gcc/brig/brigfrontend/brig-lane-inst-handler.cc

   1 /* brig-lane-inst-handler.cc -- brig lane instruction handling
   2    Copyright (C) 2016-2018 Free Software Foundation, Inc.
   3    Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
   4    for General Processor Tech.
   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
  22 #include "brig-code-entry-handler.h"
  23 #include "errors.h"
  24 #include "diagnostic-core.h"
  25 #include "brig-util.h"
  26
  27 brig_lane_inst_handler::brig_lane_inst_handler (brig_to_generic &parent)
  28   : brig_code_entry_handler (parent)
  29 {
  30 }
  31
  32 size_t
  33 brig_lane_inst_handler::operator () (const BrigBase *base)
  34 {
  35   const BrigInstLane &inst = *(const BrigInstLane *) base;
  36   tree_stl_vec operands = build_operands (inst.base);
  37
  38   tree expr = NULL_TREE;
  39   if (inst.base.opcode == BRIG_OPCODE_ACTIVELANECOUNT)
  40     {
  41       /* Because we are fixed to single WI per wave, it's enough to
  42          just check the src value of the single work item itself.  */
  43       expr = build2 (NE_EXPR, uint32_type_node,
  44                      build_zero_cst (uint32_type_node), operands[1]);
  45     }
  46   else if (inst.base.opcode == BRIG_OPCODE_ACTIVELANEID)
  47     {
  48       expr = build_zero_cst (uint32_type_node);
  49     }
  50   else if (inst.base.opcode == BRIG_OPCODE_ACTIVELANEMASK)
  51     {
  52       tree u64_type = gccbrig_tree_type_for_hsa_type (BRIG_TYPE_U64);
  53       tree zero_cst = build_zero_cst (u64_type);
  54       expr = build2 (NE_EXPR, u64_type, zero_cst, operands[1]);
  55
  56       tree_stl_vec elements;
  57       elements.push_back (expr);
  58       elements.push_back (zero_cst);
  59       elements.push_back (zero_cst);
  60       elements.push_back (zero_cst);
  61
  62       expr = m_parent.m_cf->pack (elements);
  63     }
  64   else if (inst.base.opcode == BRIG_OPCODE_ACTIVELANEPERMUTE)
  65     {
  66       tree src = operands[1];
  67       tree identity = operands[3];
  68       tree use_identity = operands[4];
  69
  70       /* When WAVESIZE is 1, we either select the src of the work-item
  71          itself or 'identity' in case use_identity is 1.  */
  72
  73       tree cmp = build2 (EQ_EXPR, uint32_type_node,
  74                          build_int_cstu (TREE_TYPE (use_identity), 1),
  75                          use_identity);
  76
  77       expr = build3 (COND_EXPR, TREE_TYPE (src), cmp, identity, src);
  78     }
  79   else
  80     gcc_unreachable ();
  81
  82   build_output_assignment (inst.base, operands[0], expr);
  83
  84   return base->byteCount;
  85 }