This patch adds constant folder for AtanOp which only supports single and double precision floating-point.
Differential Revision: https://reviews.llvm.org/D130983
%a = math.atan %b : f64
```
}];
+ let hasFolder = 1;
}
//===----------------------------------------------------------------------===//
}
//===----------------------------------------------------------------------===//
+// AtanOp folder
+//===----------------------------------------------------------------------===//
+
+OpFoldResult math::AtanOp::fold(ArrayRef<Attribute> operands) {
+ return constFoldUnaryOpConditional<FloatAttr>(
+ operands, [](const APFloat &a) -> Optional<APFloat> {
+ switch (a.getSizeInBits(a.getSemantics())) {
+ case 64:
+ return APFloat(atan(a.convertToDouble()));
+ case 32:
+ return APFloat(atanf(a.convertToFloat()));
+ default:
+ return {};
+ }
+ });
+}
+
+//===----------------------------------------------------------------------===//
// CeilOp folder
//===----------------------------------------------------------------------===//
return %0 : vector<4xf32>
}
+// CHECK-LABEL: @atan_fold
+// CHECK-NEXT: %[[cst:.+]] = arith.constant 0.785398185 : f32
+// CHECK-NEXT: return %[[cst]]
+func.func @atan_fold() -> f32 {
+ %c = arith.constant 1.0 : f32
+ %r = math.atan %c : f32
+ return %r : f32
+}
+
+// CHECK-LABEL: @atan_fold_vec
+// CHECK-NEXT: %[[cst:.+]] = arith.constant dense<[0.000000e+00, 0.785398185, 0.000000e+00, 0.785398185]> : vector<4xf32>
+// CHECK-NEXT: return %[[cst]]
+func.func @atan_fold_vec() -> (vector<4xf32>) {
+ %v1 = arith.constant dense<[0.0, 1.0, 0.0, 1.0]> : vector<4xf32>
+ %0 = math.atan %v1 : vector<4xf32>
+ return %0 : vector<4xf32>
+}
// -------------------------------------------------------------------------- //
func.func @atan() {
- // CHECK: -0.785184
+ // CHECK: -0.785398
%0 = arith.constant -1.0 : f32
%atan_0 = math.atan %0 : f32
vector.print %atan_0 : f32
- // CHECK: 0.785184
+ // CHECK: 0.785398
%1 = arith.constant 1.0 : f32
%atan_1 = math.atan %1 : f32
vector.print %atan_1 : f32
- // CHECK: -0.463643
+ // CHECK: -0.463648
%2 = arith.constant -0.5 : f32
%atan_2 = math.atan %2 : f32
vector.print %atan_2 : f32
- // CHECK: 0.463643
+ // CHECK: 0.463648
%3 = arith.constant 0.5 : f32
%atan_3 = math.atan %3 : f32
vector.print %atan_3 : f32