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/* Change argument to number of bits rather than bytes
(also, move constraint as size may be undefined...) */
val aarch64_memory_literal_general : forall ('size : Int).
(MemOp, bits(64), bool, atom('size), int) -> unit effect {escape, undef, wreg, rreg, rmem, wmem}
function aarch64_memory_literal_general (memop, offset, signed, size, t) = {
address : bits(64) = aget_PC() + offset;
data : bits('size) = undefined;
match memop {
MemOp_LOAD => {
assert(constraint('size >= 0));
let 'bytes = size / 8;
assert(constraint(8 * 'bytes = 'size));
data = aget_Mem(address, bytes, AccType_NORMAL);
if signed then aset_X(t, SignExtend(data, 64)) else aset_X(t, data)
},
MemOp_PREFETCH => Prefetch(address, __GetSlice_int(5, t, 0))
}
}
val memory_literal_general_decode : (bits(2), bits(1), bits(19), bits(5)) -> unit effect {escape, rmem, rreg, undef, wmem, wreg}
function memory_literal_general_decode (opc, V, imm19, Rt) = {
__unconditional = true;
t : int = UInt(Rt);
memop : MemOp = MemOp_LOAD;
signed : bool = false;
size : int = undefined;
offset : bits(64) = undefined;
match opc {
0b00 => size = 4,
0b01 => size = 8,
0b10 => {
size = 4;
signed = true
},
0b11 => memop = MemOp_PREFETCH
};
offset = SignExtend(imm19 @ 0b00, 64);
aarch64_memory_literal_general(memop, offset, signed, 8 * size, t)
}
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