Load linked : Identical to 'lw' in this simulator (reads 32 bits from memory into $t1). In real multi-processor hardware, 'll' is the first half of an atomic read-modify-write pair with 'sc' (store conditional), allowing lock-free synchronization.
ll
Operands
$reg, [imm($reg) / ($reg) / imm / id / id($reg) / id+imm / id+imm($reg)]Variants
- Load linked : Identical to 'lw' in this simulator (reads 32 bits from memory into $t1). In real multi-processor hardware, 'll' is the first half of an atomic read-modify-write pair with 'sc' (store conditional), allowing lock-free synchronization. ll $t1,-100($t2)
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,($t2)
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,-100
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,100
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,100000
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,100($t2)
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,100000($t2)
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,label
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,label($t2)
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,label+100000
- Load Linked : Paired with Store Conditional (sc) to perform atomic read-modify-write. Treated as equivalent to Load Word (lw) because MARS does not simulate multiple processors. ll $t1,label+100000($t2)
.data
.align 2
data: .word 0x12345678, 0
.text
# Load initialized bytes; inspect $t0: 0x12345678.
la $t1, data
ll $t0, 0($t1)