == 0")))
75
76 (define_constraint "M"
77 "Integer constant in the range 0 @dots{} 0xff."
78 (and (match_code "const_int")
79 (match_test "ival >= 0 && ival <= 0xff")))
80
81 (define_constraint "N"
82 "Constant integer @minus{}1."
83 (and (match_code "const_int")
84 (match_test "ival == -1")))
85
86 (define_constraint "O"
87 "Constant integer 8, 16, or 24."
88 (and (match_code "const_int")
89 (match_test "ival == 8 || ival == 16 || ival == 24")))
90
91 (define_constraint "P"
92 "Constant integer 1."
93 (and (match_code "const_int")
94 (match_test "ival == 1")))
95
96 (define_constraint "G"
97 "Constant float 0."
98 (and (match_code "const_double")
99 (match_test "op == CONST0_RTX (SFmode)")))
100
101 (define_constraint "R"
102 "Integer constant in the range -6 @dots{} 5."
103 (and (match_code "const_int")
104 (match_test "ival >= -6 && ival <= 5")))
105
106 (define_memory_constraint "Q"
107 "A memory address based on Y or Z pointer with displacement."
108 (and (match_code "mem")
109 (match_test "extra_constraint_Q (op)")))