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wcsmbs: optimize wcscat

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This patch rewrites wcscat using wcslen and wcscpy.  This is similar to
the optimization done on strcat by 6e46de42fe.

The strcpy changes are mainly to add the internal alias to avoid PLT
calls.

Checked on x86_64-linux-gnu and a build against the affected
architectures.

	* include/wchar.h (__wcscpy): New prototype.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy-ppc32.c
	(__wcscpy): Route internal symbol to generic implementation.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c (wcscpy):
	Add internal __wcscpy alias.
	* sysdeps/powerpc/powerpc64/multiarch/wcscpy.c (wcscpy): Likewise.
	* sysdeps/s390/wcscpy.c (wcscpy): Likewise.
	* sysdeps/x86_64/multiarch/wcscpy.c (wcscpy): Likewise.
	* wcsmbs/wcscpy.c (wcscpy): Add
	* sysdeps/x86_64/multiarch/wcscpy-c.c (WCSCPY): Adjust macro to
	use generic implementation.
	* wcsmbs/wcscat.c (wcscat): Rewrite using wcslen and wcscpy.
This commit is contained in:
Adhemerval Zanella
2019-02-05 17:35:12 -02:00
parent 39ef074419
commit 81a1443941
10 changed files with 67 additions and 58 deletions
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4
sysdeps/s390/wcscpy.c
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@ -30,9 +30,11 @@ extern __typeof (wcscpy) WCSCPY_C attribute_hidden;
extern __typeof (wcscpy) WCSCPY_Z13 attribute_hidden;
# endif
s390_libc_ifunc_expr (wcscpy, wcscpy,
s390_libc_ifunc_expr (wcscpy, __wcscpy,
(HAVE_WCSCPY_Z13 && (hwcap & HWCAP_S390_VX))
? WCSCPY_Z13
: WCSCPY_DEFAULT
)
weak_alias (__wcscpy, wcscpy)
libc_hidden_def (__wcscpy)
#endif