Xilinx MicroBlaze, Reference Manual

Page: 15 / 262

MicroBlaze Processor Reference Guide www.xilinx.com 15
UG081 (v14.7)
Instructions
= 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 2-5: Instruction Set Nomenclature (Continued)
Symbol Description
Table 2-6: MicroBlaze Instruction Set Summary
Type A 0-5 6-10 11-15 16-20 21-31
Semantics
Type B 0-5 6-10 11-15 16-31
ADD Rd,Ra,Rb 000000 Rd Ra Rb 00000000000 Rd := Rb + Ra
RSUB Rd,Ra,Rb 000001 Rd Ra Rb 00000000000 Rd := Rb + Ra + 1
ADDC Rd,Ra,Rb 000010 Rd Ra Rb 00000000000 Rd := Rb + Ra + C
RSUBC Rd,Ra,Rb 000011 Rd Ra Rb 00000000000 Rd := Rb + Ra + C
ADDK Rd,Ra,Rb 000100 Rd Ra Rb 00000000000 Rd := Rb + Ra
RSUBK Rd,Ra,Rb 000101 Rd Ra Rb 00000000000 Rd := Rb + Ra + 1
ADDKC Rd,Ra,Rb 000110 Rd Ra Rb 00000000000 Rd := Rb + Ra + C
Send Feedback