## What register should be used as the A source? word srcA = [ icode in { IRRMOVQ, IRMMOVQ, IOPQ, IPUSHQ } : rA;

## What register should be used as the A source?

word srcA $=[$

icode in $\{$ IRRMOVQ, IRMMOVQ, IOPQ, IPUSHQ $\}$ : rA;

icode in $\{$ IPOPQ, IRET $\}$ : RRSP;

$1$ : RNONE; # Don't need register

$]$;

## What register should be used as the B source?

word srcB $=[$

icode in $\{$ IOPQ, IRMMOVQ, IMRMOVQ, IIADDQ$\}$ : rB;

icode in $\{$ IPUSHQ, IPOPQ, ICALL, IRET $\}$ : RRSP;

$1$ : RNONE; # Don't need register

$]$;

## What register should be used as the E destination?

word dstE $=[$

icode in $\{$ IRRMOVQ $\}$ && Cnd : rB;

icode in $\{$ IIRMOVQ, IOPQ, IIADDQ$\}$ : rB;

icode in $\{$ IPUSHQ, IPOPQ, ICALL, IRET $\}$ : RRSP;

$1$ : RNONE; # Don't write any register

$]$;

## What register should be used as the M destination?

word dstM $=[$

icode in $\{$ IMRMOVQ, IPOPQ $\}$ : rA;

$1$ : RNONE; # Don't write any register

$]$;