1 ;; Constraint definitions for Adaptiva epiphany
2 ;; Copyright (C) 2007-2024 Free Software Foundation, Inc.
3 ;; Contributed by Embecosm on behalf of Adapteva, Inc.
5 ;; This file is part of GCC.
7 ;; GCC is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 3, or (at your option)
12 ;; GCC is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GCC; see the file COPYING3. If not see
19 ;; <http://www.gnu.org/licenses/>.
21 ;; Integer constraints
23 (define_constraint "U16"
24 "An unsigned 16-bit constant."
25 (ior (and (match_code "const_int")
26 (match_test "IMM16 (ival)"))
27 (and (match_code "symbol_ref,label_ref,const")
28 (match_test "epiphany_small16 (op)"))))
30 (define_constraint "K"
31 "An unsigned 5-bit constant."
32 (and (match_code "const_int")
33 (match_test "IMM5 (ival)")))
35 ;; This could also accept symbol_ref, label_ref or const if we introduce
36 ;; a small area and/or attribute that satisfies the 11-bit signed range.
37 (define_constraint "L"
38 "A signed 11-bit constant."
39 (and (match_code "const_int")
40 (match_test "SIMM11 (ival)")))
42 (define_constraint "CnL"
43 "A negated signed 11-bit constant."
44 (and (match_code "const_int")
45 (match_test "SIMM11 (-ival)")))
47 (define_constraint "Cm1"
48 "A signed 11-bit constant added to -1"
49 (and (match_code "const_int")
50 (match_test "SIMM11 (ival+1)")
51 (match_test "epiphany_m1reg >= 0")))
53 (define_constraint "Cl1"
55 (and (match_code "const_int")
56 (match_test "ival == (ival | ~(ival-1))")
57 (match_test "epiphany_m1reg >= 0")))
59 (define_constraint "Cr1"
61 (and (match_code "const_int")
62 (match_test "ival == (ival & ~(ival+1))")
63 (match_test "epiphany_m1reg >= 0")))
65 (define_constraint "Cal"
66 "Constant for arithmetic/logical operations"
67 (match_test "(flag_pic
68 ? nonsymbolic_immediate_operand (op, VOIDmode)
69 : immediate_operand (op, VOIDmode))"))
71 (define_constraint "Csy"
72 "Symbolic constant for call/jump instruction"
73 (match_test "symbolic_operand (op, VOIDmode)"))
75 ;; Register constraints
76 ;; proper register constraints define a register class and can thus
77 ;; drive register allocation and reload. OTOH sometimes we want to
80 ;; The register class usable in short insns.
81 ;; Subject to TARGET_PREFER_SHORT_INSN_REGS.
82 (define_register_constraint "Rcs" "SHORT_INSN_REGS"
83 "short insn register class.")
85 ; The registers that can be used to hold a sibcall call address.
86 ; This must not conflict with any callee-saved registers.
87 (define_register_constraint "Rsc" "SIBCALL_REGS"
88 "sibcall register class")
90 ; The registers that can be used to hold a status value
91 (define_register_constraint "Rct" "CORE_CONTROL_REGS"
92 "Core control register class")
94 ;; The register group usable in short insns.
95 (define_constraint "Rgs"
96 "short insn register group."
97 (and (match_code "reg")
98 (match_test "REGNO (op) >= FIRST_PSEUDO_REGISTER || REGNO (op) <= 7")))
100 ;; Constant suitable for the addsi3_r pattern.
101 ;; No idea why we previously used RTX_OK_FOR_OFFSET with SI, HI an QI
102 ;; modes. The instruction in question accepts 11 bit signed constants.
103 (define_constraint "Car"
105 (and (match_code "const_int")
106 (match_test "IN_RANGE (INTVAL (op), -1024, 1023)")))
108 ;; The return address if it can be replaced with GPR_LR.
109 (define_constraint "Rra"
110 "return address constraint - register variant"
111 (and (match_code "unspec")
112 (match_test "XINT (op, 1) == UNSPEC_RETURN_ADDR")
113 (match_test "!MACHINE_FUNCTION (cfun)->lr_clobbered")))
115 (define_constraint "Rcc"
116 "integer condition code"
117 (and (match_code "reg")
118 (match_test "REGNO (op) == CC_REGNUM")))
120 ;; The return address, which might be a stack slot. */
121 (define_constraint "Sra"
122 "return address constraint - memory variant"
123 (and (match_code "unspec")
124 (match_test "XINT (op, 1) == UNSPEC_RETURN_ADDR")))
126 (define_constraint "Cfm"
127 "control register values to switch fp mode"
128 (and (match_code "const")
129 (match_test "GET_CODE (XEXP (op, 0)) == UNSPEC")
130 (match_test "XINT (XEXP (op, 0), 1) == UNSPEC_FP_MODE")))