diff --git a/llvm/include/llvm/MC/MCAsmInfo.h b/llvm/include/llvm/MC/MCAsmInfo.h
--- a/llvm/include/llvm/MC/MCAsmInfo.h
+++ b/llvm/include/llvm/MC/MCAsmInfo.h
@@ -449,6 +449,9 @@
   // %hi(), and similar unary operators.
   bool HasMipsExpressions = false;
 
+  // If true, use Motorola-style integers in Assembly (ex. $0ac).
+  bool UseMotorolaIntegers = false;
+
   // If true, emit function descriptor symbol on AIX.
   bool NeedsFunctionDescriptors = false;
 
@@ -740,6 +743,7 @@
   void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
   bool hasMipsExpressions() const { return HasMipsExpressions; }
   bool needsFunctionDescriptors() const { return NeedsFunctionDescriptors; }
+  bool shouldUseMotorolaIntegers() const { return UseMotorolaIntegers; }
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/MC/MCParser/MCAsmLexer.h b/llvm/include/llvm/MC/MCParser/MCAsmLexer.h
--- a/llvm/include/llvm/MC/MCParser/MCAsmLexer.h
+++ b/llvm/include/llvm/MC/MCParser/MCAsmLexer.h
@@ -53,6 +53,7 @@
   bool LexMasmHexFloats = false;
   bool LexMasmIntegers = false;
   bool LexMasmStrings = false;
+  bool LexMotorolaIntegers = false;
   bool UseMasmDefaultRadix = false;
   unsigned DefaultRadix = 10;
   AsmCommentConsumer *CommentConsumer = nullptr;
@@ -171,6 +172,10 @@
   /// Set whether to lex masm-style string literals, such as 'Can''t find file'
   /// and "This ""value"" not found".
   void setLexMasmStrings(bool V) { LexMasmStrings = V; }
+
+  /// Set whether to lex Motorola-style integer literals, such as $deadbeef or
+  /// %01010110.
+  void setLexMotorolaIntegers(bool V) { LexMotorolaIntegers = V; }
 };
 
 } // end namespace llvm
diff --git a/llvm/lib/MC/MCParser/AsmLexer.cpp b/llvm/lib/MC/MCParser/AsmLexer.cpp
--- a/llvm/lib/MC/MCParser/AsmLexer.cpp
+++ b/llvm/lib/MC/MCParser/AsmLexer.cpp
@@ -33,6 +33,7 @@
 
 AsmLexer::AsmLexer(const MCAsmInfo &MAI) : MAI(MAI) {
   AllowAtInIdentifier = !StringRef(MAI.getCommentString()).startswith("@");
+  LexMotorolaIntegers = MAI.shouldUseMotorolaIntegers();
 }
 
 AsmLexer::~AsmLexer() = default;
@@ -422,6 +423,32 @@
     return intToken(Result, Value);
   }
 
+  // Motorola hex integers: $[0-9a-fA-F]+
+  if (LexMotorolaIntegers && CurPtr[-1] == '$') {
+    const char *NumStart = CurPtr;
+    while (isHexDigit(CurPtr[0]))
+      ++CurPtr;
+
+    APInt Result(128, 0);
+    if (StringRef(NumStart, CurPtr - NumStart).getAsInteger(16, Result))
+      return ReturnError(TokStart, "invalid hexadecimal number");
+
+    return intToken(StringRef(TokStart, CurPtr - TokStart), Result);
+  }
+
+  // Motorola binary integers: %[01]+
+  if (LexMotorolaIntegers && CurPtr[-1] == '%') {
+    const char *NumStart = CurPtr;
+    while (*CurPtr == '0' || *CurPtr == '1')
+      ++CurPtr;
+
+    APInt Result(128, 0);
+    if (StringRef(NumStart, CurPtr - NumStart).getAsInteger(2, Result))
+      return ReturnError(TokStart, "invalid binary number");
+
+    return intToken(StringRef(TokStart, CurPtr - TokStart), Result);
+  }
+
   // Decimal integer: [1-9][0-9]*
   if (CurPtr[-1] != '0' || CurPtr[0] == '.') {
     unsigned Radix = doHexLookAhead(CurPtr, 10, LexMasmIntegers);
@@ -780,7 +807,12 @@
   case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
   case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
   case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
-  case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
+  case '$':
+    if (LexMotorolaIntegers && isHexDigit(*CurPtr)) {
+      return LexDigit();
+    }
+
+    return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
   case '@': return AsmToken(AsmToken::At, StringRef(TokStart, 1));
   case '\\': return AsmToken(AsmToken::BackSlash, StringRef(TokStart, 1));
   case '=':
@@ -815,6 +847,10 @@
     }
     return AsmToken(AsmToken::Exclaim, StringRef(TokStart, 1));
   case '%':
+    if (LexMotorolaIntegers && (*CurPtr == '0' || *CurPtr == '1')) {
+      return LexDigit();
+    }
+
     if (MAI.hasMipsExpressions()) {
       AsmToken::TokenKind Operator;
       unsigned OperatorLength;
diff --git a/llvm/test/MC/AsmParser/motorola_integers.s b/llvm/test/MC/AsmParser/motorola_integers.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/AsmParser/motorola_integers.s
@@ -0,0 +1,10 @@
+# RUN: llvm-mc -triple i386-unknown-unknown -motorola-integers %s | FileCheck %s
+
+# CHECK: .set a, 2882400009
+.set a, $aBcDeF09
+# CHECK: .set b, 256
+.set b, $0100
+# CHECK: .set c, 10
+.set c, %01010
+# CHECK: .set d, 1
+.set d, %1
diff --git a/llvm/tools/llvm-mc/llvm-mc.cpp b/llvm/tools/llvm-mc/llvm-mc.cpp
--- a/llvm/tools/llvm-mc/llvm-mc.cpp
+++ b/llvm/tools/llvm-mc/llvm-mc.cpp
@@ -173,6 +173,10 @@
     "masm-hexfloats",
     cl::desc("Enable MASM-style hex float initializers (3F800000r)"));
 
+static cl::opt<bool> LexMotorolaIntegers(
+    "motorola-integers",
+    cl::desc("Enable binary and hex Motorola integers (%110 and $ABC)"));
+
 static cl::opt<bool> NoExecStack("no-exec-stack",
                                  cl::desc("File doesn't need an exec stack"));
 
@@ -305,6 +309,7 @@
   Parser->setTargetParser(*TAP);
   Parser->getLexer().setLexMasmIntegers(LexMasmIntegers);
   Parser->getLexer().setLexMasmHexFloats(LexMasmHexFloats);
+  Parser->getLexer().setLexMotorolaIntegers(LexMotorolaIntegers);
 
   int Res = Parser->Run(NoInitialTextSection);