Index: llvm/trunk/lib/Target/AArch64/AArch64SVEInstrInfo.td
===================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ llvm/trunk/lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -1109,6 +1109,10 @@
   defm SQDMLSLB_ZZZ : sve2_int_mla_long<0b11010, "sqdmlslb">;
   defm SQDMLSLT_ZZZ : sve2_int_mla_long<0b11011, "sqdmlslt">;
 
+  // SVE2 saturating multiply-add interleaved long
+  defm SQDMLALBT_ZZZ : sve2_int_mla_long<0b00010, "sqdmlalbt">;
+  defm SQDMLSLBT_ZZZ : sve2_int_mla_long<0b00011, "sqdmlslbt">;
+
   // SVE2 integer multiply long
   defm SQDMULLB_ZZZ : sve2_wide_int_arith_long<0b11000, "sqdmullb">;
   defm SQDMULLT_ZZZ : sve2_wide_int_arith_long<0b11001, "sqdmullt">;
Index: llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt-diagnostics.s
===================================================================
--- llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt-diagnostics.s
+++ llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt-diagnostics.s
@@ -0,0 +1,34 @@
+// RUN: not llvm-mc -triple=aarch64 -show-encoding -mattr=+sve2  2>&1 < %s| FileCheck %s
+
+
+// ------------------------------------------------------------------------- //
+// Invalid element width
+
+sqdmlalbt z0.b, z1.b, z2.b
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlalbt z0.b, z1.b, z2.b
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlalbt z0.h, z1.h, z2.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlalbt z0.h, z1.h, z2.h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlalbt z0.s, z1.s, z2.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlalbt z0.s, z1.s, z2.s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlalbt z0.d, z1.d, z2.d
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlalbt z0.d, z1.d, z2.d
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+// --------------------------------------------------------------------------//
+// Negative tests for instructions that are incompatible with movprfx
+
+movprfx z0.d, p0/z, z7.d
+sqdmlalbt  z0.d, z1.s, z15.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: instruction is unpredictable when following a predicated movprfx, suggest using unpredicated movprfx
+// CHECK-NEXT: sqdmlalbt  z0.d, z1.s, z15.s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
Index: llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt.s
===================================================================
--- llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt.s
+++ llvm/trunk/test/MC/AArch64/SVE2/sqdmlalbt.s
@@ -0,0 +1,42 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sve2 < %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=+sve2 < %s \
+// RUN:        | llvm-objdump -d -mattr=+sve2 - | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sve2 < %s \
+// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+
+
+sqdmlalbt z0.h, z1.b, z31.b
+// CHECK-INST: sqdmlalbt	z0.h, z1.b, z31.b
+// CHECK-ENCODING: [0x20,0x08,0x5f,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 08 5f 44 <unknown>
+
+sqdmlalbt z0.s, z1.h, z31.h
+// CHECK-INST: sqdmlalbt	z0.s, z1.h, z31.h
+// CHECK-ENCODING: [0x20,0x08,0x9f,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 08 9f 44 <unknown>
+
+sqdmlalbt z0.d, z1.s, z31.s
+// CHECK-INST: sqdmlalbt	z0.d, z1.s, z31.s
+// CHECK-ENCODING: [0x20,0x08,0xdf,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 08 df 44 <unknown>
+
+// --------------------------------------------------------------------------//
+// Test compatibility with MOVPRFX instruction.
+
+movprfx z21, z28
+// CHECK-INST: movprfx	z21, z28
+// CHECK-ENCODING: [0x95,0xbf,0x20,0x04]
+// CHECK-ERROR: instruction requires: sve
+// CHECK-UNKNOWN: 95 bf 20 04 <unknown>
+
+sqdmlalbt z21.d, z1.s, z31.s
+// CHECK-INST: sqdmlalbt	z21.d, z1.s, z31.s
+// CHECK-ENCODING: [0x35,0x08,0xdf,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 35 08 df 44 <unknown>
Index: llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt-diagnostics.s
===================================================================
--- llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt-diagnostics.s
+++ llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt-diagnostics.s
@@ -0,0 +1,34 @@
+// RUN: not llvm-mc -triple=aarch64 -show-encoding -mattr=+sve2  2>&1 < %s| FileCheck %s
+
+
+// ------------------------------------------------------------------------- //
+// Invalid element width
+
+sqdmlslbt z0.b, z1.b, z2.b
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlslbt z0.b, z1.b, z2.b
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlslbt z0.h, z1.h, z2.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlslbt z0.h, z1.h, z2.h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlslbt z0.s, z1.s, z2.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlslbt z0.s, z1.s, z2.s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+sqdmlslbt z0.d, z1.d, z2.d
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid element width
+// CHECK-NEXT: sqdmlslbt z0.d, z1.d, z2.d
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+// --------------------------------------------------------------------------//
+// Negative tests for instructions that are incompatible with movprfx
+
+movprfx z0.d, p0/z, z7.d
+sqdmlslbt  z0.d, z1.s, z15.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: instruction is unpredictable when following a predicated movprfx, suggest using unpredicated movprfx
+// CHECK-NEXT: sqdmlslbt  z0.d, z1.s, z15.s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
Index: llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt.s
===================================================================
--- llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt.s
+++ llvm/trunk/test/MC/AArch64/SVE2/sqdmlslbt.s
@@ -0,0 +1,42 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sve2 < %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=+sve2 < %s \
+// RUN:        | llvm-objdump -d -mattr=+sve2 - | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sve2 < %s \
+// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+
+
+sqdmlslbt z0.h, z1.b, z31.b
+// CHECK-INST: sqdmlslbt	z0.h, z1.b, z31.b
+// CHECK-ENCODING: [0x20,0x0c,0x5f,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 0c 5f 44 <unknown>
+
+sqdmlslbt z0.s, z1.h, z31.h
+// CHECK-INST: sqdmlslbt	z0.s, z1.h, z31.h
+// CHECK-ENCODING: [0x20,0x0c,0x9f,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 0c 9f 44 <unknown>
+
+sqdmlslbt z0.d, z1.s, z31.s
+// CHECK-INST: sqdmlslbt	z0.d, z1.s, z31.s
+// CHECK-ENCODING: [0x20,0x0c,0xdf,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 20 0c df 44 <unknown>
+
+// --------------------------------------------------------------------------//
+// Test compatibility with MOVPRFX instruction.
+
+movprfx z21, z28
+// CHECK-INST: movprfx	z21, z28
+// CHECK-ENCODING: [0x95,0xbf,0x20,0x04]
+// CHECK-ERROR: instruction requires: sve
+// CHECK-UNKNOWN: 95 bf 20 04 <unknown>
+
+sqdmlslbt z21.d, z1.s, z31.s
+// CHECK-INST: sqdmlslbt	z21.d, z1.s, z31.s
+// CHECK-ENCODING: [0x35,0x0c,0xdf,0x44]
+// CHECK-ERROR: instruction requires: sve2
+// CHECK-UNKNOWN: 35 0c df 44 <unknown>