Index: lib/Target/Mips/AsmParser/MipsAsmParser.cpp
===================================================================
--- lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -3732,6 +3732,9 @@
   case Match_UImm5_0:
     return Error(RefineErrorLoc(IDLoc, Operands, ErrorInfo),
                  "expected 5-bit unsigned immediate");
+  case Match_SImm5_0:
+    return Error(RefineErrorLoc(IDLoc, Operands, ErrorInfo),
+                 "expected 5-bit signed immediate");
   case Match_UImm5_1:
     return Error(RefineErrorLoc(IDLoc, Operands, ErrorInfo),
                  "expected immediate in range 1 .. 32");
Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -503,8 +503,10 @@
           5, [ConstantUImm5Plus32NormalizeAsmOperandClass], 1>;
 def ConstantUImm5AsmOperandClass
     : ConstantUImmAsmOperandClass<5, [ConstantUImm5Plus1AsmOperandClass]>;
+def ConstantSImm5AsmOperandClass
+    : ConstantSImmAsmOperandClass<5, [ConstantUImm5AsmOperandClass]>;
 def ConstantUImm4AsmOperandClass
-    : ConstantUImmAsmOperandClass<4, [ConstantUImm5AsmOperandClass]>;
+    : ConstantUImmAsmOperandClass<4, [ConstantSImm5AsmOperandClass]>;
 def ConstantSImm4AsmOperandClass
     : ConstantSImmAsmOperandClass<4, [ConstantUImm4AsmOperandClass]>;
 def ConstantUImm3AsmOperandClass
@@ -720,7 +722,7 @@
   }
 
 // Signed operands
-foreach I = {4} in
+foreach I = {4, 5} in
   def simm # I : Operand<i32> {
     let DecoderMethod = "DecodeSImmWithOffset<" # I # ">";
     let ParserMatchClass =
Index: lib/Target/Mips/MipsMSAInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsMSAInstrInfo.td
+++ lib/Target/Mips/MipsMSAInstrInfo.td
@@ -71,7 +71,6 @@
 
 // Operands
 
-def simm5 : Operand<i32>;
 
 def vsplat_simm5 : Operand<vAny>;
 
Index: test/MC/Mips/micromips32r6/valid.s
===================================================================
--- test/MC/Mips/micromips32r6/valid.s
+++ test/MC/Mips/micromips32r6/valid.s
@@ -80,6 +80,7 @@
   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]
   sw $4, 124($sp)          # CHECK: sw $4, 124($sp)     # encoding: [0xc8,0x9f]
+  sw $4, 128($sp)          # CHECK: sw $4, 128($sp)     # encoding: [0xf8,0x9d,0x00,0x80]
   sw16 $4, 4($17)          # CHECK: sw16 $4, 4($17)     # encoding: [0xea,0x11]
   sw16 $0, 4($17)          # CHECK: sw16 $zero, 4($17)  # encoding: [0xe8,0x11]
   swm $16, $17, $ra, 8($sp)   # CHECK: swm16 $16, $17, $ra, 8($sp) # encoding: [0x45,0x2a]
@@ -189,6 +190,8 @@
   rsqrt.d $f2, $f4         # CHECK: rsqrt.d $f2, $f4    # encoding: [0x54,0x44,0x42,0x3b]
   lw $3, 32($gp)           # CHECK: lw $3, 32($gp)      # encoding: [0x65,0x88]
   lw $3, 24($sp)           # CHECK: lw $3, 24($sp)      # encoding: [0x48,0x66]
+  lw $3, 124($sp)          # CHECK: lw $3, 124($sp)     # encoding: [0x48,0x7f]
+  lw $3, 128($sp)          # CHECK: lw $3, 128($sp)     # encoding: [0xfc,0x7d,0x00,0x80]
   lw16 $4, 8($17)          # CHECK: lw16 $4, 8($17)     # encoding: [0x6a,0x12]
   lhu16 $3, 4($16)         # CHECK: lhu16 $3, 4($16)    # encoding: [0x29,0x82]
   lbu16 $3, 4($17)         # CHECK: lbu16 $3, 4($17)    # encoding: [0x09,0x94]