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7ec8eb5676
It improves latency for about 3-6% and throughput for about 5-12%. Tested on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Copyright (C) 2011-2025 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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/*
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* wrapper atan2f(y,x)
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*/
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#include <errno.h>
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#include <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-float.h>
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#if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_43)
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float
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__atan2_compatf (float y, float x)
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{
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float z;
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if (__builtin_expect (x == 0.0f && y == 0.0f, 0) && _LIB_VERSION == _SVID_)
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return __kernel_standard_f (y, x, 103); /* atan2(+-0,+-0) */
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z = __ieee754_atan2f (y, x);
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if (__glibc_unlikely (z == 0.0f && y != 0.0f && isfinite (x)))
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__set_errno (ERANGE);
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return z;
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}
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# ifdef NO_COMPAT_NEEDED
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strong_alias (__atan2_compatf, __atan2f)
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libm_alias_float (__atan2_compat, atan2)
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# else
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compat_symbol (libm, __atan2_compatf, atan2f, GLIBC_2_0);
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# endif
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#endif
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