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| author | Simon Glass <sjg@chromium.org> | 2017-04-02 09:50:28 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-04-04 20:01:57 -0600 |
| commit | ab4458bdb5074ababe09f2538cb9f25901121ebb (patch) | |
| tree | a995262be8e740ca6964852434e81c599e753be7 /lib/string.c | |
| parent | 3c00a2c8b5e22e3eff9afb291e555b4bcba17d77 (diff) | |
| download | u-boot-ab4458bdb5074ababe09f2538cb9f25901121ebb.zip u-boot-ab4458bdb5074ababe09f2538cb9f25901121ebb.tar.gz u-boot-ab4458bdb5074ababe09f2538cb9f25901121ebb.tar.bz2 | |
string: Provide a slimmed-down memset()
Most of the time the optimised memset() is what we want. For extreme
situations such as TPL it may be too large. For example on the 'rock'
board, using a simple loop saves a useful 48 bytes. With gcc 4.9 and
the rodata bug, this patch is enough to reduce the TPL image below the
limit.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'lib/string.c')
| -rw-r--r-- | lib/string.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/string.c b/lib/string.c index 67d5f6a..c1a28c1 100644 --- a/lib/string.c +++ b/lib/string.c @@ -437,8 +437,10 @@ char *strswab(const char *s) void * memset(void * s,int c,size_t count) { unsigned long *sl = (unsigned long *) s; - unsigned long cl = 0; char *s8; + +#if !CONFIG_IS_ENABLED(TINY_MEMSET) + unsigned long cl = 0; int i; /* do it one word at a time (32 bits or 64 bits) while possible */ @@ -452,7 +454,7 @@ void * memset(void * s,int c,size_t count) count -= sizeof(*sl); } } - /* fill 8 bits at a time */ +#endif /* fill 8 bits at a time */ s8 = (char *)sl; while (count--) *s8++ = c; |