Hexagon backend support

[oota-llvm.git] / lib / Target / Hexagon / HexagonIntrinsicsDerived.td

diff --git a/lib/Target/Hexagon/HexagonIntrinsicsDerived.td b/lib/Target/Hexagon/HexagonIntrinsicsDerived.td
new file mode 100644 (file)
index 0000000..68eaf68
--- /dev/null
+++ b/lib/Target/Hexagon/HexagonIntrinsicsDerived.td
@@ -0,0 +1,29 @@
+//===-- HexagonIntrinsicsDerived.td - Derived intrinsics ---*- tablegen -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Multiply 64-bit and use lower result
+//
+// Optimized with intrinisics accumulates
+//
+def : Pat <(mul DoubleRegs:$src1, DoubleRegs:$src2),
+      (COMBINE_rr
+                  (Hexagon_M2_maci
+                           (Hexagon_M2_maci (EXTRACT_SUBREG  (MPYU64 (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
+                                                           (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg)),
+                                       subreg_hireg),
+                                       (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
+                                       (EXTRACT_SUBREG DoubleRegs:$src2, subreg_hireg)),
+                            (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg),
+                            (EXTRACT_SUBREG DoubleRegs:$src1, subreg_hireg)),
+                    (EXTRACT_SUBREG  (MPYU64 (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
+                                      (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg)),
+                     subreg_loreg))>;
+
+
+