[Hexagon] Generate multiply-high instruction in isel
llvm-svn: 305302
diff --git a/llvm/lib/Target/Hexagon/HexagonPatterns.td b/llvm/lib/Target/Hexagon/HexagonPatterns.td
index f269b74..a8c5658 100644
--- a/llvm/lib/Target/Hexagon/HexagonPatterns.td
+++ b/llvm/lib/Target/Hexagon/HexagonPatterns.td
@@ -401,6 +401,11 @@
def Zext64: PatFrag<(ops node:$Rs), (i64 (zext node:$Rs))>;
def Sext64: PatLeaf<(i64 Usxtw:$Rs)>;
+def: Pat<(i32 (trunc (sra (mul Sext64:$Rs, Sext64:$Rt), (i32 32)))),
+ (M2_mpy_up (LoReg Sext64:$Rs), (LoReg Sext64:$Rt))>;
+def: Pat<(i32 (trunc (srl (mul Sext64:$Rs, Sext64:$Rt), (i32 32)))),
+ (M2_mpy_up (LoReg Sext64:$Rs), (LoReg Sext64:$Rt))>;
+
def: Pat<(mul (Aext64 I32:$Rs), (Aext64 I32:$Rt)),
(M2_dpmpyuu_s0 I32:$Rs, I32:$Rt)>;