Delta DVP-EX2 - Page 199

DVP-ES2/EX2/SS2/SA2/SX2/SE&TP Operation Manual - Programming
3-78
API Mnemonic Operands Function
Controllers
ES2/EX2/
EC5
SS2
SA2
SE
SX2
22 D MUL P
Multiplication
Type
OP
Bit Devices Word devices Program Steps
X Y M S K H KnX KnY KnM KnS T C D E F
MUL, MULP: 7 steps
DMUL, DMULP: 13 steps
S
1
*
*
*
*
*
*
*
*
*
*
S
2
*
*
*
*
*
*
*
*
*
*
D
*
*
*
*
*
*
*
PULSE
16-bit
32-bit
ES2/EX2
/EC5
SS2
SA2
SE
SX2
ES2/EX2
/EC5
SS2
SA2
SE
SX2
ES2/EX2
/EC5
SS2
SA2
SE
SX2
Operands:
S
1
: Multiplicand S
2
: Multiplicator D: Product
Explanations:
1. This instruction multiplies S
1
by S
2
in BIN format and stores the result in D. Care should be
taken on positive/negative signs of S
1
, S
2
and D when doing 16-bit and 32-bit operations.
2. MSB = 0, positive; MSB = 1, negative.
3. If operands S
1
, S
2
use index F, then only 16-bit instruction is available.
4. If operand D use index E, then only 16-bit instruction is available.
5. 16-bit BIN multiplication
b15................ b00
X =
b15................ b00 b31............ b16 b15.............b00
+1
b15 is the sign bit b15 is the sign bit
b31 is the sign bit(b15 of D+1)
b15=0,S1 is a positive value
B15=1,S1 is a negative value
b15=0,S2 is a positive value
b15=1,S2 is a negative value
b31=0,D(D+1) is a positive value
b31=1, is a negative valueD(D+1)
S 1
D
D
S
2
16-bit value x 16-bit value = 32-bit value
If D is specified with a bit device, it can designate K1 ~ K4 to store a 16-bit result. Users can
use consecutive 2 16-bit registers to store 32-bit data.
If the product of a 16-bit multiplication must be a 16-bit value (16-bit value x 16-bit value =
16-bit value), users have to use API 114 MUL16/MUL16P. Please refer to the explanation of
API 114 MUL16/MUL16P for more information.
6. 32-bit BIN multiplication
b31..b16
X
=
+1
b
31 is the sign bit b31 is the sign bit
b63 is the sign bit(b15 of D+3)
B31=0,S1(S1+1) is a positive value
b31=1,S1(S1+1) is a negative value
b31=0,S2(S2+1) is a positive value
b31=1,S2(S2+1) is a negative value
b63=0, D~(D+3) is a positive value
b63=1, D~(D+3) is a negative value
b15..b00
b31..b16 b15..b00
+1
b63. b48 b47. b32 b31. b16 b15. b00
+3 +2 +1