MOVK -- A64

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

integer d = UInt(Rd); integer datasize = if sf == '1' then 64 else 32; bits(16) imm = imm16; integer pos; MoveWideOp opcode; case opc of when '00' opcode = MoveWideOp_N; when '10' opcode = MoveWideOp_Z; when '11' opcode = MoveWideOp_K; otherwise UNDEFINED; if sf == '0' && hw<1> == '1' then UNDEFINED; 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; if opcode == MoveWideOp_K then result = X[d]; else result = Zeros(); result<pos+15:pos> = imm; if opcode == MoveWideOp_N then result = NOT(result); X[d] = result;

Operational information

If PSTATE.DIT is 1:

The execution time of this instruction is independent of:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.
The response of this instruction to asynchronous exceptions does not vary based on:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.

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

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

MOVK

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

64-bit (sf == 1)

Assembler Symbols

Operation

Operational information