Installation manual

Publication 1747-RM001G-EN-P - November 2008

4-24 Math Instructions

Absolute (ABS)

Use the ABS instruction to calculate the absolute value of the Source and place

the result in the Destination. This instruction supports integer and floating

point values. Use this instruction with SLC 5/03 (OS302), SLC 5/04 (OS401),

and SLC 5/05 processors.

Entering Parameters

Enter the following parameters when programming this instruction.

• Source can be a word address, an integer constant, floating point data

element, or a floating point constant

• Destination can only be a word address or a floating point data element

Updates to Arithmetic Status Bits

The arithmetic status bits are found in Word 0, bits 0 to 3 in the status file.

After an instruction is executed, the arithmetic status bits in the status file are

updated

ABS

Absolute Value

Source N7:34

Dest N7:35

ABS

Output Instruction

Fixed SLC

5/01

SLC

5/02

SLC

5/03

SLC

5/04

SLC

5/05

•••

Table 4.15 Processor Function

With this Bit The Processor

S:0/0 Carry (C) always resets.

S:0/1 Overflow (V) always resets with a floating point value; sets if the input is

-32,768 (integer value).

S:0/2 Zero (Z) sets when destination value is zero; otherwise resets.

S:0/3 Sign (S) always resets.