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Chapter 15. D10V Dependent Features

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.

15.2.3. 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.