RBIT

Reverse Bits reverses the bit order in a register.

313029282726252423222120191817161514131211109876543210
sf101101011000000000000RnRd

32-bit (sf == 0)

RBIT <Wd>, <Wn>

64-bit (sf == 1)

RBIT <Xd>, <Xn>

integer d = UInt(Rd); integer n = UInt(Rn); integer datasize = if sf == '1' then 64 else 32;

Assembler Symbols

<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.

Operation

bits(datasize) operand = X[n]; bits(datasize) result; for i = 0 to datasize-1 result<datasize-1-i> = operand<i>; X[d] = result;

Operational information

If PSTATE.DIT is 1:


Internal version only: isa v33.11seprel, AdvSIMD v29.05, pseudocode v2021-09_rel, sve v2021-09_rc3d ; Build timestamp: 2021-10-06T11:41

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