File size: 1,146 Bytes
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"name": "loop_114",
"op_type": "loop_114",
"description": "Compute auto-correlation of an integer array with widening accumulation",
"tags": [
"simd-loop"
],
"axes": {
"n": {
"type": "var",
"description": "axis n"
},
"lags": {
"type": "var",
"description": "axis lags"
},
"scale": {
"type": "const",
"value": 4,
"description": "const scale"
}
},
"inputs": {
"data": {
"shape": [
"n"
],
"dtype": "int16"
}
},
"outputs": {
"res": {
"shape": [
"lags"
],
"dtype": "int16",
"description": "Output array"
}
},
"reference": "import numpy as np\n\ndef run(data):\n n = int(data.shape[0])\n scale = 4\n d = data.astype(np.int64)\n res = np.zeros(n, dtype=np.int16)\n for lag in range(n):\n acc = int(((d[:n - lag] * d[lag:]) >> scale).sum())\n res[lag] = np.int16(acc >> 16)\n return res\n",
"simd_loop_meta": {
"output_inplace": false,
"array_pad": 0,
"scratch": [],
"axes_order": [
"n",
"lags",
"scale"
]
}
}
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