Index: lib/Target/Mips/AsmParser/MipsAsmParser.cpp
===================================================================
--- lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -879,6 +879,9 @@
   bool isConstantImm() const {
     return isImm() && dyn_cast<MCConstantExpr>(getImm());
   }
+  template <unsigned Bits> bool isUImm() const {
+    return isImm() && isConstantImm() && isUInt<Bits>(getConstantImm());
+  }
   bool isToken() const override {
     // Note: It's not possible to pretend that other operand kinds are tokens.
     // The matcher emitter checks tokens first.
Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -384,7 +384,15 @@
 def uimm20      : Operand<i32> {
 }
 
+def MipsUImm10AsmOperand : AsmOperandClass {
+  let Name = "UImm10";
+  let RenderMethod = "addImmOperands";
+  let ParserMethod = "parseImm";
+  let PredicateMethod = "isUImm<10>";
+}
+
 def uimm10      : Operand<i32> {
+  let ParserMatchClass = MipsUImm10AsmOperand;
 }
 
 def simm16_64   : Operand<i64> {
Index: test/MC/Mips/micromips-invalid.s
===================================================================
--- test/MC/Mips/micromips-invalid.s
+++ test/MC/Mips/micromips-invalid.s
@@ -73,3 +73,8 @@
   movep   $8, $6, $2, $3  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
   movep   $5, $6, $5, $3  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
   movep   $5, $6, $2, $9  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  break 1024        # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  break 1024, 5     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  break 7, 1024     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  break 1024, 1024  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  wait 1024         # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
Index: test/MC/Mips/mips32r6/invalid.s
===================================================================
--- test/MC/Mips/mips32r6/invalid.s
+++ test/MC/Mips/mips32r6/invalid.s
@@ -12,3 +12,7 @@
         ldc2    $8,-21181($at)   # ASM: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
         sdc2    $20,23157($s2)   # ASM: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
         swc2    $25,24880($s0)   # ASM: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+        break 1024        # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 1024, 5     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 7, 1024     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 1024, 1024  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
Index: test/MC/Mips/mips64r6/invalid.s
===================================================================
--- test/MC/Mips/mips64r6/invalid.s
+++ test/MC/Mips/mips64r6/invalid.s
@@ -10,3 +10,7 @@
         jalr.hb $31 # ASM: :[[@LINE]]:9: error: source and destination must be different
         jalr.hb $31, $31 # ASM: :[[@LINE]]:9: error: source and destination must be different
         ldc2    $8,-21181($at)   # ASM: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+        break 1024        # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 1024, 5     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 7, 1024     # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+        break 1024, 1024  # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction