Delete comment from: Ken Shirriff's blog
It turns out that your simplified pseudocode for DAA is exactly the same as what Intel originally published in the "iAPX 88 Book", which was their very detailed document describing the processor and its instruction set.
The official description states that OF (overflow flag) is undefined after doing a DAA operation, but tests show that OF is set/reset in a deterministic manner.
Jan 31, 2023, 2:02:04 PM
Posted to Understanding the x86's Decimal Adjust after Addition (DAA) instruction