1 /* brig-lane-inst-handler.cc -- brig lane instruction handling
2 Copyright (C) 2016-2020 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
brig_lane_inst_handler(brig_to_generic & parent)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
operator ()(const BrigBase * base)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 }
86