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