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| author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2008-09-09 16:55:27 +0000 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2008-09-09 16:55:27 +0000 |
| commit | e4f55f33f69fce85099dd5936cc74856aa1b453d (patch) | |
| tree | f35d6680197aa43098c99291e909150bf52f409a /libc/string/generic/memcopy.h | |
| parent | a79016198c859a3388584ac7782d760f349e2d67 (diff) | |
Add optimized memcpy implementation for sh4 (from Stuart Menefy @STMicroelectronics).
This implementation is based on 'backward copying'.
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/string/generic/memcopy.h')
| -rw-r--r-- | libc/string/generic/memcopy.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libc/string/generic/memcopy.h b/libc/string/generic/memcopy.h index df1ba9a97..fab4da764 100644 --- a/libc/string/generic/memcopy.h +++ b/libc/string/generic/memcopy.h @@ -107,6 +107,7 @@ typedef unsigned char byte; } \ } while (0) +#ifdef __ARCH_HAS_BWD_MEMCPY__ /* Copy *up to* NBYTES bytes from SRC_BP to DST_BP, with the assumption that DST_BP is aligned on an OPSIZ multiple. If not all bytes could be easily copied, store remaining number of bytes @@ -125,6 +126,8 @@ typedef unsigned char byte; (nbytes_left) = (nbytes) % OPSIZ; \ } while (0) +#endif + /* Copy *up to* NBYTES_TO_COPY bytes from SRC_END_PTR to DST_END_PTR, beginning at the words (of type op_t) right before the pointers and continuing towards smaller addresses. May take advantage of that |