MicroBlaze Processor Reference Guide www.xilinx.com 15
UG081 (v6.0) June 1, 2006 1-800-255-7778
Instructions
R
<< 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 theconcatenation of the fixed field“0000100” and
a 7 bit immediate value.
signed Operationperformedonsignedintegerdatatype.Allarithmeticoperationsareperformed
on signed word operands, unless otherwise specified
unsigned Operation performed on unsigned integer data type
float Operation performed on floating point data type
Table 1-5: Instruction Set Nomenclature
Symbol Description
Table 1-6: 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
RSUBKC Rd,Ra,Rb 000111 Rd Ra Rb 00000000000 Rd := Rb + Ra + C
CMP Rd,Ra,Rb 000101 Rd Ra Rb 00000000001 Rd := Rb + Ra + 1
Rd[0] := 0 if (Rb >= Ra) else
Rd[0] := 1
CMPU Rd,Ra,Rb 000101 Rd Ra Rb 00000000011 Rd := Rb + Ra + 1 (unsigned)
Rd[0] := 0 if (Rb >= Ra, unsigned) else
Rd[0] := 1
ADDI Rd,Ra,Imm 001000 Rd Ra Imm Rd := s(Imm) + Ra
RSUBI Rd,Ra,Imm 001001 Rd Ra Imm Rd := s(Imm) + Ra + 1
ADDIC Rd,Ra,Imm 001010 Rd Ra Imm Rd := s(Imm) + Ra + C
RSUBIC Rd,Ra,Imm 001011 Rd Ra Imm Rd := s(Imm) + Ra + C
ADDIK Rd,Ra,Imm 001100 Rd Ra Imm Rd := s(Imm) + Ra
RSUBIK Rd,Ra,Imm 001101 Rd Ra Imm Rd := s(Imm) + Ra + 1