jdk

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/*
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 * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "opto/compile.hpp"
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#include "opto/node.hpp"
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#include "opto/optoreg.hpp"
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#include "runtime/vm_version.hpp"
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// processor dependent initialization for i486
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extern void reg_mask_init();
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void Compile::pd_compiler2_init() {
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  guarantee(CodeEntryAlignment >= InteriorEntryAlignment, "" );
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  // QQQ presumably all 64bit cpu's support this. Seems like the ifdef could
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  // simply be left out.
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#ifndef AMD64
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  if (!VM_Version::supports_cmov()) {
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    ConditionalMoveLimit = 0;
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  }
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#endif // AMD64
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  if (UseAVX < 3) {
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    int delta = XMMRegister::max_slots_per_register * XMMRegister::number_of_registers;
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    int bottom = ConcreteRegisterImpl::max_fpr;
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    int top = bottom + delta;
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    int middle = bottom + (delta / 2);
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    int xmm_slots = XMMRegister::max_slots_per_register;
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    int lower = xmm_slots / 2;
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    // mark bad every register that we cannot get to if AVX less than 3, we have all slots in the array
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    // Note: vm2opto is allocated to ConcreteRegisterImpl::number_of_registers
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    for (int i = bottom; i < middle; i += xmm_slots) {
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      for (OptoReg::Name j = OptoReg::Name(i + lower); j<OptoReg::Name(i + xmm_slots); j = OptoReg::add(j, 1)) {
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        OptoReg::invalidate(j);
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      }
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    }
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    // mark the upper zmm bank bad and all the mask registers bad in this case
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    for (OptoReg::Name i = OptoReg::Name(middle); i<OptoReg::Name(_last_Mach_Reg - 1); i = OptoReg::add(i, 1)) {
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      OptoReg::invalidate(i);
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    }
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  }
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  reg_mask_init();
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}
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