8.5.25. cmpgeu
Instruction
compare greater than or equal unsigned
Operation
if ((unsigned) rA >= (unsigned) rB)
then rC ← 1
else rC ← 0
Assembler Syntax
cmpgeu rC, rA, rB
Example
cmpgeu r6, r7, r8
Description
If rA >= rB, then stores 1 to rC; otherwise stores 0 to rC.
Usage
cmpgeu
performs the unsigned >= operation of the C
programming language.
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
Bit Fields
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
A
B
C
0x28
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x28
0
0x3a
8.5.26. cmpgeui
Instruction
compare greater than or equal unsigned immediate
Operation
if ((unsigned) rA >= (unsigned) (0x0000 : IMM16))
then rB ← 1
else rB ← 0
Assembler Syntax
cmpgeui rB, rA, IMM16
Example
cmpgeui r6, r7, 100
Description
Zero-extends the 16-bit immediate value IMM16 to 32 bits
and compares it to the value of rA. If rA >= (0x0000 :
IMM16), then
cmpgeui
stores 1 to rB; otherwise stores 0 to
rB.
Usage
cmpgeui
performs the unsigned >= operation of the C
programming language.
Exceptions
None
Instruction Type
I
Instruction Fields
A
= Register index of operand rA
B
= Register index of operand rB
IMM16
= 16-bit unsigned immediate value
8. Instruction Set Reference
NII-PRG | 2018.04.18
Nios II Processor Reference Guide
188
