1 /*
 2  * Copyright (c) 1998, 2025, 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 "asm/assembler.hpp"
26 #include "code/vmreg.hpp"
27 
28 // First VMReg value that could refer to a stack slot.  This is only
29 // used by SA and jvmti, but it's a leaky abstraction: SA and jvmti
30 // "know" that stack0 is an integer masquerading as a pointer. For the
31 // sake of those clients, we preserve this interface.
32 VMReg VMRegImpl::stack0 = (VMReg)(intptr_t)FIRST_STACK;
33 
34 // VMRegs are 4 bytes wide on all platforms
35 const int VMRegImpl::stack_slot_size = 4;
36 const int VMRegImpl::slots_per_word = wordSize / stack_slot_size;
37 
38 const int VMRegImpl::register_count = ConcreteRegisterImpl::number_of_registers;
39 // Register names
40 const char *VMRegImpl::regName[ConcreteRegisterImpl::number_of_registers];
41 
42 void VMRegImpl::print_on(outputStream* st) const {
43   if (is_reg()) {
44     assert(VMRegImpl::regName[value()], "VMRegImpl::regName[%d] returns nullptr", value());
45     st->print("%s",VMRegImpl::regName[value()]);
46   } else if (is_stack()) {
47     int stk = reg2stack();
48     st->print("[%d]", stk*4);
49   } else {
50     st->print("BAD!");
51   }
52 }
53 
54 VMRegImpl all_VMRegs[ConcreteRegisterImpl::number_of_registers + 1];
55 
56 void VMRegImpl::print() const { print_on(tty); }