projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 191eb16d AK |
1 | ;;- Machine description for GNU compiler -- S/390 / zSeries version. |
| 2 | ;; Subst patterns. | |
| 3 | ;; Copyright (C) 2016 Free Software Foundation, Inc. | |
| 4 | ;; Contributed by Andreas Krebbel (Andreas.Krebbel@de.ibm.com) | |
| 5 | ||
| 6 | ;; This file is part of GCC. | |
| 7 | ||
| 8 | ;; GCC is free software; you can redistribute it and/or modify it under | |
| 9 | ;; the terms of the GNU General Public License as published by the Free | |
| 10 | ;; Software Foundation; either version 3, or (at your option) any later | |
| 11 | ;; version. | |
| 12 | ||
| 13 | ;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 | ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 | ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 | ;; for more details. | |
| 17 | ||
| 18 | ;; You should have received a copy of the GNU General Public License | |
| 19 | ;; along with GCC; see the file COPYING3. If not see | |
| 20 | ;; <http://www.gnu.org/licenses/>. | |
| 21 | ||
| adf22b3f | 22 | (define_code_iterator SUBST [rotate ashift lshiftrt]) |
| 191eb16d AK |
23 | |
| 24 | ; This expands an register/immediate operand to a register+immediate | |
| 25 | ; operand to draw advantage of the address style operand format | |
| 26 | ; providing a addition for free. | |
| 27 | (define_subst "addr_style_op_subst" | |
| 28 | [(set (match_operand:DSI 0 "" "") | |
| 29 | (SUBST:DSI (match_operand:DSI 1 "" "") | |
| 30 | (match_operand:SI 2 "" "")))] | |
| 31 | "" | |
| 32 | [(set (match_dup 0) | |
| 33 | (SUBST:DSI (match_dup 1) | |
| 34 | (plus:SI (match_operand:SI 2 "register_operand" "a") | |
| 35 | (match_operand 3 "const_int_operand" "n"))))]) | |
| 36 | ||
| 37 | ; Use this in the insn name. | |
| 38 | (define_subst_attr "addr_style_op" "addr_style_op_subst" "" "_plus") | |
| 39 | ||
| 40 | ; In the subst pattern the additional const int operand will be used | |
| 41 | ; as displacement. In the normal version %Y is able to print the | |
| 42 | ; operand either as displacement or as base register. | |
| 43 | (define_subst_attr "addr_style_op_ops" "addr_style_op_subst" "%Y2" "%Y3(%2)") | |
| 44 | ||
| 45 | ||
| 46 | ; This substitution adds an explicit AND operation to the second | |
| 47 | ; operand. This way previous operations on the now masked out bits | |
| 48 | ; might get optimized away. | |
| 49 | (define_subst "masked_op_subst" | |
| 50 | [(set (match_operand:DSI 0 "" "") | |
| 51 | (SUBST:DSI (match_operand:DSI 1 "" "") | |
| 52 | (match_operand:SI 2 "" "")))] | |
| 53 | "" | |
| 54 | [(set (match_dup 0) | |
| 55 | (SUBST:DSI (match_dup 1) | |
| 56 | (and:SI (match_dup 2) | |
| 57 | (match_operand:SI 3 "const_int_6bitset_operand" "jm6"))))]) | |
| 58 | ||
| 59 | ; Use this in the insn name. | |
| 60 | (define_subst_attr "masked_op" "masked_op_subst" "" "_and") | |
| 61 |