Copy or Fill

[randy]

For application purpose, what is the difference between a Fill instruction and a Copy instruction.

rmonroe

 

[rdrast]

(In AB Terms, since not specified) Copy (CPY/CPS) copies source data of one or more elements to a destination, preserving the source and overwriting the destination.

Fill (FLL) takes a single value (either constant or from a memory location) and copies that single value to all specified parts of the destination which can be one or more elements long.

N7:0 = 10 N7:1 = 20 N7:2 = 30
N7:20 = 150 N7:21 = 13 N7:22 = 372

After CPY N7:0 N7:20 3, the table looks like this:
N7:0 = 10 N7:1 = 20 N7:2 = 30
N7:20 = 10 N7:21 = 20 N7:22 = 30

After FLL 0 N7:20 3 the table looks like this:
N7:0 = 10 N7:1 = 20 N7:2 = 30
N7:20 = 0 N7:21 = 0 N7:22 = 0

 

[Ron Beaufort]

in general terms, FLL works with VALUES ... COP works with BIT PATTERNS ...

so ...

if you COP (Copy) from an INTEGER to a FLOAT (for example) then you can expect surprises with the results ...