diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index d6b2ad418e4..a23f5a298a3 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -2345,16 +2345,16 @@ ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
     }
   }
 
-  // Transform "outs[bwl] %ds:(%esi), %dx" into "out[bwl]"
-  if (Name.startswith("outs") && Operands.size() == 3 &&
-      (Name == "outsb" || Name == "outsw" || Name == "outsl")) {
-    X86Operand &Op = *(X86Operand*)Operands.begin()[1];
-    X86Operand &Op2 = *(X86Operand*)Operands.begin()[2];
-    if (isSrcOp(Op) && Op2.isReg() && Op2.getReg() == X86::DX) {
-      Operands.pop_back();
-      Operands.pop_back();
-      delete &Op;
-      delete &Op2;
+  // Append default arguments to "outs[bwld]"
+  if (Name.startswith("outs") && Operands.size() == 1 &&
+      (Name == "outsb" || Name == "outsw" || Name == "outsl" ||
+       Name == "outsd" )) {
+    if (isParsingIntelSyntax()) {
+      Operands.push_back(DefaultMemSIOperand(NameLoc));
+      Operands.push_back(X86Operand::CreateReg(X86::DX, NameLoc, NameLoc));
+    } else {
+      Operands.push_back(DefaultMemSIOperand(NameLoc));
+      Operands.push_back(X86Operand::CreateReg(X86::DX, NameLoc, NameLoc));
     }
   }
 
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 13c310290aa..2885bb54fca 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -1772,9 +1772,12 @@ def LODSQ : RI<0xAD, RawFrmSrc, (outs), (ins srcidx64:$src),
 }
 
 let SchedRW = [WriteSystem] in {
-def OUTSB : I<0x6E, RawFrm, (outs), (ins), "outsb", [], IIC_OUTS>;
-def OUTSW : I<0x6F, RawFrm, (outs), (ins), "outsw", [], IIC_OUTS>, OpSize;
-def OUTSL : I<0x6F, RawFrm, (outs), (ins), "outs{l|d}", [], IIC_OUTS>, OpSize16;
+def OUTSB : I<0x6E, RawFrmSrc, (outs), (ins srcidx8:$src),
+             "outsb\t{$src, %dx|dx, $src}", [], IIC_OUTS>;
+def OUTSW : I<0x6F, RawFrmSrc, (outs), (ins srcidx16:$src),
+              "outsw\t{$src, %dx|dx, $src}", [], IIC_OUTS>, OpSize;
+def OUTSL : I<0x6F, RawFrmSrc, (outs), (ins srcidx32:$src),
+              "outs{l|d}\t{$src, %dx|dx, $src}", [], IIC_OUTS>, OpSize16;
 }
 
 // Flag instructions
diff --git a/test/MC/X86/index-operations.s b/test/MC/X86/index-operations.s
index bf6d87fb2b8..85bae21eae1 100644
--- a/test/MC/X86/index-operations.s
+++ b/test/MC/X86/index-operations.s
@@ -129,3 +129,13 @@ movsl %gs:(%esi), (%edi)
 // 64: movsl %gs:(%esi), %es:(%edi) # encoding: [0x65,0x67,0xa5]
 // 32: movsl %gs:(%esi), %es:(%edi) # encoding: [0x65,0xa5]
 // 16: movsl %gs:(%esi), %es:(%edi) # encoding: [0x66,0x65,0x67,0xa5]
+
+outsb
+// 64: outsb (%rsi), %dx # encoding: [0x6e]
+// 32: outsb (%esi), %dx # encoding: [0x6e]
+// 16: outsb (%si), %dx # encoding: [0x6e]
+
+outsw %fs:(%esi), %dx
+// 64: outsw %fs:(%esi), %dx # encoding: [0x66,0x64,0x67,0x6f]
+// 32: outsw %fs:(%esi), %dx # encoding: [0x66,0x64,0x6f]
+// 16: outsw %fs:(%esi), %dx # encoding: [0x64,0x67,0x6f]
diff --git a/test/MC/X86/x86-16.s b/test/MC/X86/x86-16.s
index ae700fa771e..a147cddb850 100644
--- a/test/MC/X86/x86-16.s
+++ b/test/MC/X86/x86-16.s
@@ -789,21 +789,21 @@ pshufw $90, %mm4, %mm0
 // CHECK: encoding: [0xe0,A]
 	loopnz 0
 
-// CHECK: outsb # encoding: [0x6e]
+// CHECK: outsb (%si), %dx # encoding: [0x6e]
 // CHECK: outsb
 // CHECK: outsb
 	outsb
 	outsb	%ds:(%si), %dx
 	outsb	(%si), %dx
 
-// CHECK: outsw # encoding: [0x6f]
+// CHECK: outsw (%si), %dx # encoding: [0x6f]
 // CHECK: outsw
 // CHECK: outsw
 	outsw
 	outsw	%ds:(%si), %dx
 	outsw	(%si), %dx
 
-// CHECK: outsl # encoding: [0x66,0x6f]
+// CHECK: outsl (%si), %dx # encoding: [0x66,0x6f]
 // CHECK: outsl
 	outsl
 	outsl	%ds:(%si), %dx
diff --git a/test/MC/X86/x86-32.s b/test/MC/X86/x86-32.s
index 3d75c6fefa7..cb5a36a1255 100644
--- a/test/MC/X86/x86-32.s
+++ b/test/MC/X86/x86-32.s
@@ -865,21 +865,21 @@ pshufw $90, %mm4, %mm0
 // CHECK: encoding: [0xe0,A]
 	loopnz 0
 
-// CHECK: outsb # encoding: [0x6e]
+// CHECK: outsb (%esi), %dx # encoding: [0x6e]
 // CHECK: outsb
 // CHECK: outsb
 	outsb
 	outsb	%ds:(%esi), %dx
 	outsb	(%esi), %dx
 
-// CHECK: outsw # encoding: [0x66,0x6f]
+// CHECK: outsw (%esi), %dx # encoding: [0x66,0x6f]
 // CHECK: outsw
 // CHECK: outsw
 	outsw
 	outsw	%ds:(%esi), %dx
 	outsw	(%esi), %dx
 
-// CHECK: outsl # encoding: [0x6f]
+// CHECK: outsl (%esi), %dx # encoding: [0x6f]
 // CHECK: outsl
 	outsl
 	outsl	%ds:(%esi), %dx
diff --git a/test/MC/X86/x86-64.s b/test/MC/X86/x86-64.s
index e39cefee849..f6763518367 100644
--- a/test/MC/X86/x86-64.s
+++ b/test/MC/X86/x86-64.s
@@ -1050,21 +1050,21 @@ xsetbv // CHECK: xsetbv # encoding: [0x0f,0x01,0xd1]
 // CHECK: encoding: [0xe0,A]
 	loopnz 0
 
-// CHECK: outsb # encoding: [0x6e]
+// CHECK: outsb (%rsi), %dx # encoding: [0x6e]
 // CHECK: outsb
 // CHECK: outsb
 	outsb
 	outsb	%ds:(%rsi), %dx
 	outsb	(%rsi), %dx
 
-// CHECK: outsw # encoding: [0x66,0x6f]
+// CHECK: outsw (%rsi), %dx # encoding: [0x66,0x6f]
 // CHECK: outsw
 // CHECK: outsw
 	outsw
 	outsw	%ds:(%rsi), %dx
 	outsw	(%rsi), %dx
 
-// CHECK: outsl # encoding: [0x6f]
+// CHECK: outsl (%rsi), %dx # encoding: [0x6f]
 // CHECK: outsl
 	outsl
 	outsl	%ds:(%rsi), %dx