Technical data

Arithmetic operations

Operation Operand Function

-F

: F

-G

– Add two fixed point numbers (16 bits)

Subtract one fixed point number from another (16 bits)

Multiply two fixed point numbers (16 bits)

Divide one fixed point number by another (16 bits):

quotient in ACCU-1-L, remainder in ACCU-1-H

Add two floating point numbers (32 bits)

Subtract one floating point number from another (32 bits)

Multiply two floating point numbers (32 bits)

Divide one floating point number by another (32 bits)

Arithmetic operations logically combine the contents of ACCU 1 and

ACCU 2 (e.g. ACCU 2 - ACCU 1). The result is then contained in

ACCU 1. An arithmetic operation changes the arithmetic registers as

follows (in fixed point operations only the low word):

Note

Within the supplementary operations, there are operations for

subtraction and addition of double word fixed point numbers.

In addition, you can use the

ENT operation from the set of

supplementary operations for loading ACCU 3 and ACCU 4 (see

Section 3.5.3).

Table 3-7 Arithmetic operations

ACCU 1 ACCU 2 ACCU 3 ACCU 4

before: <ACCU 1> <ACCU 2> <ACCU 3> <ACCU 4>

after: <result> <ACCU 3> <ACCU 4> <ACCU 4>

Basic Operations

CPU 928B Programming Guide

C79000-B8576-C898-01

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