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8. Instruction Set Reference
NII-PRG | 2018.04.18
OP
Instruction
0x03
ldbu
0x04
addi
0x05
stb
0x06
br
0x07
ldb
0x08
cmpgei
0x09
0x0A
0x0B
ldhu
0x0C
andi
0x0D
sth
0x0E
bge
0x0F
ldh
Table 94.
OPX Encodings for R-Type Instructions
OPX
Instruction
0x00
0x01
eret
0x02
roli
0x03
rol
0x04
flushp
0x05
ret
0x06
nor
0x07
mulxuu
0x08
cmpge
0x09
bret
0x0A
0x0B
ror
0x0C
flushi
0x0D
jmp
0x0E
and
0x0F
OP
Instruction
0x13
initda
0x14
ori
0x15
stw
0x16
blt
0x17
ldw
0x18
cmpnei
0x19
0x1A
0x1B
flushda
0x1C
xori
0x1D
0x1E
bne
0x1F
OPX
Instruction
0x10
cmplt
0x11
0x12
slli
0x13
sll
0x14
wrprs
0x15
0x16
or
0x17
mulxsu
0x18
cmpne
0x19
0x1A
srli
0x1B
srl
0x1C
nextpc
0x1D
callr
0x1E
xor
0x1F
mulxss
OP
Instruction
0x23
ldbuio
0x24
muli
0x25
stbio
0x26
beq
0x27
ldbio
0x28
cmpgeui
0x29
0x2A
0x2B
ldhuio
0x2C
andhi
0x2D
sthio
0x2E
bgeu
0x2F
ldhio
OPX
Instruction
0x20
cmpeq
0x21
0x22
0x23
0x24
divu
0x25
div
0x26
rdctl
0x27
mul
0x28
cmpgeu
0x29
initi
0x2A
0x2B
0x2C
0x2D
trap
0x2E
wrctl
0x2F
Nios II Processor Reference Guide
OP
Instruction
0x33
initd
0x34
orhi
0x35
stwio
0x36
bltu
0x37
ldwio
0x38
rdprs
0x39
R-type
0x3A
0x3B
flushd
0x3C
xorhi
0x3D
0x3E
0x3F
OPX
Instruction
0x30
cmpltu
0x31
add
0x32
0x33
0x34
break
0x35
0x36
sync
0x37
0x38
0x39
sub
0x3A
srai
0x3B
sra
0x3C
0x3D
0x3E
0x3F
171
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