diff options
| author | Jeff Johnston <jjohnstn@redhat.com> | 2013-12-10 22:57:30 +0400 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2013-12-10 22:57:30 +0400 |
| commit | 10e4d79a191f07999bc94b21535fba5d7c04f419 (patch) | |
| tree | dd9f0587036281f112a92162f6d39684c511c89b /newlib/libc/string | |
| parent | a6a307d8c2983656ac207bba6c59b44e13ad377d (diff) | |
2013-12-10 Jeff Johnston <jjohnstn@redhat.com>
* acconfig.h: Add _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL.
* newlib.hin: Ditto.
* configure: Regenerate.
* configure.in: Add setting of _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL.
* libc/string/local.h: Add check for _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
and set __inhibit_loop_to_libcall macro appropriately.
* libc/string/memmove.c: Use __inhibit_loop_to_libcall macro in
function declaration.
* libc/string/memset.c: Ditto.
Diffstat (limited to 'newlib/libc/string')
| -rw-r--r-- | newlib/libc/string/local.h | 15 | ||||
| -rw-r--r-- | newlib/libc/string/memmove.c | 2 | ||||
| -rw-r--r-- | newlib/libc/string/memset.c | 2 |
3 files changed, 19 insertions, 0 deletions
diff --git a/newlib/libc/string/local.h b/newlib/libc/string/local.h index 5d17dccc4..dfe01d70b 100644 --- a/newlib/libc/string/local.h +++ b/newlib/libc/string/local.h @@ -7,3 +7,18 @@ int _EXFUN (__wcwidth, (wint_t)); /* Defined in locale/locale.c. Returns a value != 0 if the current language is assumed to use CJK fonts. */ int __locale_cjk_lang (); + +/* + Taken from glibc: + Add the compiler optimization to inhibit loop transformation to library + calls. This is used to avoid recursive calls in memset and memmove + default implementations. +*/ +#ifdef _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL +# define __inhibit_loop_to_libcall \ + __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) +#else +# define __inhibit_loop_to_libcall +#endif + + diff --git a/newlib/libc/string/memmove.c b/newlib/libc/string/memmove.c index b03bb3821..a037c7c2f 100644 --- a/newlib/libc/string/memmove.c +++ b/newlib/libc/string/memmove.c @@ -39,6 +39,7 @@ QUICKREF #include <_ansi.h> #include <stddef.h> #include <limits.h> +#include "local.h" /* Nonzero if either X or Y is not aligned on a "long" boundary. */ #define UNALIGNED(X, Y) \ @@ -55,6 +56,7 @@ QUICKREF /*SUPPRESS 20*/ _PTR +__inhibit_loop_to_libcall _DEFUN (memmove, (dst_void, src_void, length), _PTR dst_void _AND _CONST _PTR src_void _AND diff --git a/newlib/libc/string/memset.c b/newlib/libc/string/memset.c index 55d2ce180..ee91b056e 100644 --- a/newlib/libc/string/memset.c +++ b/newlib/libc/string/memset.c @@ -34,12 +34,14 @@ QUICKREF */ #include <string.h> +#include "local.h" #define LBLOCKSIZE (sizeof(long)) #define UNALIGNED(X) ((long)X & (LBLOCKSIZE - 1)) #define TOO_SMALL(LEN) ((LEN) < LBLOCKSIZE) _PTR +__inhibit_loop_to_libcall _DEFUN (memset, (m, c, n), _PTR m _AND int c _AND |