mirror of
https://github.com/matrix-construct/construct
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41 lines
1.2 KiB
C
41 lines
1.2 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_NORM_H
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#ifdef __OPENCL_VERSION__
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/// Normalize the input, placing the result in possibly overlapping output.
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/// This procedure requires an additional temporary buffer.
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inline void
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ircd_simt_math_norm_f4lldr(__local float4 *const out,
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__local const float4 *const in,
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__local float4 *const restrict tmp,
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const uint ln,
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const uint li)
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{
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tmp[li] = in[li];
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ircd_simt_math_mean_f4lldr(tmp, ln, li);
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const float4
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sub_mean = in[li] - tmp[li],
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sub_mean_sqr = pow(sub_mean, 2);
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out[li] = sub_mean_sqr;
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ircd_simt_math_mean_f4lldr(out, ln, li);
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const float4
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epsilon = FLT_EPSILON,
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s = native_sqrt(out[li] + epsilon),
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res = sub_mean / s;
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out[li] = res;
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}
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#endif
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