Propeller Manual

MINS – Assembly Language Reference
MINS
Instruction: Limit minimum of signed value to another signed value.
MINS SValue1, 〈#〉 SValue2
Result: Greater 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 greater 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
010000 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 $0000_0002; 2 - -
wz wc
$0000_0002; 2 0 1
$0000_0001; 1 $0000_0001; 1 - -
wz wc
$0000_0001; 1 0 0
$0000_0001; 1 $0000_0000; 0 - -
wz wc
$0000_0001; 1 1 0
$0000_0001; 1 $FFFF_FFFF; -1 - -
wz wc
$0000_0001; 1 0 0
$0000_0002; 2 $0000_0001; 1 - -
wz wc
$0000_0002; 2 0 0
$0000_0001; 1 $0000_0001; 1 - -
wz wc
$0000_0001; 1 0 0
$0000_0000; 0 $0000_0001; 1 - -
wz wc
$0000_0001; 1 0 1
$FFFF_FFFF; -1 $0000_0001; 1 - -
wz wc
$0000_0001; 1 0 1
Explanation
MINS compares the signed values of SValue1 and SValue2 and stores the greater of the two
into the SValue1 register, effectively limiting SValue1 to a minimum 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
greater of the two values is written to SValue1 unless the
NR effect is specified.
Page 310 · Propeller Manual v1.1