Index: lib/Target/Mips/MicroMipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrInfo.td
+++ lib/Target/Mips/MicroMipsInstrInfo.td
@@ -1056,16 +1056,14 @@
                ISA_MICROMIPS, ASE_EVA;
   def SCE_MM : MMRel, SCEBaseMM<"sce", GPR32Opnd>, LLE_FM_MM<0xA>,
                ISA_MICROMIPS, ASE_EVA;
-}
-let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in {
+
   let DecoderMethod = "DecodeCacheOpMM" in {
-  def CACHE_MM : MMRel, CacheOp<"cache", mem_mm_12, II_CACHE>,
-                 CACHE_PREF_FM_MM<0x08, 0x6>;
-  def PREF_MM  : MMRel, CacheOp<"pref", mem_mm_12, II_PREF>,
-                 CACHE_PREF_FM_MM<0x18, 0x2>;
+    def CACHE_MM : MMRel, CacheOp<"cache", mem_mm_12, II_CACHE>,
+                   CACHE_PREF_FM_MM<0x08, 0x6>, ISA_MICROMIPS32_NOT_MIPS32R6;
+    def PREF_MM  : MMRel, CacheOp<"pref", mem_mm_12, II_PREF>,
+                   CACHE_PREF_FM_MM<0x18, 0x2>, ISA_MICROMIPS32_NOT_MIPS32R6;
   }
-}
-let DecoderNamespace = "MicroMips" in {
+
   let DecoderMethod = "DecodePrefeOpMM" in {
     def PREFE_MM  : MMRel, CacheOp<"prefe", mem_mm_9, II_PREFE>,
                     CACHE_PREFE_FM_MM<0x18, 0x2>, ISA_MICROMIPS, ASE_EVA;
Index: lib/Target/Mips/Mips32r6InstrInfo.td
===================================================================
--- lib/Target/Mips/Mips32r6InstrInfo.td
+++ lib/Target/Mips/Mips32r6InstrInfo.td
@@ -869,9 +869,7 @@
   def BNEZC : R6MMR6Rel, BNEZC_ENC, BNEZC_DESC, ISA_MIPS32R6;
   def BNVC : R6MMR6Rel, BNVC_ENC, BNVC_DESC, ISA_MIPS32R6;
   def BOVC : R6MMR6Rel, BOVC_ENC, BOVC_DESC, ISA_MIPS32R6;
-}
-def CACHE_R6 : R6MMR6Rel, CACHE_ENC, CACHE_DESC, ISA_MIPS32R6;
-let AdditionalPredicates = [NotInMicroMips] in {
+  def CACHE_R6 : R6MMR6Rel, CACHE_ENC, CACHE_DESC, ISA_MIPS32R6;
   def CLASS_D : CLASS_D_ENC, CLASS_D_DESC, ISA_MIPS32R6, HARDFLOAT;
   def CLASS_S : CLASS_S_ENC, CLASS_S_DESC, ISA_MIPS32R6, HARDFLOAT;
 }
@@ -924,8 +922,8 @@
   def MULU   : R6MMR6Rel, MULU_ENC, MULU_DESC, ISA_MIPS32R6;
 }
 def NAL; // BAL with rd=0
-def PREF_R6 : R6MMR6Rel, PREF_ENC, PREF_DESC, ISA_MIPS32R6;
 let AdditionalPredicates = [NotInMicroMips] in {
+  def PREF_R6 : R6MMR6Rel, PREF_ENC, PREF_DESC, ISA_MIPS32R6;
   def RINT_D : RINT_D_ENC, RINT_D_DESC, ISA_MIPS32R6, HARDFLOAT;
   def RINT_S : RINT_S_ENC, RINT_S_DESC, ISA_MIPS32R6, HARDFLOAT;
   def SC_R6 : SC_R6_ENC, SC_R6_DESC, PTR_32, ISA_MIPS32R6;
Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -2448,10 +2448,12 @@
   let DecoderMethod = "DecodeCacheOp";
 }
 
-def CACHE : MMRel, CacheOp<"cache", mem, II_CACHE>, CACHEOP_FM<0b101111>,
-            INSN_MIPS3_32_NOT_32R6_64R6;
-def PREF :  MMRel, CacheOp<"pref", mem, II_PREF>, CACHEOP_FM<0b110011>,
-            INSN_MIPS3_32_NOT_32R6_64R6;
+let AdditionalPredicates = [NotInMicroMips] in {
+  def CACHE : MMRel, CacheOp<"cache", mem, II_CACHE>, CACHEOP_FM<0b101111>,
+              INSN_MIPS3_32_NOT_32R6_64R6;
+  def PREF :  MMRel, CacheOp<"pref", mem, II_PREF>, CACHEOP_FM<0b110011>,
+              INSN_MIPS3_32_NOT_32R6_64R6;
+}
 // FIXME: We are missing the prefx instruction.
 def ROL : MipsAsmPseudoInst<(outs),
                             (ins GPR32Opnd:$rs, GPR32Opnd:$rt, GPR32Opnd:$rd),
Index: test/MC/Mips/micromips/valid.s
===================================================================
--- test/MC/Mips/micromips/valid.s
+++ test/MC/Mips/micromips/valid.s
@@ -187,7 +187,9 @@
 tltiu $9, 17767             # CHECK: tltiu $9, 17767        # encoding: [0x41,0x49,0x45,0x67]
 tnei $9, 17767              # CHECK: tnei $9, 17767         # encoding: [0x41,0x89,0x45,0x67]
 cache 1, 8($5)              # CHECK: cache 1, 8($5)         # encoding: [0x20,0x25,0x60,0x08]
+                            # CHECK-NEXT:                   # <MCInst #{{.*}} CACHE_MM
 pref 1, 8($5)               # CHECK: pref 1, 8($5)          # encoding: [0x60,0x25,0x20,0x08]
+                            # CHECK-NEXT:                   # <MCInst #{{.*}} PREF_MM
 ssnop                       # CHECK: ssnop                  # encoding: [0x00,0x00,0x08,0x00]
 ehb                         # CHECK: ehb                    # encoding: [0x00,0x00,0x18,0x00]
 pause                       # CHECK: pause                  # encoding: [0x00,0x00,0x28,0x00]
Index: test/MC/Mips/micromips32r6/valid.s
===================================================================
--- test/MC/Mips/micromips32r6/valid.s
+++ test/MC/Mips/micromips32r6/valid.s
@@ -46,6 +46,7 @@
   break 7                  # CHECK: break 7             # encoding: [0x00,0x07,0x00,0x07]
   break 7, 5               # CHECK: break 7, 5          # encoding: [0x00,0x07,0x01,0x47]
   cache 1, 8($5)           # CHECK: cache 1, 8($5)      # encoding: [0x20,0x25,0x60,0x08]
+                           # CHECK-NEXT:                # <MCInst #{{.*}} CACHE_MMR6
   clo $11, $a1             # CHECK: clo $11, $5         # encoding: [0x01,0x65,0x4b,0x3c]
   clz $sp, $gp             # CHECK: clz $sp, $gp        # encoding: [0x03,0x80,0xe8,0x50]
   div $3, $4, $5           # CHECK: div $3, $4, $5      # encoding: [0x00,0xa4,0x19,0x18]
@@ -113,6 +114,7 @@
   or $3, $4, $5            # CHECK: or $3, $4, $5       # encoding: [0x00,0xa4,0x1a,0x90]
   ori $3, $4, 1234         # CHECK: ori $3, $4, 1234    # encoding: [0x50,0x64,0x04,0xd2]
   pref 1, 8($5)            # CHECK: pref 1, 8($5)       # encoding: [0x60,0x25,0x20,0x08]
+                           # CHECK-NEXT:                # <MCInst #{{.*}} PREF_MMR6
   sb16 $3, 4($16)          # CHECK: sb16 $3, 4($16)     # encoding: [0x89,0x84]
   seb $3, $4               # CHECK: seb $3, $4          # encoding: [0x00,0x64,0x2b,0x3c]
                            # CHECK-NEXT:                # <MCInst #{{.*}} SEB_MM
Index: test/MC/Mips/mips32r6/valid.s
===================================================================
--- test/MC/Mips/mips32r6/valid.s
+++ test/MC/Mips/mips32r6/valid.s
@@ -66,6 +66,7 @@
         bovc     $2, $0, 4       # CHECK: bovc $2, $zero, 4    # encoding: [0x20,0x40,0x00,0x01]
         bovc     $2, $4, 4       # CHECK: bovc $2, $4, 4      # encoding: [0x20,0x82,0x00,0x01]
         cache      1, 8($5)         # CHECK: cache 1, 8($5)          # encoding: [0x7c,0xa1,0x04,0x25]
+                                    # CHECK-NEXT:                    # <MCInst #{{.*}} CACHE_R6
         ceil.w.d  $f11,$f24         # CHECK: ceil.w.d  $f11, $f24 # encoding: [0x46,0x20,0xc2,0xce]
                                     # CHECK:                      # <MCInst #{{.*}} CEIL_W_D64
         ceil.w.s  $f6,$f20          # CHECK: ceil.w.s  $f6, $f20  # encoding: [0x46,0x00,0xa1,0x8e]
@@ -152,6 +153,7 @@
                                  # CHECK-NEXT:                   # <MCInst #{{[0-9]+}} PAUSE
                                  # CHECK-NOT                     # <MCInst #{{[0-9}+}} PAUSE_MM
         pref    1, 8($5)         # CHECK: pref 1, 8($5)          # encoding: [0x7c,0xa1,0x04,0x35]
+                                 # CHECK-NEXT:                   # <MCInst #{{.*}} PREF_R6
         # FIXME: Use the code generator in order to print the .set directives
         #        instead of the instruction printer.
         rdhwr   $sp,$11          # CHECK:      .set  push