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dtc/tests/cell-overflow.dts

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dtc: Warning rather than error on possible truncation of cell values We always evaluate integer values in cell arrays as 64-bit quantities, then truncate to the size of the array cells (32-bit by default). However to detect accidental truncation of meaningful values, we give an error if the truncated portion isn't either all 0 or all 1 bits. However, this can still give counterintuitive errors. For if the user is thinking in 2's complement 32-bit arithmetic (which would be quite natural), then they'd expect the expression (-0xffffffff-2) to evaluate to -1 (0xffffffff). However in 64-bit it evaluates to 0xfffffffeffffffff which does truncate to the expected value but trips this error message. Because of this reduce the error to only a warnings, with a somewhat more helpful message. Fixes: https://github.com/dgibson/dtc/issues/74 Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2 years ago
/dts-v1/;
/ {
prop1 = < (-0xffffffff - 1) >;
prop2 = < (-0xffffffff - 2) >;
prop3 = < ((-0xffffffff - 1) * 2) >;
};