d03f30fb52
Along with the changes to rescale op attributes, commit 7208649 dropped the builtin casts between signed and signless types. However, explicitly unsigned types are still legal input and output values from the TOSA IR perspective. The change adds back the casts when the unsigned<->signless semantics are explicit in the underlying tensor types. This prevents the conversion routine from trying to generate illegal `arith` casts that are constrained to signless types. Whether the `arith` casts themselves are signed or unsigned should still depend on the rescale's `*_unsigned` attribute values. --------- Signed-off-by: Artem Gindinson <gindinson@roofline.ai>
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