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https://github.com/matrix-construct/construct
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76 lines
1.8 KiB
C
76 lines
1.8 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) 2016-2022 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_MEM_H
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#if defined(__OPENCL_VERSION__)
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__constant
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struct ircd_simt_mem
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{
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const uint
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local_bank_width, ///< Bytes per bank
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local_banks; ///< Banks per unit
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const uint
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global_bank_width, ///< Bytes per bank
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global_chan_banks, ///< Banks per channel
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global_chans; ///< Channels per device
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}
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ircd_simt_mem = //TODO: XXX get values better
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{
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.local_bank_width = 4,
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.local_banks = 32,
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.global_bank_width = 256,
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#if defined(__AMDDNA__)
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.global_chan_banks = 4,
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#else
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.global_chan_banks = 1,
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#endif
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#if defined(__AMDDNA__)
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.global_chans = 64,
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#elif defined(__AMDGCN__)
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.global_chans = 12,
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#elif defined(__R600__)
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.global_chans = 8,
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#else
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.global_chans = 1,
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#endif
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};
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#endif
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#if defined(__OPENCL_VERSION__)
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/// Given a global pointer, determines the memory channel and bank within that
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/// channel returned as a ushort2: [0] = channel, [1] = bank.
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static ushort2
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ircd_simt_mem_chan_bank(__global const void *const ptr)
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{
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const uint
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global_chan_width = ircd_simt_mem.global_chan_banks * ircd_simt_mem.global_bank_width,
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global_cache_width = ircd_simt_mem.global_chans * global_chan_width;
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const uintptr_t
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uptr = (uintptr_t)ptr,
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cb = uptr % global_cache_width;
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const ushort
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chan = cb / global_chan_width,
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coff = cb % global_chan_width,
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bank = coff / ircd_simt_mem.global_bank_width;
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return (ushort2)
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{
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chan, bank
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};
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}
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#endif
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