Index: lib/Target/Mips/AsmParser/MipsAsmParser.cpp
===================================================================
--- lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -1192,6 +1192,14 @@
         if (UImm > 0x3c)
           return Error(IDLoc, "immediate operand value out of range");
         break;
+      case Mips::LI16_MM:
+        Opnd = Inst.getOperand(1);
+        if (!Opnd.isImm())
+          return Error(IDLoc, "expected immediate operand kind");
+        Imm = Opnd.getImm();
+        if (Imm < -1 || Imm > 126)
+          return Error(IDLoc, "immediate operand value out of range");
+        break;
     }
   }
 
Index: lib/Target/Mips/MicroMipsInstrFormats.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrFormats.td
+++ lib/Target/Mips/MicroMipsInstrFormats.td
@@ -126,6 +126,17 @@
   let Inst{4-0}   = rs;
 }
 
+class LI_FM_MM16 {
+  bits<3> rd;
+  bits<7> imm;
+
+  bits<16> Inst;
+
+  let Inst{15-10} = 0x3b;
+  let Inst{9-7}   = rd;
+  let Inst{6-0}   = imm;
+}
+
 class JALR_FM_MM16<bits<5> op> {
   bits<5> rs;
 
Index: lib/Target/Mips/MicroMipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrInfo.td
+++ lib/Target/Mips/MicroMipsInstrInfo.td
@@ -5,6 +5,7 @@
 def addrimm12 : ComplexPattern<iPTR, 2, "selectIntAddrMM", [frameindex]>;
 
 def simm4 : Operand<i32>;
+def simm7 : Operand<i32>;
 
 def simm12 : Operand<i32> {
   let DecoderMethod = "DecodeSimm12";
@@ -24,6 +25,8 @@
 
 def immZExt2Shift : ImmLeaf<i32, [{return Imm >= 0 && Imm <= 8;}]>;
 
+def immLi16 : ImmLeaf<i32, [{return Imm >= -1 && Imm <= 126;}]>;
+
 class mem_mm_4_generic : Operand<i32> {
   let PrintMethod = "printMemOperand";
   let ParserMatchClass = MipsMemAsmOperand;
@@ -195,6 +198,13 @@
   let isReMaterializable = 1;
 }
 
+class LoadImmMM16<string opstr, Operand Od, RegisterOperand RO,
+                  SDPatternOperator imm_type = null_frag> :
+  MicroMipsInst16<(outs RO:$rd), (ins Od:$imm),
+                  !strconcat(opstr, "\t$rd, $imm"), [], NoItinerary, FrmI> {
+  let isReMaterializable = 1;
+}
+
 // 16-bit Jump and Link (Call)
 class JumpLinkRegMM16<string opstr, RegisterOperand RO> :
   MicroMipsInst16<(outs), (ins RO:$rs), !strconcat(opstr, "\t$rs"),
@@ -293,6 +303,8 @@
 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>;
+def LI16_MM : LoadImmMM16<"li16", simm7, GPRMM16Opnd, immLi16>,
+              LI_FM_MM16, IsAsCheapAsAMove;
 def JALR16_MM : JumpLinkRegMM16<"jalr", GPR32Opnd>, JALR_FM_MM16<0x0e>;
 def JALRS16_MM : JumpLinkRegSMM16<"jalrs16", GPR32Opnd>, JALR_FM_MM16<0x0f>;
 def JRC16_MM : JumpRegCMM16<"jrc", GPR32Opnd>, JALR_FM_MM16<0x0d>;
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
@@ -23,6 +23,8 @@
 # CHECK-EL: sb16    $3, 4($16)      # encoding: [0x84,0x89]
 # CHECK-EL: sh16    $4, 8($17)      # encoding: [0x14,0xaa]
 # CHECK-EL: sw16    $4, 4($17)      # encoding: [0x11,0xea]
+# CHECK-EL: li16    $3, -1          # encoding: [0xff,0xed]
+# CHECK-EL: li16    $3, 126         # encoding: [0xfe,0xed]
 # CHECK-EL: addius5 $7, -2          # encoding: [0xfc,0x4c]
 # CHECK-EL: addiusp -16             # encoding: [0xf9,0x4f]
 # CHECK-EL: mfhi    $9              # encoding: [0x09,0x46]
@@ -53,6 +55,8 @@
 # CHECK-EB: sb16    $3, 4($16)      # encoding: [0x89,0x84]
 # CHECK-EB: sh16    $4, 8($17)      # encoding: [0xaa,0x14]
 # CHECK-EB: sw16    $4, 4($17)      # encoding: [0xea,0x11]
+# CHECK-EB: li16    $3, -1          # encoding: [0xed,0xff]
+# CHECK-EB: li16    $3, 126         # encoding: [0xed,0xfe]
 # CHECK-EB: addius5 $7, -2          # encoding: [0x4c,0xfc]
 # CHECK-EB: addiusp -16             # encoding: [0x4f,0xf9]
 # CHECK-EB: mfhi    $9              # encoding: [0x46,0x09]
@@ -81,6 +85,8 @@
     sb16    $3, 4($16)
     sh16    $4, 8($17)
     sw16    $4, 4($17)
+    li16    $3, -1
+    li16    $3, 126
     addius5 $7, -2
     addiusp -16
     mfhi    $9
Index: test/MC/Mips/micromips-invalid.s
===================================================================
--- test/MC/Mips/micromips-invalid.s
+++ test/MC/Mips/micromips-invalid.s
@@ -25,3 +25,5 @@
   sb16  $3, 64($16) # CHECK: :[[@LINE]]:{{[0-9]+}}: error: immediate operand value out of range
   sh16  $4, 68($17) # CHECK: :[[@LINE]]:{{[0-9]+}}: error: immediate operand value out of range
   sw16  $4, 64($17) # CHECK: :[[@LINE]]:{{[0-9]+}}: error: immediate operand value out of range
+  li16  $8, -1 # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  li16  $4, -2 # CHECK: :[[@LINE]]:{{[0-9]+}}: error: immediate operand value out of range