Blame sysdeps/x86_64/fpu/multiarch/s_fma.c

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/* FMA version of fma.
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   Copyright (C) 2009-2018 Free Software Foundation, Inc.
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   Contributed by Intel Corporation.
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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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   <http://www.gnu.org/licenses/>.  */
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#include <config.h>
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#include <math.h>
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#include <init-arch.h>
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#include <libm-alias-double.h>
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extern double __fma_sse2 (double x, double y, double z) attribute_hidden;
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static double
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__fma_fma3 (double x, double y, double z)
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{
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  asm ("vfmadd213sd %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z));
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  return x;
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}
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static double
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__fma_fma4 (double x, double y, double z)
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{
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  asm ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
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  return x;
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}
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libm_ifunc (__fma, HAS_ARCH_FEATURE (FMA_Usable)
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	    ? __fma_fma3 : (HAS_ARCH_FEATURE (FMA4_Usable)
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			    ? __fma_fma4 : __fma_sse2));
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libm_alias_double (__fma, fma)
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#define __fma __fma_sse2
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#include <sysdeps/ieee754/dbl-64/s_fma.c>