Xilinx MicroBlaze

MicroBlaze Processor Reference Guide 232
UG984 (v2018.2) June 21, 2018 www.xilinx.com
Chapter 5: MicroBlaze Instruction Set Architecture
Table 5-2: Floating-Point Comparison Operation
Comparison Type Operand Relationship
Description OpSel (rB) > (rA) (rB) < (rA) (rB) = (rA)
isSigNaN(rA) or
isSigNaN(rB)
isQuietNaN(rA) or
isQuietNaN(rB)
Unordered
000
(rD) ← 0 (rD) ← 0 (rD) ← 0 (rD) ← 1
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 1
Less-than
001
(rD) ← 0 (rD) ← 1 (rD) ← 0 (rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
Equal
010
(rD) ← 0 (rD) ← 0 (rD) ← 1 (rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 0
Less-or-equal
011
(rD) ← 0 (rD) ← 1 (rD) ← 1 (rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
Greater-than
100
(rD) ← 1 (rD) ← 0 (rD) ← 0 (rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
Not-equal
101
(rD) ← 1 (rD) ← 1 (rD) ← 0 (rD) ← 1
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 1
Greater-or-equal
110
(rD) ← 1 (rD) ← 0 (rD) ← 1 (rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
(rD) ← 0
FSR[IO] ← 1
ESR[EC] ← 00110
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