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9.8.2.3 Special Characters

; and # are the line comment characters.

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.

The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.