Signed Bitfield Insert in Zero zeroes the destination register and copies any number of contiguous bits from a source register into any position in the destination register, sign-extending the most significant bit of the transferred value.
This is an alias of SBFM. This means:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
sf | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | N | immr | imms | Rn | Rd | ||||||||||||||||||
opc |
SBFIZ <Wd>, <Wn>, #<lsb>, #<width>
is equivalent to
SBFM <Wd>, <Wn>, #(-<lsb> MOD 32), #(<width>-1)
and is the preferred disassembly when UInt(imms) < UInt(immr).
SBFIZ <Xd>, <Xn>, #<lsb>, #<width>
is equivalent to
SBFM <Xd>, <Xn>, #(-<lsb> MOD 64), #(<width>-1)
and is the preferred disassembly when UInt(imms) < UInt(immr).
<Wd> |
Is the 32-bit name of the general-purpose destination register, encoded in the "Rd" field. |
<Wn> |
Is the 32-bit name of the general-purpose source register, encoded in the "Rn" field. |
<Xd> |
Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field. |
<Xn> |
Is the 64-bit name of the general-purpose source register, encoded in the "Rn" field. |
<width> |
For the 32-bit variant: is the width of the bitfield, in the range 1 to 32-<lsb>. |
For the 64-bit variant: is the width of the bitfield, in the range 1 to 64-<lsb>. |
The description of SBFM gives the operational pseudocode for this instruction.
Internal version only: isa v25.07, AdvSIMD v23.0, pseudocode v31.3
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