Specifications

Instruction Type
I
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 0x36
bne
Instruction
branch if not equal
Operation
if (rA != rB)
then PC ← PC + 4 + σ(IMM16)
else PC ← PC + 4
Assembler Syntax
bne rA, rB, label
Example
bne r6, r7, top_of_loop
Description
If rA != rB, then bne transfers program control to the instruc‐
tion at label. In the instruction encoding, the offset given by
IMM16 is treated as a signed number of bytes relative to the
instruction immediately following bne. The two least-signifi‐
cant bits of IMM16 are always zero, because instruction
addresses must be word-aligned.
Exceptions
Misaligned destination address
Instruction Type
I
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
NII51017
2015.04.02
bne
8-17
Instruction Set Reference
Altera Corporation
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