Stereo System User Manual
Individual Instruction Descriptions
4-139
Assembly Language Instructions
4.14.45 MULTPLS Multiply String and Transfer PL to Acumulator
Syntax
[label] name dest, src
Clock,
clk
Word,
w
With RPT,
clk
Class
MULTPLS A
n
, {
adrs
} Table 4–46 Table 4–46 1b
MULTPLS A
n
[~], A
n
[~] n
S
+3 1 n
R
+3 3
Execution PH, PL ⇐ MR *
src
A
n
⇐ PL
PC ⇐ PC + 1
Flags Affected OF, SF, ZF, CF are set accordingly
src
is {
adrs
}: TAG bit is set accordingly
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MULSPLS A
n
, {
adrs
}
0 1 1 0 0 0 1 A
n adrs
x
dma16
(for direct) or
offset16
(long relative) [see section 4.13]
MULSPL S A
n
[~], A
n
[~] 1 1 1 0 0 1 1 A
n
1 1 0 1 1 0 A~ ~A
Description Perform multiplication of multiply register (MR) and value of
src
string. The 16
MSBs of the ((n
s
+ 3) × 16)-bit product are stored in the product high (PH)
register. The 16 LSBs of the product (contained in product low (PL) register)
stored in A
n
string.
Syntax Description
MULTPLS A
n
, {
adrs
} Multiply MR by effective data memory string, move PL to A
n
MULTPLS A
n
[~], A
n
[~] Multiply MR by A
n
[~] string, move PL to A
n
[~]
See Also MULTPL, MULAPL, MULAPLS, MULSPL, MULSPLS
Example 4.14.45.1 MULTPLS A0, *R3++
Multiply the contents of R3 with MR register and store PL in accumulator string A0. Increment R3
by 2.
Example 4.14.45.2 MULTPLS A2, A2~
Multiply MR register to accumulator string A2~ and store PL to accumulator string A2.