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1 ;;- Machine description for GNU compiler -- S/390 / zSeries version.
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2 ;; Subst patterns.
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3 ;; Copyright (C) 2016-2020 Free Software Foundation, Inc.
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4 ;; Contributed by Andreas Krebbel (Andreas.Krebbel@de.ibm.com)
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5
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6 ;; This file is part of GCC.
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7
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8 ;; GCC is free software; you can redistribute it and/or modify it under
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9 ;; the terms of the GNU General Public License as published by the Free
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10 ;; Software Foundation; either version 3, or (at your option) any later
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11 ;; version.
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12
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13 ;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 ;; for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with GCC; see the file COPYING3. If not see
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20 ;; <http://www.gnu.org/licenses/>.
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21
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22 (define_code_iterator SUBST [rotate ashift lshiftrt ashiftrt])
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23 (define_mode_iterator DSI_VI [SI DI V2QI V4QI V8QI V16QI V2HI V4HI V8HI V2SI V4SI V2DI])
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24
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25 ; This adds an explicit CC reg set to an operation while keeping the
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26 ; set for the operation result as well.
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27 (define_subst "setcc_subst"
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28 [(set (match_operand:DSI 0 "" "")
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29 (match_operand:DSI 1 "" ""))
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30 (clobber (reg:CC CC_REGNUM))]
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31 "s390_match_ccmode(insn, CCSmode)"
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32 [(set (reg CC_REGNUM)
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33 (compare (match_dup 1) (const_int 0)))
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34 (set (match_dup 0) (match_dup 1))])
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35
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36 ; Use this in the insn name.
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37 (define_subst_attr "setcc" "setcc_subst" "" "_cc")
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38
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39 ; This adds an explicit CC reg set to an operation while dropping the
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40 ; result of the operation.
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41 (define_subst "cconly_subst"
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42 [(set (match_operand:DSI 0 "" "")
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43 (match_operand:DSI 1 "" ""))
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44 (clobber (reg:CC CC_REGNUM))]
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45 "s390_match_ccmode(insn, CCSmode)"
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46 [(set (reg CC_REGNUM)
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47 (compare (match_dup 1) (const_int 0)))
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48 (clobber (match_scratch:DSI 0 "=d,d"))])
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49
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50 (define_subst_attr "cconly" "cconly_subst" "" "_cconly")
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51
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52
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53 ; Does transformations to switch between patterns unsing risbg +
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54 ; clobber CC (z10) and risbgn without clobber (zEC12).
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55 (define_subst "clobbercc_or_nocc_subst"
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56 [(set (match_operand 0 "" "") (match_operand 1 "" ""))]
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57 ""
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58 [(set (match_dup 0) (match_dup 1))
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59 (clobber (reg:CC CC_REGNUM))])
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60
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61 ; Use this in the insn name to add the target suffix.
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62 (define_subst_attr "clobbercc_or_nocc" "clobbercc_or_nocc_subst"
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63 "_nocc" "_clobbercc")
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64
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65 ; Use this in the condition.
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66 (define_subst_attr "z10_or_zEC12_cond" "clobbercc_or_nocc_subst"
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67 "TARGET_ZEC12" "TARGET_Z10 && ! TARGET_ZEC12")
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68
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69 ; Use this instead of the risbg instruction.
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70 (define_subst_attr "risbg_n" "clobbercc_or_nocc_subst"
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71 "risbgn" "risbg")
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