File size: 1,186 Bytes
f25167e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | {
"name": "loop_034",
"op_type": "loop_034",
"description": "Compare many short null-terminated strings for equality",
"tags": [
"simd-loop"
],
"axes": {
"N": {
"type": "var",
"description": "Buffer length (bytes)"
}
},
"inputs": {
"a": {
"shape": [
"N"
],
"dtype": "uint8"
},
"b": {
"shape": [
"N"
],
"dtype": "uint8"
}
},
"outputs": {
"checksum": {
"shape": null,
"dtype": "uint32",
"description": "Scalar checksum"
}
},
"reference": "import numpy as np\n\ndef run(a, b):\n n = len(a); res = 0; cnt = 0; length = 13; off = 0\n while off < n:\n k = off\n while k < n and a[k] == b[k] and int(a[k]) != 0: k += 1\n av = int(a[k]) if k < n else 0\n bv = int(b[k]) if k < n else 0\n r = av - bv\n cmp = 2 if r > 0 else (3 if r < 0 else 1)\n res = (res + cnt * cmp) & 0xffffffff\n off += length; cnt += 1; length = 3 + (length + 11) % 43\n return np.uint32(res)\n",
"simd_loop_meta": {
"output_inplace": false,
"array_pad": 0,
"scratch": [],
"axes_order": []
}
}
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