Instruction set

The MIPS32 instruction set can be broadly divided into the following categories:

Category	Description
Data processing	Instructions that perform arithmetic and logical operations on data stored in registers or memory
Control flow	Instructions that allow the processor to change the flow of execution in a program
Memory access	Instructions that allow the processor to read from and write to memory
Floating point	Instructions that support the use of floating point numbers in programs
Multimedia	Instructions that are optimized for processing multimedia data, such as audio and video

Overall, the MIPS32 instruction set includes a wide range of instructions designed to support a variety of different types of applications and workloads.

Data processing

Instruction	Description
add	Add two values and store the result in a register
sub	Subtract one value from another and store the result in a register
mul	Multiply two values and store the result in a register
div	Divide one value by another and store the result in a register
and	Perform a bitwise AND operation on two values and store the result in a register
or	Perform a bitwise OR operation on two values and store the result in a register
xor	Perform a bitwise XOR operation on two values and store the result in a register
nor	Perform a bitwise NOR operation on two values and store the result in a register

These instructions allow the processor to perform various types of arithmetic and logical operations on data stored in registers or memory. They are a fundamental part of the MIPS32 instruction set and are used extensively in many types of programs.

Control flow

Instruction	Description
j	Jump to a new address in the program
jal	Jump to a new address and store the return address in a register
beq	Branch to a new address if two values are equal
bne	Branch to a new address if two values are not equal
syscall	Trigger a system call or exception

These instructions allow the processor to change the flow of execution in a program. They can be used to implement branching, looping, and other control structures, as well as to handle exceptions and interrupts. They are an important part of the MIPS32 instruction set and are used extensively in many types of programs.

Memory access

Instruction	Description
lw	Load a word (4 bytes) from memory into a register
sw	Store a word (4 bytes) from a register to memory
lb	Load a byte from memory into a register
sb	Store a byte from a register to memory

These instructions allow the processor to read from and write to memory. They are used to load data from memory into registers for processing, and to store the results of processing back to memory. They are an important part of the MIPS32 instruction set and are used extensively in many types of programs.

Floating point

Instruction	Description
add.s	Add two floating point values and store the result in a register
sub.s	Subtract one floating point value from another and store the result in a register
mul.s	Multiply two floating point values and store the result in a register
div.s	Divide one floating point value by another and store the result in a register
cvt.s.w	Convert an integer value to a floating point value and store the result in a register
cvt.w.s	Convert a floating point value to an integer value and store the result in a register

These instructions allow the processor to perform various types of arithmetic operations on floating point numbers, as well as to convert between floating point and integer formats. They are an important part of the MIPS32 instruction set and are used extensively in many types of programs that require the use of floating point numbers.

Multimedia

Instruction	Description
pack.b	Pack 8-bit integers into a single register
unpack.b	Unpack 8-bit integers from a single register
add.p	Perform an addition operation on packed data
mul.p	Perform a multiplication operation on packed data

These instructions are optimized for processing multimedia data, such as audio and video. They allow the processor to perform operations on packed data (e.g. packed 8-bit integers) and to perform SIMD (Single Instruction, Multiple Data) operations. They are an important part of the MIPS32 instruction set and are used extensively in many types of programs that require efficient processing of multimedia data.

Resources

Imagination's MIPS32 architectureMIPS