[AArch64] Add aarch64_neon_vcmla{_rot{90,180,270}} intrinsics.

[fhahn]

Summary

Add builtins required to implement vcmla and rotated variants from
the ACLE

[t.p.northover]

LGTM.

[fhahn]

Updated to use multiclass to make things a bit less verbose (mostly based on work Tim did initially).

llvm/include/llvm/IR/IntrinsicsAArch64.td

// v8.6-A Matrix Multiply Intrinsics
   def int_aarch64_neon_fmlal : AdvSIMD_FP16FML_Intrinsic;
   def int_aarch64_neon_fmlsl : AdvSIMD_FP16FML_Intrinsic;
   def int_aarch64_neon_fmlal2 : AdvSIMD_FP16FML_Intrinsic;
   def int_aarch64_neon_fmlsl2 : AdvSIMD_FP16FML_Intrinsic;
 
   // v8.3-A Floating-point complex add
   def int_aarch64_neon_vcadd_rot90  : AdvSIMD_2VectorArg_Intrinsic;
   def int_aarch64_neon_vcadd_rot270 : AdvSIMD_2VectorArg_Intrinsic;
+
+  def int_aarch64_neon_vcmla_rot0   : AdvSIMD_3VectorArg_Intrinsic;
+  def int_aarch64_neon_vcmla_rot90  : AdvSIMD_3VectorArg_Intrinsic;
+  def int_aarch64_neon_vcmla_rot180 : AdvSIMD_3VectorArg_Intrinsic;
+  def int_aarch64_neon_vcmla_rot270 : AdvSIMD_3VectorArg_Intrinsic;
 }
 
 let TargetPrefix = "aarch64" in {  // All intrinsics start with "llvm.aarch64.".
   class AdvSIMD_2Vector2Index_Intrinsic
     : Intrinsic<[llvm_anyvector_ty],
                 [llvm_anyvector_ty, llvm_i64_ty, LLVMMatchType<0>, llvm_i64_ty],
                 [IntrNoMem]>;
 }

llvm/lib/Target/AArch64/AArch64InstrInfo.td

let Predicates = [HasComplxNum, HasNEON] in {
   foreach Ty = [v4f32, v2f64] in {
     def : Pat<(Ty (int_aarch64_neon_vcadd_rot90 (Ty V128:$Rn), (Ty V128:$Rm))),
               (!cast<Instruction>("FCADD"#Ty) (Ty V128:$Rn), (Ty V128:$Rm), (i32 0))>;
     def : Pat<(Ty (int_aarch64_neon_vcadd_rot270 (Ty V128:$Rn), (Ty V128:$Rm))),
               (!cast<Instruction>("FCADD"#Ty) (Ty V128:$Rn), (Ty V128:$Rm), (i32 1))>;
   }
 }
 
+multiclass FCMLA_PATS<ValueType ty, RegisterClass Reg> {
+  def : Pat<(ty (int_aarch64_neon_vcmla_rot0 (ty Reg:$Rd), (ty Reg:$Rn), (ty Reg:$Rm))),
+            (!cast<Instruction>("FCMLA" # ty) $Rd, $Rn, $Rm, 0)>;
+  def : Pat<(ty (int_aarch64_neon_vcmla_rot90 (ty Reg:$Rd), (ty Reg:$Rn), (ty Reg:$Rm))),
+            (!cast<Instruction>("FCMLA" # ty) $Rd, $Rn, $Rm, 1)>;
+  def : Pat<(ty (int_aarch64_neon_vcmla_rot180 (ty Reg:$Rd), (ty Reg:$Rn), (ty Reg:$Rm))),
+            (!cast<Instruction>("FCMLA" # ty) $Rd, $Rn, $Rm, 2)>;
+  def : Pat<(ty (int_aarch64_neon_vcmla_rot270 (ty Reg:$Rd), (ty Reg:$Rn), (ty Reg:$Rm))),
+            (!cast<Instruction>("FCMLA" # ty) $Rd, $Rn, $Rm, 3)>;
+}
+
+let Predicates = [HasComplxNum, HasNEON, HasFullFP16] in {
+  defm : FCMLA_PATS<v4f16, V64>;
+  defm : FCMLA_PATS<v8f16, V128>;
+}
+let Predicates = [HasComplxNum, HasNEON] in {
+  defm : FCMLA_PATS<v2f32, V64>;
+  defm : FCMLA_PATS<v4f32, V128>;
+  defm : FCMLA_PATS<v2f64, V128>;
+}
+
 // v8.3a Pointer Authentication
 // These instructions inhabit part of the hint space and so can be used for
 // armv8 targets. Keeping the old HINT mnemonic when compiling without PA is
 // important for compatibility with other assemblers (e.g. GAS) when building
 // software compatible with both CPUs that do or don't implement PA.
 let Uses = [LR], Defs = [LR] in {
   def PACIAZ   : SystemNoOperands<0b000, "hint\t#24">;
   def PACIBZ   : SystemNoOperands<0b010, "hint\t#26">;

llvm/test/CodeGen/AArch64/neon-vcmla.ll

+; RUN: llc %s -mtriple=aarch64 -mattr=+v8.3a,+fullfp16 -o - | FileCheck %s
+
+define <4 x half> @test_16x4(<4 x half> %a, <4 x half> %b, <4 x half> %c) {
+entry:
+; CHECK-LABEL: test_16x4
+; CHECK: fcmla v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, #0
+;
+  %res = tail call <4 x half> @llvm.aarch64.neon.vcmla.rot0.v4f16(<4 x half> %a, <4 x half> %b, <4 x half> %c)
+  ret <4 x half> %res
+}
+
+
+define <4 x half> @test_rot90_16x4(<4 x half> %a, <4 x half> %b, <4 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot90_16x4
+; CHECK: fcmla v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, #90
+;
+  %res = tail call <4 x half> @llvm.aarch64.neon.vcmla.rot90.v4f16(<4 x half> %a, <4 x half> %b, <4 x half> %c)
+  ret <4 x half> %res
+}
+
+define <4 x half> @test_rot180_16x4(<4 x half> %a, <4 x half> %b, <4 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot180_16x4
+; CHECK: fcmla v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, #180
+;
+  %res = tail call <4 x half> @llvm.aarch64.neon.vcmla.rot180.v4f16(<4 x half> %a, <4 x half> %b, <4 x half> %c)
+  ret <4 x half> %res
+}
+
+define <4 x half> @test_rot270_16x4(<4 x half> %a, <4 x half> %b, <4 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot270_16x4
+; CHECK: fcmla v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, v{{[0-9]+}}.4h, #270
+;
+  %res = tail call <4 x half> @llvm.aarch64.neon.vcmla.rot270.v4f16(<4 x half> %a, <4 x half> %b, <4 x half> %c)
+  ret <4 x half> %res
+}
+
+define <2 x float> @test_32x2(<2 x float> %a, <2 x float> %b, <2 x float> %c) {
+entry:
+; CHECK-LABEL: test_32x2
+; CHECK: fcmla v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, #0
+;
+  %res = tail call <2 x float> @llvm.aarch64.neon.vcmla.rot0.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c)
+  ret <2 x float> %res
+}
+
+define <2 x float> @test_rot90_32x2(<2 x float> %a, <2 x float> %b, <2 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot90_32x2
+; CHECK: fcmla v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, #90
+;
+  %res = tail call <2 x float> @llvm.aarch64.neon.vcmla.rot90.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c)
+  ret <2 x float> %res
+}
+
+define <2 x float> @test_rot180_32x2(<2 x float> %a, <2 x float> %b, <2 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot180_32x2
+; CHECK: fcmla v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, #180
+;
+  %res = tail call <2 x float> @llvm.aarch64.neon.vcmla.rot180.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c)
+  ret <2 x float> %res
+}
+
+define <2 x float> @test_rot270_32x2(<2 x float> %a, <2 x float> %b, <2 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot270_32x2
+; CHECK: fcmla v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, v{{[0-9]+}}.2s, #270
+;
+  %res = tail call <2 x float> @llvm.aarch64.neon.vcmla.rot270.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c)
+  ret <2 x float> %res
+}
+
+define <8 x half> @test_16x8(<8 x half> %a, <8 x half> %b, <8 x half> %c) {
+entry:
+; CHECK-LABEL: test_16x8
+; CHECK: fcmla v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, #0
+;
+  %res = tail call <8 x half> @llvm.aarch64.neon.vcmla.rot0.v8f16(<8 x half> %a, <8 x half> %b, <8 x half> %c)
+  ret <8 x half> %res
+}
+
+define <8 x half> @test_rot90_16x8(<8 x half> %a, <8 x half> %b, <8 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot90_16x8
+; CHECK: fcmla v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, #90
+;
+  %res = tail call <8 x half> @llvm.aarch64.neon.vcmla.rot90.v8f16(<8 x half> %a, <8 x half> %b, <8 x half> %c)
+  ret <8 x half> %res
+}
+
+define <8 x half> @test_rot180_16x8(<8 x half> %a, <8 x half> %b, <8 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot180_16x8
+; CHECK: fcmla v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, #180
+;
+  %res = tail call <8 x half> @llvm.aarch64.neon.vcmla.rot180.v8f16(<8 x half> %a, <8 x half> %b, <8 x half> %c)
+  ret <8 x half> %res
+}
+
+define <8 x half> @test_rot270_16x8(<8 x half> %a, <8 x half> %b, <8 x half> %c) {
+entry:
+; CHECK-LABEL: test_rot270_16x8
+; CHECK: fcmla v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, v{{[0-9]+}}.8h, #270
+;
+  %res = tail call <8 x half> @llvm.aarch64.neon.vcmla.rot270.v8f16(<8 x half> %a, <8 x half> %b, <8 x half> %c)
+  ret <8 x half> %res
+}
+
+define <4 x float> @test_32x4(<4 x float> %a, <4 x float> %b, <4 x float> %c) {
+entry:
+; CHECK-LABEL: test_32x4
+; CHECK: fcmla v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, #0
+;
+  %res = tail call <4 x float> @llvm.aarch64.neon.vcmla.rot0.v4f32(<4 x float> %a, <4 x float> %b, <4 x float> %c)
+  ret <4 x float> %res
+}
+
+define <4 x float> @test_rot90_32x4(<4 x float> %a, <4 x float> %b, <4 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot90_32x4
+; CHECK: fcmla v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, #90
+;
+  %res = tail call <4 x float> @llvm.aarch64.neon.vcmla.rot90.v4f32(<4 x float> %a, <4 x float> %b, <4 x float> %c)
+  ret <4 x float> %res
+}
+
+define <4 x float> @test_rot180_32x4(<4 x float> %a, <4 x float> %b, <4 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot180_32x4
+; CHECK: fcmla v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, #180
+;
+  %res = tail call <4 x float> @llvm.aarch64.neon.vcmla.rot180.v4f32(<4 x float> %a, <4 x float> %b, <4 x float> %c)
+  ret <4 x float> %res
+}
+
+define <4 x float> @test_rot270_32x4(<4 x float> %a, <4 x float> %b, <4 x float> %c) {
+entry:
+; CHECK-LABEL: test_rot270_32x4
+; CHECK: fcmla v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, v{{[0-9]+}}.4s, #270
+;
+  %res = tail call <4 x float> @llvm.aarch64.neon.vcmla.rot270.v4f32(<4 x float> %a, <4 x float> %b, <4 x float> %c)
+  ret <4 x float> %res
+}
+
+define <2 x double> @test_64x2(<2 x double> %a, <2 x double> %b, <2 x double> %c) {
+entry:
+; CHECK-LABEL: test_64x2
+; CHECK: fcmla v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, #0
+;
+  %res = tail call <2 x double> @llvm.aarch64.neon.vcmla.rot0.v2f64(<2 x double> %a, <2 x double> %b, <2 x double> %c)
+  ret <2 x double> %res
+}
+
+define <2 x double> @test_rot90_64x2(<2 x double> %a, <2 x double> %b, <2 x double> %c) {
+entry:
+; CHECK-LABEL: test_rot90_64x2
+; CHECK: fcmla v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, #90
+;
+  %res = tail call <2 x double> @llvm.aarch64.neon.vcmla.rot90.v2f64(<2 x double> %a, <2 x double> %b, <2 x double> %c)
+  ret <2 x double> %res
+}
+
+define <2 x double> @test_rot180_64x2(<2 x double> %a, <2 x double> %b, <2 x double> %c) {
+entry:
+; CHECK-LABEL: test_rot180_64x2
+; CHECK: fcmla v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, #180
+;
+  %res = tail call <2 x double> @llvm.aarch64.neon.vcmla.rot180.v2f64(<2 x double> %a, <2 x double> %b, <2 x double> %c)
+  ret <2 x double> %res
+}
+
+define <2 x double> @test_rot270_64x2(<2 x double> %a, <2 x double> %b, <2 x double> %c) {
+entry:
+; CHECK-LABEL: test_rot270_64x2
+; CHECK: fcmla v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, v{{[0-9]+}}.2d, #270
+;
+  %res = tail call <2 x double> @llvm.aarch64.neon.vcmla.rot270.v2f64(<2 x double> %a, <2 x double> %b, <2 x double> %c)
+  ret <2 x double> %res
+}
+
+declare <4 x half> @llvm.aarch64.neon.vcmla.rot0.v4f16(<4 x half>, <4 x half>, <4 x half>)
+declare <4 x half> @llvm.aarch64.neon.vcmla.rot90.v4f16(<4 x half>, <4 x half>, <4 x half>)
+declare <4 x half> @llvm.aarch64.neon.vcmla.rot180.v4f16(<4 x half>, <4 x half>, <4 x half>)
+declare <4 x half> @llvm.aarch64.neon.vcmla.rot270.v4f16(<4 x half>, <4 x half>, <4 x half>)
+declare <8 x half> @llvm.aarch64.neon.vcmla.rot0.v8f16(<8 x half>, <8 x half>, <8 x half>)
+declare <8 x half> @llvm.aarch64.neon.vcmla.rot90.v8f16(<8 x half>, <8 x half>, <8 x half>)
+declare <8 x half> @llvm.aarch64.neon.vcmla.rot180.v8f16(<8 x half>, <8 x half>, <8 x half>)
+declare <8 x half> @llvm.aarch64.neon.vcmla.rot270.v8f16(<8 x half>, <8 x half>, <8 x half>)
+declare <2 x float> @llvm.aarch64.neon.vcmla.rot0.v2f32(<2 x float>, <2 x float>, <2 x float>)
+declare <2 x float> @llvm.aarch64.neon.vcmla.rot90.v2f32(<2 x float>, <2 x float>, <2 x float>)
+declare <2 x float> @llvm.aarch64.neon.vcmla.rot180.v2f32(<2 x float>, <2 x float>, <2 x float>)
+declare <2 x float> @llvm.aarch64.neon.vcmla.rot270.v2f32(<2 x float>, <2 x float>, <2 x float>)
+declare <4 x float> @llvm.aarch64.neon.vcmla.rot0.v4f32(<4 x float>, <4 x float>, <4 x float>)
+declare <4 x float> @llvm.aarch64.neon.vcmla.rot90.v4f32(<4 x float>, <4 x float>, <4 x float>)
+declare <4 x float> @llvm.aarch64.neon.vcmla.rot180.v4f32(<4 x float>, <4 x float>, <4 x float>)
+declare <4 x float> @llvm.aarch64.neon.vcmla.rot270.v4f32(<4 x float>, <4 x float>, <4 x float>)
+declare <2 x double> @llvm.aarch64.neon.vcmla.rot0.v2f64(<2 x double>, <2 x double>, <2 x double>)
+declare <2 x double> @llvm.aarch64.neon.vcmla.rot90.v2f64(<2 x double>, <2 x double>, <2 x double>)
+declare <2 x double> @llvm.aarch64.neon.vcmla.rot180.v2f64(<2 x double>, <2 x double>, <2 x double>)
+declare <2 x double> @llvm.aarch64.neon.vcmla.rot270.v2f64(<2 x double>, <2 x double>, <2 x double>)