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7fe0ace3e2
Use a more optimized comparison for check for NaN and infinite and
add an inlined issignaling implementation for float. With gcc it
results in 2 FP comparisons.
The file Copyright is also changed to use GPL, the implementation was
completely changed by 7c10fd3515 to use double precision instead of
scaling and this change removes all the GET_FLOAT_WORD usage.
Checked on x86_64-linux-gnu.
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* Euclidean distance function. Float/Binary32 version.
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Copyright (C) 2012-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <libm-alias-finite.h>
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#include <math.h>
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#include <math-narrow-eval.h>
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#include <math_private.h>
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float
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__ieee754_hypotf (float x, float y)
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{
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if (!isfinite (x) || !isfinite (y))
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{
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if ((isinf (x) || isinf (y))
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&& !issignaling (x) && !issignaling (y))
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return INFINITY;
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return x + y;
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}
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return math_narrow_eval ((float) sqrt ((double) x * (double) x
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+ (double) y * (double) y));
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}
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#ifndef __ieee754_hypotf
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libm_alias_finite (__ieee754_hypotf, __hypotf)
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#endif
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