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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.