1 /* 2 * Copyright (c) 2015, 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 "runtime/registerMap.hpp" 27 #include "vmreg_x86.inline.hpp" 28 29 address RegisterMap::pd_location(VMReg reg) const { 30 if (reg->is_XMMRegister()) { 31 int regBase = reg->value() - ConcreteRegisterImpl::max_fpr; 32 if (regBase % 4 == 0) { 33 // Reads of the low and high 16 byte parts should be handled by location itself 34 // because they have separate callee saved entries. 35 // See RegisterSaver::save_live_registers(). 36 return NULL; 37 } 38 VMReg baseReg = as_XMMRegister(regBase / XMMRegisterImpl::max_slots_per_register)->as_VMReg(); 39 intptr_t offset = (reg->value() - baseReg->value()) * VMRegImpl::stack_slot_size; // offset in bytes 40 if (offset >= 16) { 41 // The high part of YMM registers are saved in a their own area in the frame 42 baseReg = baseReg->next()->next()->next()->next(); 43 offset -= 16; 44 } 45 address baseLocation = location(baseReg); 46 if (baseLocation != NULL) { 47 return baseLocation + offset; 48 } 49 } 50 return NULL; 51 }