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44 multpl multiply and transfer pl to accumulator – Texas Instruments MSP50C614 User Manual

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Individual Instruction Descriptions

4-138

4.14.44

MULTPL

Multiply and Transfer PL to Accumulator

Syntax

[label]

name

dest, src [, mod]

Clock,

clk

Word,

w

With RPT,

clk

Class

MULTPL

A

n, {adrs}

Table 4–46

Table 4–46

1b

MULTPL

A

n[~], An[~] [, next A]

1

1

n

R

+3

3

Execution

[premodify AP if

mod specified]

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

MULTPL A

n, {adrs}

0

1

1

0

0

0

0

A

n

adrs

x

dma16 (for direct) or offset16 (long relative) [see section 4.13]

MULTPL A

n[~], An[~], [next A]

1

1

1

0

0

next A

A

n

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 A

n. 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 A

n

MULTPL A

n[~], An[~] [, next A]

Multiply MR by An[~] word, move PL to A

n[~]

See Also

MULTPLS, MULAPL, MULAPLS, MULSPL, MULSPLS

Example 4.14.44.1

MULTPL A0, *R3++

Multiply the contents of R3 with MR register and store PL in accumulator A0. Increment R3 by 2.

Example 4.14.44.2

MULTPL A2, A2~, ––A

Multiply MR register to accumulator A2~ and store PL to accumulator A2.