else rC ← 0
Assembler Syntax
cmpge rC, rA, rB
Example
cmpge r6, r7, r8
Description
If rA >= rB, then stores 1 to rC; otherwise stores 0 to rC.
Usage
cmpge
performs the signed >= 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
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
0x08
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x08
0
0x3a
8.5.24. cmpgei
Instruction
compare greater than or equal signed immediate
Operation
if ((signed) rA >= (signed) σ(IMM16))
then rB ← 1
else rB ← 0
Assembler Syntax
cmpgei rB, rA, IMM16
Example
cmpgei r6, r7, 100
Description
Sign-extends the 16-bit immediate value IMM16 to 32 bits
and compares it to the value of rA. If rA >= σ(IMM16), then
cmpgei
stores 1 to rB; otherwise stores 0 to rB.
Usage
cmpgei
performs the signed >= 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
IMM16
= 16-bit signed immediate value
Bit Fields
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
A
B
IMM16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
IMM16
0x08
8. Instruction Set Reference
NII-PRG | 2018.04.18
Nios II Processor Reference Guide
187
