Texas Instruments MSP50C614 manual Multpl Multiply and Transfer PL to Accumulator

Individual Instruction Descriptions

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

An, {adrs}

Table 4±46

Table 4±46

1b

MULTPL

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

1

1

nR+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 4.14.44.1

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.

4-138