powerpc: Add optimized version of [l]lrintf
[glibc.git] / sysdeps / powerpc / powerpc64 / fpu / multiarch / s_llrintf.c
blob330fe965a6ae0b8d7a8140ba11cc70e2446abf4a
1 /* Multiple versions of llrintf.
2 Copyright (C) 2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
18 /* Redefine lrintf/__lrintf so that the compiler won't complain about the type
19 mismatch with the IFUNC selector in strong_alias below. */
20 #define lrintf __hidden_lrintf
21 #define __lrintf __hidden___lrintf
23 #include <math.h>
24 #undef lrintf
25 #undef __lrintf
26 #include "init-arch.h"
28 extern __typeof (__llrintf) __llrint_ppc64 attribute_hidden;
29 extern __typeof (__llrintf) __llrint_power6x attribute_hidden;
30 extern __typeof (__llrintf) __llrint_power8 attribute_hidden;
32 /* The ppc64 ABI passes float and double parameters in 64bit floating point
33 registers (at least up to a point) as IEEE binary64 format, so effectively
34 of "double" type. Both l[l]rint and l[l]rintf return long type. So these
35 functions have identical signatures and functionality, and can use a
36 single implementation. */
37 libc_ifunc (__llrintf,
38 (hwcap2 & PPC_FEATURE2_ARCH_2_07)
39 ? __llrint_power8 :
40 (hwcap & PPC_FEATURE_POWER6_EXT)
41 ? __llrint_power6x
42 : __llrint_ppc64);
44 weak_alias (__llrintf, llrintf)
45 strong_alias (__llrintf, __lrintf)
46 weak_alias (__lrintf, lrintf)