You can use the predefined symbols ‘ r0 ’ through ‘ r15 ’ to refer to the D10V registers. You can also use ‘ sp ’ as an alias for ‘ r15 ’. The accumulators are ‘ a0 ’ and ‘ a1 ’. There are special register-pair names that may optionally be used in opcodes that require even-numbered registers. Register names are not case sensitive.
The D10V also has predefined symbols for these control registers and status bits: