1 files changed, 29 insertions, 0 deletions
diff --git a/libkern/strncmp-power.s b/libkern/strncmp-power.s
new file mode 100644
index 00000000..c55962fa
--- /dev/null
+++ b/libkern/strncmp-power.s
@@ -0,0 +1,29 @@
+TEXT	strncmp(SB), $0
+#define	BDNZ	BC	16,0,
+
+	MOVW	s2+4(FP), R4
+	MOVW	n+8(FP), R7
+
+	CMP	R7, $0
+	MOVW	R7, CTR
+	BLE	eq
+
+	SUB	$1, R3
+	SUB	$1, R4
+l1:
+	MOVBZU	1(R3), R5
+	MOVBZU	1(R4), R6
+	CMP	R5, R6
+	BNE	ne
+	CMP	R5, $0
+	BEQ	eq
+	BDNZ	l1
+eq:
+	MOVW	$0, R3
+	RETURN
+ne:
+	MOVW	$1, R3
+	BGT	ret
+	MOVW	$-1, R3
+ret:
+	RETURN