9.9.2.3 Special Characters

A semicolon (‘ ; ’) can be used anywhere on a line to start a comment that extends to the end of the line.

If a ‘ # ’ appears as the first character of a line, the whole line is treated as a comment, but in this case the line could also be a logical line number directive (see Comments ) or a preprocessor control command (see Preprocessing ).

Sub-instructions may be executed in order, in reverse-order, or in parallel. Instructions listed in the standard one-per-line format will be executed sequentially. To specify the executing order, use the following symbols:

->
Sequential with instruction on the left first.
<-
Sequential with instruction on the right first.
||
Parallel
The D10V syntax allows either one instruction per line, one instruction per line with the execution symbol, or two instructions per line. For example
abs a1 -> abs r0
Execute these sequentially. The instruction on the right is in the right container and is executed second.
abs r0 <- abs a1
Execute these reverse-sequentially. The instruction on the right is in the right container, and is executed first.
ld2w r2,@r8+ || mac a0,r0,r7
Execute these in parallel.
ld2w r2,@r8+ ||
mac a0,r0,r7
Two-line format. Execute these in parallel.
ld2w r2,@r8+
mac a0,r0,r7
Two-line format. Execute these sequentially. Assembler will put them in the proper containers.
ld2w r2,@r8+ ->
mac a0,r0,r7
Two-line format. Execute these sequentially. Same as above but second instruction will always go into right container.
Since ‘ $ ’ has no special meaning, you may use it in symbol names.