Index: lib/Target/Mips/MicroMipsInstrFormats.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrFormats.td
+++ lib/Target/Mips/MicroMipsInstrFormats.td
@@ -72,6 +72,15 @@
   let Inst{4-0}   = rd;
 }
 
+class BRKSDBBP16_FM_MM<bits<6> op> {
+  bits<4> code_;
+  bits<16> Inst;
+
+  let Inst{15-10} = 0x11;
+  let Inst{9-4}   = op;
+  let Inst{3-0}   = code_;
+}
+
 //===----------------------------------------------------------------------===//
 // MicroMIPS 32-bit Instruction Formats
 //===----------------------------------------------------------------------===//
Index: lib/Target/Mips/MicroMipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrInfo.td
+++ lib/Target/Mips/MicroMipsInstrInfo.td
@@ -104,6 +104,12 @@
   let Defs = [RA];
 }
 
+// Break16 and Sdbbp16
+class BrkSdbbp16MM<string opstr> :
+  MicroMipsInst16<(outs), (ins uimm4:$code_),
+                  !strconcat(opstr, "\t$code_"),
+                  [], NoItinerary, FrmOther>;
+
 def MFHI16_MM : MoveFromHILOMM<"mfhi", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x10>;
 def MFLO16_MM : MoveFromHILOMM<"mflo", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x12>;
 def MOVE16_MM : MoveMM16<"move", GPR32Opnd>, MOVE_FM_MM16<0x03>;
@@ -311,6 +317,9 @@
   /// Load-linked, Store-conditional
   def LL_MM : LLBaseMM<"ll", GPR32Opnd>, LL_FM_MM<0x3>;
   def SC_MM : SCBaseMM<"sc", GPR32Opnd>, LL_FM_MM<0xb>;
+
+  def BREAK16_MM : BrkSdbbp16MM<"break16">, BRKSDBBP16_FM_MM<0x28>;
+  def SDBBP16_MM : BrkSdbbp16MM<"sdbbp16">, BRKSDBBP16_FM_MM<0x2C>;
 }
 
 //===----------------------------------------------------------------------===//
Index: test/MC/Mips/micromips-16-bit-instructions.s
===================================================================
--- test/MC/Mips/micromips-16-bit-instructions.s
+++ test/MC/Mips/micromips-16-bit-instructions.s
@@ -9,6 +9,8 @@
 #------------------------------------------------------------------------------
 # Little endian
 #------------------------------------------------------------------------------
+# CHECK-EL: break16 8               # encoding: [0x88,0x46]
+# CHECK-EL: sdbbp16 14              # encoding: [0xce,0x46]
 # CHECK-EL: mfhi    $9              # encoding: [0x09,0x46]
 # CHECK-EL: mflo    $9              # encoding: [0x49,0x46]
 # CHECK-EL: move    $25, $1         # encoding: [0x21,0x0f]
@@ -16,11 +18,15 @@
 #------------------------------------------------------------------------------
 # Big endian
 #------------------------------------------------------------------------------
+# CHECK-EB: break16 8               # encoding: [0x46,0x88]
+# CHECK-EB: sdbbp16 14              # encoding: [0x46,0xce]
 # CHECK-EB: mfhi    $9              # encoding: [0x46,0x09]
 # CHECK-EB: mflo    $9              # encoding: [0x46,0x49]
 # CHECK-EB: move    $25, $1         # encoding: [0x0f,0x21]
 # CHECK-EB: jalr    $9              # encoding: [0x45,0xc9]
 
+    break16 8
+    sdbbp16 14
     mfhi    $9
     mflo    $9
     move    $25, $1