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Individual Instruction Descriptions
4-141Assembly Language Instructions
4.14.46 MULTPLS Multiply String and Transfer PL to Acumulator
Syntax
[label] name dest, src Clock, clk Word, w With RPT, clk Class
MULTPLS An, {adrs} Table 4–46 Table 4–46 1b
MULTPLS An[~], An[~] n
S
+3 1 n
R
+3 3
Execution PH, PL ⇐ MR * src
An ⇐ 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 An, {adrs}
0 1 1 0 0 0 1 An adrs
x dma16 (for direct) or offset16 (long relative) [see section 4.13]
MULSPL S An[~], An[~] 1 1 1 0 0 1 1 An 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 An string.
Syntax Description
MULTPLS An, {adrs} Multiply MR by effective data memory string, move PL to An
MULTPLS An[~], An[~] Multiply MR by An[~] string, move PL to An[~]
See Also MULTPL, MULAPL, MULAPLS, MULSPL, MULSPLS
Example 4.14.46.1 MULTPLS A0, *R3++
Multiply the contents of R3 with MR register and store PL in accumulator string A0. Increment R3
by 2.
Example 4.14.46.2 MULTPLS A2, A2~
Multiply MR register to accumulator string A2~ and store PL to accumulator string A2.