diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -3284,6 +3284,8 @@
     {"sme", {AArch64::FeatureSME}},
     {"sme-f64", {AArch64::FeatureSMEF64}},
     {"sme-i64", {AArch64::FeatureSMEI64}},
+    {"hbc", {AArch64::FeatureHBC}},
+    {"mops", {AArch64::FeatureMOPS}},
     // FIXME: Unsupported extensions
     {"lor", {}},
     {"rdma", {}},
diff --git a/llvm/test/MC/AArch64/directive-arch_extension-negative.s b/llvm/test/MC/AArch64/directive-arch_extension-negative.s
--- a/llvm/test/MC/AArch64/directive-arch_extension-negative.s
+++ b/llvm/test/MC/AArch64/directive-arch_extension-negative.s
@@ -1,5 +1,5 @@
 // RUN: not llvm-mc -triple aarch64 \
-// RUN: -mattr=+crc,+sm4,+sha3,+sha2,+aes,+fp,+neon,+ras,+lse,+predres,+ccdp,+mte,+tlb-rmi,+pan-rwv,+ccpp,+rcpc,+ls64,+flagm \
+// RUN: -mattr=+crc,+sm4,+sha3,+sha2,+aes,+fp,+neon,+ras,+lse,+predres,+ccdp,+mte,+tlb-rmi,+pan-rwv,+ccpp,+rcpc,+ls64,+flagm,+hbc,+mops \
 // RUN: -filetype asm -o - %s 2>&1 | FileCheck %s
 
 .arch_extension axp64
@@ -131,3 +131,18 @@
 cfinv
 // CHECK: [[@LINE-1]]:1: error: instruction requires: flagm
 // CHECK-NEXT: cfinv
+
+lbl:
+bc.eq lbl
+// CHECK-NOT: [[@LINE-1]]:1: error: instruction requires: hbc
+.arch_extension nohbc
+bc.eq lbl
+// CHECK: [[@LINE-1]]:1: error: instruction requires: hbc
+// CHECK-NEXT: bc.eq lbl
+
+cpyfp [x0]!, [x1]!, x2!
+// CHECK-NOT: [[@LINE-1]]:1: error: instruction requires: mops
+.arch_extension nomops
+cpyfp [x0]!, [x1]!, x2!
+// CHECK: [[@LINE-1]]:1: error: instruction requires: mops
+// CHECK-NEXT: cpyfp [x0]!, [x1]!, x2!
diff --git a/llvm/test/MC/AArch64/directive-arch_extension.s b/llvm/test/MC/AArch64/directive-arch_extension.s
--- a/llvm/test/MC/AArch64/directive-arch_extension.s
+++ b/llvm/test/MC/AArch64/directive-arch_extension.s
@@ -83,3 +83,12 @@
 .arch_extension flagm
 cfinv
 // CHECK: cfinv
+
+.arch_extension hbc
+lbl:
+    bc.eq lbl
+// CHECK: bc.eq lbl
+
+.arch_extension mops
+cpyfp [x0]!, [x1]!, x2!
+// CHECK: cpyfp [x0]!, [x1]!, x2!