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| author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2007-11-21 17:29:48 +0000 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2007-11-21 17:29:48 +0000 |
| commit | ef03156d712bf652b458c2cfd11090777d924591 (patch) | |
| tree | a3d611e30fd197986aeb4e21e8e71958ddbdc114 /libc/string/generic/memmove.c | |
| parent | f1957ec57dd1667021d7ee4c801f4662c45beb4f (diff) | |
| download | uClibc-alpine-ef03156d712bf652b458c2cfd11090777d924591.tar.bz2 uClibc-alpine-ef03156d712bf652b458c2cfd11090777d924591.tar.xz | |
Added optmized memcpy implementation for SH4
(backward memcpy algorithm)
Modified libc/string/generic/Makefile.in to handle
subtarget implementations.
Fixed generic memmove code to handle backward memcpy
by using a selectable config option __ARCH_HAS_BWD_MEMCPY__
This option is on for SH4 arch
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/string/generic/memmove.c')
| -rw-r--r-- | libc/string/generic/memmove.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libc/string/generic/memmove.c b/libc/string/generic/memmove.c index 68caacd78..febf014ca 100644 --- a/libc/string/generic/memmove.c +++ b/libc/string/generic/memmove.c @@ -29,7 +29,8 @@ libc_hidden_proto(memcpy) static void _wordcopy_bwd_aligned (long int dstp, long int srcp, size_t len) { - op_t a0, a1; + op_t a0 = 0; + op_t a1 = 0; switch (len % 8) { @@ -133,7 +134,10 @@ static void _wordcopy_bwd_aligned (long int dstp, long int srcp, size_t len) static void _wordcopy_bwd_dest_aligned (long int dstp, long int srcp, size_t len) { - op_t a0, a1, a2, a3; + op_t a0 = 0; + op_t a1 = 0; + op_t a2 = 0; + op_t a3 = 0; int sh_1, sh_2; /* Calculate how to shift a word read at the memory operation @@ -218,8 +222,8 @@ void *memmove (void *dest, const void *src, size_t len) Reduces the working set. */ if (dstp - srcp >= len) /* *Unsigned* compare! */ { -#if 1 -#warning REMINDER: generic-opt memmove assumes memcpy does forward copying! +#ifndef __ARCH_HAS_BWD_MEMCPY__ + /* generic-opt memmove assumes memcpy does forward copying! */ memcpy(dest, src, len); #else /* Copy from the beginning to the end. */ |