1 files changed, 56 insertions, 0 deletions
diff --git a/arch/loongarch/lib/tishift.S b/arch/loongarch/lib/tishift.S
new file mode 100644
index 000000000000..fa1d310012bc
--- /dev/null
+++ b/arch/loongarch/lib/tishift.S
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <asm/asmmacro.h>
+#include <linux/export.h>
+#include <linux/linkage.h>
+
+SYM_FUNC_START(__ashlti3)
+	srli.d	t2, a0, 1
+	nor	t3, zero, a2
+	sll.d	t1, a1, a2
+	srl.d	t2, t2, t3
+	andi	t0, a2, 64
+	sll.d	a0, a0, a2
+	or	t1, t2, t1
+	maskeqz	a1, a0, t0
+	masknez	a0, a0, t0
+	masknez	t0, t1, t0
+	or	a1, t0, a1
+	jr	ra
+SYM_FUNC_END(__ashlti3)
+EXPORT_SYMBOL(__ashlti3)
+
+SYM_FUNC_START(__ashrti3)
+	nor	t3, zero, a2
+	slli.d	t2, a1, 1
+	srl.d	t1, a0, a2
+	sll.d	t2, t2, t3
+	andi	t0, a2, 64
+	or	t1, t2, t1
+	sra.d	a2, a1, a2
+	srai.d	a1, a1, 63
+	maskeqz	a0, a2, t0
+	maskeqz	a1, a1, t0
+	masknez	a2, a2, t0
+	masknez	t0, t1, t0
+	or	a1, a1, a2
+	or	a0, t0, a0
+	jr	ra
+SYM_FUNC_END(__ashrti3)
+EXPORT_SYMBOL(__ashrti3)
+
+SYM_FUNC_START(__lshrti3)
+	slli.d	t2, a1, 1
+	nor	t3, zero, a2
+	srl.d	t1, a0, a2
+	sll.d	t2, t2, t3
+	andi	t0, a2, 64
+	srl.d	a1, a1, a2
+	or	t1, t2, t1
+	maskeqz	a0, a1, t0
+	masknez	a1, a1, t0
+	masknez	t0, t1, t0
+	or	a0, t0, a0
+	jr	ra
+SYM_FUNC_END(__lshrti3)
+EXPORT_SYMBOL(__lshrti3)