gcc/config/sh/sync.md

   1 ;; GCC machine description for SH synchronization instructions.
   2 ;; Copyright (C) 2011
   3 ;; Free Software Foundation, Inc.
   4 ;;
   5 ;; This file is part of GCC.
   6 ;;
   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)
  10 ;; any later version.
  11 ;;
  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.
  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 (define_c_enum "unspec" [
  22   UNSPEC_ATOMIC
  23 ])
  24
  25 (define_c_enum "unspecv" [
  26   UNSPECV_CMPXCHG_1
  27   UNSPECV_CMPXCHG_2
  28   UNSPECV_CMPXCHG_3
  29 ])
  30
  31 (define_mode_iterator I124 [QI HI SI])
  32
  33 (define_mode_attr i124suffix [(QI "b") (HI "w") (SI "l")])
  34 (define_mode_attr i124extend_insn [(QI "exts.b") (HI "exts.w") (SI "mov")])
  35
  36 (define_code_iterator FETCHOP [plus minus ior xor and])
  37 (define_code_attr fetchop_name
  38   [(plus "add") (minus "sub") (ior "ior") (xor "xor") (and "and")])
  39 (define_code_attr fetchop_insn
  40   [(plus "add") (minus "sub") (ior "or") (xor "xor") (and "and")])
  41
  42 ;; Linux specific atomic patterns for the Renesas / SuperH SH CPUs.
  43 ;; Linux kernel for SH3/4 has implemented the support for software
  44 ;; atomic sequences.
  45
  46 (define_expand "atomic_compare_and_swap<mode>"
  47   [(match_operand:QI 0 "register_operand" "")           ;; bool success output
  48    (match_operand:I124 1 "register_operand" "")         ;; oldval output
  49    (match_operand:I124 2 "memory_operand" "")           ;; memory
  50    (match_operand:I124 3 "register_operand" "")         ;; expected input
  51    (match_operand:I124 4 "register_operand" "")         ;; newval input
  52    (match_operand:SI 5 "const_int_operand" "")          ;; is_weak
  53    (match_operand:SI 6 "const_int_operand" "")          ;; success model
  54    (match_operand:SI 7 "const_int_operand" "")]         ;; failure model
  55   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
  56 {
  57   rtx addr;
  58
  59   addr = force_reg (Pmode, XEXP (operands[2], 0));
  60   emit_insn (gen_atomic_compare_and_swap<mode>_soft
  61              (gen_lowpart (SImode, operands[1]), addr, operands[3],
  62               operands[4]));
  63   if (<MODE>mode == QImode)
  64     emit_insn (gen_zero_extendqisi2 (gen_lowpart (SImode, operands[1]),
  65                                      operands[1]));
  66   else if (<MODE>mode == HImode)
  67     emit_insn (gen_zero_extendhisi2 (gen_lowpart (SImode, operands[1]),
  68                                      operands[1]));
  69   emit_insn (gen_movqi (operands[0], gen_rtx_REG (QImode, T_REG)));
  70   DONE;
  71 })
  72
  73 (define_insn "atomic_compare_and_swap<mode>_soft"
  74   [(set (match_operand:SI 0 "register_operand" "=&u")
  75         (unspec_volatile:SI
  76           [(mem:I124 (match_operand:SI 1 "register_operand" "u"))
  77            (match_operand:I124 2 "register_operand" "u")
  78            (match_operand:I124 3 "register_operand" "u")]
  79           UNSPECV_CMPXCHG_1))
  80    (set (mem:I124 (match_dup 1))
  81         (unspec_volatile:I124 [(const_int 0)] UNSPECV_CMPXCHG_2))
  82    (set (reg:QI T_REG)
  83         (unspec_volatile:QI [(const_int 0)] UNSPECV_CMPXCHG_3))
  84    (clobber (match_scratch:SI 4 "=&u"))
  85    (clobber (reg:SI R0_REG))
  86    (clobber (reg:SI R1_REG))]
  87   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
  88   "*
  89 {
  90   return \"\\
  91 mova\\t1f, r0\\n\\
  92 \\t<i124extend_insn>\\t%2, %4\\n\\
  93 \\tmov\\tr15, r1\\n\\
  94 \\tmov\\t#(0f-1f), r15\\n\\
  95 0:\\tmov.<i124suffix>\\t@%1, %0\\n\\
  96 \\tcmp/eq\\t%0, %4\\n\\
  97 \\tbf\\t1f\\n\\
  98 \\tmov.<i124suffix>\\t%3, @%1\\n\\
  99 \\t.align\\t2\\n\\
 100 1:\\tmov\tr1, r15\";
 101 }"
 102   [(set_attr "length" "20")])
 103
 104 (define_expand "atomic_fetch_<fetchop_name><mode>"
 105   [(set (match_operand:I124 0 "register_operand" "")
 106         (match_operand:I124 1 "memory_operand" ""))
 107    (set (match_dup 1)
 108         (unspec:I124
 109           [(FETCHOP:I124 (match_dup 1)
 110              (match_operand:I124 2 "register_operand" ""))]
 111           UNSPEC_ATOMIC))
 112    (match_operand:SI 3 "const_int_operand" "")]
 113   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 114 {
 115   rtx addr;
 116
 117   addr = force_reg (Pmode, XEXP (operands[1], 0));
 118   emit_insn (gen_atomic_fetch_<fetchop_name><mode>_soft
 119              (operands[0], addr, operands[2]));
 120   if (<MODE>mode == QImode)
 121     emit_insn (gen_zero_extendqisi2 (gen_lowpart (SImode, operands[0]),
 122                                      operands[0]));
 123   else if (<MODE>mode == HImode)
 124     emit_insn (gen_zero_extendhisi2 (gen_lowpart (SImode, operands[0]),
 125                                      operands[0]));
 126   DONE;
 127 })
 128
 129 (define_insn "atomic_fetch_<fetchop_name><mode>_soft"
 130   [(set (match_operand:I124 0 "register_operand" "=&u")
 131         (mem:I124 (match_operand:SI 1 "register_operand" "u")))
 132    (set (mem:I124 (match_dup 1))
 133         (unspec:I124
 134           [(FETCHOP:I124 (mem:I124 (match_dup 1))
 135              (match_operand:I124 2 "register_operand" "u"))]
 136           UNSPEC_ATOMIC))
 137    (clobber (match_scratch:I124 3 "=&u"))
 138    (clobber (reg:SI R0_REG))
 139    (clobber (reg:SI R1_REG))]
 140   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 141   "*
 142 {
 143   return \"\\
 144 mova\\t1f, r0\\n\\
 145 \\tmov\\tr15, r1\\n\\
 146 \\tmov\\t#(0f-1f), r15\\n\\
 147 0:\\tmov.<i124suffix>\\t@%1, %0\\n\\
 148 \\tmov\\t%0, %3\\n\\
 149 \\t<fetchop_insn>\\t%2, %3\\n\\
 150 \\tmov.<i124suffix>\\t%3, @%1\\n\\
 151 \\t.align\\t2\\n\\
 152 1:\\tmov\tr1, r15\";
 153 }"
 154   [(set_attr "length" "18")])
 155
 156 (define_expand "atomic_fetch_nand<mode>"
 157   [(set (match_operand:I124 0 "register_operand" "")
 158         (match_operand:I124 1 "memory_operand" ""))
 159    (set (match_dup 1)
 160         (unspec:I124
 161           [(not:I124 (and:I124 (match_dup 1)
 162              (match_operand:I124 2 "register_operand" "")))]
 163           UNSPEC_ATOMIC))
 164    (match_operand:SI 3 "const_int_operand" "")]
 165   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 166 {
 167   rtx addr;
 168
 169   addr = force_reg (Pmode, XEXP (operands[1], 0));
 170   emit_insn (gen_atomic_fetch_nand<mode>_soft
 171              (operands[0], addr, operands[2]));
 172   if (<MODE>mode == QImode)
 173     emit_insn (gen_zero_extendqisi2 (gen_lowpart (SImode, operands[0]),
 174                                      operands[0]));
 175   else if (<MODE>mode == HImode)
 176     emit_insn (gen_zero_extendhisi2 (gen_lowpart (SImode, operands[0]),
 177                                      operands[0]));
 178   DONE;
 179 })
 180
 181 (define_insn "atomic_fetch_nand<mode>_soft"
 182   [(set (match_operand:I124 0 "register_operand" "=&u")
 183         (mem:I124 (match_operand:SI 1 "register_operand" "u")))
 184    (set (mem:I124 (match_dup 1))
 185         (unspec:I124
 186           [(not:I124 (and:I124 (mem:I124 (match_dup 1))
 187              (match_operand:I124 2 "register_operand" "u")))]
 188           UNSPEC_ATOMIC))
 189    (clobber (match_scratch:I124 3 "=&u"))
 190    (clobber (reg:SI R0_REG))
 191    (clobber (reg:SI R1_REG))]
 192   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 193   "*
 194 {
 195   return \"\\
 196 mova\\t1f, r0\\n\\
 197 \\tmov\\tr15, r1\\n\\
 198 \\tmov\\t#(0f-1f), r15\\n\\
 199 0:\\tmov.<i124suffix>\\t@%1, %0\\n\\
 200 \\tmov\\t%2, %3\\n\\
 201 \\tand\\t%0, %3\\n\\
 202 \\tnot\\t%3, %3\\n\\
 203 \\tmov.<i124suffix>\\t%3, @%1\\n\\
 204 \\t.align\\t2\\n\\
 205 1:\\tmov\tr1, r15\";
 206 }"
 207   [(set_attr "length" "20")])
 208
 209 (define_expand "atomic_<fetchop_name>_fetch<mode>"
 210   [(set (match_operand:I124 0 "register_operand" "")
 211         (FETCHOP:I124
 212           (match_operand:I124 1 "memory_operand" "")
 213           (match_operand:I124 2 "register_operand" "")))
 214    (set (match_dup 1)
 215         (unspec:I124
 216           [(FETCHOP:I124 (match_dup 1) (match_dup 2))]
 217           UNSPEC_ATOMIC))
 218    (match_operand:SI 3 "const_int_operand" "")]
 219   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 220 {
 221   rtx addr;
 222
 223   addr = force_reg (Pmode, XEXP (operands[1], 0));
 224   emit_insn (gen_atomic_<fetchop_name>_fetch<mode>_soft
 225              (operands[0], addr, operands[2]));
 226   if (<MODE>mode == QImode)
 227     emit_insn (gen_zero_extendqisi2 (gen_lowpart (SImode, operands[0]),
 228                                      operands[0]));
 229   else if (<MODE>mode == HImode)
 230     emit_insn (gen_zero_extendhisi2 (gen_lowpart (SImode, operands[0]),
 231                                      operands[0]));
 232   DONE;
 233 })
 234
 235 (define_insn "atomic_<fetchop_name>_fetch<mode>_soft"
 236   [(set (match_operand:I124 0 "register_operand" "=&u")
 237         (FETCHOP:I124
 238           (mem:I124 (match_operand:SI 1 "register_operand" "u"))
 239           (match_operand:I124 2 "register_operand" "u")))
 240    (set (mem:I124 (match_dup 1))
 241         (unspec:I124
 242           [(FETCHOP:I124 (mem:I124 (match_dup 1)) (match_dup 2))]
 243           UNSPEC_ATOMIC))
 244    (clobber (reg:SI R0_REG))
 245    (clobber (reg:SI R1_REG))]
 246   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 247   "*
 248 {
 249   return \"\\
 250 mova\\t1f, r0\\n\\
 251 \\tmov\\tr15, r1\\n\\
 252 \\tmov\\t#(0f-1f), r15\\n\\
 253 0:\\tmov.<i124suffix>\\t@%1, %0\\n\\
 254 \\t<fetchop_insn>\\t%2, %0\\n\\
 255 \\tmov.<i124suffix>\\t%0, @%1\\n\\
 256 \\t.align\\t2\\n\\
 257 1:\\tmov\tr1, r15\";
 258 }"
 259   [(set_attr "length" "16")])
 260
 261 (define_expand "atomic_nand_fetch<mode>"
 262   [(set (match_operand:I124 0 "register_operand" "")
 263         (not:I124 (and:I124
 264           (match_operand:I124 1 "memory_operand" "")
 265           (match_operand:I124 2 "register_operand" ""))))
 266    (set (match_dup 1)
 267         (unspec:I124
 268           [(not:I124 (and:I124 (match_dup 1) (match_dup 2)))]
 269           UNSPEC_ATOMIC))
 270    (match_operand:SI 3 "const_int_operand" "")]
 271   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 272 {
 273   rtx addr;
 274
 275   addr = force_reg (Pmode, XEXP (operands[1], 0));
 276   emit_insn (gen_atomic_nand_fetch<mode>_soft
 277              (operands[0], addr, operands[2]));
 278   if (<MODE>mode == QImode)
 279     emit_insn (gen_zero_extendqisi2 (gen_lowpart (SImode, operands[0]),
 280                                      operands[0]));
 281   else if (<MODE>mode == HImode)
 282     emit_insn (gen_zero_extendhisi2 (gen_lowpart (SImode, operands[0]),
 283                                      operands[0]));
 284   DONE;
 285 })
 286
 287 (define_insn "atomic_nand_fetch<mode>_soft"
 288   [(set (match_operand:I124 0 "register_operand" "=&u")
 289         (not:I124 (and:I124
 290           (mem:I124 (match_operand:SI 1 "register_operand" "u"))
 291           (match_operand:I124 2 "register_operand" "u"))))
 292    (set (mem:I124 (match_dup 1))
 293         (unspec:I124
 294           [(not:I124 (and:I124 (mem:I124 (match_dup 1)) (match_dup 2)))]
 295           UNSPEC_ATOMIC))
 296    (clobber (reg:SI R0_REG))
 297    (clobber (reg:SI R1_REG))]
 298   "TARGET_SOFT_ATOMIC && !TARGET_SHMEDIA"
 299   "*
 300 {
 301   return \"\\
 302 mova\\t1f, r0\\n\\
 303 \\tmov\\tr15, r1\\n\\
 304 \\tmov\\t#(0f-1f), r15\\n\\
 305 0:\\tmov.<i124suffix>\\t@%1, %0\\n\\
 306 \\tand\\t%2, %0\\n\\
 307 \\tnot\\t%0, %0\\n\\
 308 \\tmov.<i124suffix>\\t%0, @%1\\n\\
 309 \\t.align\\t2\\n\\
 310 1:\\tmov\tr1, r15\";
 311 }"
 312   [(set_attr "length" "18")])