Xilinx MicroBlaze Reference Manual page 189

cmp
Integer Compare
cmp
cmpu
0 0 0 1 0 1
0 6
Description
The contents of register rA is subtracted from the contents of register rB and the result is placed into
register rD.
The MSB bit of rD is adjusted to shown true relation between rA and rB. If the U bit is set, rA and
rB is considered unsigned values. If the U bit is clear, rA and rB is considered signed values.
Pseudocode
Registers Altered
•
Latency
•
MicroBlaze Processor Reference Guide
UG081 (v14.7)
rD, rA, rB
rD, rA, rB
rD rA
1
1
←
(rA) + 1
(rD) (rB) +
←
(rD)(MSB) (rA) > (rB)
rD
1 cycle
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compare rB with rA (signed)
compare rB with rA (unsigned)
rB 0 0 0 0 0 0 0 0 0 U 1
1 2
6 1
Instructions
3
1
189
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