Store/Retrieve WC,WZ ?

scotta

How do you Store/Retrieve WC,WZ ?

Scott

Bergamot

Cue desilva in 3, 2, 1...

Mike Green

You use conditional execution to do something or not do something that stores the value in a memory location. For example:

     if_c   or     saved,#1
     if_nc andn saved,#1
     if_z   or     saved,#2
     if_nz andn saved,#2

or

             mov  saved,#0
     if_c   or     saved,#1
     if_z   or     saved,#2

rokicki

To make restoration easier, you may want to set the bits so you can restore them in a single operation.
Something like this might work:

        mov saved,#0
if_c   or saved,hibit
if_nz or saved,#1

Then to restore you just need to

       add saved,saved wc,wz

for a destructive save, or

<pre>
mov acc,saved
add acc,saved wc,wz
</pre>

for a nondestructive save.

hippy

I haven't tested it but aren't the MUX opcodes useful here ...

' To save both flags ...

MUXNZ flags,#2
MUXC  flags,#1

' To reload both flags ...

SHR flags,#1 WC, WZ, NR

Mike Green

Thanks, hippy. That's even cleaner and shorter.