1 files changed, 31 insertions, 0 deletions
diff --git a/kvm/user/test/x86/stringio.S b/kvm/user/test/x86/stringio.S
new file mode 100644
index 000000000..31ddc479f
--- /dev/null
+++ b/kvm/user/test/x86/stringio.S
@@ -0,0 +1,31 @@
+
+.data
+
+.macro str name, value
+
+\name :	.long 1f-2f
+2:	.ascii "\value"
+1:	
+.endm	
+
+	str "forward", "forward"
+	str "backward", "backward"
+		
+.text
+
+
+	cld
+	movl forward, %ecx
+	lea  4+forward, %rsi
+	movw $1, %dx
+	rep outsb
+
+	std
+	movl backward, %ecx
+	lea 4+backward-1(%rcx), %rsi
+	movw $2, %dx
+	rep outsb
+	
+	hlt
+
+