[PATCH] [mips][microMIPSr6] Implement initial subtarget support

[Jozef Kolek]

http://reviews.llvm.org/D8386

Files:
  lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
  lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
  lib/Target/Mips/MipsInstrInfo.td
  lib/Target/Mips/MipsSubtarget.h

Index: lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
===================================================================
--- lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -115,6 +115,10 @@
   return STI.getFeatureBits() & Mips::FeatureMicroMips;
 }
 
+bool MipsMCCodeEmitter::isMips32r6(const MCSubtargetInfo &STI) const {
+  return STI.getFeatureBits() & Mips::FeatureMips32r6;
+}
+
 void MipsMCCodeEmitter::EmitByte(unsigned char C, raw_ostream &OS) const {
   OS << (char)C;
 }
Index: lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
===================================================================
--- lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
+++ lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
@@ -38,6 +38,7 @@
   bool IsLittleEndian;
 
   bool isMicroMips(const MCSubtargetInfo &STI) const;
+  bool isMips32r6(const MCSubtargetInfo &STI) const;
 
 public:
   MipsMCCodeEmitter(const MCInstrInfo &mcii, MCContext &Ctx_, bool IsLittle)
Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -182,6 +182,8 @@
                       AssemblerPredicate<"FeatureMips64r6">;
 def NotMips64r6  :    Predicate<"!Subtarget->hasMips64r6()">,
                       AssemblerPredicate<"!FeatureMips64r6">;
+def HasMicroMips32r6 : Predicate<"Subtarget->inMicroMips32r6Mode()">,
+                       AssemblerPredicate<"FeatureMicroMips,FeatureMips32r6">;
 def InMips16Mode :    Predicate<"Subtarget->inMips16Mode()">,
                       AssemblerPredicate<"FeatureMips16">;
 def HasCnMips    :    Predicate<"Subtarget->hasCnMips()">,
@@ -249,6 +251,9 @@
 class ISA_MIPS64R2 { list<Predicate> InsnPredicates = [HasMips64r2]; }
 class ISA_MIPS32R6 { list<Predicate> InsnPredicates = [HasMips32r6]; }
 class ISA_MIPS64R6 { list<Predicate> InsnPredicates = [HasMips64r6]; }
+class ISA_MICROMIPS32R6 {
+  list<Predicate> InsnPredicates = [HasMicroMips32r6];
+}
 
 // The portions of MIPS-III that were also added to MIPS32
 class INSN_MIPS3_32 { list<Predicate> InsnPredicates = [HasMips3_32]; }
Index: lib/Target/Mips/MipsSubtarget.h
===================================================================
--- lib/Target/Mips/MipsSubtarget.h
+++ lib/Target/Mips/MipsSubtarget.h
@@ -225,6 +225,7 @@
     return inMips16Mode() && InMips16HardFloat;
   }
   bool inMicroMipsMode() const { return InMicroMipsMode; }
+  bool inMicroMips32r6Mode() const { return InMicroMipsMode && hasMips32r6(); }
   bool hasDSP() const { return HasDSP; }
   bool hasDSPR2() const { return HasDSPR2; }
   bool hasMSA() const { return HasMSA; }

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