9.12.2.5 Register Names

You can use the predefined symbols ‘r0’ through ‘r63’ to refer to the D30V registers. You can also use ‘sp’ as an alias for ‘r63’ and ‘link’ as an alias for ‘r62’. The accumulators are ‘a0’ and ‘a1’.

The D30V 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

f2

Flag 2

f3

Flag 3

f4

Flag 4

f5

Flag 5

f6

Flag 6

f7

Flag 7

s

Same as flag 4 (saturation flag)

v

Same as flag 5 (overflow flag)

va

Same as flag 6 (sticky overflow flag)

c

Same as flag 7 (carry/borrow flag)

b

Same as flag 7 (carry/borrow flag)