Instruction: Limit maximum of signed value to another signed value.

MAXS SValue1, < # > SValue2

Result: Lesser of signed SValue1 and signed SValue2 is stored in SValue1.

SValue1 (d-field) is the register containing the value to compare against SValue2 and is the destination in which to write the lesser of the two.
SValue2 (s-field) is a register or a 9-bit literal whose value is compared against SValue1.

Opcode Table:

–INSTR– ZCRI –CON– –DEST– –SRC–	Z Result	C Result	Result	Clocks
010001 001i 1111 ddddddddd sssssssss	S = 0	Signed (D < S)	Written	4

Concise Truth Table:

In					Out
Destination	Source	Z	C	Effects	Destination	Z	C
$0000_0001; 1	$FFFF_FFFF; -1	-	-	wz wc	$FFFF_FFFF; -1	0	0
$0000_0001; 1	$0000_0000; 0	-	-	wz wc	$0000_0000; 0	1	0
$0000_0001; 1	$0000_0001; 1	-	-	wz wc	$0000_0001; 1	0	0
$0000_0001; 1	$0000_0002; 2	-	-	wz wc	$0000_0001; 1	0	1
$FFFF_FFFF; -1	$0000_0001; 1	-	-	wz wc	$FFFF_FFFF; -1	0	1
$0000_0000; 0	$0000_0001; 1	-	-	wz wc	$0000_0000; 0	0	1
$0000_0001; 1	$0000_0001; 1	-	-	wz wc	$0000_0001; 1	0	0
$0000_0002; 2	$0000_0001; 1	-	-	wz wc	$0000_0001; 1	0	0

Explanation

MAXS compares the signed values of SValue1 and SValue2 and stores the lesser of the two into the SValue1 register, effectively limiting SValue1 to a maximum of SValue2.

If the WZ effect is specified, the Z flag is set (1) if SValue2 is zero (0). If the WC effect is specified, the C flag is set (1) if the signed SValue1 is less than the signed SValue2. The lesser of the two values is written to SValue1 unless the NR effect is specified.