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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-01-10 18:00:54 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-02-06 16:19:35 -0300
commit350d8d13661a863e6b189f02d876fa265fe71302 (patch)
treee0db50d920d3edecd1becd9b65c7be91810609d0 /sysdeps
parent00cb84dde75f44847aab094aa3779cc5d222c7e4 (diff)
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string: Improve generic strlen
New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_zero macro. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powercp64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/s390/strlen-c.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/sysdeps/s390/strlen-c.c b/sysdeps/s390/strlen-c.c
index b829ef2..0a33a6f 100644
--- a/sysdeps/s390/strlen-c.c
+++ b/sysdeps/s390/strlen-c.c
@@ -21,12 +21,14 @@
#if HAVE_STRLEN_C
# if HAVE_STRLEN_IFUNC
# define STRLEN STRLEN_C
+# endif
+
+# include <string/strlen.c>
+
+# if HAVE_STRLEN_IFUNC
# if defined SHARED && IS_IN (libc)
-# undef libc_hidden_builtin_def
-# define libc_hidden_builtin_def(name) \
- __hidden_ver1 (__strlen_c, __GI_strlen, __strlen_c);
+__hidden_ver1 (__strlen_c, __GI_strlen, __strlen_c);
# endif
# endif
-# include <string/strlen.c>
#endif