2
* Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
3
* Copyright (c) 2021, Arm Limited. All rights reserved.
4
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6
* This code is free software; you can redistribute it and/or modify it
7
* under the terms of the GNU General Public License version 2 only, as
8
* published by the Free Software Foundation.
10
* This code is distributed in the hope that it will be useful, but WITHOUT
11
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13
* version 2 for more details (a copy is included in the LICENSE file that
14
* accompanied this code).
16
* You should have received a copy of the GNU General Public License version
17
* 2 along with this work; if not, write to the Free Software Foundation,
18
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21
* or visit www.oracle.com if you need additional information or have any
25
#include "precompiled.hpp"
26
#include "runtime/registerMap.hpp"
27
#include "vmreg_aarch64.inline.hpp"
29
address RegisterMap::pd_location(VMReg base_reg, int slot_idx) const {
30
if (base_reg->is_FloatRegister()) {
31
// Not all physical slots of an SVE register have corresponding
32
// VMRegs. However they are always saved to the stack in a
33
// contiguous region of memory so we can calculate the address of
34
// the upper slots by offsetting from the base address.
35
assert(base_reg->is_concrete(), "must pass base reg");
36
int base_reg_enc = (base_reg->value() - ConcreteRegisterImpl::max_gpr) /
37
FloatRegister::max_slots_per_register;
38
intptr_t offset_in_bytes = slot_idx * VMRegImpl::stack_slot_size;
39
address base_location = location(base_reg, nullptr);
40
if (base_location != nullptr) {
41
return base_location + offset_in_bytes;
46
return location(base_reg->next(slot_idx), nullptr);