From e90b72ec3082588b296956730bd2930cf8d5d671 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 10 Jul 2026 11:31:46 +0800
Subject: refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.
---
 lib/string/x86_64/memcpy.s | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 lib/string/x86_64/memcpy.s

(limited to 'lib/string/x86_64/memcpy.s')

diff --git a/lib/string/x86_64/memcpy.s b/lib/string/x86_64/memcpy.s
new file mode 100644
index 0000000..3d960ef
--- /dev/null
+++ b/lib/string/x86_64/memcpy.s
@@ -0,0 +1,25 @@
+.global memcpy
+.global __memcpy_fwd
+.hidden __memcpy_fwd
+.type memcpy,@function
+memcpy:
+__memcpy_fwd:
+	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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