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| Commit | Line | Data |
|---|---|---|
| 3965b35f | 1 | ;; Constraint definitions for OpenRISC |
| 99dee823 | 2 | ;; Copyright (C) 2018-2021 Free Software Foundation, Inc. |
| 3965b35f SH |
3 | ;; Contributed by Stafford Horne |
| 4 | ||
| 5 | ;; This file is part of GCC. | |
| 6 | ||
| 7 | ;; GCC is free software; you can redistribute it and/or modify it | |
| 8 | ;; under the terms of the GNU General Public License as published | |
| 9 | ;; by the Free Software Foundation; either version 3, or (at your | |
| 10 | ;; option) any later version. | |
| 11 | ||
| 12 | ;; GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 13 | ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 14 | ;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 15 | ;; License for more details. | |
| 16 | ||
| 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/>. | |
| 20 | ||
| 21 | ;; ------------------------------------------------------------------------- | |
| 22 | ;; Constraints | |
| 23 | ;; ------------------------------------------------------------------------- | |
| 24 | ||
| 25 | ; We use: | |
| 26 | ; c - sibcall registers | |
| 44080af9 | 27 | ; d - double pair base registers (excludes r0, r30 and r31 which overflow) |
| fd631eb5 | 28 | ; t - got address registers (excludes LR (r9) which is clobbered by set_got) |
| 3965b35f SH |
29 | ; I - constant signed 16-bit |
| 30 | ; K - constant unsigned 16-bit | |
| 31 | ; M - constant signed 16-bit shifted left 16-bits (l.movhi) | |
| 32 | ; O - constant zero | |
| 33 | ||
| 34 | (define_register_constraint "c" "SIBCALL_REGS" | |
| 35 | "Registers which can hold a sibling call address") | |
| 36 | ||
| 44080af9 SH |
37 | (define_register_constraint "d" "DOUBLE_REGS" |
| 38 | "Registers which can be used for double reg pairs.") | |
| 39 | ||
| fd631eb5 SH |
40 | (define_register_constraint "t" "GOT_REGS" |
| 41 | "Registers which can be used to store the Global Offset Table (GOT) address.") | |
| 42 | ||
| 3965b35f SH |
43 | ;; Immediates |
| 44 | (define_constraint "I" | |
| 45 | "A signed 16-bit immediate in the range -32768 to 32767." | |
| 46 | (and (match_code "const_int") | |
| 47 | (match_test "IN_RANGE (ival, -32768, 32767)"))) | |
| 48 | ||
| 49 | (define_constraint "K" | |
| 50 | "An unsigned 16-bit immediate in the range 0 to 0xffff." | |
| 51 | (and (match_code "const_int") | |
| 52 | (match_test "IN_RANGE (ival, 0, 65535)"))) | |
| 53 | ||
| 54 | (define_constraint "M" | |
| 55 | "A shifted signed 16-bit constant suitable for l.movhi." | |
| 56 | (and (match_code "const_int") | |
| 57 | (match_test "(ival & 0xffff) == 0 | |
| 58 | && (ival >> 31 == -1 || ival >> 31 == 0)"))) | |
| 59 | ||
| 60 | (define_constraint "O" | |
| 61 | "The constant zero" | |
| 62 | (and (match_code "const_int") | |
| 63 | (match_test "ival == 0"))) |