3 Commits

Author	SHA1	Message	Date
Andy Lutomirski	59e97e4d6f	x86: Make alternative instruction pointers relative ... This save a few bytes on x86-64 and means that future patches can apply alternatives to unrelocated code. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/ff64a6b9a1a3860ca4a7b8b6dc7b4754f9491cd7.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>	2011-07-13 11:22:56 -07:00
Fenghua Yu	057e05c1d6	x86, mem: memmove_64.S: Optimize memmove by enhanced REP MOVSB/STOSB ... Support memmove() by enhanced rep movsb. On processors supporting enhanced REP MOVSB/STOSB, the alternative memmove() function using enhanced rep movsb overrides the original function. The patch doesn't change the backward memmove case to use enhanced rep movsb. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Link: http://lkml.kernel.org/r/1305671358-14478-9-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>	2011-05-17 15:40:30 -07:00
Fenghua Yu	9599ec0471	x86-64, mem: Convert memmove() to assembly file and fix return value bug ... memmove_64.c only implements memmove() function which is completely written in inline assembly code. Therefore it doesn't make sense to keep the assembly code in .c file. Currently memmove() doesn't store return value to rax. This may cause issue if caller uses the return value. The patch fixes this issue. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> LKML-Reference: <1295314755-6625-1-git-send-email-fenghua.yu@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>	2011-01-25 16:58:39 -08:00