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[CODEGEN] ARM Popcount lowering rule and codegen updates (apache#1235)
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Original file line number | Diff line number | Diff line change |
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import tvm | ||
import re | ||
import os | ||
import ctypes | ||
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def test_popcount(): | ||
target = 'llvm -target=armv7l-none-linux-gnueabihf -mcpu=cortex-a53 -mattr=+neon' | ||
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def check_correct_assembly(type, elements, counts): | ||
n = tvm.convert(elements) | ||
A = tvm.placeholder(n, dtype=type, name='A') | ||
B = tvm.compute(A.shape, lambda i: tvm.popcount(A[i]), name='B') | ||
s = tvm.create_schedule(B.op) | ||
s[B].vectorize(s[B].op.axis[0]) | ||
f = tvm.build(s, [A, B], target) | ||
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# Verify we see the correct number of vpaddl and vcnt instructions in the assembly | ||
assembly = f.get_source('asm') | ||
matches = re.findall("vpaddl", assembly) | ||
assert (len(matches) == counts) | ||
matches = re.findall("vcnt", assembly) | ||
assert (len(matches) == 1) | ||
check_correct_assembly('uint16', 8, 1) | ||
check_correct_assembly('uint16', 4, 1) | ||
check_correct_assembly('uint32', 4, 2) | ||
check_correct_assembly('uint32', 2, 2) | ||
check_correct_assembly('uint64', 2, 3) | ||
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if __name__ == "__main__": | ||
test_popcount() |