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Publication 1747-RM001G-EN-P - November 2008

3-4 Comparison Instructions

Greater Than or Equal (GEQ)

Use the GEQ instruction to test whether one value (source A) is greater than

or equal to another (source B). If the value at source A is greater than or equal

to the value at source B, the instruction is logically true. If the value at source

A is less than the value at source B, the instruction is logically false.

Source A must be an address. Source B can either be a program constant or an

address. Negative integers are stored in two’s complement form.

Masked Comparison for

Equal (MEQ)

Use the MEQ instruction to compare data at a source address with data at a

compare address. Use of this instruction allows portions of the data to be

masked by a separate word.

Entering Parameters

• Source is the address of the value you want to compare.

• Mask is the address of the mask through which the instruction moves

data. The mask can also be a hexadecimal value (constant).

• Compare is an integer value or the address of the reference.

If the 16 bits of data at the source address are equal to the 16 bits of data at the

compare address (less masked bits), the instruction is true. The instruction

becomes false as soon as it detects a mismatch. Bits in the mask word mask

data when reset; they pass data when set.

GEQ

Grtr Than or Eql (A>=B)

Source A N7:10

Source B N7:11

GEQ

Input Instruction

Fixed SLC

5/01

SLC

5/02

SLC

5/03

SLC

5/04

SLC

5/05

• •••••

MEQ

Masked Equal

Source N7:12

Mask 00FFh

255<

Compare 255