Add vp2intersect to AVX512 dialect.

Adds vp2intersect to the AVX512 dialect and defines a lowering to the
LLVM dialect.

Author: Matthias Springer <springerm@google.com>

Differential Revision: https://reviews.llvm.org/D95301

mlir/include/mlir/Dialect/AVX512/AVX512.td

@@ -96,4 +96,41 @@ def MaskScaleFOp : AVX512_Op<"mask.scalef", [NoSideEffect,
     "$src `,` $a `,` $b `,` $k `,` $rounding attr-dict `:` type($dst)";
 }
 
+def Vp2IntersectOp : AVX512_Op<"vp2intersect", [NoSideEffect,
+  AllTypesMatch<["a", "b"]>,
+  TypesMatchWith<"k1 has the same number of bits as elements in a",
+                 "a", "k1",
+                 "IntegerType::get($_self.getContext(), "
+                 "($_self.cast<VectorType>().getShape()[0]))">,
+  TypesMatchWith<"k2 has the same number of bits as elements in b",
+                 // Should use `b` instead of `a`, but that would require
+                 // adding `type($b)` to assemblyFormat.
+                 "a", "k2",
+                 "IntegerType::get($_self.getContext(), "
+                 "($_self.cast<VectorType>().getShape()[0]))">]> {
+  let summary = "Vp2Intersect op";
+  let description = [{
+    The `vp2intersect` op is an AVX512 specific op that can lower to the proper
+    LLVMAVX512 operation: `llvm.vp2intersect.d.512` or
+    `llvm.vp2intersect.q.512` depending on the type of MLIR vectors it is
+    applied to.
+
+    #### From the Intel Intrinsics Guide:
+
+    Compute intersection of packed integer vectors `a` and `b`, and store
+    indication of match in the corresponding bit of two mask registers
+    specified by `k1` and `k2`. A match in corresponding elements of `a` and
+    `b` is indicated by a set bit in the corresponding bit of the mask
+    registers.
+  }];
+  let arguments = (ins VectorOfLengthAndType<[16, 8], [I32, I64]>:$a,
+                   VectorOfLengthAndType<[16, 8], [I32, I64]>:$b
+                   );
+  let results = (outs AnyTypeOf<[I16, I8]>:$k1,
+                 AnyTypeOf<[I16, I8]>:$k2
+                 );
+  let assemblyFormat =
+    "$a `,` $b attr-dict `:` type($a)";
+}
+
 #endif // AVX512_OPS

mlir/include/mlir/Dialect/AVX512/AVX512Dialect.h

@@ -16,6 +16,7 @@
 #include "mlir/IR/BuiltinTypes.h"
 #include "mlir/IR/Dialect.h"
 #include "mlir/IR/OpDefinition.h"
+#include "mlir/IR/OpImplementation.h"
 #include "mlir/Interfaces/SideEffectInterfaces.h"
 
 #include "mlir/Dialect/AVX512/AVX512Dialect.h.inc"

mlir/include/mlir/Dialect/LLVMIR/LLVMAVX512.td

@@ -28,25 +28,33 @@ def LLVMAVX512_Dialect : Dialect {
 // MLIR LLVM AVX512 intrinsics using the MLIR LLVM Dialect type system
 //----------------------------------------------------------------------------//
 
-class LLVMAVX512_IntrOp<string mnemonic, list<OpTrait> traits = []> :
+class LLVMAVX512_IntrOp<string mnemonic, int numResults, list<OpTrait> traits = []> :
   LLVM_IntrOpBase<LLVMAVX512_Dialect, mnemonic,
                   "x86_avx512_" # !subst(".", "_", mnemonic),
-                  [], [], traits, 1>;
+                  [], [], traits, numResults>;
 
 def LLVM_x86_avx512_mask_rndscale_ps_512 :
-  LLVMAVX512_IntrOp<"mask.rndscale.ps.512">,
+  LLVMAVX512_IntrOp<"mask.rndscale.ps.512", 1>,
   Arguments<(ins LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type)>;
 
 def LLVM_x86_avx512_mask_rndscale_pd_512 :
-  LLVMAVX512_IntrOp<"mask.rndscale.pd.512">,
+  LLVMAVX512_IntrOp<"mask.rndscale.pd.512", 1>,
   Arguments<(ins LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type)>;
 
 def LLVM_x86_avx512_mask_scalef_ps_512 :
-  LLVMAVX512_IntrOp<"mask.scalef.ps.512">,
+  LLVMAVX512_IntrOp<"mask.scalef.ps.512", 1>,
   Arguments<(ins LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type)>;
 
 def LLVM_x86_avx512_mask_scalef_pd_512 :
-  LLVMAVX512_IntrOp<"mask.scalef.pd.512">,
+  LLVMAVX512_IntrOp<"mask.scalef.pd.512", 1>,
   Arguments<(ins LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type, LLVM_Type)>;
 
+def LLVM_x86_avx512_vp2intersect_d_512 :
+  LLVMAVX512_IntrOp<"vp2intersect.d.512", 2>,
+  Arguments<(ins LLVM_Type, LLVM_Type)>;
+
+def LLVM_x86_avx512_vp2intersect_q_512 :
+  LLVMAVX512_IntrOp<"vp2intersect.q.512", 2>,
+  Arguments<(ins LLVM_Type, LLVM_Type)>;
+
 #endif // AVX512_OPS

mlir/lib/Conversion/AVX512ToLLVM/ConvertAVX512ToLLVM.cpp

@@ -77,6 +77,29 @@ struct ScaleFOp512Conversion : public ConvertToLLVMPattern {
     return failure();
   }
 };
+
+struct Vp2IntersectOp512Conversion
+    : public ConvertOpToLLVMPattern<Vp2IntersectOp> {
+  explicit Vp2IntersectOp512Conversion(MLIRContext *context,
+                                       LLVMTypeConverter &typeConverter)
+      : ConvertOpToLLVMPattern<Vp2IntersectOp>(typeConverter) {}
+
+  LogicalResult
+  matchAndRewrite(Vp2IntersectOp op, ArrayRef<Value> operands,
+                  ConversionPatternRewriter &rewriter) const override {
+    Type elementType =
+        op.a().getType().template cast<VectorType>().getElementType();
+    if (elementType.isInteger(32))
+      return LLVM::detail::oneToOneRewrite(
+          op, LLVM::x86_avx512_vp2intersect_d_512::getOperationName(), operands,
+          *getTypeConverter(), rewriter);
+    if (elementType.isInteger(64))
+      return LLVM::detail::oneToOneRewrite(
+          op, LLVM::x86_avx512_vp2intersect_q_512::getOperationName(), operands,
+          *getTypeConverter(), rewriter);
+    return failure();
+  }
+};
 } // namespace
 
 /// Populate the given list with patterns that convert from AVX512 to LLVM.
@@ -84,6 +107,8 @@ void mlir::populateAVX512ToLLVMConversionPatterns(
     LLVMTypeConverter &converter, OwningRewritePatternList &patterns) {
   // clang-format off
   patterns.insert<MaskRndScaleOp512Conversion,
-                  ScaleFOp512Conversion>(&converter.getContext(), converter);
+                  ScaleFOp512Conversion,
+                  Vp2IntersectOp512Conversion>(&converter.getContext(),
+                                               converter);
   // clang-format on
 }

mlir/test/Conversion/AVX512ToLLVM/convert-to-llvm.mlir

@@ -16,3 +16,13 @@ func @avx512_mask_rndscale(%a: vector<16xf32>, %b: vector<8xf64>, %i32: i32, %i1
   // Keep results alive.
   return %0, %1, %2, %3 : vector<16xf32>, vector<8xf64>, vector<16xf32>, vector<8xf64>
 }
+
+func @avx512_vp2intersect(%a: vector<16xi32>, %b: vector<8xi64>)
+  -> (i16, i16, i8, i8)
+{
+  // CHECK: llvm_avx512.vp2intersect.d.512
+  %0, %1 = avx512.vp2intersect %a, %a : vector<16xi32>
+  // CHECK: llvm_avx512.vp2intersect.q.512
+  %2, %3 = avx512.vp2intersect %b, %b : vector<8xi64>
+  return %0, %1, %2, %3 : i16, i16, i8, i8
+}

mlir/test/Dialect/AVX512/roundtrip.mlir

@@ -19,3 +19,13 @@ func @avx512_scalef(%a: vector<16xf32>, %b: vector<8xf64>, %i32: i32, %i16: i16,
   %1 = avx512.mask.scalef %b, %b, %b, %i8, %i32 : vector<8xf64>
   return %0, %1: vector<16xf32>, vector<8xf64>
 }
+
+func @avx512_vp2intersect(%a: vector<16xi32>, %b: vector<8xi64>)
+  -> (i16, i16, i8, i8)
+{
+  // CHECK: avx512.vp2intersect {{.*}} : vector<16xi32>
+  %0, %1 = avx512.vp2intersect %a, %a : vector<16xi32>
+  // CHECK: avx512.vp2intersect {{.*}} : vector<8xi64>
+  %2, %3 = avx512.vp2intersect %b, %b : vector<8xi64>
+  return %0, %1, %2, %3 : i16, i16, i8, i8
+}

mlir/test/Target/avx512.mlir

@@ -29,3 +29,23 @@ llvm.func @LLVM_x86_avx512_mask_pd_512(%a: vector<8xf64>,
     (vector<8xf64>, vector<8xf64>, vector<8xf64>, i8, i32) -> vector<8xf64>
   llvm.return %1: vector<8xf64>
 }
+
+// CHECK-LABEL: define <{ i16, i16 }> @LLVM_x86_vp2intersect_d_512
+llvm.func @LLVM_x86_vp2intersect_d_512(%a: vector<16xi32>, %b: vector<16xi32>)
+  -> !llvm.struct<packed (i16, i16)>
+{
+  // CHECK: call { <16 x i1>, <16 x i1> } @llvm.x86.avx512.vp2intersect.d.512(<16 x i32>
+  %0 = "llvm_avx512.vp2intersect.d.512"(%a, %b) :
+    (vector<16xi32>, vector<16xi32>) -> !llvm.struct<packed (i16, i16)>
+  llvm.return %0 : !llvm.struct<packed (i16, i16)>
+}
+
+// CHECK-LABEL: define <{ i8, i8 }> @LLVM_x86_vp2intersect_q_512
+llvm.func @LLVM_x86_vp2intersect_q_512(%a: vector<8xi64>, %b: vector<8xi64>)
+  -> !llvm.struct<packed (i8, i8)>
+{
+  // CHECK: call { <8 x i1>, <8 x i1> } @llvm.x86.avx512.vp2intersect.q.512(<8 x i64>
+  %0 = "llvm_avx512.vp2intersect.q.512"(%a, %b) :
+    (vector<8xi64>, vector<8xi64>) -> !llvm.struct<packed (i8, i8)>
+  llvm.return %0 : !llvm.struct<packed (i8, i8)>
+}