Xilinx MicroBlaze Reference Manual page 15

Table 2-5: Instruction Set Nomenclature (Continued)
Symbol
= Equality comparison
!= Inequality comparison
> Greater than comparison
>= Greater than or equal comparison
< Less than comparison
<= Less than or equal comparison
+ Arithmetic add
* Arithmetic multiply
/ Arithmetic divide
>> x Bit shift right x bits
<< x Bit shift left x bits
and Logic AND
or Logic OR
xor Logic exclusive OR
op1 if cond else op2 Perform op1 if condition cond is true, else perform op2
& Concatenate. E.g. "0000100 & Imm7" is the concatenation of the fixed field "0000100" and a 7 bit
immediate value.
signed Operation performed on signed integer data type. All arithmetic operations are performed on signed
word operands, unless otherwise specified
unsigned Operation performed on unsigned integer data type
float Operation performed on floating point data type
clz(r) Count leading zeros
Table 2-6: MicroBlaze Instruction Set Summary
Type A
Type B
ADD Rd,Ra,Rb
RSUB Rd,Ra,Rb
ADDC Rd,Ra,Rb
RSUBC Rd,Ra,Rb
ADDK Rd,Ra,Rb
RSUBK Rd,Ra,Rb
ADDKC Rd,Ra,Rb
MicroBlaze Processor Reference Guide
UG081 (v14.7)
0-5 6-10 11-15 16-20
0-5 6-10 11-15
000000 Rd Ra
000001 Rd Ra
000010 Rd Ra
000011 Rd Ra
000100 Rd Ra
000101 Rd Ra
000110 Rd Ra
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Description
21-31
16-31
Rb 00000000000 Rd := Rb + Ra
Rb 00000000000 Rd := Rb + Ra + 1
Rb 00000000000 Rd := Rb + Ra + C
Rb 00000000000 Rd := Rb + Ra + C
Rb 00000000000 Rd := Rb + Ra
Rb 00000000000 Rd := Rb + Ra + 1
Rb 00000000000 Rd := Rb + Ra + C
Instructions
Semantics
15
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