diff options
author | jacquesguan <Jianjian.Guan@streamcomputing.com> | 2022-07-26 21:56:43 +0800 |
---|---|---|
committer | jacquesguan <Jianjian.Guan@streamcomputing.com> | 2022-08-01 14:40:50 +0800 |
commit | 16cb6ce554b7ed7b6f4df216ea4efcd782b00187 (patch) | |
tree | f4ee78300df2ae31eb7fea423138f9d2cdef3418 /mlir | |
parent | b2559f2f5ca950e917253b156bfd08ede5577cd5 (diff) |
[mlir][Math] Add constant folder for ExpM1Op.
This patch adds constant folder for ExpM1Op which only supports single and double precision floating-point.
Differential Revision: https://reviews.llvm.org/D130567
Diffstat (limited to 'mlir')
-rw-r--r-- | mlir/include/mlir/Dialect/Math/IR/MathOps.td | 1 | ||||
-rw-r--r-- | mlir/lib/Dialect/Math/IR/MathOps.cpp | 18 | ||||
-rw-r--r-- | mlir/test/Dialect/Math/canonicalize.mlir | 18 |
3 files changed, 37 insertions, 0 deletions
diff --git a/mlir/include/mlir/Dialect/Math/IR/MathOps.td b/mlir/include/mlir/Dialect/Math/IR/MathOps.td index 4bd114c38f58..75b8782d1d4e 100644 --- a/mlir/include/mlir/Dialect/Math/IR/MathOps.td +++ b/mlir/include/mlir/Dialect/Math/IR/MathOps.td @@ -420,6 +420,7 @@ def Math_ExpM1Op : Math_FloatUnaryOp<"expm1"> { %a = math.expm1 %b : f64 ``` }]; + let hasFolder = 1; } //===----------------------------------------------------------------------===// diff --git a/mlir/lib/Dialect/Math/IR/MathOps.cpp b/mlir/lib/Dialect/Math/IR/MathOps.cpp index 829db9160638..2ba640b796b2 100644 --- a/mlir/lib/Dialect/Math/IR/MathOps.cpp +++ b/mlir/lib/Dialect/Math/IR/MathOps.cpp @@ -246,6 +246,24 @@ OpFoldResult math::Exp2Op::fold(ArrayRef<Attribute> operands) { }); } +//===----------------------------------------------------------------------===// +// ExpM1Op folder +//===----------------------------------------------------------------------===// + +OpFoldResult math::ExpM1Op::fold(ArrayRef<Attribute> operands) { + return constFoldUnaryOpConditional<FloatAttr>( + operands, [](const APFloat &a) -> Optional<APFloat> { + switch (a.getSizeInBits(a.getSemantics())) { + case 64: + return APFloat(expm1(a.convertToDouble())); + case 32: + return APFloat(expm1f(a.convertToFloat())); + default: + return {}; + } + }); +} + /// Materialize an integer or floating point constant. Operation *math::MathDialect::materializeConstant(OpBuilder &builder, Attribute value, Type type, diff --git a/mlir/test/Dialect/Math/canonicalize.mlir b/mlir/test/Dialect/Math/canonicalize.mlir index 40e4b5955cf2..1a2c01699e94 100644 --- a/mlir/test/Dialect/Math/canonicalize.mlir +++ b/mlir/test/Dialect/Math/canonicalize.mlir @@ -264,3 +264,21 @@ func.func @exp2_fold_vec() -> (vector<4xf32>) { %0 = math.exp2 %v1 : vector<4xf32> return %0 : vector<4xf32> } + +// CHECK-LABEL: @expm1_fold +// CHECK-NEXT: %[[cst:.+]] = arith.constant 6.3890562 : f32 +// CHECK-NEXT: return %[[cst]] +func.func @expm1_fold() -> f32 { + %c = arith.constant 2.0 : f32 + %r = math.expm1 %c : f32 + return %r : f32 +} + +// CHECK-LABEL: @expm1_fold_vec +// CHECK-NEXT: %[[cst:.+]] = arith.constant dense<[0.000000e+00, 1.71828175, 0.000000e+00, 1.71828175]> : vector<4xf32> +// CHECK-NEXT: return %[[cst]] +func.func @expm1_fold_vec() -> (vector<4xf32>) { + %v1 = arith.constant dense<[0.0, 1.0, 0.0, 1.0]> : vector<4xf32> + %0 = math.expm1 %v1 : vector<4xf32> + return %0 : vector<4xf32> +} |