[PATCH 3/3] powerpc: Use default st{r,p}cpy optimization for POWER7

[Andreas Schwab]

On Jul 29 2015, Adhemerval Zanella <adhemerval.zanella@linaro.org> wrote:

> diff --git a/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c
> new file mode 100644
> index 0000000..6e437fb
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c
> @@ -0,0 +1,39 @@
> +/* Multiarch stpcpy for PPC64.
> +   Copyright (C) 2015 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
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <string.h>
> +
> +extern __typeof (memcpy) __memcpy_ppc attribute_hidden;
> +extern __typeof (strlen) __strlen_ppc attribute_hidden;
> +extern __typeof (stpcpy) __stpcpy_ppc attribute_hidden;
> +
> +#define STPCPY __stpcpy_ppc
> +#define memcpy __memcpy_ppc
> +#define strlen __strlen_ppc
> +
> +#undef weak_alias
> +#define weak_alias(name, aliasname) \
> +  extern __typeof (__stpcpy_ppc) aliasname \
> +    __attribute__ ((weak, alias ("__stpcpy_ppc")));

This creates a __GI_stpcpy alias that clashes with the IFUNC symbol in
stpcpy.os.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."