
4Ć99FST Configuration
Original Ć June 1990 CE4.2:CL6211
IFF IFF
45
INSTRUCTION NAME: IFF (if false transfer)
DESCRIPTION: This instruction transfers the SVA and SVD outputs to the function identified by
the label name contained in operand 2 based on the status of operand 1. If the status of operand 1
is 0, the transfer will take place. If the status of operand 1 is 1, no transfer will take place, and the
SVA and SVD outputs go to the next function in the FST. Restrictions on the use of IFF are the same
as for the GOTO instruction. The SVA and SVD inputs remain unchanged.
CONFIGURATION FORMAT: IFF (
Trip transfer status >>
Label name >>
Comment >>
OPERAND DESCRIPTIONS:
Trip transfer status - The name of the general register or discrete loadable function that contains
the transfer status (1 or 0).
Label name - The label that identifies where FST execution is to be transferred to. Label names
can be any string up to 12 characters consisting of characters, numbers, hyphens and
underscores.
Comment - A comment up to 255 characters long.
FUNCTION EQUATIONS:
SVA(out) = SVA(in)
SVD(out) = SVD(in)
If Trip transfer status = 1
Then no transfer
If Trip transfer status = 0
Then transfer execution to label name
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