Index

MOVK

Move wide with keep moves an optionally-shifted 16-bit immediate value into a register, keeping other bits unchanged.

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 1 1 1 0 0 1 0 1 hw imm16 Rd
opc

32-bit (sf == 0 && hw == 0x)

MOVK <Wd>, #<imm>{, LSL #<shift>}

64-bit (sf == 1)

MOVK <Xd>, #<imm>{, LSL #<shift>}

if sf == '0' && hw<1> == '1' then UNDEFINED;

integer d = UInt(Rd);
constant integer datasize = 32 << UInt(sf);
constant integer pos = UInt(hw:'0000');

Assembler Symbols

<Wd>

Is the 32-bit name of the general-purpose destination register, encoded in the "Rd" field.
<Xd>

Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field.
<imm>

Is the 16-bit unsigned immediate, in the range 0 to 65535, encoded in the "imm16" field.
<shift>

For the 32-bit variant: is the amount by which to shift the immediate left, either 0 (the default) or 16, encoded in the "hw" field as <shift>/16.

For the 64-bit variant: is the amount by which to shift the immediate left, either 0 (the default), 16, 32 or 48, encoded in the "hw" field as <shift>/16.

Operation

bits(datasize) result;

result = X[d, datasize];
result<pos+15:pos> = imm16;
X[d, datasize] = result;

Operational information

If PSTATE.DIT is 1: