glibc/sysdeps/x86_64/wcscpy-generic.c
Noah Goldstein 192979ee35 x86: Add support to build wcscpy with explicit ISA level
1. Add ISA level build guards to different implementations.
    - wcscpy-ssse3.S is used as ISA level 2/3/4.
    - wcscpy-generic.c is only used at ISA level 1 and will
      only build if compiled with ISA level == 1. Otherwise
      there is no reason to include it as we will always use
      wcscpy-ssse3.S

2. Refactor the ifunc selector and ifunc implementation list to use
   the ISA level aware wrapper macros that allow functions below the
   compiled ISA level (with a guranteed replacement) to be skipped.

Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}

And m32 with and without multiarch.
2022-07-16 03:07:59 -07:00

32 lines
1.2 KiB
C

/* wcscpy dispatch for RTLD and non-multiarch .c ISA level 1 build.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* wcscpy non-multiarch build is split into two files,
wcscpy-generic.c and wcscpy.S. The wcscpy-generic.c build is for
ISA level <= 1 and just uses wcsmbs/wcscpy.c. This must be split
into two files because we cannot include C code from assembly or
vice versa. */
#include <isa-level.h>
#if MINIMUM_X86_ISA_LEVEL <= 1
# include "wcsmbs/wcscpy.c"
#endif