45 multpl multiply and transfer pl to accumulator – Texas Instruments MSP50C6xx User Manual
Page 226
Individual Instruction Descriptions
4-140
4.14.45
MULTPL
Multiply and Transfer PL to Accumulator
Syntax
[label]
name
dest, src [, mod]
Clock, clk
Word, w
With RPT, clk
Class
MULTPL
An, {adrs}
Table 4–46
Table 4–46
1b
MULTPL
An[~], An[~] [, next A]
1
1
n
R
+3
3
Execution
[premodify AP if mod specified]
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
MULTPL An, {adrs}
0
1
1
0
0
0
0
An
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
MULTPL An[~], An[~], [next A]
1
1
1
0
0
next A
An
1
1
0
1
1
0
A~
~A
Description
Perform multiplication of multiply register (MR) and value of src. The 16 MSBs
of the 32-bit product are stored in the product high (PH) register. The 16 LSBs
of the product (contained in product low (PL) register) are stored in An. Certain
restrictions apply to the use of this instruction when interrupts are occuring in
the background. See Section 4.8 for more detail.
Syntax
Description
MULTPL {adrs}
Multiply MR by data memory word, move PL to An
MULTPL An[~], An[~] [, next A]
Multiply MR by An[~] word, move PL to An[~]
See Also
MULTPLS, MULAPL, MULAPLS, MULSPL, MULSPLS
Example 4.14.45.1
MULTPL A0, *R3++
Multiply the contents of R3 with MR register and store PL in accumulator A0. Increment R3 by 2.
Example 4.14.45.2
MULTPL A2, A2~, ––A
Multiply MR register to accumulator A2~ and store PL to accumulator A2.