Control Flow

T32 keeps control flow simple and explicit.

Unconditional jumps

Use JMP to continue execution somewhere else.

start:
    JMP again

again:
    HLT

Conditional jumps

T32 currently provides two conditionals:

• JEQ: jump if the zero flag Z is set
• JNG: jump if the negative flag N is set

These instructions do not compare values by themselves. They rely on flags set by an earlier operation such as CMP, CMI, ADD, SUB, ADI, or SBI.

    LDA
    CMI 10
    JEQ equal_to_ten
    JNG less_than_ten

In practice:

• JEQ is how you test for equality
• JNG is how you detect a negative result after subtraction or comparison

A common loop pattern

loop:
    LDA
    CMI 0
    JEQ done
    IDP
    JMP loop
done:
    HLT

That style appears often in T32 because loops are built from a compare plus one or two jumps.