mirror of
https://github.com/matrix-construct/construct
synced 2024-11-16 23:10:54 +01:00
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2021 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_SIMT_REDUCE_ADD_H
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#ifdef __OPENCL_VERSION__
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inline bool
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ircd_math_is_pow2(const uint val)
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{
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return val > 0 && (val & (val - 1)) == 0;
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}
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#endif
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#ifdef __OPENCL_VERSION__
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/// Sum all elements in the buffer. All threads in the group participate;
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/// result is placed in index [0], the rest of the buffer is trashed.
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inline void
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ircd_simt_reduce_add_f4lldr(__local float4 *const buf,
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const uint ln,
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const uint li)
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{
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for(uint stride = ln >> 1; stride > 0; stride >>= 1)
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{
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barrier(CLK_LOCAL_MEM_FENCE);
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if(li < stride)
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buf[li] += buf[li + stride];
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}
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if(!ircd_math_is_pow2(ln) && li == 0)
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buf[li] += buf[li + 2];
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}
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#endif
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#ifdef __OPENCL_VERSION__
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/// Sum all elements in the buffer. All threads in the group participate;
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/// result is placed in index [0], the rest of the buffer is trashed.
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inline void
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ircd_simt_reduce_add_flldr(__local float *const buf,
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const uint ln,
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const uint li)
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{
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for(uint stride = ln >> 1; stride > 0; stride >>= 1)
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{
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barrier(CLK_LOCAL_MEM_FENCE);
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if(li < stride)
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buf[li] += buf[li + stride];
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}
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if(!ircd_math_is_pow2(ln) && li == 0)
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buf[li] += buf[li + 2];
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}
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#endif
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#ifdef __OPENCL_VERSION__
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/// Sum all elements in the buffer. All threads in the group participate;
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/// result is placed in index [0], the rest of the buffer is trashed.
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inline void
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ircd_simt_reduce_add_illdr(__local int *const buf,
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const uint ln,
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const uint li)
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{
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if(li > 0)
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atomic_add(buf + 0, buf[li]);
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}
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#endif
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#ifdef __OPENCL_VERSION__
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/// Sum all elements in the buffer. All threads in the group participate;
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/// result is placed in index [0], the rest of the buffer is trashed.
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inline void
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ircd_simt_reduce_add_ulldr(__local uint *const buf,
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const uint ln,
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const uint li)
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{
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if(li > 0)
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atomic_add(buf + 0, buf[li]);
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}
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#endif
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#ifdef __OPENCL_VERSION__
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inline float
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__attribute__((always_inline))
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ircd_simt_reduce_add_f4(const float4 in)
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{
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float ret = 0.0f;
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for(uint i = 0; i < 4; ++i)
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ret += in[i];
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return ret;
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}
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#endif
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