b  label     ==     beq  $0,$0,offset

Table of Branch Instructions

Here is a table of branch instructions. There are additional branch instructions used for subroutine linkage that have been omitted. Some instructions assume 32-bit two's complement data; others assume 32-bit unsigned data. Some instructions don't assume any data format.

The first operand s must be a register. The second operand t may be a register or a immediate operand (the extended assembler will generate the correct basic instructions depending on which you choose). The label designates address that can be reached with by adding a 16-bit, sign-extended integer to the PC. This means it must be roughly plus or minus 32K from the current instruction.

Mnemonic	Operands	Description	signed or unsigned?
b	label	branch
beq	s,t,label	branch if s==t
beqz	s,label	branch if s==0
bge	s,t,label	branch if s>=t	signed
bgeu	s,t,label	branch if s>=t	unsigned
bgez	s,label	branch if s>=0	signed
bgt	s,t,label	branch if s>t	signed
bgtu	s,t,label	branch if s>t	unsigned
bgtz	s,label	branch if s>0	signed
ble	s,t,label	branch if s<=t	signed
bleu	s,t,label	branch if s<=t	unsigned
blez	s,label	branch if s<=0	signed
blt	s,t,label	branch if s<t	signed
bltu	s,t,label	branch if s<t	unsigned
bltz	s,label	branch if s<0	signed
bne	s,t,label	branch if s=/=t
bnez	s,label	branch if s=/=0

Some of the pseudoinstructions use the assembler temporary register ($at, or register $1) in the one or two basic instructions they are expanded to.