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5.8 Using Probability Variables ¶

The prob instruction defines a probability variable with a name in the data label of that instruction. A jprob or case instruction can define a probability variable similarly to the prob instruction or use a probability variable with a name specified instead of a numeric probability value. There are three supported types of probability variables:

• Controlled variables. They are the means of modifying a probability profile loaded into a node. A single controlled variable can occur in multiple jprob and case instructions.
• Output variables. They are the means of fetching probabilities learned while executing a node. A single output variable occurs in a single jprob or case instruction.
• Auxiliary variables. They act as constants. The assembler replaces every occurrence of an auxiliary variable in an argument of a jprob or case instruction with a probability value specified using a prob, jprob, or case instruction with a data label.

A controlled probability variable can simultaneously be an output probability variable.

An output probabilities array is the means of fetching probabilities learned for case instructions in a choice instruction block by indices of case instructions. A data label assigned to the choice instruction block is an array name.

• Variables in an Assembler Program
• Controlled Variables
• Output Variables
• Output Arrays
• Auxiliary Variables