From aaa9eb5101e3a748218fb9373dd9655b50582da2 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 11 Aug 2012 21:33:13 -0400 Subject: memcpy asm for i386 and x86_64 --- src/string/i386/memcpy.s | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/string/i386/memcpy.s (limited to 'src/string/i386/memcpy.s') diff --git a/src/string/i386/memcpy.s b/src/string/i386/memcpy.s new file mode 100644 index 00000000..b2977c89 --- /dev/null +++ b/src/string/i386/memcpy.s @@ -0,0 +1,29 @@ +.global memcpy +.type memcpy,@function +memcpy: + push %esi + push %edi + mov 12(%esp),%edi + mov 16(%esp),%esi + mov 20(%esp),%ecx + mov %edi,%eax + cmp $4,%ecx + jc 1f + test $3,%edi + jz 1f +2: movsb + dec %ecx + test $3,%edi + jnz 2b +1: mov %ecx,%edx + shr $2,%ecx + rep + movsl + and $3,%edx + jz 1f +2: movsb + dec %edx + jnz 2b +1: pop %edi + pop %esi + ret -- cgit v1.2.1