Mips Instructions Set Pdf Adobe

Mips instructions set pdf adobe

Mips instructions set pdf adobe

This is a description of the MIPS instruction set, their meanings, syntax, semantics, and bit encodings. The syntax given for each instruction refers to the assembly language syntax supported by the MIPS assembler.

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Hyphens in the encoding indicate "don't care" bits which are not considered when an instruction is being decoded. The manner in which the processor executes an instruction and advances its program counters is as follows:. This behavior is indicated in the instruction specifications below.

This function is defined as follows:.

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Note: ALL arithmetic immediate values are sign-extended. After that, they are handled as signed or unsigned 32 bit numbers, depending upon the instruction. The only difference between signed and unsigned instructions is that signed instructions can generate an overflow exception and unsigned instructions can not.

The instruction descriptions are given below:.

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Adds two registers and stores the result in a register. Adds a register and a sign-extended immediate value and stores the result in a register.

MIPS Instruction Set: Opcodes Reference Sheet

Bitwise ands two registers and stores the result in a register. Bitwise ands a register and an immediate value and stores the result in a register.

Branches if the two registers are equal. Branches if the register is greater than or equal to zero.

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Branches if the register is greater than zero. Branches if the register is less than or equal to zero.

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Branches if the register is less than zero. Branches if the two registers are not equal. Jumps to the calculated address.

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A byte is loaded into a register from the specified address. The immediate value is shifted left 16 bits and stored in the register.

ISA 2.2 MIPS Instruction Encodings

The lower 16 bits are zeroes. A word is loaded into a register from the specified address. The contents of register HI are moved to the specified register.

Mips instructions set pdf adobe

The contents of register LO are moved to the specified register. Performs no operation. Bitwise logical ors two registers and stores the result in a register.

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Bitwise ors a register and an immediate value and stores the result in a register. Shifts a register value left by the shift amount listed in the instruction and places the result in a third register.

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Zeroes are shifted in. Shifts a register value left by the value in a second register and places the result in a third register. It gets zero otherwise. Shifts a register value right by the shift amount shamt and places the value in the destination register.

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The sign bit is shifted in. Subtracts two registers and stores the result in a register. Generates a software interrupt. The syscall instruction is described in more detail on the System Calls page. Exclusive ors two registers and stores the result in a register. Bitwise exclusive ors a register and an immediate value and stores the result in a register.

Mips instructions set pdf adobe

Updated on September 10, The manner in which the processor executes an instruction and advances its program counters is as follows: execute the instruction at PC copy nPC to PC add 4 or the branch offset to nPC This behavior is indicated in the instruction specifications below.