From aaa9eb5101e3a748218fb9373dd9655b50582da2 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 11 Aug 2012 21:33:13 -0400
Subject: memcpy asm for i386 and x86_64

---
 src/string/x86_64/memcpy.s | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/string/x86_64/memcpy.s

(limited to 'src/string/x86_64')

diff --git a/src/string/x86_64/memcpy.s b/src/string/x86_64/memcpy.s
new file mode 100644
index 00000000..1282dc3b
--- /dev/null
+++ b/src/string/x86_64/memcpy.s
@@ -0,0 +1,22 @@
+.global memcpy
+.type memcpy,@function
+memcpy:
+	mov %rdi,%rax
+	cmp $8,%rdx
+	jc 1f
+	test $7,%edi
+	jz 1f
+2:	movsb
+	dec %rdx
+	test $7,%edi
+	jnz 2b
+1:	mov %rdx,%rcx
+	shr $3,%rcx
+	rep
+	movsq
+	and $7,%edx
+	jz 1f
+2:	movsb
+	dec %edx
+	jnz 2b
+1:	ret
-- 
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