1 /* FMA version of fma.
2 Copyright (C) 2009-2022 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 #define dfmal __hide_dfmal
22 #define f32xfmaf64 __hide_f32xfmaf64
23 #include <math.h>
24 #undef dfmal
25 #undef f32xfmaf64
26 #include <init-arch.h>
27 #include <libm-alias-double.h>
28 #include <math-narrow-alias.h>
29
30 extern double __fma_sse2 (double x, double y, double z) attribute_hidden;
31
32
33 static double
__fma_fma3(double x,double y,double z)34 __fma_fma3 (double x, double y, double z)
35 {
36 asm ("vfmadd213sd %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z));
37 return x;
38 }
39
40
41 static double
__fma_fma4(double x,double y,double z)42 __fma_fma4 (double x, double y, double z)
43 {
44 asm ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
45 return x;
46 }
47
48
49 libm_ifunc (__fma, CPU_FEATURE_USABLE (FMA)
50 ? __fma_fma3 : (CPU_FEATURE_USABLE (FMA4)
51 ? __fma_fma4 : __fma_sse2));
52 libm_alias_double (__fma, fma)
53 libm_alias_double_narrow (__fma, fma)
54
55 #define __fma __fma_sse2
56
57 #include <sysdeps/ieee754/dbl-64/s_fma.c>
58