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UBFIZ
Unsigned Bitfield Insert in Zero.
This instruction is an alias of UBFM.
The equivalent instruction is UBFM .Wd, Wn, #(-lsb MOD 32), #(width-1)
Syntax
UBFIZ
Wd, Wn, #lsb, #width ; 32-bit
UBFIZ
Xd, Xn, #lsb, #width ; 64-bit
Where:
Wd- Is the 32-bit name of the general-purpose destination register.
Wn- Is the 32-bit name of the general-purpose source register.
lsb-
Depends on the instruction variant:
- 32-bit general registers
- Is the bit number of the lsb of the destination bitfield, in the range 0 to 31.
- 64-bit general registers
- Is the bit number of the lsb of the destination bitfield, in the range 0 to 63.
width-
Depends on the instruction variant:
- 32-bit general registers
- Is the width of the bitfield, in the range 1 to 32-
lsb. - 64-bit general registers
- Is the width of the bitfield, in the range 1 to 64-
lsb.
Xd- Is the 64-bit name of the general-purpose destination register.
Xn- Is the 64-bit name of the general-purpose source register.
Usage
Unsigned Bitfield Insert in Zero zeros the destination register and copies any number of contiguous bits from a source register into any position in the destination register.