From c4ba09da6064c61ff75890987d6e73a5fc7a6125 Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@apple.com>
Date: Tue, 7 Dec 2010 20:02:45 +0000
Subject: [PATCH] Add new built-in operations for vmull and vmull_n so they can
 be implemented without requiring clang builtins. Radar 8446238.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121173 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/NeonEmitter.cpp | 18 ++++++++++++++++++
 utils/TableGen/NeonEmitter.h   |  4 ++++
 2 files changed, 22 insertions(+)

diff --git a/utils/TableGen/NeonEmitter.cpp b/utils/TableGen/NeonEmitter.cpp
index 3752db0f4d0..7fdc1cacd69 100644
--- a/utils/TableGen/NeonEmitter.cpp
+++ b/utils/TableGen/NeonEmitter.cpp
@@ -508,6 +508,15 @@ static std::string GenMacroLocals(const std::string &proto, StringRef typestr) {
   return s;
 }
 
+// Use the vmovl builtin to sign-extend or zero-extend a vector.
+static std::string Extend(const std::string &proto, StringRef typestr,
+                          const std::string &a) {
+  std::string s;
+  s = MangleName("vmovl", typestr, ClassS);
+  s += "(" + a + ")";
+  return s;
+}
+
 static std::string Duplicate(unsigned nElts, StringRef typestr,
                              const std::string &a) {
   std::string s;
@@ -587,6 +596,15 @@ static std::string GenOpString(OpKind op, const std::string &proto,
   case OpMul:
     s += "__a * __b;";
     break;
+  case OpMullN:
+    s += Extend(proto, typestr, "__a") + " * " +
+      Extend(proto, typestr,
+             Duplicate(nElts << (int)quad, typestr, "__b")) + ";";
+    break;
+  case OpMull:
+    s += Extend(proto, typestr, "__a") + " * " +
+      Extend(proto, typestr, "__b") + ";";
+    break;
   case OpMlaN:
     s += "__a + (__b * " + Duplicate(nElts, typestr, "__c") + ");";
     break;
diff --git a/utils/TableGen/NeonEmitter.h b/utils/TableGen/NeonEmitter.h
index 3d122ffbba9..0ee856c26bd 100644
--- a/utils/TableGen/NeonEmitter.h
+++ b/utils/TableGen/NeonEmitter.h
@@ -26,9 +26,11 @@ enum OpKind {
   OpAdd,
   OpSub,
   OpMul,
+  OpMull,
   OpMla,
   OpMls,
   OpMulN,
+  OpMullN,
   OpMlaN,
   OpMlsN,
   OpMulLane,
@@ -79,9 +81,11 @@ namespace llvm {
       OpMap["OP_ADD"]   = OpAdd;
       OpMap["OP_SUB"]   = OpSub;
       OpMap["OP_MUL"]   = OpMul;
+      OpMap["OP_MULL"]  = OpMull;
       OpMap["OP_MLA"]   = OpMla;
       OpMap["OP_MLS"]   = OpMls;
       OpMap["OP_MUL_N"] = OpMulN;
+      OpMap["OP_MULL_N"]= OpMullN;
       OpMap["OP_MLA_N"] = OpMlaN;
       OpMap["OP_MLS_N"] = OpMlsN;
       OpMap["OP_MUL_LN"]= OpMulLane;