Introduction.

Workshop PG5
Resources
3.2.3 Constants
32 bit value
Integer: -2 147 483 648 to +2 147 483 647
Floating decimal: -9.22337E+18 to +9.22337E+18
Constants are fixed values that do not change during the program. They are
written into a register.
Example: fix coefficients like PI = 3.1415.
The next example loads the register R 4 with a fixed value of ( 100 ). Then the
register R 4 is divided by 0.25. Because the register R 4 contains an integer
value and we want to divide it by a decimal value ( 0.25 ), you have to convert
R4 into a decimal value. We copy R4 into R3500 (register we are sure is not
being used), convert R3500 into a decimal value, and then divide R3500 by
0.25. The result of the division is placed into R 5. R5 is then copied into R 6,
and R6 is then converted into an integer value.
How to use
constants in
your program:
Instruction list program:
FUPLA program:
COB 0 ;Cyclic organization
0 ; block
LD R 4 ;load 100 into R 4
100
COPY R 4 ;convert the integer value
R 3500 ;from integer to
IFP R 3500 ;floating decimal
0
FDIV R 3500 ;divide the value by 0.25
2.5e-1
R 5 ; and place the result
;into R5
FBoxes: Integer: Move
Converter: Int to float
Floating decimal: Divide
Converter: Float to Int
COPY R 5
R 6
FPI R 6
0
ECOB
;convert the result back to
; integer
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