Signed decimal-string integer addition and subtraction beyond 64-bit range, plus unsigned interpretation of an int64 bit pattern. This is fixed-capacity decimal representation, not unlimited arbitrary precision.
Package dependencies
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Build record verified 2026-10-28.
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Reviewed procedures
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Signed decimal-string integer addition and subtraction beyond 64-bit range, plus unsigned interpretation of an int64 bit pattern. This is fixed-capacity decimal representation, not unlimited arbitrary precision. Dedicated A1 driver checks 3362 signed small additions/subtractions against native integer results and five exact large-decimal identities beyond int64, including carry, borrow, ordering and cancellation. Fixed capacity and overflow are not validated.