/*
 * Copyright (c) 2013      Mellanox Technologies, Inc.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */

#include "oshmem_config.h"
#include <stdio.h>
#include <stdlib.h>

#include "oshmem/constants.h"
#include "oshmem/mca/atomic/atomic.h"
#include "oshmem/mca/atomic/base/base.h"

#include "atomic_ucx.h"

int mca_atomic_ucx_fadd(void *target,
                        void *prev,
                        const void *value,
                        size_t nlong,
                        int pe,
                        struct oshmem_op_t *op)
{
    ucs_status_t status;
    spml_ucx_mkey_t *ucx_mkey;
    uint64_t rva;

    ucx_mkey = mca_spml_ucx_get_mkey(pe, target, (void *)&rva, mca_spml_self);
    if (NULL == prev) {
        switch (nlong) {
            case 4:
                status = ucp_atomic_add32(mca_spml_self->ucp_peers[pe].ucp_conn, 
                        *(uint32_t *)value, rva, ucx_mkey->rkey);
                break;
            case 8:
                status = ucp_atomic_add64(mca_spml_self->ucp_peers[pe].ucp_conn, 
                        *(uint64_t *)value, rva, ucx_mkey->rkey);
                break;
            default:
                goto err_size;
        }
    }
    else {
        switch (nlong) {
            case 4:
                status = ucp_atomic_fadd32(mca_spml_self->ucp_peers[pe].ucp_conn, 
                        *(uint32_t *)value, rva, ucx_mkey->rkey, prev);
                break;
            case 8:
                status = ucp_atomic_fadd64(mca_spml_self->ucp_peers[pe].ucp_conn, 
                        *(uint64_t *)value, rva, ucx_mkey->rkey, prev);
                break;
            default:
                goto err_size;
        }
    }

    return ucx_status_to_oshmem(status);

err_size:
    ATOMIC_ERROR("[#%d] Type size must be 1/2/4 or 8 bytes.", my_pe);
    return OSHMEM_ERROR;
}
