ZealOS/src/Demo/Carry.CC

//Shows the $LK,"Carry",A="MN:Carry"$ function.  It holds the CPU carry flag.
//$LK,"U",A="MN:U"$() Unassemble to make sure it is right.

U0 BigCount()
{
	U64 lo=0,hi=0;
	"BigCount\n";
	while (hi<0x10) {
		lo+=1<<58;
		hi+=Carry;
		"%016X %016X\n",hi,lo;
	}
}

BigCount;

U0 BigShift()
{
	U64 lo=1,hi=0;
	"Big Shift\n";
	while (lo||hi) {
		hi<<=1;
		lo<<=1;
		hi+=Carry;
		"%016X %016X\n",hi,lo;
	}
}

BigShift;

U0 Branch()
{
	U64 i=0xFFCC3311,j;
	'Branch\n';
	for (j=0;j<64;j++) {
		i<<=1;
		if (Carry)
			'1';
		else
			'0';
	}
	'\n';
}

Branch;