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"op": "ai.onnx.Hardmax",
"fixtureArrays": {
"ort_three_dims_input_x": [1.0856307, 0.99734545, 0.2829785, 1.5062947, 0.5786002, 1.6514366, 2.4266791, 0.42891264, 1.2659363, 0.8667404, 0.6788862, 0.09470897, 1.4913896, 0.638902, 0.44398195, 0.43435127, 2.20593, 2.1867862, 1.004054, 0.3861864, 0.7373686, 1.4907321, 0.9358339, 1.175829, 1.2538806, 0.6377515, 0.9071052, 1.4286807, 0.14006872, 0.8617549, 0.25561938, 2.798589, 1.7715331, 0.69987726, 0.92746246, 0.17363568, 0.002845916, 0.6882227, 0.87953633, 0.28362733, 0.8053665, 1.7276695, 0.3908998, 0.57380587, 0.33858904, 0.011830495, 2.3923652, 0.41291216, 0.978736, 2.2381434, 1.2940853, 1.0387882, 1.7437122, 0.79806274, 0.02968323, 1.0693159, 0.8907064, 1.7548862, 1.4956441, 1.0693927],
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"onnx_backend_example_4x4_input_x": [3, 0, 1, 2, 2, 5, 1, 0, 0, 1, 3, 2, 0, 1, 2, 3]
},
"cases": [
{
"name": "f32_positive_subnormal_beats_zero_gpu_gap",
"skipGpu": {
"category": "permanent",
"reason": "Portable WGSL floating-point semantics do not guarantee preservation of the subnormal values required by this fixture. Backend evidence: WebGPU/Metal flushes subnormals to zero in f32; bit-exact subnormal preservation is unattainable on GPU."
},
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.Simple",
"notes": "A positive subnormal is strictly greater than zero; Hardmax should put the one-hot at that element rather than tie-breaking on a flushed zero."
},
"attrs": { "axis": -1 },
"inputs": {
"x": { "dtype": "float32", "shape": [1, 3], "data": { "kind": "values", "values": [-1e-40, 0.0, 1e-40] } }
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 3], "tolerance": 0 } }
},
{
"name": "f32_positive_subnormal_beats_zero_axis0_gpu_gap",
"skipGpu": {
"category": "permanent",
"reason": "Portable WGSL floating-point semantics do not guarantee preservation of the subnormal values required by this fixture. Backend evidence: WebGPU/Metal flushes subnormals to zero in f32; bit-exact subnormal preservation is unattainable on GPU."
},
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.Simple",
"notes": "Axis-0 companion for finite subnormal ordering: a positive subnormal is strictly greater than zero and should receive the one-hot."
},
"attrs": { "axis": 0 },
"inputs": {
"x": { "dtype": "float32", "shape": [3, 1], "data": { "kind": "values", "values": [-1e-40, 0.0, 1e-40] } }
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 1], "tolerance": 0 } }
},
{
"name": "f32_positive_subnormal_beats_zero_last_axis_vec4_gpu_gap",
"skipGpu": {
"category": "permanent",
"reason": "Portable WGSL floating-point semantics do not guarantee preservation of the subnormal values required by this fixture. Backend evidence: WebGPU/Metal flushes subnormals to zero in f32; bit-exact subnormal preservation is unattainable on GPU."
},
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.Simple",
"notes": "Vec4 last-axis companion: a positive subnormal is strictly greater than zero and should win over zero-valued lanes."
},
"attrs": { "axis": -1 },
"inputs": {
"x": { "dtype": "float32", "shape": [1, 4], "data": { "kind": "values", "values": [0.0, 1e-40, 0.0, -1e-40] } }
},
"outputs": {
"y": {
"dtype": "float32",
"shape": [1, 4],
"tolerance": 0,
"data": { "kind": "values", "values": [0.0, 1.0, 0.0, 0.0] }
}
}
},
{
"name": "f32_positive_subnormal_beats_zero_last_axis_subgroup_gpu_gap",
"skipGpu": {
"category": "permanent",
"reason": "Portable WGSL floating-point semantics do not guarantee preservation of the subnormal values required by this fixture. Backend evidence: WebGPU/Metal flushes subnormals to zero in f32; bit-exact subnormal preservation is unattainable on GPU."
},
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.LargeNumber",
"notes": "Subgroup last-axis companion: width 1025 bypasses the vec4 specialization, and a positive subnormal must still beat zero-valued lanes."
},
"attrs": { "axis": -1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [1, 1025],
"data": { "kind": "cycle", "values": [0.0, 1e-40, 0.0, -1e-40] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 1025], "tolerance": 0 } }
},
{
"name": "dispatch_cliff_axis_last_dim1",
"attrs": { "axis": -1 },
"inputs": { "x": { "dtype": "float32", "shape": [16776961, 1], "data": { "kind": "constant", "value": 1.0 } } },
"outputs": { "y": { "dtype": "float32", "shape": [16776961, 1], "tolerance": 0 } }
},
{
"name": "simple_last_axis",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.Simple"
},
"inputs": {
"x": { "dtype": "float32", "shape": [1, 3], "data": { "kind": "values", "values": [-1.0, 0.0, 1.0] } }
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 3] } }
},
{
"name": "onnx_backend_example_4x4",
"provenance": {
"source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_example",
"test": "test_hardmax_example"
},
"inputs": {
"x": {
"dtype": "float32",
"shape": [4, 4],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_example_4x4_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [4, 4], "tolerance": 0 } }
},
{
"name": "onnx_backend_one_hot_tie_first",
"provenance": {
"source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_one_hot",
"test": "test_hardmax_one_hot"
},
"inputs": {
"x": { "dtype": "float32", "shape": [1, 4], "data": { "kind": "values", "values": [3.0, 3.0, 3.0, 1.0] } }
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 4], "tolerance": 0 } }
},
{
"name": "large_values",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.LargeNumber"
},
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 4],
"data": { "kind": "values", "values": [0.0, 1.0, 2.0, 3.0, 10000.0, 10001.0, 10002.0, 10003.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 4] } }
},
{
"name": "ort_compact_axis0_f32",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsAxis0",
"notes": "Compact axis-0 variant covering the same non-last-axis behavior without the full ORT random tensor."
},
"attrs": { "axis": 0 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 2],
"data": { "kind": "values", "values": [1.0, 5.0, 9.0, 4.0, 7.0, 6.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 2], "tolerance": 0 } }
},
{
"name": "axis1_rank3",
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 3, 2],
"data": { "kind": "values", "values": [1.0, 9.0, 7.0, 4.0, 5.0, 6.0, 3.0, 2.0, 8.0, 1.0, 4.0, 5.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 3, 2] } }
},
{
"name": "negative_axis",
"attrs": { "axis": -2 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 3, 2],
"data": { "kind": "values", "values": [1.0, 9.0, 7.0, 4.0, 5.0, 6.0, 3.0, 2.0, 8.0, 1.0, 4.0, 5.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 3, 2] } }
},
{
"name": "ties_choose_first",
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 4],
"data": { "kind": "values", "values": [1.0, 3.0, 3.0, 2.0, 5.0, 5.0, 1.0, 5.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 4] } }
},
{
"name": "ort_axis1_nan_rows",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.Simple",
"notes": "Compatibility NaN behavior on the last axis: a leading NaN or all-NaN row produces all zeros, while a NaN after a finite incumbent does not replace the selected maximum."
},
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [4, 4],
"data": {
"kind": "values",
"values": ["NaN", 1.0, 2.0, 0.0, 1.0, "NaN", 2.0, 0.0, 1.0, 2.0, "NaN", 0.0, "NaN", "NaN", "NaN", "NaN"]
}
}
},
"outputs": {
"y": {
"dtype": "float32",
"shape": [4, 4],
"tolerance": 0,
"data": {
"kind": "values",
"values": [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
}
}
}
},
{
"name": "ort_rank3_axis1_nan_columns",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsAxis1_opset13",
"notes": "Compatibility NaN behavior on a non-last axis: leading-NaN and all-NaN reduced columns produce all zeros, while later NaNs after a finite value are ignored."
},
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 3, 2],
"data": {
"kind": "values",
"values": ["NaN", 1.0, 1.0, "NaN", 2.0, 2.0, 1.0, "NaN", 2.0, "NaN", "NaN", "NaN"]
}
}
},
"outputs": {
"y": {
"dtype": "float32",
"shape": [2, 3, 2],
"tolerance": 0,
"data": { "kind": "values", "values": [0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0] }
}
}
},
{
"name": "float16_axis0",
"attrs": { "axis": 0 },
"inputs": {
"x": {
"dtype": "float16",
"shape": [3, 2],
"data": { "kind": "values", "values": [1.0, 5.0, 4.0, 2.0, 3.0, 6.0] }
}
},
"outputs": { "y": { "dtype": "float16", "shape": [3, 2], "tolerance": 0.001 } }
},
{
"name": "rank4_axis2_ties_choose_first",
"attrs": { "axis": 2 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [1, 2, 3, 2],
"data": { "kind": "values", "values": [1.0, 9.0, 3.0, 9.0, 3.0, 8.0, 5.0, 0.0, 5.0, 1.0, 4.0, 1.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 2, 3, 2], "tolerance": 0 } }
},
{
"name": "float16_ties_choose_first",
"inputs": {
"x": {
"dtype": "float16",
"shape": [2, 4],
"data": { "kind": "values", "values": [1.0, 3.0, 3.0, 2.0, 5.0, 5.0, 1.0, 5.0] }
}
},
"outputs": { "y": { "dtype": "float16", "shape": [2, 4], "tolerance": 0 } }
},
{
"name": "last_axis_64_tie_first_f32",
"inputs": {
"x": {
"dtype": "float32",
"shape": [1, 64],
"data": {
"kind": "values",
"values": [0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 100.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 23.0, 24.0, 25.0, 26.0, 27.0, 28.0, 29.0, 30.0, 31.0, 32.0, 33.0, 34.0, 35.0, 36.0, 100.0, 38.0, 39.0, 40.0, 41.0, 42.0, 43.0, 44.0, 45.0, 46.0, 47.0, 48.0, 49.0, 50.0, 51.0, 52.0, 53.0, 54.0, 55.0, 56.0, 57.0, 58.0, 59.0, 60.0, 61.0, 62.0, 63.0]
}
}
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 64], "tolerance": 0 } }
},
{
"name": "last_axis_128_f16",
"inputs": {
"x": {
"dtype": "float16",
"shape": [2, 128],
"data": { "kind": "fillFloat32", "sinStep": 0.13, "cosStep": 0.29 }
}
},
"outputs": { "y": { "dtype": "float16", "shape": [2, 128], "tolerance": 0 } }
},
{
"name": "last_axis_1025_f32",
"inputs": {
"x": {
"dtype": "float32",
"shape": [1, 1025],
"data": { "kind": "fillFloat32", "sinStep": 0.07, "cosStep": 0.19 }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 1025], "tolerance": 0 } }
},
{
"name": "ort_three_dims_axis1_opset13",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsAxis1_opset13"
},
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/ort_three_dims_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "ort_three_dims_default_axis_opset13",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsDefaultAxis_opset13"
},
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/ort_three_dims_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "ort_three_dims_axis2_opset13",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsAxis2_opset13"
},
"attrs": { "axis": 2 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/ort_three_dims_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "ort_three_dims_negative_axis_last",
"provenance": {
"source": "onnxruntime/test/providers/cpu/math/hardmax_test.cc",
"test": "HardmaxOperator.ThreeDimsNegAxis2",
"notes": "Axis=-1 maps to the last dimension; this matches opset-13 last-axis semantics."
},
"attrs": { "axis": -1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/ort_three_dims_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_axis_0",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_axis_0" },
"attrs": { "axis": 0 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_hardmax_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_axis_1",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_axis_1" },
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_hardmax_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_axis_2",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_axis_2" },
"attrs": { "axis": 2 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_hardmax_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_default_axis",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_default_axis" },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_hardmax_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_negative_axis",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_negative_axis" },
"attrs": { "axis": -1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 4, 5],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_hardmax_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 4, 5], "tolerance": 0 } }
},
{
"name": "onnx_backend_hardmax_example",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_example" },
"inputs": {
"x": {
"dtype": "float32",
"shape": [4, 4],
"data": { "kind": "values", "values": { "$ref": "#/fixtureArrays/onnx_backend_example_4x4_input_x" } }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [4, 4], "tolerance": 0.0001 } }
},
{
"name": "onnx_backend_hardmax_one_hot",
"provenance": { "source": "cmake/external/onnx/onnx/backend/test/data/node/test_hardmax_one_hot" },
"inputs": {
"x": { "dtype": "float32", "shape": [1, 4], "data": { "kind": "values", "values": [3.0, 3.0, 3.0, 1.0] } }
},
"outputs": { "y": { "dtype": "float32", "shape": [1, 4], "tolerance": 0.0001 } }
},
{
"name": "empty_input_zero_dim",
"inputs": { "x": { "dtype": "float32", "shape": [0, 3], "data": { "kind": "values", "values": [] } } },
"outputs": { "y": { "dtype": "float32", "shape": [0, 3], "tolerance": 0 } }
},
{
"name": "rank7_last_axis",
"provenance": {
"source": "ONNX spec: Hardmax permits arbitrary rank; onnxruntime CPU coerces dims [0,axis) to rows and [axis,end) to cols with no rank cap.",
"notes": "Rank-7 last-axis coverage for the generalized last_axis_vec4 path. ORT and WebGPU both compute the normal one-hot result."
},
"attrs": { "axis": -1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 1, 1, 1, 1, 1, 4],
"data": { "kind": "values", "values": [3.0, 1.0, 4.0, 2.0, 5.0, 9.0, 1.0, 6.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 1, 1, 1, 1, 1, 4], "tolerance": 0 } }
},
{
"name": "rank7_axis0",
"provenance": {
"source": "ONNX spec: Hardmax permits arbitrary rank; onnxruntime CPU reduces over the requested axis at any rank.",
"notes": "Rank-7 non-last-axis coverage for the generic axis path. ORT and WebGPU reduce over axis 0 per inner column."
},
"attrs": { "axis": 0 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [3, 1, 1, 1, 1, 1, 2],
"data": { "kind": "values", "values": [1.0, 5.0, 9.0, 4.0, 7.0, 6.0] }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [3, 1, 1, 1, 1, 1, 2], "tolerance": 0 } }
},
{
"name": "f16_last_axis_subgroup_1025",
"provenance": {
"source": "Clean coverage: the adaptive f16 last-axis row path (dim(last) >= 1024, f16Ok) was correctness-untested (only f16 vec4 cols=128 and f16 axis-0 rank2 existed).",
"notes": "Last dim 1025 (>=1024, not %4==0) skips last_axis_vec4 and selects last_axis_row with f16. linspace 0..1025 gives exact distinct f16 integers (representable to 2048) so argmax is unambiguous at the final lane."
},
"attrs": { "axis": -1 },
"inputs": {
"x": { "dtype": "float16", "shape": [1, 1025], "data": { "kind": "linspace", "start": 0.0, "end": 1025.0 } }
},
"outputs": { "y": { "dtype": "float16", "shape": [1, 1025], "tolerance": 0 } }
},
{
"name": "f16_axis1_rank3",
"provenance": {
"source": "Clean coverage: f16 'axis' scalar fallback on a non-last axis (existing f16 fixtures only cover axis-0 rank2 and last-axis rank2).",
"notes": "Rank-3 axis=1 f16 selects the generic 'axis' variant with usesF16. Distinct per-column values avoid ties."
},
"attrs": { "axis": 1 },
"inputs": {
"x": {
"dtype": "float16",
"shape": [2, 3, 2],
"data": { "kind": "values", "values": [1.0, 9.0, 7.0, 4.0, 5.0, 6.0, 3.0, 2.0, 8.0, 1.0, 4.0, 5.0] }
}
},
"outputs": { "y": { "dtype": "float16", "shape": [2, 3, 2], "tolerance": 0 } }
},
{
"name": "vec4_lone_finite_among_neg_inf",
"attrs": { "axis": -1 },
"provenance": {
"source": "Coverage gap: vec4 last-axis path with -Infinity seed. Existing vec4 tests use finite fillFloat32/values; a row of all -Infinity except one finite element is untested.",
"notes": "cols=8 selects last_axis_vec4. Only index 6 is finite (3.0); every other lane is -Infinity, so the one-hot must land at index 6."
},
"inputs": {
"x": {
"dtype": "float32",
"shape": [1, 8],
"data": {
"kind": "values",
"values": ["-Infinity", "-Infinity", "-Infinity", "-Infinity", "-Infinity", "-Infinity", 3.0, "-Infinity"]
}
}
},
"outputs": {
"y": {
"dtype": "float32",
"shape": [1, 8],
"tolerance": 0,
"data": { "kind": "values", "values": [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0] }
}
}
},
{
"name": "subgroup_cross_slot_lowest_index_tie_1025",
"attrs": { "axis": -1 },
"provenance": {
"source": "Coverage gap: subgroup last-axis lowest-index tie reduction. Existing 1025-wide subgroup tests use unique-max linspace, so cross-subgroup/slot ties are untested.",
"notes": "cols=1025 (>=1024, %4!=0) selects last_axis_row, whose capability-adaptive reduction uses subgroup or portable execution. Alternating 0/1 makes 1.0 the max at every odd index; first occurrence is index 1, so the one-hot must land at index 1 despite ties spanning multiple reduction slots."
},
"inputs": { "x": { "dtype": "float32", "shape": [1, 1025], "data": { "kind": "cycle", "values": [0.0, 1.0] } } },
"outputs": { "y": { "dtype": "float32", "shape": [1, 1025], "tolerance": 0 } }
},
{
"name": "f16_subgroup_all_equal_tie_index0_1025",
"attrs": { "axis": -1 },
"provenance": {
"source": "Coverage gap: the adaptive f16 last-axis row path under a full tie. The existing f16_last_axis_subgroup_1025 fixture uses distinct linspace values, so an all-equal f16 row is untested.",
"notes": "cols=1025 (>=1024, %4!=0) with f16 selects the adaptive last_axis_row path. All values equal (1.0) => first max is index 0, so the one-hot must land at index 0."
},
"inputs": { "x": { "dtype": "float16", "shape": [1, 1025], "data": { "kind": "constant", "value": 1.0 } } },
"outputs": { "y": { "dtype": "float16", "shape": [1, 1025], "tolerance": 0 } }
},
{
"name": "axis_tree_axis0_1024x2",
"attrs": { "axis": 0 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [1024, 2],
"data": { "kind": "fillFloat32", "sinStep": 0.013, "cosStep": 0.027, "scale": 2.0 }
}
},
"outputs": { "y": { "dtype": "float32", "shape": [1024, 2], "tolerance": 0 } }
},
{
"name": "rank8_last_axis",
"attrs": { "axis": -1 },
"inputs": {
"x": {
"dtype": "float32",
"shape": [2, 1, 1, 1, 1, 1, 2, 4],
"data": {
"kind": "values",
"values": [3.0, 1.0, 4.0, 2.0, 5.0, 9.0, 1.0, 6.0, 2.0, 7.0, 1.0, 8.0, 0.5, 0.25, 3.5, 1.25]
}
}
},
"outputs": { "y": { "dtype": "float32", "shape": [2, 1, 1, 1, 1, 1, 2, 4], "tolerance": 0 } }
}
]
}
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