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9.10.2.4 Register Names

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.

Register Pairs

r0-r1
r2-r3
r4-r5
r6-r7
r8-r9
r10-r11
r12-r13
r14-r15

The D10V also has predefined symbols for these control registers and status bits:

psw

Processor Status Word

bpsw

Backup Processor Status Word

pc

Program Counter

bpc

Backup Program Counter

rpt_c

Repeat Count

rpt_s

Repeat Start address

rpt_e

Repeat End address

mod_s

Modulo Start address

mod_e

Modulo End address

iba

Instruction Break Address

f0

Flag 0

f1

Flag 1

c

Carry flag