Mercurial > hg > truffle
diff src/cpu/x86/vm/registerMap_x86.cpp @ 20970:a560c9b81f0f
Add suport for oops in vector registers at safepoints
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Tue, 14 Apr 2015 22:20:07 -0700 |
parents | |
children | 658db9861109 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/cpu/x86/vm/registerMap_x86.cpp Tue Apr 14 22:20:07 2015 -0700 @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015, 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 <runtime/registerMap.hpp> +#include "vmreg_x86.inline.hpp" + +address RegisterMap::pd_location(VMReg reg) const { + if (reg->is_XMMRegister()) { + int regBase = reg->value() - ConcreteRegisterImpl::max_fpr; + if (regBase % 4 == 0) { + // Reads of the low and high 16 byte parts should be handled by location itself + return NULL; + } + VMReg baseReg = as_XMMRegister(regBase >> 3)->as_VMReg(); + intptr_t offset = (reg->value() - baseReg->value()) * 4; + if (offset >= 16) { + // The high part of YMM registers are saved in a their own area in the frame + baseReg = baseReg->next()->next()->next()->next(); + offset -= 16; + } + address baseLocation = location(baseReg); + if (baseLocation != NULL) { + return baseLocation + offset; + } + } + return NULL; +}