41 mulapls multiply string and accumulate result – Texas Instruments MSP50C614 User Manual
Page 227
Individual Instruction Descriptions
4-135
Assembly Language Instructions
4.14.41
MULAPLS
Multiply String and Accumulate Result
Syntax
[label]
name
dest, src [, mod]
Clock,
clk
Word,
w
With RPT,
clk
Class
MULAPLS
A
n, {adrs}
Table 4–46
Table 4–46
1b
MULAPLS
A
n[~], An[~]
n
S
+3
1
n
R
+3
3
Execution
PH,PL
⇐
MR *
src
dest
⇐
dest + 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
MULAPLS A
n, {adrs}
0
1
1
0
1
1
1
A
n
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
MULAPL S A
n[~], An[~], [next A]
1
1
1
0
0
1
1
A
n
1
1
0
0
1
0
A~
~A
Description
Perform multiplication of multiply register (MR) and value of
src. 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) added to
dest string.
Syntax
Description
MULAPLS {
adrs}
Multiply MR by RAM string, add PL to A
n
MULAPLS A
n[~], An[~] [, next A]
Multiply MR by An[~] string, add PL to A
n[~]
See Also
MULAPL, MULSPL, MULSPLS, MULTPL, MULTPLS
Example 4.14.41.1
MULAPLS A0, *R3++
Multiply MR with the content of data memory word string store at byte location pointed by R3, add
accumulator string A0 to PL, and store result in accumulator A0 string. Increment R3 by 2.
Example 4.14.41.2
MULAPLS A2, A2~, ––A
Multiply MR register to accumulator A2~, add accumulator string A2 to PL and store result to
accumulator A2.