1;; Constraint definitions for MIPS.
2;; Copyright (C) 2006 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 2, 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 COPYING.  If not, write to
18;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,
19;; Boston, MA 02110-1301, USA.
20
21;; Register constraints
22
23(define_register_constraint "d" "BASE_REG_CLASS"
24  "An address register.  This is equivalent to @code{r} unless
25   generating MIPS16 code.")
26
27(define_register_constraint "t" "T_REG"
28  "@internal")
29
30(define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : NO_REGS"
31  "A floating-point register (if available).")
32
33(define_register_constraint "h" "HI_REG"
34  "The @code{hi} register.")
35
36(define_register_constraint "l" "LO_REG"
37  "The @code{lo} register.")
38
39(define_register_constraint "x" "MD_REGS"
40  "The @code{hi} and @code{lo} registers.")
41
42(define_register_constraint "b" "ALL_REGS"
43  "@internal")
44
45(define_register_constraint "c" "TARGET_ABICALLS ? PIC_FN_ADDR_REG
46				 : TARGET_MIPS16 ? M16_NA_REGS
47				 : GR_REGS"
48  "A register suitable for use in an indirect jump.  This will always be
49   @code{$25} for @option{-mabicalls}.")
50
51(define_register_constraint "e" "LEA_REGS"
52  "@internal")
53
54(define_register_constraint "j" "PIC_FN_ADDR_REG"
55  "@internal")
56
57(define_register_constraint "v" "V1_REG"
58  "@internal")
59
60(define_register_constraint "y" "GR_REGS"
61  "Equivalent to @code{r}; retained for backwards compatibility.")
62
63(define_register_constraint "z" "ST_REGS"
64  "A floating-point condition code register.")
65
66(define_register_constraint "A" "DSP_ACC_REGS"
67  "@internal")
68
69(define_register_constraint "a" "ACC_REGS"
70  "@internal")
71
72(define_register_constraint "B" "COP0_REGS"
73  "@internal")
74
75(define_register_constraint "C" "COP2_REGS"
76  "@internal")
77
78(define_register_constraint "D" "COP3_REGS"
79  "@internal")
80
81;; Integer constraints
82
83(define_constraint "I"
84  "A signed 16-bit constant (for arithmetic instructions)."
85  (and (match_code "const_int")
86       (match_test "SMALL_OPERAND (ival)")))
87
88(define_constraint "J"
89  "Integer zero."
90  (and (match_code "const_int")
91       (match_test "ival == 0")))
92
93(define_constraint "K"
94  "An unsigned 16-bit constant (for logic instructions)."
95  (and (match_code "const_int")
96       (match_test "SMALL_OPERAND_UNSIGNED (ival)")))
97 
98(define_constraint "L"
99  "A signed 32-bit constant in which the lower 16 bits are zero.
100   Such constants can be loaded using @code{lui}."
101  (and (match_code "const_int")
102       (match_test "LUI_OPERAND (ival)")))
103
104(define_constraint "M"
105  "A constant that cannot be loaded using @code{lui}, @code{addiu}
106   or @code{ori}."
107  (and (match_code "const_int")
108       (match_test "!SMALL_OPERAND (ival)")
109       (match_test "!SMALL_OPERAND_UNSIGNED (ival)")
110       (match_test "!LUI_OPERAND (ival)")))
111
112(define_constraint "N"
113  "A constant in the range -65535 to -1 (inclusive)."
114  (and (match_code "const_int")
115       (match_test "ival >= -0xffff && ival < 0")))
116
117(define_constraint "O"
118  "A signed 15-bit constant."
119  (and (match_code "const_int")
120       (match_test "ival >= -0x4000 && ival < 0x4000")))
121
122(define_constraint "P"
123  "A constant in the range 1 to 65535 (inclusive)."
124  (and (match_code "const_int")
125       (match_test "ival > 0 && ival < 0x10000")))
126
127;; Floating-point constraints
128
129(define_constraint "G"
130  "Floating-point zero."
131  (and (match_code "const_double")
132       (match_test "op == CONST0_RTX (mode)")))
133
134;; General constraints
135
136(define_constraint "Q"
137  "@internal"
138  (match_operand 0 "const_arith_operand"))
139
140(define_memory_constraint "R"
141  "An address that can be used in a non-macro load or store."
142  (and (match_code "mem")
143       (match_test "mips_fetch_insns (op) == 1")))
144
145(define_constraint "S"
146  "@internal
147   A constant call address."
148  (and (match_operand 0 "call_insn_operand")
149       (match_test "CONSTANT_P (op)")))
150
151(define_constraint "T"
152  "@internal
153   A constant @code{move_operand} that cannot be safely loaded into @code{$25}
154   using @code{la}."
155  (and (match_operand 0 "move_operand")
156       (match_test "CONSTANT_P (op)")
157       (match_test "mips_dangerous_for_la25_p (op)")))
158
159(define_constraint "U"
160  "@internal
161   A constant @code{move_operand} that can be safely loaded into @code{$25}
162   using @code{la}."
163  (and (match_operand 0 "move_operand")
164       (match_test "CONSTANT_P (op)")
165       (match_test "!mips_dangerous_for_la25_p (op)")))
166
167(define_memory_constraint "W"
168  "@internal
169   A memory address based on a member of @code{BASE_REG_CLASS}.  This is
170   true for all non-mips16 references (although it can sometimes be implicit
171   if @samp{!TARGET_EXPLICIT_RELOCS}).  For MIPS16, it excludes stack and
172   constant-pool references."
173  (and (match_code "mem")
174       (match_operand 0 "memory_operand")
175       (ior (match_test "!TARGET_MIPS16")
176	    (and (not (match_operand 0 "stack_operand"))
177		 (not (match_test "CONSTANT_P (XEXP (op, 0))"))))))
178
179(define_constraint "YG"
180  "@internal
181   A vector zero."
182  (and (match_code "const_vector")
183       (match_test "op == CONST0_RTX (mode)")))
184
185(define_constraint "YA"
186  "@internal
187   An unsigned 6-bit constant."
188  (and (match_code "const_int")
189       (match_test "UIMM6_OPERAND (ival)")))
190
191(define_constraint "YB"
192  "@internal
193   A signed 10-bit constant."
194  (and (match_code "const_int")
195       (match_test "IMM10_OPERAND (ival)")))
196