sb
Store byte
Stores the lowest 8 bits of $t1 at the address $t2 plus an offset.
Used in
- Arrays and stringsMIPS assembly
- syscall in the PlaygroundMIPS assembly
- Reverse a string in placeMIPS assembly
- Print a number in any base without helpMIPS assembly
- ChiptuneMIPS assembly
- Sampled soundMIPS assembly
Forms
sb , ()
Pseudo-instructions
The assembler turns these into one or more real instructions.
-
Write to label's address, reached through the %hi already in $t2
Store the low-order 8 bits of $t1 into the effective memory byte address
Operands
$t1- Any general-purpose register,
$0to$31, using its numeric or named spelling, such as$8or$t0($zerois$0;$rais$31). imm16- A signed 16-bit immediate,
-32768to32767. $t2- A general-purpose register. It may be the same register as
$t1. label- A named address in the program, such as the start of a loop or a variable in
.data. imm- An immediate value: a signed 16-bit value (
-32768to32767), an unsigned 16-bit value (0to65535) or a 32-bit value (-2147483648to4294967295). The assembler chooses a supported encoding for the value and other operands; a pseudoinstruction may expand into several instructions. imm32- A 32-bit immediate,
-2147483648to4294967295. Pseudoinstruction expansion may overwrite$at, losing its previous value.
The upper 24 bits of $t1 are ignored. Useful for writing single characters or packed byte arrays.
.data
.align 2
data: .byte 0
.text
# Write initialized value 0x12345678 with sb; inspect data bytes after the instruction: [0x78].
la $t1, data
li $t0, 0x12345678
sb $t0, 0($t1)