clz
Count leading zeros
Sets $t1 to the number of consecutive 0 bits in $t2, counted from the most-significant bit downward.
Used in
- Masks, shifts, popcount, and leading zeroesMIPS assembly
Forms
clz ,
Operands
$t1- Any general-purpose register,
$0to$31, using its numeric or named spelling, such as$8or$t0($zerois$0;$rais$31). $t2- A general-purpose register. It may be the same register as
$t1.
For example, if $t2 = 0b00010000..., then $t1 = 3. Returns 32 if $t2 is 0. Often used to compute floor(log2(n)) or to normalize values.
# Apply clz to initialized pattern 0x00F0FF00. Inspect $t2: 8.
li $t0, 0x00F0FF00
clz $t2, $t0