[AArch64] Add assembly/dissasembly for BFSCALE instructions

llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td

@@ -1000,6 +1000,11 @@ defm FMOPA_MPPZZ_BtoS : sme_outer_product_fp32<0b0, 0b01, ZPR8, "fmopa", null_fr
 
 } //[HasSMEF8F32]
 
+let Predicates = [HasSME2, HasSVEBFSCALE] in {
+  defm BFSCALE : sme2_bfscale_single<"bfscale">;
+  defm BFSCALE : sme2_bfscale_multi<"bfscale">;
+}
+
 let Predicates = [HasSME2p2] in {
   def FTMOPA_M2ZZZI_HtoS  : sme_tmopa_32b<0b11000, ZZ_h_mul_r, ZPR16, "ftmopa">;
   def FTMOPA_M2ZZZI_StoS  : sme_tmopa_32b<0b00000, ZZ_s_mul_r, ZPR32, "ftmopa">;

llvm/lib/Target/AArch64/SMEInstrFormats.td

@@ -5188,3 +5188,13 @@ class sme2_luti4_vector_vg4_strided<bits<2> sz, bits<2> op, string mnemonic>
   let Inst{3-2}   = 0b00;
   let Inst{1-0}   = Zd{1-0};
 }
+
+multiclass sme2_bfscale_single<string mnemonic> {
+  def _2ZZ : sme2_sve_destructive_vector_vg2_single<0b00, 0b0011000, ZZ_h_mul_r, ZPR4b16, mnemonic>;
+  def _4ZZ : sme2_sve_destructive_vector_vg4_single<0b00, 0b0011000, ZZZZ_h_mul_r, ZPR4b16, mnemonic>;
+}
+
+multiclass sme2_bfscale_multi<string mnemonic> {
+  def _2Z2Z : sme2_sve_destructive_vector_vg2_multi<0b00, 0b0011000, ZZ_h_mul_r, mnemonic>;
+  def _4Z4Z : sme2_sve_destructive_vector_vg4_multi<0b00, 0b0011000, ZZZZ_h_mul_r, mnemonic>;
+}

llvm/test/MC/AArch64/SME2/bfscale-diagnostics.s

@@ -0,0 +1,87 @@
+// RUN: not llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sve-bfscale 2>&1 < %s| FileCheck %s
+
+// Multiple and single vector, 2 regs
+
+bfscale  {z0.s-z1.s}, {z0.s-z1.s}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z1.h-z2.h}, {z1.h-z2.h}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors, where the first vector is a multiple of 2 and with matching element types
+
+bfscale  {z0.h-z2.h}, {z0.h-z2.h}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z0.h-z1.h}, {z0.h-z1.h}, z0.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected z0.h..z15.h
+
+bfscale  {z0.h-z1.h}, {z0.h-z1.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected z0.h..z15.h
+
+bfscale  {z0.h-z1.h}, {z2.h-z3.h}, z8.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: operand must match destination register list
+
+// Multiple and single vector, 4 regs
+
+bfscale  {z0.s-z3.s}, {z0.s-z3.s}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z1.h-z4.h}, {z1.h-z4.h}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+
+bfscale  {z0.h-z4.h}, {z0.h-z4.h}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid number of vectors
+
+bfscale  {z0.h-z3.h}, {z0.h-z3.h}, z0.s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected z0.h..z15.h
+
+bfscale  {z0.h-z3.h}, {z0.h-z3.h}, z16.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid restricted vector register, expected z0.h..z15.h
+
+bfscale  {z0.h-z3.h}, {z4.h-z7.h}, z8.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: operand must match destination register list
+
+// Multiple vectors, 2 regs
+
+bfscale  {z0.s-z1.s}, {z0.s-z1.s}, {z2.h-z3.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z1.h-z2.h}, {z1.h-z2.h}, {z2.h-z3.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors, where the first vector is a multiple of 2 and with matching element types
+
+bfscale  {z0.h-z2.h}, {z0.h-z4.h}, {z2.h-z3.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid number of vectors
+
+bfscale  {z0.h-z1.h}, {z0.h-z1.h}, {z2.s-z3.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z0.h-z1.h}, {z0.h-z1.h}, {z28.h-z30.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z0.h-z1.h}, {z0.h-z1.h}, {z29.h-z30.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors, where the first vector is a multiple of 2 and with matching element types
+
+bfscale  {z0.h-z1.h}, {z2.h-z3.h}, {z28.h-z29.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: operand must match destination register list
+
+// Multiple vectors, 4 regs
+
+bfscale  {z0.s-z3.s}, {z0.s-z3.s}, {z4.h-z7.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z1.h-z4.h}, {z1.h-z4.h}, z0.h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+
+bfscale  {z0.h-z4.h}, {z0.h-z4.h}, {z4.h-z7.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error:  invalid number of vectors
+
+bfscale  {z0.h-z3.h}, {z0.h-z3.h}, {z4.s-z7.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+
+bfscale  {z0.h-z3.h}, {z0.h-z3.h}, {z4.h-z8.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid number of vectors
+
+bfscale  {z0.h-z3.h}, {z0.h-z3.h}, {z5.h-z8.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+
+bfscale  {z0.h-z3.h}, {z4.h-z7.h}, {z8.h-z11.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: operand must match destination register list

llvm/test/MC/AArch64/SME2/bfscale.s

@@ -0,0 +1,93 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sve-bfscale < %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=+sme2,+sve-bfscale < %s \
+// RUN:        | llvm-objdump -d --mattr=+sme2,+sve-bfscale - | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sve-bfscale < %s \
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// Disassemble encoding and check the re-encoding (-show-encoding) matches.
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sve-bfscale < %s \
+// RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
+// RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sve-bfscale -disassemble -show-encoding \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+
+// Multiple and single vector, 2 regs
+
+bfscale {z0.h-z1.h}, {z0.h-z1.h}, z0.h  // 11000001-00100000-10100001-10000000
+// CHECK-INST: bfscale { z0.h, z1.h }, { z0.h, z1.h }, z0.h
+// CHECK-ENCODING: [0x80,0xa1,0x20,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c120a180 <unknown>
+
+bfscale {z20.h-z21.h}, {z20.h-z21.h}, z5.h  // 11000001-00100101-10100001-10010100
+// CHECK-INST: bfscale { z20.h, z21.h }, { z20.h, z21.h }, z5.h
+// CHECK-ENCODING: [0x94,0xa1,0x25,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c125a194 <unknown>
+
+bfscale {z30.h-z31.h}, {z30.h-z31.h}, z15.h  // 11000001-00101111-10100001-10011110
+// CHECK-INST: bfscale { z30.h, z31.h }, { z30.h, z31.h }, z15.h
+// CHECK-ENCODING: [0x9e,0xa1,0x2f,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c12fa19e <unknown>
+
+// Multiple and single vector, 4 regs
+
+bfscale {z0.h-z3.h}, {z0.h-z3.h}, z0.h  // 11000001-00100000-10101001-10000000
+// CHECK-INST: bfscale { z0.h - z3.h }, { z0.h - z3.h }, z0.h
+// CHECK-ENCODING: [0x80,0xa9,0x20,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c120a980 <unknown>
+
+bfscale {z20.h-z23.h}, {z20.h-z23.h}, z5.h  // 11000001-00100101-10101001-10010100
+// CHECK-INST: bfscale { z20.h - z23.h }, { z20.h - z23.h }, z5.h
+// CHECK-ENCODING: [0x94,0xa9,0x25,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c125a994 <unknown>
+
+bfscale {z28.h-z31.h}, {z28.h-z31.h}, z15.h  // 11000001-00101111-10101001-10011100
+// CHECK-INST: bfscale { z28.h - z31.h }, { z28.h - z31.h }, z15.h
+// CHECK-ENCODING: [0x9c,0xa9,0x2f,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c12fa99c <unknown>
+
+// Multiple vectors, 2 regs
+
+bfscale {z0.h-z1.h}, {z0.h-z1.h}, {z0.h-z1.h}  // 11000001-00100000-10110001-10000000
+// CHECK-INST: bfscale { z0.h, z1.h }, { z0.h, z1.h }, { z0.h, z1.h }
+// CHECK-ENCODING: [0x80,0xb1,0x20,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c120b180 <unknown>
+
+bfscale {z20.h-z21.h}, {z20.h-z21.h}, {z20.h-z21.h}  // 11000001-00110100-10110001-10010100
+// CHECK-INST: bfscale { z20.h, z21.h }, { z20.h, z21.h }, { z20.h, z21.h }
+// CHECK-ENCODING: [0x94,0xb1,0x34,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c134b194 <unknown>
+
+bfscale {z30.h-z31.h}, {z30.h-z31.h}, {z30.h-z31.h}  // 11000001-00111110-10110001-10011110
+// CHECK-INST: bfscale { z30.h, z31.h }, { z30.h, z31.h }, { z30.h, z31.h }
+// CHECK-ENCODING: [0x9e,0xb1,0x3e,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c13eb19e <unknown>
+
+// Multiple vectors, 4 regs
+
+bfscale {z0.h-z3.h}, {z0.h-z3.h}, {z0.h-z3.h}  // 11000001-00100000-10111001-10000000
+// CHECK-INST: bfscale { z0.h - z3.h }, { z0.h - z3.h }, { z0.h - z3.h }
+// CHECK-ENCODING: [0x80,0xb9,0x20,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c120b980 <unknown>
+
+bfscale {z20.h-z23.h}, {z20.h-z23.h}, {z20.h-z23.h}  // 11000001-00110100-10111001-10010100
+// CHECK-INST: bfscale { z20.h - z23.h }, { z20.h - z23.h }, { z20.h - z23.h }
+// CHECK-ENCODING: [0x94,0xb9,0x34,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c134b994 <unknown>
+
+bfscale {z28.h-z31.h}, {z28.h-z31.h}, {z28.h-z31.h}  // 11000001-00111100-10111001-10011100
+// CHECK-INST: bfscale { z28.h - z31.h }, { z28.h - z31.h }, { z28.h - z31.h }
+// CHECK-ENCODING: [0x9c,0xb9,0x3c,0xc1]
+// CHECK-ERROR: instruction requires: sme2 sve-bfscale
+// CHECK-UNKNOWN: c13cb99c <unknown>