TMS320F datasheet(123/389 Pages) TI

123 / 389 page

Add to Accumulator

ADD

7-23

Assembly Language Instructions

Execution

Increment PC, then ...

Event

Addressing mode

(ACC) + ( (data-memory address)

2shift ) → ACC

Direct or indirect

(ACC) + ( (data-memory address)

216 ) → ACC

Direct or indirect

(shift of 16)

(ACC) + k

→ ACC

Short immediate

(ACC) + lk

2shift → ACC

Long immediate

Status Bits

Affected by

Affects

Addressing mode

SXM and OVM

C and OV

Direct or indirect

OVM

C and OV

Short immediate

SXM and OVM

C and OV

Long immediate

Description

The content of the addressed data memory location or an immediate constant

is left-shifted and added to the accumulator. During shifting, low-order bits are

zero filled. High-order bits are sign extended if SXM = 1 and zero filled if

SXM = 0. The result is stored in the accumulator. When short immediate ad-

dressing is used, the addition is unaffected by SXM and is not repeatable.

If you are using indirect addressing and update the ARP, you must specify a

shift operand. However, if you do not want a shift to occur, enter a 0 for this

operand. For example:

ADD *+,0,AR2

Normally, the carry bit is set (C = 1) if the result of the addition generates a carry

and is cleared (C = 0) if it does not generate a carry. However, when adding

with a shift of 16, the carry bit is set if a carry is generated but otherwise, the

carry bit is unaffected. This allows the accumulator to generate the proper

single carry when adding a 32-bit number to the accumulator.

Words

Addressing mode

Direct, indirect, or

short immediate

Long immediate

TMS320F Datasheet(PDF) 123 Page - Texas Instruments

TMS320F Datasheet(HTML) 123 Page - Texas Instruments

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