1/* FMA version of fmaf.
2 Copyright (C) 2009-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#define NO_MATH_REDIRECT
20#include <config.h>
21#include <math.h>
22#include <init-arch.h>
23#include <libm-alias-float.h>
24
25extern float __fmaf_sse2 (float x, float y, float z) attribute_hidden;
26
27
28static float
29__fmaf_fma3 (float x, float y, float z)
30{
31 asm ("vfmadd213ss %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z));
32 return x;
33}
34
35
36static float
37__fmaf_fma4 (float x, float y, float z)
38{
39 asm ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
40 return x;
41}
42
43
44libm_ifunc (__fmaf, CPU_FEATURE_USABLE (FMA)
45 ? __fmaf_fma3 : (CPU_FEATURE_USABLE (FMA4)
46 ? __fmaf_fma4 : __fmaf_sse2));
47libm_alias_float (__fma, fma)
48
49#define __fmaf __fmaf_sse2
50
51#include <sysdeps/ieee754/dbl-64/s_fmaf.c>
52

source code of glibc/sysdeps/x86_64/fpu/multiarch/s_fmaf.c