The BBC and Master Computer Public Domain Library

A5EE Floating-Point Division Entry Point

Submitted by Steve Fewell

Routine:adiv
Name: Floating-Point Division
Starting Address: &A5EE
Entry criteria: &4A and &4B (the argp) point to a 5-byte Floating-Point variable to be divided.
The FWA contains the value to divide by.
Exit: The FWA = [argp] / FWA [Normalised and Rounded].

Description:

If the FWA is zero, then issue a Division by Zero error.
Unpack the argp variable to the FWB. If the FWB is zero then exit with aclear [Clear FWA],
as the result will be zero. Otherwise, call the divide FWB by FWA division routine [&A5FA].

Disassembly for the Floating-Point Division Entry Point routine