Quelle c2_init_x86.cpp Sprache: C

/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/

#include "precompiled.hpp"
#include "opto/compile.hpp"
#include "opto/node.hpp"
#include "opto/optoreg.hpp"
#include "runtime/vm_version.hpp"

// processor dependent initialization for i486

extern void reg_mask_init();

void Compile::pd_compiler2_init() {
  guarantee(CodeEntryAlignment >= InteriorEntryAlignment, "" );
  // QQQ presumably all 64bit cpu's support this. Seems like the ifdef could
  // simply be left out.
#ifndef AMD64
  if (!VM_Version::supports_cmov()) {
    ConditionalMoveLimit = 0;
  }
#endif // AMD64

  if (UseAVX < 3) {
    int delta = XMMRegister::max_slots_per_register * XMMRegister::number_of_registers;
    int bottom = ConcreteRegisterImpl::max_fpr;
    int top = bottom + delta;
    int middle = bottom + (delta / 2);
    int xmm_slots = XMMRegister::max_slots_per_register;
    int lower = xmm_slots / 2;
    // mark bad every register that we cannot get to if AVX less than 3, we have all slots in the array
    // Note: vm2opto is allocated to ConcreteRegisterImpl::number_of_registers
    for (int i = bottom; i < middle; i += xmm_slots) {
      for (OptoReg::Name j = OptoReg::Name(i + lower); j<OptoReg::Name(i + xmm_slots); j = OptoReg::add(j, 1)) {
        OptoReg::invalidate(j);
      }
    }
    // mark the upper zmm bank bad and all the mask registers bad in this case
    for (OptoReg::Name i = OptoReg::Name(middle); i<OptoReg::Name(_last_Mach_Reg - 1); i = OptoReg::add(i, 1)) {
      OptoReg::invalidate(i);
    }
  }
  reg_mask_init();
}

quality93%

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.