NEC V850E/RS1 User Manual page 835

A.1 Convention
(a) Register symbols used to describe operands
(b) Register symbols used to describe opcodes
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Appendix A
Register Symbol
reg1 General registers: Used as source registers
General registers: Used mainly as destination registers. Also used as
reg2
source register in some instructions.
General registers: Used mainly to store the remainders of division
reg3
results and the higher order 3 bits of multiplication results.
bit#3 33-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 conditions code
sp Stack pointer (SP)
ep Element pointer (r30)
listX X item register list
Register Symbol
1-bit data of a code that specifies reg1 or regID
R
1-bit data of the code that specifies reg2
r
1-bit data of the code that specifies reg3
w
1-bit displacement data
d
1-bit immediate data (indicates the higher bits of immediate data)
I
1-bit immediate data
i
4-bit data that shows the condition codes
cccc
4-bit data that shows the condition codes of Bcond instruction
CCCC
3-bit data for specifying the bit number
bbb
1-bit data that specifies a program register in the register list
L
1-bit data that specifies a system register in the register list
S
User's Manual U16702EE3V2UD00
Instruction Set List
Explanation
Explanation
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