Count Leading Zeros.
- is an optional condition code.
- is the destination register.
- is the operand register.
CLZ instruction counts the
number of leading zeros in the value in
returns the result in
result value is 32 if no bits are set in the source register, and
zero if bit 31 is set.
You cannot use PC for any operand.
You can use SP in these A32 instructions but this is deprecated.
You cannot use SP in T32 instructions.
This instruction does not change the flags.
This 32-bit instruction is available in A32 and T32.
There is no 16-bit version of this instruction in T32.
CLZ r4,r9 CLZNE r2,r3
CLZ T32 instruction followed by a left
Rm by the resulting
Rd value to normalize the value of register
MOV, to flag the case where
Rm is zero:
CLZ r5, r9 MOVS r9, r9, LSL r5