diff --git a/llvm/lib/Target/AArch64/AArch64InstrFormats.td b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
index e35d49bbd41d..95c01c7198ae 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrFormats.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
@@ -257,6 +257,7 @@ def am_indexed7s128 : ComplexPattern<i64, 2, "SelectAddrModeIndexed7S128", []>;
 class AsmImmRange<int Low, int High> : AsmOperandClass {
   let Name = "Imm" # Low # "_" # High;
   let DiagnosticType = "InvalidImm" # Low # "_" # High;
+  let PredicateMethod = "isImmInRange<" # Low # "," # High # ">";
 }
 
 def Imm1_8Operand : AsmImmRange<1, 8>;
@@ -500,7 +501,8 @@ def imm0_65535 : Operand<i32>, ImmLeaf<i32, [{
 }
 
 // imm0_255 predicate - True if the immediate is in the range [0,255].
-def Imm0_255Operand : AsmOperandClass { let Name = "Imm0_255"; }
+def Imm0_255Operand : AsmImmRange<0,255>;
+
 def imm0_255 : Operand<i32>, ImmLeaf<i32, [{
   return ((uint32_t)Imm) < 256;
 }]> {
@@ -1166,11 +1168,12 @@ def am_tbrcond : Operand<OtherVT> {
 // AsmOperand classes to emit (or not) special diagnostics
 def TBZImm0_31Operand : AsmOperandClass {
   let Name = "TBZImm0_31";
-  let PredicateMethod = "isImm0_31";
+  let PredicateMethod = "isImmInRange<0,31>";
   let RenderMethod = "addImm0_31Operands";
 }
 def TBZImm32_63Operand : AsmOperandClass {
   let Name = "Imm32_63";
+  let PredicateMethod = "isImmInRange<32,63>";
   let DiagnosticType = "InvalidImm0_63";
 }
 
diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index b86a283b40d4..3ed3c880631d 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -537,154 +537,15 @@ public:
     return (Val % Scale) == 0 && Val >= 0 && (Val / Scale) < 0x1000;
   }
 
-  bool isImm0_1() const {
+  template <int N, int M>
+  bool isImmInRange() const {
     if (!isImm())
       return false;
     const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
     if (!MCE)
       return false;
     int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 2);
-  }
-
-  bool isImm0_7() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 8);
-  }
-
-  bool isImm1_8() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val > 0 && Val < 9);
-  }
-
-  bool isImm0_15() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 16);
-  }
-
-  bool isImm1_16() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val > 0 && Val < 17);
-  }
-
-  bool isImm0_31() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 32);
-  }
-
-  bool isImm1_31() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 1 && Val < 32);
-  }
-
-  bool isImm1_32() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 1 && Val < 33);
-  }
-
-  bool isImm0_63() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 64);
-  }
-
-  bool isImm1_63() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 1 && Val < 64);
-  }
-
-  bool isImm1_64() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 1 && Val < 65);
-  }
-
-  bool isImm0_127() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 128);
-  }
-
-  bool isImm0_255() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 256);
-  }
-
-  bool isImm0_65535() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 0 && Val < 65536);
-  }
-
-  bool isImm32_63() const {
-    if (!isImm())
-      return false;
-    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
-    if (!MCE)
-      return false;
-    int64_t Val = MCE->getValue();
-    return (Val >= 32 && Val < 64);
+    return (Val >= N && Val <= M);
   }
 
   bool isLogicalImm32() const {
@@ -3696,6 +3557,8 @@ bool AArch64AsmParser::showMatchError(SMLoc Loc, unsigned ErrCode) {
     return Error(Loc, "immediate must be an integer in range [0, 63].");
   case Match_InvalidImm0_127:
     return Error(Loc, "immediate must be an integer in range [0, 127].");
+  case Match_InvalidImm0_255:
+    return Error(Loc, "immediate must be an integer in range [0, 255].");
   case Match_InvalidImm0_65535:
     return Error(Loc, "immediate must be an integer in range [0, 65535].");
   case Match_InvalidImm1_8:
@@ -4120,6 +3983,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
   case Match_InvalidImm0_31:
   case Match_InvalidImm0_63:
   case Match_InvalidImm0_127:
+  case Match_InvalidImm0_255:
   case Match_InvalidImm0_65535:
   case Match_InvalidImm1_8:
   case Match_InvalidImm1_16:
diff --git a/llvm/test/MC/AArch64/neon-diagnostics.s b/llvm/test/MC/AArch64/neon-diagnostics.s
index a51243dfb344..1172903b0342 100644
--- a/llvm/test/MC/AArch64/neon-diagnostics.s
+++ b/llvm/test/MC/AArch64/neon-diagnostics.s
@@ -81,7 +81,7 @@
 // CHECK-ERROR: error: invalid operand for instruction
 // CHECK-ERROR:         and v0.8b, v1.16b, v2.8b
 // CHECK-ERROR:                       ^
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         orr v0.4h, v1.4h, v2.4h
 // CHECK-ERROR:                ^
 // CHECK-ERROR: error: invalid operand for instruction
@@ -152,10 +152,10 @@
       // invalid vector type (2s, 4s, 4h, 8h)
       movi v5.8b, #1, lsl #8
 
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:          movi v0.2s, #-1
 // CHECK-ERROR:                      ^
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         mvni v1.4s, #256
 // CHECK-ERROR:                     ^
 // CHECK-ERROR: error: invalid operand for instruction
@@ -183,10 +183,10 @@
       // invalid vector type (2s, 4s)
       movi v5.4h, #31, msl #8
 
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         movi v0.2s, #-1, msl #8
 // CHECK-ERROR:                     ^
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         mvni v7.4s, #256, msl #16
 // CHECK-ERROR:                     ^
 // CHECK-ERROR: error: invalid operand for instruction
@@ -206,10 +206,10 @@
         movi v0.8b, #-1
         movi v1.16b, #256
 
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         movi v0.8b, #-1
 // CHECK-ERROR:                     ^
-// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR: error: immediate must be an integer in range [0, 255]
 // CHECK-ERROR:         movi v1.16b, #256
 // CHECK-ERROR:                      ^