40 mulapl multiply and accumulate result – Texas Instruments MSP50C614 User Manual
Page 226
Individual Instruction Descriptions
4-134
4.14.40
MULAPL
Multiply and Accumulate Result
Syntax
[label]
name
dest, src [, mod]
Clock,
clk
Word,
w
With RPT,
clk
Class
MULAPL
A
n, {adrs}
Table 4–46
Table 4–46
1b
MULAPL
A
n[~], An[~] [, next A]
1
1
n
R
+3
3
Execution
[premodify AP if
mod specified]
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
MULAPL A
n, {adrs}
0
1
1
0
1
1
0
A
n
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
MULAPL A
n[~], An[~], [next A]
1
1
1
0
0
next A
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 32-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. Certain
restriction applies to the use of this instruction when interrupts are occuring in
the background. See Section 4.8 for more detail.
Syntax
Description
MULAPL {
adrs}
Multiply MR by RAM word, add PL to A
n
MULAPL A
n[~], An[~] [, next A]
Multiply MR by An[~] word, add PL to A
n[~]
See Also
MULAPLS, MULSPL, MULSPLS, MULTPL, MULTPLS
Example 4.14.40.1
MULAPL A0, *R3++
Multiply MR with the content of data memory word stored at byte location pointed by R3, add PL to
accumulator A0, and store result in accumulator A0. Increment R3 by 2.
Example 4.14.40.2
MULAPL A2, A2~, ––A
Multiply MR register to accumulator A2~, add PL to accumulator A2, and store result to accumulator
A2.