diff --git a/lib/Target/ARM/ARMAddressingModes.h b/lib/Target/ARM/ARMAddressingModes.h
index 0b5fb1d..595708f 100644
--- a/lib/Target/ARM/ARMAddressingModes.h
+++ b/lib/Target/ARM/ARMAddressingModes.h
@@ -409,7 +409,7 @@
   // The first operand is always a Reg.  The second operand is a reg if in
   // reg/reg form, otherwise it's reg#0.  The third field encodes the operation
   // in bit 12, the immediate in bits 0-11, and the shift op in 13-15. The
-  // forth operand 16-17 encodes the index mode.
+  // fourth operand 16-17 encodes the index mode.
   //
   // If this addressing mode is a frame index (before prolog/epilog insertion
   // and code rewriting), this operand will have the form:  FI#, reg0, <offs>
@@ -446,12 +446,14 @@
   //
   // The first operand is always a Reg.  The second operand is a reg if in
   // reg/reg form, otherwise it's reg#0.  The third field encodes the operation
-  // in bit 8, the immediate in bits 0-7.
+  // in bit 8, the immediate in bits 0-7. The fourth operand 9-10 encodes the
+  // index mode.
 
   /// getAM3Opc - This function encodes the addrmode3 opc field.
-  static inline unsigned getAM3Opc(AddrOpc Opc, unsigned char Offset) {
+  static inline unsigned getAM3Opc(AddrOpc Opc, unsigned char Offset,
+                                   unsigned IdxMode = 0) {
     bool isSub = Opc == sub;
-    return ((int)isSub << 8) | Offset;
+    return ((int)isSub << 8) | Offset | (IdxMode << 9);
   }
   static inline unsigned char getAM3Offset(unsigned AM3Opc) {
     return AM3Opc & 0xFF;
@@ -459,6 +461,9 @@
   static inline AddrOpc getAM3Op(unsigned AM3Opc) {
     return ((AM3Opc >> 8) & 1) ? sub : add;
   }
+  static inline unsigned getAM3IdxMode(unsigned AM3Opc) {
+    return (AM3Opc >> 9);
+  }
 
   //===--------------------------------------------------------------------===//
   // Addressing Mode #4
diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index e73ba68..f29fdde 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -577,6 +577,34 @@
   let Inst{15-12} = Rt;           // Rt
   let Inst{7-4}   = op;
 }
+
+// FIXME: Merge with the above class when addrmode2 gets used for LDR, LDRB
+// but for now use this class for LDRSBT, LDRHT, LDSHT.
+class AI3ldstidxT<bits<4> op, bit op20, bit isLd, bit isPre, dag oops, dag iops,
+                  IndexMode im, Format f, InstrItinClass itin, string opc,
+                  string asm, string cstr, list<dag> pattern>
+  : I<oops, iops, AddrMode3, Size4Bytes, im, f, itin,
+      opc, asm, cstr, pattern> {
+  // {13}     1 == imm8, 0 == Rm
+  // {12-9}   Rn
+  // {8}      isAdd
+  // {7-4}    imm7_4/zero
+  // {3-0}    imm3_0/Rm
+  bits<14> addr;
+  bits<4> Rt;
+  let Inst{27-25} = 0b000;
+  let Inst{24}    = isPre;        // P bit
+  let Inst{23}    = addr{8};      // U bit
+  let Inst{22}    = addr{13};     // 1 == imm8, 0 == Rm
+  let Inst{20}    = op20;         // L bit
+  let Inst{19-16} = addr{12-9};   // Rn
+  let Inst{15-12} = Rt;           // Rt
+  let Inst{11-8}  = addr{7-4};    // imm7_4/zero
+  let Inst{7-4}   = op;
+  let Inst{3-0}   = addr{3-0};    // imm3_0/Rm
+  let AsmMatchConverter = "CvtLdWriteBackRegAddrMode3";
+}
+
 class AI3stridx<bits<4> op, bit isByte, bit isPre, dag oops, dag iops,
                 IndexMode im, Format f, InstrItinClass itin, string opc,
                 string asm, string cstr, list<dag> pattern>
@@ -649,12 +677,25 @@
                string opc, string asm, string cstr, list<dag> pattern>
   : I<oops, iops, AddrMode3, Size4Bytes, IndexModePost, f, itin,
       opc, asm, cstr,pattern> {
+  // {13}     1 == imm8, 0 == Rm
+  // {12-9}   Rn
+  // {8}      isAdd
+  // {7-4}    imm7_4/zero
+  // {3-0}    imm3_0/Rm
+  bits<14> addr;
+  bits<4> Rt;
+  let Inst{3-0}   = addr{3-0};    // imm3_0/Rm
   let Inst{4}     = 1;
   let Inst{5}     = 1; // H bit
   let Inst{6}     = 0; // S bit
   let Inst{7}     = 1;
+  let Inst{11-8}  = addr{7-4};    // imm7_4/zero
+  let Inst{15-12} = Rt;           // Rt
+  let Inst{19-16} = addr{12-9};   // Rn
   let Inst{20}    = 0; // L bit
   let Inst{21}    = 0; // W bit
+  let Inst{22}    = addr{13};     // 1 == imm8, 0 == Rm
+  let Inst{23}    = addr{8};      // U bit
   let Inst{24}    = 0; // P bit
   let Inst{27-25} = 0b000;
 }
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index f7182c3..4aff2bb 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -475,6 +475,17 @@
 
 // Define ARM specific addressing modes.
 
+def MemMode2AsmOperand : AsmOperandClass {
+  let Name = "MemMode2";
+  let SuperClasses = [];
+  let ParserMethod = "tryParseMemMode2Operand";
+}
+
+def MemMode3AsmOperand : AsmOperandClass {
+  let Name = "MemMode3";
+  let SuperClasses = [];
+  let ParserMethod = "tryParseMemMode3Operand";
+}
 
 // addrmode_imm12 := reg +/- imm12
 //
@@ -498,12 +509,6 @@
   let MIOperandInfo = (ops GPR:$base, GPR:$offsreg, i32imm:$offsimm);
 }
 
-def MemMode2AsmOperand : AsmOperandClass {
-  let Name = "MemMode2";
-  let SuperClasses = [];
-  let ParserMethod = "tryParseMemMode2Operand";
-}
-
 // addrmode2 := reg +/- imm12
 //           := reg +/- reg shop imm
 //
@@ -530,6 +535,7 @@
                 ComplexPattern<i32, 3, "SelectAddrMode3", []> {
   let EncoderMethod = "getAddrMode3OpValue";
   let PrintMethod = "printAddrMode3Operand";
+  let ParserMatchClass = MemMode3AsmOperand;
   let MIOperandInfo = (ops GPR:$base, GPR:$offsreg, i32imm:$offsimm);
 }
 
@@ -1763,22 +1769,19 @@
   let Inst{11-0} = addr{11-0};
   let AsmMatchConverter = "CvtLdWriteBackRegAddrMode2";
 }
-def LDRSBT : AI3ldstidx<0b1101, 1, 1, 0, (outs GPR:$dst, GPR:$base_wb),
-                 (ins GPR:$base, am3offset:$offset), IndexModePost,
-                 LdMiscFrm, IIC_iLoad_bh_ru,
-                 "ldrsbt", "\t$dst, [$base], $offset", "$base = $base_wb", []> {
+def LDRSBT : AI3ldstidxT<0b1101, 1, 1, 0, (outs GPR:$Rt, GPR:$base_wb),
+             (ins addrmode3:$addr), IndexModePost, LdMiscFrm, IIC_iLoad_bh_ru,
+             "ldrsbt", "\t$Rt, $addr", "$addr.base = $base_wb", []> {
   let Inst{21} = 1; // overwrite
 }
-def LDRHT : AI3ldstidx<0b1011, 1, 1, 0, (outs GPR:$dst, GPR:$base_wb),
-                 (ins GPR:$base, am3offset:$offset), IndexModePost,
-                 LdMiscFrm, IIC_iLoad_bh_ru,
-                 "ldrht", "\t$dst, [$base], $offset", "$base = $base_wb", []> {
+def LDRHT  : AI3ldstidxT<0b1011, 1, 1, 0, (outs GPR:$Rt, GPR:$base_wb),
+             (ins addrmode3:$addr), IndexModePost, LdMiscFrm, IIC_iLoad_bh_ru,
+             "ldrht", "\t$Rt, $addr", "$addr.base = $base_wb", []> {
   let Inst{21} = 1; // overwrite
 }
-def LDRSHT : AI3ldstidx<0b1111, 1, 1, 0, (outs GPR:$dst, GPR:$base_wb),
-                 (ins GPR:$base, am3offset:$offset), IndexModePost,
-                 LdMiscFrm, IIC_iLoad_bh_ru,
-                 "ldrsht", "\t$dst, [$base], $offset", "$base = $base_wb", []> {
+def LDRSHT : AI3ldstidxT<0b1111, 1, 1, 0, (outs GPR:$Rt, GPR:$base_wb),
+             (ins addrmode3:$addr), IndexModePost, LdMiscFrm, IIC_iLoad_bh_ru,
+             "ldrsht", "\t$Rt, $addr", "$addr.base = $base_wb", []> {
   let Inst{21} = 1; // overwrite
 }
 }
@@ -1870,12 +1873,12 @@
   let AsmMatchConverter = "CvtStWriteBackRegAddrMode2";
 }
 
-def STRHT: AI3sthpo<(outs GPR:$base_wb),
-                    (ins GPR:$src, GPR:$base,am3offset:$offset),
+def STRHT: AI3sthpo<(outs GPR:$base_wb), (ins GPR:$Rt, addrmode3:$addr),
                     StMiscFrm, IIC_iStore_bh_ru,
-                    "strht", "\t$src, [$base], $offset", "$base = $base_wb",
+                    "strht", "\t$Rt, $addr", "$addr.base = $base_wb",
                     [/* For disassembly only; pattern left blank */]> {
   let Inst{21} = 1; // overwrite
+  let AsmMatchConverter = "CvtStWriteBackRegAddrMode3";
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 23d6125..05b2b46 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -98,12 +98,18 @@
     SmallVectorImpl<MCParsedAsmOperand*>&);
   OperandMatchResultTy tryParseMemMode2Operand(
     SmallVectorImpl<MCParsedAsmOperand*>&);
+  OperandMatchResultTy tryParseMemMode3Operand(
+    SmallVectorImpl<MCParsedAsmOperand*>&);
 
   // Asm Match Converter Methods
   bool CvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
                                   const SmallVectorImpl<MCParsedAsmOperand*> &);
   bool CvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
                                   const SmallVectorImpl<MCParsedAsmOperand*> &);
+  bool CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
+                                  const SmallVectorImpl<MCParsedAsmOperand*> &);
+  bool CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
+                                  const SmallVectorImpl<MCParsedAsmOperand*> &);
 
 public:
   ARMAsmParser(const Target &T, MCAsmParser &_Parser, TargetMachine &_TM)
@@ -371,6 +377,30 @@
 
     return true;
   }
+  bool isMemMode3() const {
+    if (getMemAddrMode() != ARMII::AddrMode3)
+      return false;
+
+    if (getMemOffsetIsReg()) {
+      if (getMemOffsetRegShifted())
+        return false; // No shift with offset reg allowed
+      return true;
+    }
+
+    if (getMemNegative() &&
+        !(getMemPostindexed() || getMemPreindexed()))
+      return false;
+
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
+    if (!CE) return false;
+    int64_t Value = CE->getValue();
+
+    // The offset must be in the range 0-255 (imm8).
+    if (Value > 255 || Value < -255)
+      return false;
+
+    return true;
+  }
   bool isMemMode5() const {
     if (!isMemory() || getMemOffsetIsReg() || getMemWriteback() ||
         getMemNegative())
@@ -539,6 +569,37 @@
                                           -Offset, ARM_AM::no_shift, IdxMode)));
   }
 
+  void addMemMode3Operands(MCInst &Inst, unsigned N) const {
+    assert(isMemMode3() && "Invalid mode or number of operands!");
+    Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
+    unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
+
+    if (getMemOffsetIsReg()) {
+      Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
+
+      ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
+      Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(AMOpc, 0,
+                                                             IdxMode)));
+      return;
+    }
+
+    // Create a operand placeholder to always yield the same number of operands.
+    Inst.addOperand(MCOperand::CreateReg(0));
+
+    // FIXME: #-0 is encoded differently than #0. Does the parser preserve
+    // the difference?
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
+    assert(CE && "Non-constant mode 3 offset operand!");
+    int64_t Offset = CE->getValue();
+
+    if (Offset >= 0)
+      Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::add,
+                                           Offset, IdxMode)));
+    else
+      Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::sub,
+                                           -Offset, IdxMode)));
+  }
+
   void addMemMode5Operands(MCInst &Inst, unsigned N) const {
     assert(N == 2 && isMemMode5() && "Invalid number of operands!");
 
@@ -1219,6 +1280,17 @@
   return MatchOperand_Success;
 }
 
+/// tryParseMemMode3Operand - Try to parse memory addressing mode 3 operand.
+ARMAsmParser::OperandMatchResultTy ARMAsmParser::
+tryParseMemMode3Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
+
+  if (ParseMemory(Operands, ARMII::AddrMode3))
+    return MatchOperand_NoMatch;
+
+  return MatchOperand_Success;
+}
+
 /// CvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
 /// when they refer multiple MIOperands inside a single one.
@@ -1249,6 +1321,36 @@
   return true;
 }
 
+/// CvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
+/// Needed here because the Asm Gen Matcher can't handle properly tied operands
+/// when they refer multiple MIOperands inside a single one.
+bool ARMAsmParser::
+CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
+                         const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
+
+  // Create a writeback register dummy placeholder.
+  Inst.addOperand(MCOperand::CreateImm(0));
+
+  ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
+  ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
+  return true;
+}
+
+/// CvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
+/// Needed here because the Asm Gen Matcher can't handle properly tied operands
+/// when they refer multiple MIOperands inside a single one.
+bool ARMAsmParser::
+CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
+                         const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  // Create a writeback register dummy placeholder.
+  Inst.addOperand(MCOperand::CreateImm(0));
+  ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
+  ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
+  ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
+  return true;
+}
+
 /// Parse an ARM memory expression, return false if successful else return true
 /// or an error.  The first token must be a '[' when called.
 ///
@@ -1310,6 +1412,10 @@
 
     const AsmToken &ExclaimTok = Parser.getTok();
     if (ExclaimTok.is(AsmToken::Exclaim)) {
+      // None of addrmode3 instruction uses "!"
+      if (AddrMode == ARMII::AddrMode3)
+        return true;
+
       WBOp = ARMOperand::CreateToken(ExclaimTok.getString(),
                                      ExclaimTok.getLoc());
       Writeback = true;
@@ -1350,6 +1456,11 @@
   if (!OffsetIsReg) {
     if (!Offset)
       Offset = MCConstantExpr::Create(0, getContext());
+  } else {
+    if (AddrMode == ARMII::AddrMode3 && OffsetRegShifted) {
+      Error(E, "shift amount not supported");
+      return true;
+    }
   }
 
   Operands.push_back(ARMOperand::CreateMem(AddrMode, BaseRegNum, OffsetIsReg,
diff --git a/lib/Target/ARM/Disassembler/ARMDisassemblerCore.cpp b/lib/Target/ARM/Disassembler/ARMDisassemblerCore.cpp
index 27683e3..29f1e22 100644
--- a/lib/Target/ARM/Disassembler/ARMDisassemblerCore.cpp
+++ b/lib/Target/ARM/Disassembler/ARMDisassemblerCore.cpp
@@ -1237,19 +1237,22 @@
          "Expect 1 reg operand followed by 1 imm operand");
 
   ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
+  unsigned IndexMode =
+                  (TID.TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift;
   if (getAM3IBit(insn) == 1) {
     MI.addOperand(MCOperand::CreateReg(0));
 
     // Disassemble the 8-bit immediate offset.
     unsigned Imm4H = (insn >> ARMII::ImmHiShift) & 0xF;
     unsigned Imm4L = insn & 0xF;
-    unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, (Imm4H << 4) | Imm4L);
+    unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, (Imm4H << 4) | Imm4L,
+                                        IndexMode);
     MI.addOperand(MCOperand::CreateImm(Offset));
   } else {
     // Disassemble the offset reg (Rm).
     MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
                                                        decodeRm(insn))));
-    unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, 0);
+    unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, 0, IndexMode);
     MI.addOperand(MCOperand::CreateImm(Offset));
   }
   OpIdx += 2;
diff --git a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
index eb7e5639..f080fa8 100644
--- a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
+++ b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
@@ -181,6 +181,10 @@
   }
 }
 
+//===--------------------------------------------------------------------===//
+// Addressing Mode #2
+//===--------------------------------------------------------------------===//
+
 void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
                                                 raw_ostream &O) {
   const MCOperand &MO1 = MI->getOperand(Op);
@@ -276,11 +280,35 @@
     << " #" << ShImm;
 }
 
-void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned OpNum,
-                                           raw_ostream &O) {
-  const MCOperand &MO1 = MI->getOperand(OpNum);
-  const MCOperand &MO2 = MI->getOperand(OpNum+1);
-  const MCOperand &MO3 = MI->getOperand(OpNum+2);
+//===--------------------------------------------------------------------===//
+// Addressing Mode #3
+//===--------------------------------------------------------------------===//
+
+void ARMInstPrinter::printAM3PostIndexOp(const MCInst *MI, unsigned Op,
+                                         raw_ostream &O) {
+  const MCOperand &MO1 = MI->getOperand(Op);
+  const MCOperand &MO2 = MI->getOperand(Op+1);
+  const MCOperand &MO3 = MI->getOperand(Op+2);
+
+  O << "[" << getRegisterName(MO1.getReg()) << "], ";
+
+  if (MO2.getReg()) {
+    O << (char)ARM_AM::getAM3Op(MO3.getImm())
+    << getRegisterName(MO2.getReg());
+    return;
+  }
+
+  unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
+  O << '#'
+    << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
+    << ImmOffs;
+}
+
+void ARMInstPrinter::printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
+                                                raw_ostream &O) {
+  const MCOperand &MO1 = MI->getOperand(Op);
+  const MCOperand &MO2 = MI->getOperand(Op+1);
+  const MCOperand &MO3 = MI->getOperand(Op+2);
 
   O << '[' << getRegisterName(MO1.getReg());
 
@@ -297,6 +325,18 @@
   O << ']';
 }
 
+void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned Op,
+                                           raw_ostream &O) {
+  const MCOperand &MO3 = MI->getOperand(Op+2);
+  unsigned IdxMode = ARM_AM::getAM3IdxMode(MO3.getImm());
+
+  if (IdxMode == ARMII::IndexModePost) {
+    printAM3PostIndexOp(MI, Op, O);
+    return;
+  }
+  printAM3PreOrOffsetIndexOp(MI, Op, O);
+}
+
 void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
                                                  unsigned OpNum,
                                                  raw_ostream &O) {
diff --git a/lib/Target/ARM/InstPrinter/ARMInstPrinter.h b/lib/Target/ARM/InstPrinter/ARMInstPrinter.h
index e752b20..b3ac03a 100644
--- a/lib/Target/ARM/InstPrinter/ARMInstPrinter.h
+++ b/lib/Target/ARM/InstPrinter/ARMInstPrinter.h
@@ -49,9 +49,14 @@
                                   raw_ostream &O);
   void printAddrMode2OffsetOperand(const MCInst *MI, unsigned OpNum,
                                    raw_ostream &O);
+
   void printAddrMode3Operand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
+  void printAM3PostIndexOp(const MCInst *MI, unsigned OpNum, raw_ostream &O);
+  void printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned OpNum,
+                                  raw_ostream &O);
   void printAddrMode3OffsetOperand(const MCInst *MI, unsigned OpNum,
                                    raw_ostream &O);
+
   void printLdStmModeOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
   void printAddrMode5Operand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
   void printAddrMode6Operand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
diff --git a/test/MC/ARM/arm_addrmode3.s b/test/MC/ARM/arm_addrmode3.s
new file mode 100644
index 0000000..0b9639e
--- /dev/null
+++ b/test/MC/ARM/arm_addrmode3.s
@@ -0,0 +1,18 @@
+@ RUN: llvm-mc -mcpu=cortex-a8 -triple arm-unknown-unknown -show-encoding %s | FileCheck %s
+
+@ CHECK: ldrsbt  r1, [r0], +r2 @ encoding: [0xd2,0x10,0xb0,0xe0]
+@ CHECK: ldrsbt  r1, [r0], #4 @ encoding: [0xd4,0x10,0xf0,0xe0]
+@ CHECK: ldrsht  r1, [r0], +r2 @ encoding: [0xf2,0x10,0xb0,0xe0]
+@ CHECK: ldrsht  r1, [r0], #4 @ encoding: [0xf4,0x10,0xf0,0xe0]
+@ CHECK: ldrht  r1, [r0], +r2 @ encoding: [0xb2,0x10,0xb0,0xe0]
+@ CHECK: ldrht  r1, [r0], #4 @ encoding: [0xb4,0x10,0xf0,0xe0]
+@ CHECK: strht  r1, [r0], +r2 @ encoding: [0xb2,0x10,0xa0,0xe0]
+@ CHECK: strht  r1, [r0], #4 @ encoding: [0xb4,0x10,0xe0,0xe0]
+        ldrsbt  r1, [r0], r2
+        ldrsbt  r1, [r0], #4
+        ldrsht  r1, [r0], r2
+        ldrsht  r1, [r0], #4
+        ldrht  r1, [r0], r2
+        ldrht  r1, [r0], #4
+        strht  r1, [r0], r2
+        strht  r1, [r0], #4