Revision as of 07:20, 9 November 2019 (edit) 77.243.191.41 (talk) (Fixed verb) ← Older edit		Latest revision as of 07:24, 9 November 2019 (edit) (undo) 77.243.191.41 (talk) (Typo)
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	| {{mips|SEB}} || Sign-Extend Byte		| {{mips|SEB}} || Sign-Extend Byte
	|-		|-
−	| {{mips|SEH}} || Sign-Extend Halftword	+	| {{mips|SEH}} || Sign-Extend Halfword
	|-		|-
	| {{mips|SLT}} || Set on Less Than		| {{mips|SLT}} || Set on Less Than

---

Latest revision as of 07:24, 9 November 2019

MIPS32 Designer: MIPS Technologies, Inc. Bits: 32-bits Introduced: 1999 Version: Revision 5.3 Design: RISC Type: Register-Register Encoding: Fixed-length Branching: Condition Register Endianness: Bi-endian Extensions: SPECIAL2, COP2, LWC2, SWC2, LDC2, SDC2 Application-specific extension: MIPS16e, MCU, SmartMIPS Multimedia extension: MIPS-3D Registers General purpose: 32 Floating point: 32 Special purpose: PRId

The MIPS32 instruction set is an instruction set standard published in 1999 that was promulgated by MIPS Technologies after its demerger from Silicon Graphics in 1998. The MIPS32 instruction set was developed along side the MIPS64 Instruction Set which includes 64-bit instructions. The MIP32 standard included coprocessor 0 control instructions for the first time. Today, the MIP32 instruction set is the most common MIPS instruction set, compatible with most CPUs. Due to its relative simplicity, the MIP32 instruction set is also the most common instruction set taught in computer architecture university courses.

The latest MIPS32 revision is revision 5, which added a set of new memory-efficient operations for large memory footprint applications.

History[edit]

The MIPS32 instruction set architecture was first published in 1999 by MIPS Technologies by it has demerged from Silicon Graphics in 1998. MIPS32 is largely a superset of the MIPS II ISA.

Release 2[edit]

Release 2 was first introduced in revision 1 of the MIPS32 ISA in 2002. Release 2 added 20 new instructions: DI, EHB, EI, EXT, INS, JALR.HB, JR.HB, MFHC1, MFHC2, MTHC1, MTHC2, RDHWR, RDPGPR, ROTR, ROTRV, SEB, SEH, SYNCI, WRPGPR, and WSBH. Release 2 also added support for 64-bit FPUs.

Release 3[edit]

Release 3 was first introduced in revision 3 of the MIPS32 ISA in 2010. The release added the JALX instruction.

Release 4[edit]

Release 4 was skipped because MIPS Technologies was being auctioned off. Officially the reason was given as "Release 4 because the number four is considered by many to be inauspicious or unlucky".^[1]

Release 5[edit]

Release 5 was announced in late 2012. The release added a new set of instructions called Enhanced Virtual Addressing (EVA) to allow more efficient use of memory of larger footprint kernels. The following EVA Load/Store instructions were added: LBE, LBUE, LHE, LHUE, LWE, SBE, SHE, SWE, CACHEE, PREFE, LLE, SCE, LWLE, LWRE, SWLE, SWRE.

Instructions list[edit]

Below is a list of the MIPS32 Instruction Set

• CPU Instructions
  • Arithmetic Instructions
  • Branch Instructions
  • Jump Instructions
  • Control Instructions
  • Memory Control Instructions
  • Logical Instruction
  • Insert/Extract Instructions
  • Move Instructions
  • Shift Instructions
  • Trap Instructions
• FPU Instructions
  • Arithmetic Instructions
  • Branch Instructions
  • Compare Instructions
  • Convert Instructions
  • Memory Control Instructions
  • Move Instructions
• Coprocessor Instructions
  • Branch Instructions
  • Execute Instructions
  • Memory control Instructions
  • Move Instructions
• Privileged Instructions
• EJTAG Instructions

Arithmetic instructions[edit]

Mnemonic	Description
ADD	Add Word
ADDI	Add Immediate Word
ADDIU	Add Immediate Unsigned Word
ADDU	Add Unsigned Word
CLO	Count Leading Ones in Word
CLZ	Count Leading Zeros in Word
DIV	Divide Word
DIVU	Divide Unsigned Word
MADD	Multiply and Add Word to Hi, Lo
MADDU	Multiply and Add Unsigned Word to Hi, Lo
MSUB	Multiply and Subtract Word to Hi, Lo
MSUBU	Multiply and Subtract Unsigned Word to Hi, Lo
MUL	Multiply Word to GPR
MULT	Multiply Word
MULTU	Multiply Unsigned Word
SEB	Sign-Extend Byte
SEH	Sign-Extend Halfword
SLT	Set on Less Than
SLTI	Set on Less Than Immediate
SLTIU	Set on Less Than Immediate Unsigned
SLTU	Set on Less Than Unsigned
SUB	Subtract Word
SUBU	Subtract Unsigned Word

Branch instructions[edit]

Note that all the likely branches have been obsoleted; they will be removed in future revisions of the MIPS32 architecture. Software is strongly discouraged from using these instructions.

Mnemonic	Description
B	Unconditional Branch
BAL	Branch and Link
BEQ	Branch on Equal
BGEZ	Branch on Greater Than or Equal to Zero
BGEZAL	Branch on Greater Than or Equal to Zero and Link
BGTZ	Branch on Greater Than Zero
BLEZ	Branch on Less Than or Equal to Zero
BLTZ	Branch on Less Than Zero
BLTZAL	Branch on Less Than Zero and Link
BNE	Branch on Not Equal
BEQL	Branch on Equal Likely
BGEZALL	Branch on Greater Than or Equal to Zero and Link Likely
BGEZL	Branch on Greater Than or Equal to Zero Likely
BGTZL	Branch on Greater Than Zero Likely
BLEZL	Branch on Less Than or Equal to Zero Likely
BLTZALL	Branch on Less Than Zero and Link Likely
BLTZL	Branch on Less Than Zero Likely
BNEL	Branch on Not Equal Likely

Jump instructions[edit]

Mnemonic	Description
J	Jump
JAL	Jump and Link
JALR	Jump and Link Register
JALR.HB	Jump and Link Register with Hazard Barrier
JALX	Jump and Link Exchange
JR	Jump Register
JR.HB	Jump Register with Hazard Barrier

Control instructions[edit]

Mnemonic	Description
EHB	Execution Hazard Barrier
NOP	No Operation
PAUSE	Wait for LLBit to Clear
SSNOP	Superscalar No Operation

Memory control instructions[edit]

Mnemonic	Description
LB	Load Byte
LBE	Load Byte EVA
LBU	Load Byte Unsigned
LBUE	Load Byte Unsigned EVA
LH	Load Halfword
LHE	Load Halfword EVA
LHU	Load Halfword Unsigned
LHUE	Load Halfword Unsigned EVA
LL	Load Linked Word
LLE	Load Linked Word-EVA
LW	Load Word
LWE	Load Word EVA
LWL	Load Word Left
LWLE	Load Word Left EVA
LWR	Load Word Right
LWRE	Load Word Right EVA
PREF	Prefetch
PREFE	Prefetch-EVA
SB	Store Byte
SBE	Store Byte EVA
SC	Store Conditional Word
SCE	Store Conditional Word EVA
SH	Store Halfword
SHE	Store Halfword EVA
SW	Store Word
SWE	Store Word EVA
SWL	Store Word Left
SWLE	Store Word Left EVA
SWR	Store Word Right
SWRE	Store Word Right EVA
SYNC	Synchronize Shared Memory
SYNCI	Synchronize Caches to Make Instruction Writes Effective

Logical instruction[edit]

Mnemonic	Description
AND	And
ANDI	And Immediate
LUI	Load Upper Immediate
NOR	Not Or
OR	Or
ORI	Or Immediate
XOR	Exclusive Or
XORI	Exclusive Or Immediate

Insert/Extract instructions[edit]

Mnemonic	Description
EXT	Extract Bit Field
INS	Insert Bit Field
WSBH	Word Swap Bytes Within Halfwords

Move instructions[edit]

Mnemonic	Description
MFHI	Move From HI Register
MFLO	Move From LO Register
MOVF	Move Conditional on Floating Point False
MOVN	Move Conditional on Not Zero
MOVT	Move Conditional on Floating Point True
MOVZ	Move Conditional on Zero
MTHI	Move To HI Register
MTLO	Move To LO Register
RDHWR	Read Hardware Register

Shift instructions[edit]

Mnemonic	Description
ROTR	Rotate Word Right
ROTRV	Rotate Word Right Variable
SLL	Shift Word Left Logical
SLLV	Shift Word Left Logical Variable
SRA	Shift Word Right Arithmetic
SRAV	Shift Word Right Arithmetic Variable
SRL	Shift Word Right Logical
SRLV	Shift Word Right Logical Variable

Trap instructions[edit]

Mnemonic	Description
BREAK	Breakpoint
SYSCALL	System Call
TEQ	Trap if Equal
TEQI	Trap if Equal Immediate
TGE	Trap if Greater or Equal
TGEI	Trap if Greater of Equal Immediate
TGEIU	Trap if Greater or Equal Immediate Unsigned
TGEU	Trap if Greater or Equal Unsigned
TLT	Trap if Less Than
TLTI	Trap if Less Than Immediate
TLTIU	Trap if Less Than Immediate Unsigned
TLTU	Trap if Less Than Unsigned
TNE	Trap if Not Equal
TNEI	Trap if Not Equal Immediate

FPU instructions[edit]

Arithmetic instructions[edit]

Mnemonic	Description
ABS.fmt	Floating Point Absolute Value
ADD.fmt	Floating Point Add
DIV.fmt	Floating Point Divide
MADD.fmt	Floating Point Multiply Add
MSUB.fmt	Floating Point Multiply Subtract
MUL.fmt	Floating Point Multiply
NEG.fmt	Floating Point Negate
NMADD.fmt	Floating Point Negative Multiply Add
NMSUB.fmt	Floating Point Negative Multiply Subtract
RECIP.fmt	Reciprocal Approximation
RSQRT.fmt	Reciprocal Square Root Approximation
SQRT.fmt	Floating Point Square Root
SUB.fmt	Floating Point Subtract

Branch instructions[edit]

Mnemonic	Description
BC1F	Branch on FP False
BC1T	Branch on FP True
BC1FL	Branch on FP False Likely
BC1TL	Branch on FP True Likely

Compare instructions[edit]

Mnemonic	Description
C.cond.fmt	Floating Point Compare

Convert instructions[edit]

Mnemonic	Description
ALNV.PS	Floating Point Align Variable
CEIL.L.fmt	Floating Point Ceiling Convert to Long Fixed Point
CEIL.W.fmt	Floating Point Ceiling Convert to Word Fixed Point
CVT.D.fmt	Floating Point Convert to Double Floating Point
CVT.L.fmt	Floating Point Convert to Long Fixed Point
CVT.PS.S	Floating Point Convert Pair to Paired Single
CVT.S.PL	Floating Point Convert Pair Lower to Single Floating Point
CVT.S.PU	Floating Point Convert Pair Upper to Single Floating Point
CVT.S.fmt	Floating Point Convert to Single Floating Point
CVT.W.fmt	Floating Point Convert to Word Fixed Point
FLOOR.L.fmt	Floating Point Floor Convert to Long Fixed Point
FLOOR.W.fmt	Floating Point Floor Convert to Word Fixed Point
PLL.PS	Pair Lower Lower
PLU.PS	Pair Lower Upper
PUL.PS	Pair Upper Lower
PUU.PS	Pair Upper Upper
ROUND.L.fmt	Floating Point Round to Long Fixed Point
ROUND.W.fmt	Floating Point Round to Word Fixed Point
TRUNC.L.fmt	Floating Point Truncate to Long Fixed Point
TRUNC.W.fmt	Floating Point Truncate to Word Fixed Point

Memory control instructions[edit]

Mnemonic	Description
LDC1	Load Doubleword to Floating Point
LDXC1	Load Doubleword Indexed to Floating Point
LUXC1	Load Doubleword Indexed Unaligned to Floating Point
LWC1	Load Word to Floating Point
LWXC1	Load Word Indexed to Floating Point
PREFX	Prefetch Indexed
SDC1	Store Doubleword from Floating Point
SDXC1	Store Doubleword Indexed from Floating Point
SUXC1	Store Doubleword Indexed Unaligned from Floating Point
SWC1	Store Word from Floating Point
SWXC1	Store Word Indexed from Floating Point

Move instructions[edit]

Mnemonic	Description
CFC1	Move Control Word from Floating Point
CTC1	Move Control Word to Floating Point
MFC1	Move Word from Floating Point
MFHC1	Move Word from High Half of Floating Point Register
MOV.fmt	Floating Point Move
MOVF.fmt	Floating Point Move Conditional on Floating Point False
MOVN.fmt	Floating Point Move Conditional on Not Zero
MOVT.fmt	Floating Point Move Conditional on Floating Point True
MOVZ.fmt	Floating Point Move Conditional on Zero
MTC1	Move Word to Floating Point
MTHC1	Move Word to High Half of Floating Point Register

Coprocessor instructions[edit]

Branch instructions[edit]

Mnemonic	Description
BC2F	Branch on COP2 False
BC2T	Branch on COP2 True
BC2FL	Branch on COP2 False Likely
BC2TL	Branch on COP2 True Likely

Execute instructions[edit]

Mnemonic	Description
COP2	Coprocessor Operation to Coprocessor 2

Memory control instructions[edit]

Mnemonic	Description
DC2	Load Doubleword to Coprocessor 2
LWC2	Load Word to Coprocessor 2
SDC2	Store Doubleword from Coprocessor 2
SWC2	Store Word from Coprocessor 2

Move instructions[edit]

Mnemonic	Description
CFC2	Move Control Word from Coprocessor 2
CTC2	Move Control Word to Coprocessor 2
MFC2	Move Word from Coprocessor 2
MFHC2	Move Word from High Half of Coprocessor 2 Register
MTC2	Move Word to Coprocessor 2
MTHC2	Move Word to High Half of Coprocessor 2 Register

Privileged instructions[edit]

Mnemonic	Description
CACHE	Perform Cache Operation
CACHEE	Perform Cache Operation EVA
DI	Disable Interrupts
EI	Enable Interrupts
ERET	Exception Return
MFC0	Move from Coprocessor 0
MTC0	Move to Coprocessor 0
RDPGPR	Read GPR from Previous Shadow Set
TLBP	Probe TLB for Matching Entry
TLBR	Read Indexed TLB Entry
TLBWI	Write Indexed TLB Entry
TLBWR	Write Random TLB Entry
WAIT	Enter Standby Mode
WRPGPR	Write GPR to Previous Shadow Set

EJTAG instructions[edit]

Mnemonic	Description
DERET	Debug Exception Return
SDBBP	Software Debug Breakpoint

References[edit]