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/* Copyright (C) 2017-2023 Free Software Foundation, Inc.
Contributed by Mentor Embedded.
This file is part of the GNU Offloading and Multi Processing Library
(libgomp).
Libgomp 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.
Libgomp 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgomp.h"
#include "libgomp-gcn.h"
#include <limits.h>
extern volatile struct gomp_offload_icvs GOMP_ADDITIONAL_ICVS;
bool
GOMP_teams4 (unsigned int num_teams_lower, unsigned int num_teams_upper,
unsigned int thread_limit, bool first)
{
if (!first)
return false;
if (thread_limit)
{
struct gomp_task_icv *icv = gomp_icv (true);
icv->thread_limit_var
= thread_limit > INT_MAX ? UINT_MAX : thread_limit;
}
unsigned int num_workgroups, workgroup_id;
num_workgroups = __builtin_gcn_dim_size (0);
workgroup_id = __builtin_gcn_dim_pos (0);
/* FIXME: If num_teams_lower > num_workgroups, we want to loop
multiple times at least for some workgroups. */
(void) num_teams_lower;
if (!num_teams_upper || num_teams_upper >= num_workgroups)
num_teams_upper = num_workgroups;
else if (workgroup_id >= num_teams_upper)
return false;
gomp_num_teams_var = num_teams_upper - 1;
return true;
}
int
omp_pause_resource (omp_pause_resource_t kind, int device_num)
{
(void) kind;
(void) device_num;
return -1;
}
int
omp_pause_resource_all (omp_pause_resource_t kind)
{
(void) kind;
return -1;
}
ialias (omp_pause_resource)
ialias (omp_pause_resource_all)
void
GOMP_target_ext (int device, void (*fn) (void *), size_t mapnum,
void **hostaddrs, size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend, void **args)
{
(void) flags;
(void) depend;
(void) args;
if (device != GOMP_DEVICE_HOST_FALLBACK || fn == NULL)
return;
/* The output data is at ((void*) kernargs)[2]. */
register void **kernargs = (void**) __builtin_gcn_kernarg_ptr ();
struct output *data = (struct output *) kernargs[2];
/* Reserve one slot. */
unsigned int index = __atomic_fetch_add (&data->next_output, 1,
__ATOMIC_ACQUIRE);
if ((unsigned int) (index + 1) < data->consumed)
abort (); /* Overflow. */
/* Spinlock while the host catches up. */
if (index >= 1024)
while (__atomic_load_n (&data->consumed, __ATOMIC_ACQUIRE)
<= (index - 1024))
asm ("s_sleep 64");
unsigned int slot = index % 1024;
data->queue[slot].value_u64[0] = (uint64_t) fn;
data->queue[slot].value_u64[1] = (uint64_t) mapnum;
data->queue[slot].value_u64[2] = (uint64_t) hostaddrs;
data->queue[slot].value_u64[3] = (uint64_t) sizes;
data->queue[slot].value_u64[4] = (uint64_t) kinds;
data->queue[slot].value_u64[5] = (uint64_t) GOMP_ADDITIONAL_ICVS.device_num;
data->queue[slot].type = 4; /* Reverse offload. */
__atomic_store_n (&data->queue[slot].written, 1, __ATOMIC_RELEASE);
/* Spinlock while the host catches up. */
while (__atomic_load_n (&data->queue[slot].written, __ATOMIC_ACQUIRE) != 0)
asm ("s_sleep 64");
}
void
GOMP_target_data_ext (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds)
{
(void) device;
(void) mapnum;
(void) hostaddrs;
(void) sizes;
(void) kinds;
__builtin_unreachable ();
}
void
GOMP_target_end_data (void)
{
__builtin_unreachable ();
}
void
GOMP_target_update_ext (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend)
{
(void) device;
(void) mapnum;
(void) hostaddrs;
(void) sizes;
(void) kinds;
(void) flags;
(void) depend;
__builtin_unreachable ();
}
void
GOMP_target_enter_exit_data (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend)
{
(void) device;
(void) mapnum;
(void) hostaddrs;
(void) sizes;
(void) kinds;
(void) flags;
(void) depend;
__builtin_unreachable ();
}
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