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-rw-r--r--kernel/arch/blackfin/lib/smulsi3_highpart.S38
1 files changed, 38 insertions, 0 deletions
diff --git a/kernel/arch/blackfin/lib/smulsi3_highpart.S b/kernel/arch/blackfin/lib/smulsi3_highpart.S
new file mode 100644
index 000000000..e50d6c4ac
--- /dev/null
+++ b/kernel/arch/blackfin/lib/smulsi3_highpart.S
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * Licensed under the Clear BSD license or the GPL-2 (or later)
+ */
+
+.align 2
+.global ___smulsi3_highpart;
+.type ___smulsi3_highpart, STT_FUNC;
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+.section .l1.text
+#else
+.text
+#endif
+
+___smulsi3_highpart:
+ R2 = R1.L * R0.L (FU);
+ R3 = R1.H * R0.L (IS,M);
+ R0 = R0.H * R1.H, R1 = R0.H * R1.L (IS,M);
+
+ R1.L = R2.H + R1.L;
+ cc = ac0;
+ R2 = cc;
+
+ R1.L = R1.L + R3.L;
+ cc = ac0;
+ R1 >>>= 16;
+ R3 >>>= 16;
+ R1 = R1 + R3;
+ R1 = R1 + R2;
+ R2 = cc;
+ R1 = R1 + R2;
+
+ R0 = R0 + R1;
+ RTS;
+
+.size ___smulsi3_highpart, .-___smulsi3_highpart