This patch adds constant folder for ExpOp which only supports single and double precision floating-point.
Differential Revision: https://reviews.llvm.org/D130318
%a = math.exp %b : f64
```
}];
+ let hasFolder = 1;
}
//===----------------------------------------------------------------------===//
});
}
+//===----------------------------------------------------------------------===//
+// ExpOp folder
+//===----------------------------------------------------------------------===//
+
+OpFoldResult math::ExpOp::fold(ArrayRef<Attribute> operands) {
+ return constFoldUnaryOpConditional<FloatAttr>(
+ operands, [](const APFloat &a) -> Optional<APFloat> {
+ switch (a.getSizeInBits(a.getSemantics())) {
+ case 64:
+ return APFloat(exp(a.convertToDouble()));
+ case 32:
+ return APFloat(expf(a.convertToFloat()));
+ default:
+ return {};
+ }
+ });
+}
+
/// Materialize an integer or floating point constant.
Operation *math::MathDialect::materializeConstant(OpBuilder &builder,
Attribute value, Type type,
%0 = math.log %v1 : vector<4xf32>
return %0 : vector<4xf32>
}
+
+// CHECK-LABEL: @exp_fold
+// CHECK-NEXT: %[[cst:.+]] = arith.constant 7.3890562 : f32
+// CHECK-NEXT: return %[[cst]]
+func.func @exp_fold() -> f32 {
+ %c = arith.constant 2.0 : f32
+ %r = math.exp %c : f32
+ return %r : f32
+}
+
+// CHECK-LABEL: @exp_fold_vec
+// CHECK-NEXT: %[[cst:.+]] = arith.constant dense<[2.71828175, 7.3890562, 20.085537, 54.5981483]> : vector<4xf32>
+// CHECK-NEXT: return %[[cst]]
+func.func @exp_fold_vec() -> (vector<4xf32>) {
+ %v1 = arith.constant dense<[1.0, 2.0, 3.0, 4.0]> : vector<4xf32>
+ %0 = math.exp %v1 : vector<4xf32>
+ return %0 : vector<4xf32>
+}
%1 = math.exp %0 : f32
vector.print %1 : f32
- // CHECK: 0.778802, 2.117, 2.71828, 3.85742
+ // CHECK: 0.778801, 2.117, 2.71828, 3.85743
%2 = arith.constant dense<[-0.25, 0.75, 1.0, 1.35]> : vector<4xf32>
%3 = math.exp %2 : vector<4xf32>
vector.print %3 : vector<4xf32>
%exp_zero = math.exp %zero : f32
vector.print %exp_zero : f32
- // CHECK: 1.17549e-38, 1.38879e-11, 7.20049e+10, inf
+ // CHECK: 2.22736e-39, 1.38879e-11, 7.20049e+10, inf
%special_vec = arith.constant dense<[-89.0, -25.0, 25.0, 89.0]> : vector<4xf32>
%exp_special_vec = math.exp %special_vec : vector<4xf32>
vector.print %exp_special_vec : vector<4xf32>
%1 = math.expm1 %0 : f32
vector.print %1 : f32
- // CHECK: -0.00995016, 0.0100502, 0.648721, 6.38905
+ // CHECK: -0.00995017, 0.0100502, 0.648721, 6.38906
%2 = arith.constant dense<[-0.01, 0.01, 0.5, 2.0]> : vector<4xf32>
%3 = math.expm1 %2 : vector<4xf32>
vector.print %3 : vector<4xf32>