mirror of
https://github.com/matrix-construct/construct
synced 2024-09-18 22:48:52 +02:00
29 lines
921 B
C
29 lines
921 B
C
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2021 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
/// Find the greatest value in the buffer. All threads in the group participate;
|
|
/// the greatest value is placed in index [0], the rest of the buffer is
|
|
/// trashed.
|
|
inline void
|
|
ircd_simt_reduce_max_flldr(__local float *const buf)
|
|
{
|
|
const uint
|
|
li = get_local_id(0),
|
|
ln = get_local_size(0);
|
|
|
|
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
|
|
{
|
|
barrier(CLK_LOCAL_MEM_FENCE);
|
|
|
|
if(li < stride)
|
|
if(buf[li] < buf[li + stride])
|
|
buf[li] = buf[li + stride];
|
|
}
|
|
}
|