1/*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "opto/compile.hpp"
27#include "opto/node.hpp"
28#include "opto/optoreg.hpp"
29
30// processor dependent initialization for i486
31
32void Compile::pd_compiler2_init() {
33  guarantee(CodeEntryAlignment >= InteriorEntryAlignment, "" );
34  // QQQ presumably all 64bit cpu's support this. Seems like the ifdef could
35  // simply be left out.
36#ifndef AMD64
37  if (!VM_Version::supports_cmov()) {
38    ConditionalMoveLimit = 0;
39  }
40#endif // AMD64
41
42  if (UseAVX < 3) {
43    int delta = XMMRegisterImpl::max_slots_per_register * XMMRegisterImpl::number_of_registers;
44    int bottom = ConcreteRegisterImpl::max_fpr;
45    int top = bottom + delta;
46    int middle = bottom + (delta / 2);
47    int xmm_slots = XMMRegisterImpl::max_slots_per_register;
48    int lower = xmm_slots / 2;
49    // mark bad every register that we cannot get to if AVX less than 3, we have all slots in the array
50    // Note: vm2opto is allocated to ConcreteRegisterImpl::number_of_registers
51    for (int i = bottom; i < middle; i += xmm_slots) {
52      for (OptoReg::Name j = OptoReg::Name(i + lower); j<OptoReg::Name(i + xmm_slots); j = OptoReg::add(j, 1)) {
53        OptoReg::invalidate(j);
54      }
55    }
56    // mark the upper zmm bank bad and all the mask registers bad in this case
57    for (OptoReg::Name i = OptoReg::Name(middle); i<OptoReg::Name(_last_Mach_Reg - 1); i = OptoReg::add(i, 1)) {
58      OptoReg::invalidate(i);
59    }
60  }
61}
62