From 1daa5bea5858ca9d05ab6da1a38a66471e26a7a6 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanak@gmail.com>
Date: Tue, 20 Sep 2011 20:28:08 +0000
Subject: [PATCH] Initial Mips64 support. Patch by Liu with some modifications.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140178 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/Mips.td         | 13 +++++++++++++
 lib/Target/Mips/MipsSubtarget.h |  9 +++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/lib/Target/Mips/Mips.td b/lib/Target/Mips/Mips.td
index d55d7afba98..39c2c164f66 100644
--- a/lib/Target/Mips/Mips.td
+++ b/lib/Target/Mips/Mips.td
@@ -38,6 +38,10 @@ def FeatureSingleFloat : SubtargetFeature<"single-float", "IsSingleFloat",
                                 "true", "Only supports single precision float">;
 def FeatureO32         : SubtargetFeature<"o32", "MipsABI", "O32",
                                 "Enable o32 ABI">;
+def FeatureN32         : SubtargetFeature<"n32", "MipsABI", "N32",
+                                "Enable n32 ABI">;
+def FeatureN64         : SubtargetFeature<"n64", "MipsABI", "N64",
+                                "Enable n64 ABI">;
 def FeatureEABI        : SubtargetFeature<"eabi", "MipsABI", "EABI",
                                 "Enable eabi ABI">;
 def FeatureVFPU        : SubtargetFeature<"vfpu", "HasVFPU",
@@ -60,6 +64,13 @@ def FeatureMips32      : SubtargetFeature<"mips32", "MipsArchVersion", "Mips32",
 def FeatureMips32r2    : SubtargetFeature<"mips32r2", "MipsArchVersion",
                                 "Mips32r2", "Mips32r2 ISA Support",
                                 [FeatureMips32, FeatureSEInReg]>;
+def FeatureMips64      : SubtargetFeature<"mips64", "MipsArchVersion",
+                                "Mips64", "Mips64 ISA Support",
+                                [FeatureGP64Bit, FeatureFP64Bit,
+                                 FeatureMips32]>;
+def FeatureMips64r2    : SubtargetFeature<"mips64r2", "MipsArchVersion",
+                                "Mips64r2", "Mips64r2 ISA Support",
+                                [FeatureMips64, FeatureMips32r2]>;
 
 //===----------------------------------------------------------------------===//
 // Mips processors supported.
@@ -70,6 +81,8 @@ class Proc<string Name, list<SubtargetFeature> Features>
 
 def : Proc<"mips32r1", [FeatureMips32]>;
 def : Proc<"4ke", [FeatureMips32r2]>;
+def : Proc<"mips64r1", [FeatureMips64]>;
+def : Proc<"mips64r2", [FeatureMips64r2]>;
 
 def MipsAsmWriter : AsmWriter {
   string AsmWriterClassName  = "InstPrinter";
diff --git a/lib/Target/Mips/MipsSubtarget.h b/lib/Target/Mips/MipsSubtarget.h
index 77bd31c78d8..9a8f0996ad7 100644
--- a/lib/Target/Mips/MipsSubtarget.h
+++ b/lib/Target/Mips/MipsSubtarget.h
@@ -35,7 +35,7 @@ public:
 protected:
 
   enum MipsArchEnum {
-    Mips32, Mips32r2
+    Mips32, Mips32r2, Mips64, Mips64r2
   };
 
   // Mips architecture version
@@ -91,6 +91,8 @@ public:
 
   /// Only O32 and EABI supported right now.
   bool isABI_EABI() const { return MipsABI == EABI; }
+  bool isABI_N64() const { return MipsABI == N64; }
+  bool isABI_N32() const { return MipsABI == N32; }
   bool isABI_O32() const { return MipsABI == O32; }
   unsigned getTargetABI() const { return MipsABI; }
 
@@ -104,7 +106,10 @@ public:
   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
 
   bool isMips32() const { return MipsArchVersion >= Mips32; }
-  bool isMips32r2() const { return MipsArchVersion == Mips32r2; }
+  bool isMips32r2() const { return MipsArchVersion == Mips32r2 ||
+                                   MipsArchVersion == Mips64r2; }
+  bool isMips64() const { return MipsArchVersion >= Mips64; }
+  bool isMips64r2() const { return MipsArchVersion == Mips64r2; }
 
   bool isLittle() const { return IsLittle; }
   bool isFP64bit() const { return IsFP64bit; }
-- 
2.34.1