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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/i386/lib/memcpy.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/i386/lib/memcpy.c')
-rw-r--r-- | arch/i386/lib/memcpy.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/i386/lib/memcpy.c b/arch/i386/lib/memcpy.c new file mode 100644 index 0000000..891b235 --- /dev/null +++ b/arch/i386/lib/memcpy.c @@ -0,0 +1,44 @@ +#include <linux/config.h> +#include <linux/string.h> +#include <linux/module.h> + +#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); |