linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2011-01-25	x86-64, mem: Convert memmove() to assembly file and fix return value bug	Fenghua Yu	1	-192/+0
	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>
2010-09-24	x86, mem: Optimize memmove for small size and unaligned cases	Ma Ling	1	-45/+180
	movs instruction will combine data to accelerate moving data, however we need to concern two cases about it. 1. movs instruction need long lantency to startup, so here we use general mov instruction to copy data. 2. movs instruction is not good for unaligned case, even if src offset is 0x10, dest offset is 0x0, we avoid and handle the case by general mov instruction. Signed-off-by: Ma Ling <ling.ma@intel.com> LKML-Reference: <1284664360-6138-1-git-send-email-ling.ma@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-23	x86, mem: Don't implement forward memmove() as memcpy()	Ma, Ling	1	-5/+41
	memmove() allow source and destination address to be overlap, but there is no such limitation for memcpy(). Therefore, explicitly implement memmove() in both the forwards and backward directions, to give us the ability to optimize memcpy(). Signed-off-by: Ma Ling <ling.ma@intel.com> LKML-Reference: <C10D3FB0CD45994C8A51FEC1227CE22F0E483AD86A@shsmsx502.ccr.corp.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2008-04-17	x86: coding style fixes to arch/x86/lib/memmove_64.c	Paolo Ciarrocchi	1	-4/+4
	After the patch: total: 0 errors, 0 warnings, 21 lines checked no code changed: arch/x86/lib/memmove_64.o: text data bss dec hex filename 116 0 0 116 74 memmove_64.o.before 116 0 0 116 74 memmove_64.o.after md5: 2d6b0951cafb86a11a222cdd70f6104f memmove_64.o.before.asm 2d6b0951cafb86a11a222cdd70f6104f memmove_64.o.after.asm Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30	x86: remove unneded casts	Jan Engelhardt	1	-2/+2
	x86: remove unneeded casts Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-11	x86_64: move lib	Thomas Gleixner	1	-0/+21
	Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>