https://www.keil.com/support/man/docs/armasm/armasm_dom1361289865686.htm https://www.keil.com/support/man/docs/armasm/armasm_dom13612... > The `BL` instruction

https://www.keil.com/support/man/docs/armasm/armasm_dom1361289865686.htm https://www.keil.com/support/man/docs/armasm/armasm_dom13612... > The `BL` instruction does not change the flags. Doesn't seem like much of an assumption to me :P