From 44f0257fc316ff4b33aa3438dd8d891b7d6d72b9 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:16:33 +0200 Subject: i386: move lib Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/lib/memcpy_32.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 arch/x86/lib/memcpy_32.c (limited to 'arch/x86/lib/memcpy_32.c') diff --git a/arch/x86/lib/memcpy_32.c b/arch/x86/lib/memcpy_32.c new file mode 100644 index 0000000..8ac51b8 --- /dev/null +++ b/arch/x86/lib/memcpy_32.c @@ -0,0 +1,43 @@ +#include +#include + +#undef memcpy +#undef memset + +void *memcpy(void *to, const void *from, size_t n) +{ +#ifdef CONFIG_X86_USE_3DNOW + return __memcpy3d(to, from, n); +#else + return __memcpy(to, from, n); +#endif +} +EXPORT_SYMBOL(memcpy); + +void *memset(void *s, int c, size_t count) +{ + return __memset(s, c, count); +} +EXPORT_SYMBOL(memset); + +void *memmove(void *dest, const void *src, size_t n) +{ + int d0, d1, d2; + + if (dest < src) { + memcpy(dest,src,n); + } else { + __asm__ __volatile__( + "std\n\t" + "rep\n\t" + "movsb\n\t" + "cld" + : "=&c" (d0), "=&S" (d1), "=&D" (d2) + :"0" (n), + "1" (n-1+(const char *)src), + "2" (n-1+(char *)dest) + :"memory"); + } + return dest; +} +EXPORT_SYMBOL(memmove); -- cgit v1.1