Specifications

Description
If rA == rB, then stores 1 to rC; otherwise, stores 0 to rC.
Usage
cmpeq performs the == operation of the C programming
language. Also, cmpeq can be used to implement the C logical
negation operator “!”.
cmpeq rC, rA, r0
# Implements rC = !rA
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 0x20
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x20 0 0x3a
cmpeqi
Instruction
compare equal immediate
Operation
if (rA σ(IMM16))
then rB ← 1
else rB ← 0
Assembler Syntax
cmpeqi rB, rA, IMM16
Example
cmpeqi 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), cmpeqi
stores 1 to rB; otherwise stores 0 to rB.
Usage
cmpeqi performs the == operation of the C programming
language.
Exceptions
None
Instruction Type
I
8-22
cmpeqi
NII51017
2015.04.02
Altera Corporation
Instruction Set Reference
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