From 7f0a430c7d327ba5e1f06f309fa814a31691d8c3 Mon Sep 17 00:00:00 2001
From: Colin LeMahieu <colinl@codeaurora.org>
Date: Fri, 5 Dec 2014 17:38:36 +0000
Subject: [PATCH] [Hexagon] Adding combine reg-reg forms.

llvm-svn: 223485
---
 llvm/lib/Target/Hexagon/HexagonInstrInfo.td      | 15 ++++++++++++++-
 llvm/test/MC/Disassembler/Hexagon/alu32_perm.txt |  8 ++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/Hexagon/HexagonInstrInfo.td b/llvm/lib/Target/Hexagon/HexagonInstrInfo.td
index 53124e8..dba0e52 100644
--- a/llvm/lib/Target/Hexagon/HexagonInstrInfo.td
+++ b/llvm/lib/Target/Hexagon/HexagonInstrInfo.td
@@ -91,7 +91,7 @@ multiclass CMP64_rr<string OpcStr, PatFrag OpNode> {
 }
 
 //===----------------------------------------------------------------------===//
-// ALU32/ALU (Instructions with register-register form)
+// ALU32/ALU +
 //===----------------------------------------------------------------------===//
 def SDTHexagonI64I32I32 : SDTypeProfile<1, 2,
   [SDTCisVT<0, i64>, SDTCisVT<1, i32>, SDTCisSameAs<1, 2>]>;
@@ -155,6 +155,19 @@ class T_ALU32_3op_pred<string mnemonic, bits<3> MajOp, bits<3> MinOp,
   let Inst{4-0} = Rd;
 }
 
+class T_ALU32_combineh<string Op1, string Op2, bits<3> MajOp, bits<3> MinOp,
+                      bit OpsRev>
+  : T_ALU32_3op<"", MajOp, MinOp, OpsRev, 0> {
+  let AsmString = "$Rd = combine($Rs"#Op1#", $Rt"#Op2#")";
+}
+
+let isCodeGenOnly = 0 in {
+def A2_combine_hh : T_ALU32_combineh<".h", ".h", 0b011, 0b100, 1>;
+def A2_combine_hl : T_ALU32_combineh<".h", ".l", 0b011, 0b101, 1>;
+def A2_combine_lh : T_ALU32_combineh<".l", ".h", 0b011, 0b110, 1>;
+def A2_combine_ll : T_ALU32_combineh<".l", ".l", 0b011, 0b111, 1>;
+}
+
 multiclass T_ALU32_3op_p<string mnemonic, bits<3> MajOp, bits<3> MinOp,
                          bit OpsRev> {
   def t    : T_ALU32_3op_pred<mnemonic, MajOp, MinOp, OpsRev, 0, 0>;
diff --git a/llvm/test/MC/Disassembler/Hexagon/alu32_perm.txt b/llvm/test/MC/Disassembler/Hexagon/alu32_perm.txt
index ea1a0b6..00ea892 100644
--- a/llvm/test/MC/Disassembler/Hexagon/alu32_perm.txt
+++ b/llvm/test/MC/Disassembler/Hexagon/alu32_perm.txt
@@ -1,5 +1,13 @@
 # RUN: llvm-mc --triple hexagon -disassemble < %s | FileCheck %s
 
+0x11 0xdf 0x95 0xf3
+# CHECK: r17 = combine(r31.h, r21.h)
+0x11 0xdf 0xb5 0xf3
+# CHECK: r17 = combine(r31.h, r21.l)
+0x11 0xdf 0xd5 0xf3
+# CHECK: r17 = combine(r31.l, r21.h)
+0x11 0xdf 0xf5 0xf3
+# CHECK: r17 = combine(r31.l, r21.l)
 0x11 0xc0 0x15 0x70
 # CHECK: r17 = aslh(r21)
 0x11 0xc0 0x35 0x70
-- 
2.7.4