User’s Manual U16896EJ2V0UD
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APPENDIX B INSTRUCTION SET LIST
B.1 Conventions
(1) Register symbols used to describe operands
Register Symbol
Explanation
reg1 General-purpose
registers: Used as source registers.
reg2
General-purpose registers: Used mainly as destination registers. Also used as source register in some
instructions.
reg3
General-purpose registers: Used mainly to store the remainders of division results and the higher 32 bits
of multiplication results.
bit#3
3-bit data for specifying the bit number
immX
X bit immediate data
dispX
X bit displacement data
regID System
register
number
vector
5-bit data that specifies the trap vector (00H to 1FH)
cccc
4-bit data that shows the condition codes
sp Stack
pointer
(r3)
ep
Element pointer (r30)
listX
X item register list
(2) Register symbols used to describe opcodes
Register Symbol
Explanation
R
1-bit data of a code that specifies reg1 or regID
r
1-bit data of the code that specifies reg2
w
1-bit data of the code that specifies reg3
d
1-bit displacement data
I
1-bit immediate data (indicates the higher bits of immediate data)
i
1-bit immediate data
cccc
4-bit data that shows the condition codes
CCCC
4-bit data that shows the condition codes of Bcond instruction
bbb
3-bit data for specifying the bit number
L
1-bit data that specifies a program register in the register list