LDR (literal)
Load register (literal)
This instruction calculates an address from the PC value and
an immediate offset, loads a word from memory, and writes it to a
register. For information about addressing modes, see
Load/Store addressing modes.
If PSTATE.DIT is 1, the timing of this instruction is insensitive to the value of the data being loaded or stored.
0
x
0
1
1
0
0
0
0
LDR <Wt>, <label>
1
LDR <Xt>, <label>
constant integer t = UInt(Rt);
constant integer size = 4 << UInt(opc<0>);
constant boolean nontemporal = FALSE;
constant boolean tagchecked = FALSE;
constant bits(64) offset = SignExtend(imm19:'00', 64);
<Wt>
Is the 32-bit name of the general-purpose register to be loaded, encoded in the "Rt" field.
<label>
Is the program label from which the data is to be loaded. Its offset from the address of this instruction, in the range +/-1MB, is encoded as "imm19" times 4.
<Xt>
Is the 64-bit name of the general-purpose register to be loaded, encoded in the "Rt" field.
constant bits(64) address = PC64 + offset;
constant boolean privileged = PSTATE.EL != EL0;
constant AccessDescriptor accdesc = CreateAccDescGPR(MemOp_LOAD, nontemporal, privileged,
tagchecked);
X[t, size * 8] = Mem[address, size, accdesc];