target/hexagon/iclass.c

   1 /*
   2  *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "iclass.h"
  20
  21 static const SlotMask iclass_info[] = {
  22
  23 #define DEF_PP_ICLASS32(TYPE, SLOTS, UNITS) \
  24     [ICLASS_FROM_TYPE(TYPE)] = SLOTS_##SLOTS,
  25 #define DEF_EE_ICLASS32(TYPE, SLOTS, UNITS) \
  26     [ICLASS_FROM_TYPE(TYPE)] = SLOTS_##SLOTS,
  27 #include "imported/iclass.def"
  28 #undef DEF_PP_ICLASS32
  29 #undef DEF_EE_ICLASS32
  30 };
  31
  32 SlotMask find_iclass_slots(Opcode opcode, int itype)
  33 {
  34     /* There are some exceptions to what the iclass dictates */
  35     if (GET_ATTRIB(opcode, A_ICOP)) {
  36         return SLOTS_2;
  37     } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT0ONLY)) {
  38         return SLOTS_0;
  39     } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT1ONLY)) {
  40         return SLOTS_1;
  41     } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT2ONLY)) {
  42         return SLOTS_2;
  43     } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT3ONLY)) {
  44         return SLOTS_3;
  45     } else if (GET_ATTRIB(opcode, A_COF) &&
  46                GET_ATTRIB(opcode, A_INDIRECT) &&
  47                !GET_ATTRIB(opcode, A_MEMLIKE) &&
  48                !GET_ATTRIB(opcode, A_MEMLIKE_PACKET_RULES)) {
  49         return SLOTS_2;
  50     } else if (GET_ATTRIB(opcode, A_RESTRICT_NOSLOT1)) {
  51         return SLOTS_0;
  52     } else if ((opcode == J2_trap0) ||
  53                (opcode == Y2_isync) ||
  54                (opcode == J2_pause) || (opcode == J4_hintjumpr)) {
  55         return SLOTS_2;
  56     } else if (GET_ATTRIB(opcode, A_CRSLOT23)) {
  57         return SLOTS_23;
  58     } else if (GET_ATTRIB(opcode, A_RESTRICT_PREFERSLOT0)) {
  59         return SLOTS_0;
  60     } else if (GET_ATTRIB(opcode, A_SUBINSN)) {
  61         return SLOTS_01;
  62     } else if (GET_ATTRIB(opcode, A_CALL)) {
  63         return SLOTS_23;
  64     } else if ((opcode == J4_jumpseti) || (opcode == J4_jumpsetr)) {
  65         return SLOTS_23;
  66     } else {
  67         return iclass_info[itype];
  68     }
  69 }