TMS320F datasheet(120/389 Pages) TI

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ABS

Absolute Value of Accumulator

7-20

Syntax

ABS

Operands

None

Opcode

Execution

Increment PC, then ...

|(ACC)|

→ ACC; 0 → C

Status Bits

Affected by

Affects

OVM

C and OV

This instruction is not affected by SXM

Description

If the contents of the accumulator are greater than or equal to zero, the accu-

mulator is unchanged by the execution of ABS. If the contents of the accumula-

tor are less than zero, the accumulator is replaced by its 2s-complement value.

The carry bit (C) on the ’C20x is always reset to zero by the execution of this

instruction.

Note that 8000 0000h is a special case. When the overflow mode is not set

(OVM = 0), the ABS of 8000 0000h is 8000 0000h. When the overflow mode

is set (OVM = 1), the ABS of 8000 0000h is 7FFF FFFFh. In either case, the

OV status bit is set.

Words

Cycles for a Single ABS Instruction

ROM

DARAM

SARAM

External

1+p

Cycles for a Repeat (RPT) Execution of an ABS Instruction

ROM

DARAM

SARAM

External

n+p

Cycles

TMS320F Datasheet(PDF) 120 Page - Texas Instruments

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