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/* brig-atomic-inst-handler.cc -- brig atomic instruction handling
Copyright (C) 2016-2019 Free Software Foundation, Inc.
Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
for General Processor Tech.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include <sstream>
#include "brig-code-entry-handler.h"
#include "brig-util.h"
#include "fold-const.h"
#include "diagnostic.h"
#include "tree-pretty-print.h"
#include "print-tree.h"
#include "convert.h"
#include "langhooks.h"
#include "gimple-expr.h"
#include "stringpool.h"
#include "brig-builtins.h"
brig_atomic_inst_handler::brig_atomic_inst_handler (brig_to_generic &parent)
: brig_code_entry_handler (parent)
{
}
size_t
brig_atomic_inst_handler::generate_tree (const BrigInstBase &inst,
BrigAtomicOperation8_t atomic_opcode)
{
tree_stl_vec operands = build_operands (inst);
const int first_input
= gccbrig_hsa_opcode_op_output_p (inst.opcode, 0) ? 1 : 0;
tree instr_type = gccbrig_tree_type_for_hsa_type (inst.type);
/* Utilize the atomic data types (from C++11 support) for implementing
atomic operations. */
tree atomic_type = build_qualified_type (instr_type, TYPE_QUAL_ATOMIC);
gcc_assert (atomic_type != NULL_TREE);
tree signal_handle = operands[first_input];
tree atomic_ptype = build_pointer_type (atomic_type);
tree casted_to_ptr = convert_to_pointer (atomic_ptype, signal_handle);
tree src0 = NULL_TREE;
if (atomic_opcode != BRIG_ATOMIC_LD)
src0 = operands[first_input + 1];
tree instr_expr = NULL_TREE;
tree ptype = build_pointer_type (instr_type);
tree ptr = convert_to_pointer (ptype, operands[first_input]);
if (atomic_opcode == BRIG_ATOMIC_ST)
{
tree mem_ref = build2 (MEM_REF, atomic_type, casted_to_ptr,
build_int_cst (atomic_ptype, 0));
instr_expr = build2 (MODIFY_EXPR, atomic_type, mem_ref, src0);
}
else if (atomic_opcode == BRIG_ATOMIC_LD
|| (atomic_opcode >= BRIG_ATOMIC_WAIT_EQ
&& atomic_opcode <= BRIG_ATOMIC_WAITTIMEOUT_GTE))
{
tree mem_ref = build2 (MEM_REF, atomic_type, casted_to_ptr,
build_int_cst (atomic_ptype, 0));
/* signal_wait* instructions can return spuriously before the
condition becomes true. Therefore it's legal to return
right away. TODO: builtin calls which can be
implemented with a power efficient sleep-wait. */
instr_expr = mem_ref;
}
else if (atomic_opcode == BRIG_ATOMIC_CAS)
{
/* Special case for CAS due to the two args. */
tree built_in = NULL_TREE;
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_8);
break;
default:
gcc_unreachable ();
}
tree src1 = operands[first_input + 2];
tree src0_type
= TREE_VALUE (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (built_in))));
tree src1_type = TREE_VALUE
(TREE_CHAIN (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (built_in)))));
instr_expr = call_builtin (built_in, 3, instr_type, ptype, ptr,
src0_type, src0, src1_type, src1);
}
else
{
tree built_in = NULL_TREE;
/* The rest of the builtins have the same number of parameters.
Generate a big if..else that finds the correct builtin
automagically from the def file. */
#undef DEF_HSAIL_SAT_BUILTIN
#undef DEF_HSAIL_BUILTIN
#undef DEF_HSAIL_ATOMIC_BUILTIN
#undef DEF_HSAIL_INTR_BUILTIN
#undef DEF_HSAIL_CVT_ZEROI_SAT_BUILTIN
#define DEF_HSAIL_ATOMIC_BUILTIN(ENUM, ATOMIC_OPCODE, HSAIL_TYPE, \
NAME, TYPE, ATTRS) \
if (atomic_opcode == ATOMIC_OPCODE && inst.type == HSAIL_TYPE) \
built_in = builtin_decl_explicit (ENUM); \
else
#include "brig-builtins.def"
switch (atomic_opcode)
{
case BRIG_ATOMIC_ADD:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_ADD_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_ADD_8);
break;
default:
gcc_unreachable ();
}
break;
case BRIG_ATOMIC_SUB:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_SUB_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_SUB_8);
break;
default:
gcc_unreachable ();
}
break;
case BRIG_ATOMIC_AND:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_AND_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_AND_8);
break;
default:
gcc_unreachable ();
}
break;
case BRIG_ATOMIC_XOR:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_XOR_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_XOR_8);
break;
default:
gcc_unreachable ();
}
break;
case BRIG_ATOMIC_OR:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_OR_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_FETCH_AND_OR_8);
break;
default:
gcc_unreachable ();
}
break;
case BRIG_ATOMIC_EXCH:
switch (gccbrig_hsa_type_bit_size (inst.type))
{
case 32:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_LOCK_TEST_AND_SET_4);
break;
case 64:
built_in
= builtin_decl_explicit (BUILT_IN_SYNC_LOCK_TEST_AND_SET_8);
break;
default:
gcc_unreachable ();
}
break;
default:
gcc_unreachable ();
};
gcc_assert (built_in != NULL_TREE);
tree arg0_type
= TREE_VALUE (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (built_in))));
instr_expr = call_builtin (built_in, 2, instr_type, ptr_type_node,
ptr, arg0_type, src0);
/* We need a temp variable for the result, because otherwise
the gimplifier drops a necessary (unsigned to signed) cast in
the output assignment and fails a check later. */
tree tmp_var = create_tmp_var (arg0_type, "builtin_out");
tree tmp_assign
= build2 (MODIFY_EXPR, TREE_TYPE (tmp_var), tmp_var, instr_expr);
m_parent.m_cf->append_statement (tmp_assign);
instr_expr = tmp_var;
}
if (first_input > 0)
build_output_assignment (inst, operands[0], instr_expr);
else
m_parent.m_cf->append_statement (instr_expr);
return inst.base.byteCount;
}
size_t
brig_atomic_inst_handler::operator () (const BrigBase *base)
{
const BrigInstAtomic *inst = (const BrigInstAtomic *) base;
BrigAtomicOperation8_t atomic_opcode;
atomic_opcode = inst->atomicOperation;
return generate_tree (inst->base, atomic_opcode);
}
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