1/*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26#ifndef CPU_S390_VM_C1_MACROASSEMBLER_S390_HPP
27#define CPU_S390_VM_C1_MACROASSEMBLER_S390_HPP
28
29  void pd_init() { /* nothing to do */ }
30
31 public:
32  void try_allocate(
33    Register obj,                      // result: Pointer to object after successful allocation.
34    Register var_size_in_bytes,        // Object size in bytes if unknown at compile time; invalid otherwise.
35    int      con_size_in_bytes,        // Object size in bytes if   known at compile time.
36    Register t1,                       // temp register
37    Label&   slow_case                 // Continuation point if fast allocation fails.
38  );
39
40  void initialize_header(Register obj, Register klass, Register len, Register Rzero, Register t1);
41  void initialize_body(Register objectFields, Register len_in_bytes, Register Rzero);
42
43  // locking
44  // hdr     : Used to hold locked markOop to be CASed into obj, contents destroyed.
45  // obj     : Must point to the object to lock, contents preserved.
46  // disp_hdr: Must point to the displaced header location, contents preserved.
47  // Returns code offset at which to add null check debug information.
48  void lock_object(Register hdr, Register obj, Register disp_hdr, Label& slow_case);
49
50  // unlocking
51  // hdr     : Used to hold original markOop to be CASed back into obj, contents destroyed.
52  // obj     : Must point to the object to lock, contents preserved.
53  // disp_hdr: Must point to the displaced header location, contents destroyed.
54  void unlock_object(Register hdr, Register obj, Register lock, Label& slow_case);
55
56  void initialize_object(
57    Register obj,                      // result: Pointer to object after successful allocation.
58    Register klass,                    // object klass
59    Register var_size_in_bytes,        // Object size in bytes if unknown at compile time; invalid otherwise.
60    int      con_size_in_bytes,        // Object size in bytes if   known at compile time.
61    Register t1,                       // temp register
62    Register t2                        // temp register
63  );
64
65  // Allocation of fixed-size objects.
66  // This can also be used to allocate fixed-size arrays, by setting
67  // hdr_size correctly and storing the array length afterwards.
68  void allocate_object(
69    Register obj,                      // result: Pointer to object after successful allocation.
70    Register t1,                       // temp register
71    Register t2,                       // temp register
72    int      hdr_size,                 // object header size in words
73    int      obj_size,                 // object size in words
74    Register klass,                    // object klass
75    Label&   slow_case                 // Continuation point if fast allocation fails.
76  );
77
78  enum {
79    max_array_allocation_length = 0x01000000 // Sparc friendly value, requires sethi only.
80  };
81
82  // Allocation of arrays.
83  void allocate_array(
84    Register obj,                      // result: Pointer to array after successful allocation.
85    Register len,                      // array length
86    Register t1,                       // temp register
87    Register t2,                       // temp register
88    int      hdr_size,                 // object header size in words
89    int      elt_size,                 // element size in bytes
90    Register klass,                    // object klass
91    Label&   slow_case                 // Continuation point if fast allocation fails.
92  );
93
94  // Invalidates registers in this window.
95  void invalidate_registers(Register preserve1 = noreg, Register preserve2 = noreg,
96                            Register preserve3 = noreg) PRODUCT_RETURN;
97
98  void nop() { z_nop(); }
99
100  // This platform only uses signal-based null checks. The Label is not needed.
101  void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); }
102
103#endif // CPU_S390_VM_C1_MACROASSEMBLER_S390_HPP
104