Intel NIOS II, Owner Reference Manual

Page: 217 / 233

Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0 0 C 0x1c
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x1c 0 0x3a
8.5.70. nop
Instruction no operation
Operation None
Assembler Syntax
nop
Example
nop
Description
nop
does nothing.
Pseudo-instruction
nop
is implemented as
add r0, r0, r0
.
8.5.71. nor
Instruction bitwise logical nor
Operation rC ← ~(rA | rB)
Assembler Syntax
nor rC, rA, rB
Example
nor r6, r7, r8
Description Calculates the bitwise logical NOR of rA and rB and stores
the result in rC.
Exceptions None
Instruction Type R
Instruction Fields
A
= Register index of operand rA
B
= Register index of operand rB
C
= Register index of operand rC
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
A B C 0x06 0 0x3a
8.5.72. or
Instruction bitwise logical or
Operation rC ← rA | rB
Assembler Syntax
or rC, rA, rB
Example
or r6, r7, r8
Description Calculates the bitwise logical OR of rA and rB and stores the
result in rC.
continued...
8. Instruction Set Reference
NII-PRG | 2018.04.18
Nios II Processor Reference Guide
217