Index: llvm/trunk/lib/Target/Mips/MicroMips32r6InstrInfo.td
===================================================================
--- llvm/trunk/lib/Target/Mips/MicroMips32r6InstrInfo.td
+++ llvm/trunk/lib/Target/Mips/MicroMips32r6InstrInfo.td
@@ -24,6 +24,8 @@
 class BITSWAP_MMR6_ENC : POOL32A_BITSWAP_FM_MMR6<0b101100>;
 class CACHE_MMR6_ENC : CACHE_PREF_FM_MMR6<0b001000, 0b0110>;
 class PREF_MMR6_ENC : CACHE_PREF_FM_MMR6<0b011000, 0b0010>;
+class SUB_MMR6_ENC : ARITH_FM_MMR6<"sub", 0x190>;
+class SUBU_MMR6_ENC : ARITH_FM_MMR6<"subu", 0x1d0>;
 
 //===----------------------------------------------------------------------===//
 //
@@ -48,6 +50,8 @@
   list<Register> Defs = [RA];
 }
 class BC_MMR6_DESC : BC_MMR6_DESC_BASE<"bc", brtarget26>;
+class SUB_MMR6_DESC : ArithLogicR<"sub", GPR32Opnd>;
+class SUBU_MMR6_DESC : ArithLogicR<"subu", GPR32Opnd>;
 
 class BITSWAP_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
     : MMR6Arch<instr_asm> {
@@ -87,4 +91,6 @@
                    ISA_MICROMIPS32R6;
 def CACHE_MMR6 : R6MMR6Rel, CACHE_MMR6_ENC, CACHE_MMR6_DESC, ISA_MICROMIPS32R6;
 def PREF_MMR6 : R6MMR6Rel, PREF_MMR6_ENC, PREF_MMR6_DESC, ISA_MICROMIPS32R6;
+def SUB_MMR6 : StdMMR6Rel, SUB_MMR6_DESC, SUB_MMR6_ENC, ISA_MICROMIPS32R6;
+def SUBU_MMR6 : StdMMR6Rel, SUBU_MMR6_DESC, SUBU_MMR6_ENC, ISA_MICROMIPS32R6;
 }
Index: llvm/trunk/test/MC/Disassembler/Mips/micromips32r6.txt
===================================================================
--- llvm/trunk/test/MC/Disassembler/Mips/micromips32r6.txt
+++ llvm/trunk/test/MC/Disassembler/Mips/micromips32r6.txt
@@ -20,3 +20,8 @@
 
 # CHECK: pref 1, 8($5)
 0x60 0x25 0x20 0x08
+
+0x00 0xa4 0x19 0x90 # CHECK: sub $3, $4, $5
+
+0x00 0xa4 0x19 0xd0 # CHECK: subu $3, $4, $5
+
Index: llvm/trunk/test/MC/Mips/micromips32r6/valid.s
===================================================================
--- llvm/trunk/test/MC/Mips/micromips32r6/valid.s
+++ llvm/trunk/test/MC/Mips/micromips32r6/valid.s
@@ -9,3 +9,6 @@
   bitswap $4, $2           # CHECK: bitswap $4, $2      # encoding: [0x00,0x44,0x0b,0x3c]
   cache 1, 8($5)           # CHECK: cache 1, 8($5)      # encoding: [0x20,0x25,0x60,0x08]
   pref 1, 8($5)            # CHECK: pref 1, 8($5)       # encoding: [0x60,0x25,0x20,0x08]
+  sub $3, $4, $5           # CHECK: sub $3, $4, $5      # encoding: [0x00,0xa4,0x19,0x90]
+  subu $3, $4, $5          # CHECK: subu $3, $4, $5     # encoding: [0x00,0xa4,0x19,0xd0]
+