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comparison src/cpu/sparc/vm/registerMap_sparc.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1998-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // machine-dependent implemention for register maps
26 friend class frame;
27
28 private:
29 intptr_t* _window; // register window save area (for L and I regs)
30 intptr_t* _younger_window; // previous save area (for O regs, if needed)
31
32 address pd_location(VMReg reg) const;
33 void pd_clear();
34 void pd_initialize_from(const RegisterMap* map) {
35 _window = map->_window;
36 _younger_window = map->_younger_window;
37 _location_valid[0] = 0; // avoid the shift_individual_registers game
38 }
39 void pd_initialize() {
40 _window = NULL;
41 _younger_window = NULL;
42 _location_valid[0] = 0; // avoid the shift_individual_registers game
43 }
44 void shift_window(intptr_t* sp, intptr_t* younger_sp) {
45 _window = sp;
46 _younger_window = younger_sp;
47 // Throw away locations for %i, %o, and %l registers:
48 // But do not throw away %g register locs.
49 if (_location_valid[0] != 0) shift_individual_registers();
50 }
51 void shift_individual_registers();
52 // When popping out of compiled frames, we make all IRegs disappear.
53 void make_integer_regs_unsaved() { _location_valid[0] = 0; }