MIPS Technology: The 2026 Master Guide

In 2026 the computing environment is led by just handful of titans: x86 holds the desktop fortress ARM commands the mobile powerhouse while RISC V is the revolutionary power that is sweeping across the server and embedded worlds.

But it is still at the very foundations of all this stuck within the DNA of each current RISC processor appearing in the textbooks of each computer science scholar as well as chugging away in the routers that run the internet is MIPS.

Talking about MIPS in 2026 would be to discuss an unsolved issue. MIPS is the ISA (Instruction Set Architecture) is essentially an “dead” language for new high performance silicon. It was replaced by the open source revolution it influenced. But MIPS the company is still flourishing as subordinate of GlobalFoundries which is pivoting rapidly towards the development of high performance RISC V cores.

This is the ultimate guide to understanding MIPS. It doesnt matter if youre student wrestling to understand an Hennessy & Patterson textbook someone who manages network engineers legacy infrastructure or an historian who was historian of that “Silicon Graphics” era this is the history of the architecture that taught people around the globe the art of pipeline.

Table of Contents

Part I: The Genesis of RISC

The Stanford Philosophy

The early 1980s were when microprocessors began to become more complex. Intel as well as Motorola began adding additional instructions to their processors (CISC complex Instruction Set Computing) thinking that the hardware would perform the bulk lifting for the programmer.

While at Stanford University John L. Hennessy came up with an alternative concept. He realised that compilers couldnt make use of complex instructions effectively. They would rather use simple quick instructions that they could put together. The year was 1981. Hennessy headed project that designed an Microprocessor that did not have Interlocked Pipeline Stages (MIPS).

The premise was straightforward however it was radical “Simplicity enables speed.”

Uniformity: All instructions have of the same size (32 bit).
Storage Architecture for Load/Store: Just certain instructions are able to be accessed by memory. Everything else is done inside registers.1
The Pipeline The Pipeline: By dividing instructions into separate phases CPUs can perform different components of five distinct instructions simultaneously.2

The “Iron Law” of Performance

MIPS was born out of the mathematical reality sometimes referred to as”the Iron Law of Processor Performance:

$$\text = \frac \times \frac \times \frac$$

CISC architectures reduced the instruction number. MIPS reduced the CPI as well as Clock Cycle Time. In order to simplify instructions it allowed the speed of clocks to increase.

Part II: Inside the Machine (Technical Architecture)

This chapter explains the MIPS32 architecture which is which is considered to be the “lingua franca” of computer architecture education.

1. The Register File

MIPS doesnt hide its true state. It is able to display complete collection that includes 32 General Purpose registers (GPRs) with each one with width of 32 bits. Contrary to x86s confusing name conventions (EAX RX ESI) MIPS uses an numbering system ($0 $31) even though the names are conventional.

Register Number	Name	Usage	The “Golden Rules”
$0	$zero	Constant 0	Critical: Hardware connected to zero. It is not able to write anything. The results of reading it are always zero.
$2 $3	$v0 $v1	Values	Useful to retrieve values from functions.
$4 $7	$a0 $a3	Arguments	It is used to pass the initial four arguments of functions.
$8 $15	$t0 $t7	Temporaries	Caller saved. This can be overwritten with the call function.
$16 $23	$s0 $s7	Saved	Callee saved. Restored if event utilizes these.
$28	$gp	Global Pointer	A pointer to data that is static.
$29	$sp	Stack Pointer	The points are awarded to the top of the pile.
$31	$ra	Return Address	The address is held to go into after an operation call.

2. The Three Instruction Formats

One of MIPSs strengths is its rigor. Each instruction is precisely 32 bits wide. This is why the hardware decoder is exceptionally efficient.

R Format (Register)

This is utilized for logical and arithmetic operations (add sub or and or).

Opcode (6) | rs (5) | rt (5) | rd (5) | shamt (5) | funct (6)
Example: add $t0to the $s1 $s2 (Adds $s1 and $s2to the is stored the $t0 in).

I Format (Immediate)

Useful for data transfers and conditionals using constants.

Opcode (6) | rs (5) | rt (5) | Immediate (16)
Example: lw $t0 20($s1) (Load Word from Memory to address $s1 plus 20).
Examples: $t0 the label (Branch when the two are equal).

J Format (Jump)

It is used to jump over large distances.

Opcode (6) | Address (26)
Example: J Target

3. The Classic 5 Stage Pipeline

If youve been studying CS then youve probably memorized this drawing. Its the holy grail of the design of CPU.

If (Instruction Fetch) Take the instruction out of memory.3
ID (Instruction Decoder) ID (Instruction Decode): Look up registers and work out how you need to do.
EX (Execute) (Execute): The ALU (Arithmetic Logical Unit) processes the numbers or determines the memory addresses.
MEM (Memory) access to data memory (only to store or load data).
Write Back (Write Back) Writing the results back to the register file.

The Delay Slot Quirks:

The early MIPS chips (MIPS I) did not have the capability to shut down the pipeline when data wasnt in place. In order to fix this issue MIPS exposed the pipeline to the programmers through its Branch Delay Slot. When an instruction is executed immediately after the jump or branch will every time executed regardless of whether or not the branch has been used.

The modern context is that this is considered to be historic issue and is handled by compilers. However it is still key aspect in the ISA.

Part III: The Golden Era (1990 2000)

MIPS wasnt merely an academic endeavor For decade MIPS was the coolest computer on the planet.

Silicon Graphics (SGI)

If youve saw Jurassic Park (1993) or Terminator 2 you were watching MIPS working. SGI workstations powered by MIPS R3000 R4000 and R10000 chips established the 3D graphic business. These were the computers creators used to create contemporary CGI.

The Console Wars

MIPS was the engine that powered childhood for the generation of millennials.

Nintendo 64: Used 64 bit MIPS R4300i derivative. It introduced 3D gaming to all.
Sony PlayStation (PS1): Used MIPS R3000A.
Sony PlayStation 2: The Emotion Engine was an MIPS III core featuring enormous vector processors (VPU0/VPU1).
Sony PSP: MIPS R4000 based.

In the era of this MIPS was arguably more important to the culture in the era of MIPS than x86 as well as ARM. It was the basis of 3D gaming.

Part IV: The Business Rollercoaster (2000 2026)

The past of MIPS as an entity is an enthralling tale of pivots acquisitions as well as near death experience.

SGI Ownership (1992 1998):4 SGI bought MIPS to ensure their supply chain.5 It was gold cage SGI was focusing MIPS on top of the line workstations and did not have the embedded revolution ARM took over.
Spin offs and IPOs (1998 2013): MIPS Technologies was able to become independent once more. They saw success in WiFi routers (Broadcom Atheros) and set top boxes. If you own an older router between 2010 and 2020 the chances are it runs MIPS.
It was the Imagination Technologies Era (2013 2017): Imagination (makers of PowerVR GPUs) acquired MIPS.6 They tried pushing MIPS into Android tablets and phones to compete with ARM. The attempt failed.
The Tallwood and Wave Computing Disaster (2017 2020): MIPS was sold to Tallwood VC in the first place and then Wave Computing (an AI startup).7 Wave Computing misunderstood the market and closed down its “MIPS Open” initiative and then applied for Chapter 11 bankruptcy in 2020.
The Phoenix Rises (2021 2024): MIPS came out of bankruptcy changing its name to MIPS. The company made shocking announcement about their decision to end MIPS ISA. MIPS ISA.
Its the GlobalFoundries Era (2025 2026) as of the beginning of 2026 MIPS is now an integral component within the GlobalFoundries ecosystem (following strategic mergers and partnerships that took place in the late 2025).8 The company no longer distributes MIPS CPUs they now offer RISC V CPUs.

Part V: MIPS in 2026 The Great Pivot

It is the most important part for reader of today.

The Paradox: MIPS is now RISC V

In 2026 when you buy core license from MIPS the company that owns “MIPS” you are not receiving the architecture as described in the second part of this document. This is RISC V core.

Why? The battle for ecosystems was won. Android Linux and compilers that were optimized to work with ARM and x86 have left MIPS to fend for itself. In the meantime RISC V (which is basically “MIPS 2.0” open sourced) gained the respect of the market. MIPS is company which recognized their worth wasnt in their Instruction Set however it was their knowledge of microarchitectures their ability to create high performance pipelines as well as multi threaded processors.

The Product Line: eVocore

From 2026 onwards in 2026 the most popular MIPS products will be the eVocore (Evolved Core) series: 9

The eVocore P8700 is high performance superscalar out of order RISC V processor.10 It is the first processor to bring MIPSs legendary Simultaneous Multi Threading (SMT) technology to the RISC V world.11
eVocore I8500: reliable In Order Core for SoCs as well as automotive use.12

MIPS has been able to successfully reinvent it as the leading implementation of RISC V especially in the embedded automotive market and the high performance embedded market (e.g. Mobileye ADAS systems).

The “Zombie” MIPS: Loongson and China

As the US company changed direction towards different direction MIPS ISA remained in the same place. MIPS ISA found strange life in China. Loongson (DragonCore) has spent the last more than two decades developing high performance MIPS compatible chips to aid the Chinese government in order to decrease dependence on US technology (Intel).

Following lawsuits filed against the MIPS licensing companies (CIP United) Loongson transitioned to LoongArch at the beginning of 2020s.13 In 2026 LoongArch is the most popular national architecture that is dominant domestic architecture in China. Technically it is not MIPS however its spiritually 95 100 percent identical and carrying the torch of concept of design even though the binary encoder has been changed to protect against the patent being infringed.

Part VI: Why Learn MIPS in 2026?

If business uses RISC V while the rest of the market uses ARM and ARM then why will the universities of 2026 offer MIPS?

The Pedagogical Perfection: x86 is bloated heap of obsolete extensions. ARM is bit more complex thanks to its modes and conditional execution. The RISC V language is fantastic however MIPS is the most pure instance of the “standard” 5 stage pipeline. Its the best “teaching language” for hardware.
Older Infrastructures: This globe is filled with MIPS. Broadband gateways as well as fiber optic ONTs as well as industrial controllers that were installed between the year 2010 and 2020 are expected to remain operational until 2030. Engineers are required to update the software (mostly using OpenWrt/Linux).
“The “Latin” of Computing: As having basic understanding of Latin aids in understanding French and Spanish Knowing MIPS can help you comprehend the entire RISC architecture which followed.

The Final Verdict

In 2026 MIPS is “Ship of Theseus.” The name of the company is unchanged however the products name differs (RISC V). The first ISA has been discontinued but it still runs all the global networks as well as the brains of computing science students.

Pros of MIPS (ISA):

It is extremely elegant and easy to master.
Excellent compiler targets.
What is the definition for RISC.

Cons of MIPS (ISA):

The Branch Delay Slot: historic artifact which complicates the contemporary superscalar technology.
Ecosystem Death: The absence of the latest Android/Windows features.
Fractured History: The presence of too many proprietors (SGI Imagination Wave) created distrust within the industry.

MIPS was the architecture which was killed so that RISC V was able to live. It proved that small pipelined instruction set could beat the giants.

Even though MIPS ISA may not be the most powerful and MIPS ISA may not power your next device but the concepts laid out by Hennessy in 1981 remain constant. Every time you come across the RISC V chip or an ARM processor youre taking look at the kids of MIPS.