diff --git a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
index b716529428894..e78cd7146df2a 100644
--- a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
@@ -1047,3 +1047,8 @@ let Predicates = [HasSME2p2, HasSMEF8F32] in {
   defm FMOP4A : sme2_fmop4a_fp8_fp32_4way<"fmop4a">;
 }
 }
+
+let Predicates = [HasSME2p2, HasSMEB16B16] in {
+  defm BFMOP4A : sme2_bfmop4as_non_widening<0, "bfmop4a">;
+  defm BFMOP4S : sme2_bfmop4as_non_widening<1, "bfmop4s">;
+}
diff --git a/llvm/lib/Target/AArch64/SMEInstrFormats.td b/llvm/lib/Target/AArch64/SMEInstrFormats.td
index e7c90b0ed14e0..b31bea712a76d 100644
--- a/llvm/lib/Target/AArch64/SMEInstrFormats.td
+++ b/llvm/lib/Target/AArch64/SMEInstrFormats.td
@@ -5417,3 +5417,40 @@ multiclass sme2_fmop4a_fp8_fp32_4way<string mnemonic> {
   // Multiple vectors
   def _M2Z2Z_BtoS : sme2_fp8_fp32_quarter_tile_outer_product<1, 1, mnemonic, ZZ_b_mul_r_Lo, ZZ_b_mul_r_Hi>;
 }
+
+class sme2_bf16_fp16_quarter_tile_outer_product<bit M, bit N, bit S, string mnemonic, RegisterOperand zn_ty, RegisterOperand zm_ty>
+    : I<(outs TileOp16:$ZAda),
+        (ins TileOp16:$_ZAda, zn_ty:$Zn, zm_ty:$Zm),
+        mnemonic, "\t$ZAda, $Zn, $Zm",
+        "", []>, Sched<[]> {
+  bit ZAda;
+  bits<3> Zn;
+  bits<3> Zm;
+
+  let Inst{31-21} = 0b10000001001;
+  let Inst{20} = M;
+  let Inst{19-17} = Zm;
+  let Inst{16-10} = 0b0000000;
+  let Inst{9} = N;
+  let Inst{8-6} = Zn;
+  let Inst{5} = 0;
+  let Inst{4} = S;
+  let Inst{3-1} = 0b100;
+  let Inst{0} = ZAda;
+
+  let Constraints = "$ZAda = $_ZAda";
+}
+
+multiclass sme2_bfmop4as_non_widening<bit S, string mnemonic> {
+  // Single vectors
+  def _MZZ_H : sme2_bf16_fp16_quarter_tile_outer_product<0, 0, S, mnemonic, ZPR16Mul2_Lo, ZPR16Mul2_Hi>;
+
+  // Multiple and single vectors
+  def _M2ZZ_H : sme2_bf16_fp16_quarter_tile_outer_product<0, 1, S, mnemonic, ZZ_h_mul_r_Lo, ZPR16Mul2_Hi>;
+
+  // Single and multiple vectors
+  def _MZ2Z_H : sme2_bf16_fp16_quarter_tile_outer_product<1, 0, S, mnemonic, ZPR16Mul2_Lo, ZZ_h_mul_r_Hi>;
+
+  // Multiple vectors
+  def _M2Z2Z_H : sme2_bf16_fp16_quarter_tile_outer_product<1, 1, S, mnemonic, ZZ_h_mul_r_Lo, ZZ_h_mul_r_Hi>;
+}
diff --git a/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening-diagnostics.s b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening-diagnostics.s
new file mode 100644
index 0000000000000..231d4cd9967a4
--- /dev/null
+++ b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening-diagnostics.s
@@ -0,0 +1,220 @@
+// RUN: not llvm-mc -triple=aarch64 -mattr=+sme2p2,+sme-b16b16 < %s 2>&1 | FileCheck %s
+
+// BFMOP4A
+
+// Single vectors
+
+bfmop4a za0.d, z0.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4a za4.h, z0.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, z0.s, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z15.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z16.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z0.h, z16.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4a za0.h, z12.h, z17.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4a za0.h, z12.h, z14.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4a za0.h, z12.h, z31.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+// Single and multiple vectors
+
+bfmop4a za0.d, z0.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4a za4.h, z0.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, z0.s, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z1.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z16.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4a za0.h, z0.h, {z16.s-z17.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, z0.h, {z17.h-z18.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, z0.h, {z12.h-z13.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+// Multiple and single vectors
+
+bfmop4a za0.d, {z0.h-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4a za4.h, {z0.h-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, {z0.s-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: mismatched register size suffix
+
+bfmop4a za0.h, {z1.h-z2.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, {z16.h-z17.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, {z0.h-z1.h}, z16.d
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4a za0.h, {z0.h-z1.h}, z17.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4a za0.h, {z0.h-z1.h}, z12.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+// Multiple vectors
+
+bfmop4a za0.d, {z0.h-z1.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4a za4.h, {z0.h-z1.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, {z0.s-z1.s}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, {z1.h-z2.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, {z18.h-z19.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, {z0.h-z1.h}, {z16.s-z17.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4a za0.h, {z0.h-z1.h}, {z19.h-z20.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4a za0.h, {z0.h-z1.h}, {z10.h-z11.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+
+// BFMOP4S
+
+// Single vectors
+
+bfmop4s za0.d, z0.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4s za4.h, z0.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, z0.s, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z15.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z16.h, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z0.h, z16.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4s za0.h, z12.h, z17.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4s za0.h, z12.h, z14.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4s za0.h, z12.h, z31.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+// Single and multiple vectors
+
+bfmop4s za0.d, z0.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4s za4.h, z0.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, z0.s, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z1.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z16.h, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z0.h..z14.h
+
+bfmop4s za0.h, z0.h, {z16.s-z17.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, z0.h, {z17.h-z18.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, z0.h, {z12.h-z13.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+// Multiple and single vectors
+
+bfmop4s za0.d, {z0.h-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4s za4.h, {z0.h-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, {z0.s-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: mismatched register size suffix
+
+bfmop4s za0.h, {z1.h-z2.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, {z16.h-z17.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, {z0.h-z1.h}, z16.d
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4s za0.h, {z0.h-z1.h}, z17.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+bfmop4s za0.h, {z0.h-z1.h}, z12.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected even register in z16.h..z30.h
+
+// Multiple vectors
+
+bfmop4s za0.d, {z0.h-z1.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid matrix operand, expected za[0-3].s
+
+bfmop4s za4.h, {z0.h-z1.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, {z0.s-z1.s}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, {z1.h-z2.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, {z18.h-z19.h}, {z16.h-z17.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z0-z14, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, {z0.h-z1.h}, {z16.s-z17.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfmop4s za0.h, {z0.h-z1.h}, {z19.h-z20.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
+
+bfmop4s za0.h, {z0.h-z1.h}, {z10.h-z11.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors in the range z16-z30, where the first vector is a multiple of 2 and with matching element types
diff --git a/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s
new file mode 100644
index 0000000000000..b98bb99def056
--- /dev/null
+++ b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s
@@ -0,0 +1,178 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-b16b16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
+// RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-b16b16 < %s \
+// RUN:        | llvm-objdump -d --mattr=+sme2p2,+sme-b16b16 - | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-b16b16 < %s \
+// RUN:        | llvm-objdump -d --mattr=-sme2p2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// Disassemble encoding and check the re-encoding (-show-encoding) matches.
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-b16b16 < %s \
+// RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
+// RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2p2,+sme-b16b16 -disassemble -show-encoding \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+
+// BFMOP4A
+
+// Single vectors
+
+bfmop4a za0.h, z0.h, z16.h  // 10000001-00100000-00000000-00001000
+// CHECK-INST: bfmop4a za0.h, z0.h, z16.h
+// CHECK-ENCODING: [0x08,0x00,0x20,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81200008 <unknown>
+
+bfmop4a za1.h, z12.h, z24.h  // 10000001-00101000-00000001-10001001
+// CHECK-INST: bfmop4a za1.h, z12.h, z24.h
+// CHECK-ENCODING: [0x89,0x01,0x28,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81280189 <unknown>
+
+bfmop4a za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11001001
+// CHECK-INST: bfmop4a za1.h, z14.h, z30.h
+// CHECK-ENCODING: [0xc9,0x01,0x2e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 812e01c9 <unknown>
+
+// Single and multiple vectors
+
+bfmop4a za0.h, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00001000
+// CHECK-INST: bfmop4a za0.h, z0.h, { z16.h, z17.h }
+// CHECK-ENCODING: [0x08,0x00,0x30,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81300008 <unknown>
+
+bfmop4a za1.h, z12.h, {z24.h-z25.h}  // 10000001-00111000-00000001-10001001
+// CHECK-INST: bfmop4a za1.h, z12.h, { z24.h, z25.h }
+// CHECK-ENCODING: [0x89,0x01,0x38,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81380189 <unknown>
+
+bfmop4a za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11001001
+// CHECK-INST: bfmop4a za1.h, z14.h, { z30.h, z31.h }
+// CHECK-ENCODING: [0xc9,0x01,0x3e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 813e01c9 <unknown>
+
+// Multiple and single vectors
+
+bfmop4a za0.h, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00001000
+// CHECK-INST: bfmop4a za0.h, { z0.h, z1.h }, z16.h
+// CHECK-ENCODING: [0x08,0x02,0x20,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81200208 <unknown>
+
+bfmop4a za1.h, {z12.h-z13.h}, z24.h  // 10000001-00101000-00000011-10001001
+// CHECK-INST: bfmop4a za1.h, { z12.h, z13.h }, z24.h
+// CHECK-ENCODING: [0x89,0x03,0x28,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81280389 <unknown>
+
+bfmop4a za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11001001
+// CHECK-INST: bfmop4a za1.h, { z14.h, z15.h }, z30.h
+// CHECK-ENCODING: [0xc9,0x03,0x2e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 812e03c9 <unknown>
+
+// Multiple vectors
+
+bfmop4a za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00001000
+// CHECK-INST: bfmop4a za0.h, { z0.h, z1.h }, { z16.h, z17.h }
+// CHECK-ENCODING: [0x08,0x02,0x30,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81300208 <unknown>
+
+bfmop4a za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00111000-00000011-10001001
+// CHECK-INST: bfmop4a za1.h, { z12.h, z13.h }, { z24.h, z25.h }
+// CHECK-ENCODING: [0x89,0x03,0x38,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81380389 <unknown>
+
+bfmop4a za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11001001
+// CHECK-INST: bfmop4a za1.h, { z14.h, z15.h }, { z30.h, z31.h }
+// CHECK-ENCODING: [0xc9,0x03,0x3e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 813e03c9 <unknown>
+
+
+// BFMOP4S
+
+// Single vectors
+
+bfmop4s za0.h, z0.h, z16.h  // 10000001-00100000-00000000-00011000
+// CHECK-INST: bfmop4s za0.h, z0.h, z16.h
+// CHECK-ENCODING: [0x18,0x00,0x20,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81200018 <unknown>
+
+bfmop4s za1.h, z12.h, z24.h  // 10000001-00101000-00000001-10011001
+// CHECK-INST: bfmop4s za1.h, z12.h, z24.h
+// CHECK-ENCODING: [0x99,0x01,0x28,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81280199 <unknown>
+
+bfmop4s za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11011001
+// CHECK-INST: bfmop4s za1.h, z14.h, z30.h
+// CHECK-ENCODING: [0xd9,0x01,0x2e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 812e01d9 <unknown>
+
+// Single and multiple vectors
+
+bfmop4s za0.h, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00011000
+// CHECK-INST: bfmop4s za0.h, z0.h, { z16.h, z17.h }
+// CHECK-ENCODING: [0x18,0x00,0x30,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81300018 <unknown>
+
+bfmop4s za1.h, z12.h, {z24.h-z25.h}  // 10000001-00111000-00000001-10011001
+// CHECK-INST: bfmop4s za1.h, z12.h, { z24.h, z25.h }
+// CHECK-ENCODING: [0x99,0x01,0x38,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81380199 <unknown>
+
+bfmop4s za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11011001
+// CHECK-INST: bfmop4s za1.h, z14.h, { z30.h, z31.h }
+// CHECK-ENCODING: [0xd9,0x01,0x3e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 813e01d9 <unknown>
+
+// Multiple and single vectors
+
+bfmop4s za0.h, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00011000
+// CHECK-INST: bfmop4s za0.h, { z0.h, z1.h }, z16.h
+// CHECK-ENCODING: [0x18,0x02,0x20,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81200218 <unknown>
+
+bfmop4s za1.h, {z12.h-z13.h}, z24.h  // 10000001-00101000-00000011-10011001
+// CHECK-INST: bfmop4s za1.h, { z12.h, z13.h }, z24.h
+// CHECK-ENCODING: [0x99,0x03,0x28,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81280399 <unknown>
+
+bfmop4s za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11011001
+// CHECK-INST: bfmop4s za1.h, { z14.h, z15.h }, z30.h
+// CHECK-ENCODING: [0xd9,0x03,0x2e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 812e03d9 <unknown>
+
+// Multiple vectors
+
+bfmop4s za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00011000
+// CHECK-INST: bfmop4s za0.h, { z0.h, z1.h }, { z16.h, z17.h }
+// CHECK-ENCODING: [0x18,0x02,0x30,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81300218 <unknown>
+
+bfmop4s za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00111000-00000011-10011001
+// CHECK-INST: bfmop4s za1.h, { z12.h, z13.h }, { z24.h, z25.h }
+// CHECK-ENCODING: [0x99,0x03,0x38,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 81380399 <unknown>
+
+bfmop4s za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11011001
+// CHECK-INST: bfmop4s za1.h, { z14.h, z15.h }, { z30.h, z31.h }
+// CHECK-ENCODING: [0xd9,0x03,0x3e,0x81]
+// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-UNKNOWN: 813e03d9 <unknown>