1 files changed, 23 insertions, 0 deletions

diff --git a/arch/blackfin/lib/umulsi3_highpart.S b/arch/blackfin/lib/umulsi3_highpart.S
new file mode 100644
index 000000000000..aac8218fb258
--- /dev/null
+++ b/arch/blackfin/lib/umulsi3_highpart.S
@@ -0,0 +1,23 @@
+.align 2
+.global ___umulsi3_highpart;
+.type ___umulsi3_highpart, STT_FUNC;
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+.section .l1.text
+#else
+.text
+#endif
+
+___umulsi3_highpart:
+        R2 = R1.H * R0.H, R3 = R1.L * R0.H (FU);
+        R0 = R1.L * R0.L, R1 = R1.H * R0.L (FU);
+        R0 >>= 16;
+        /* Unsigned multiplication has the nice property that we can
+           ignore carry on this first addition.  */
+        R0 = R0 + R3;
+        R0 = R0 + R1;
+        cc = ac0;
+        R1 = cc;
+        R1 = PACK(R1.l,R0.h);
+        R0 = R1 + R2;
+        RTS;