d10v-subs.html

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<h5 class="subsection">Sub-Instructions</h5>



   <p>The D10V assembler takes as input a series of instructions, either one-per-line,

or in the special two-per-line format described in the next section.  Some of these

instructions will be short-form or sub-instructions.  These sub-instructions can be packed

into a single instruction.  The assembler will do this automatically.  It will also detect

when it should not pack instructions.  For example, when a label is defined, the next

instruction will never be packaged with the previous one.  Whenever a branch and link

instruction is called, it will not be packaged with the next instruction so the return

address will be valid.  Nops are automatically inserted when necessary.



   <p>If you do not want the assembler automatically making these decisions, you can control

the packaging and execution type (parallel or sequential) with the special execution

symbols described in the next section.



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