1 /*
2 * Copyright (c) 1997, 2012, 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 "asm/assembler.hpp"
27 #include "asm/assembler.inline.hpp"
28
29 #include "assembler_sparc.hpp"
30
code_fill_byte()31 int AbstractAssembler::code_fill_byte() {
32 return 0x00; // illegal instruction 0x00000000
33 }
34
35 #ifdef VALIDATE_PIPELINE
36 /* Walk over the current code section and verify that there are no obvious
37 * pipeline hazards exposed in the code generated.
38 */
validate_no_pipeline_hazards()39 void Assembler::validate_no_pipeline_hazards() {
40 const CodeSection* csect = code_section();
41
42 address addr0 = csect->start();
43 address addrN = csect->end();
44 uint32_t prev = 0;
45
46 assert((addrN - addr0) % BytesPerInstWord == 0, "must be");
47
48 for (address pc = addr0; pc != addrN; pc += BytesPerInstWord) {
49 uint32_t insn = *reinterpret_cast<uint32_t*>(pc);
50
51 // 1. General case: No CTI immediately after other CTI
52 assert(!(is_cti(prev) && is_cti(insn)), "CTI-CTI not allowed.");
53
54 // 2. Special case: No CTI immediately after/before RDPC
55 assert(!(is_cti(prev) && is_rdpc(insn)), "CTI-RDPC not allowed.");
56 assert(!(is_rdpc(prev) && is_cti(insn)), "RDPC-CTI not allowed.");
57
58 prev = insn;
59 }
60 }
61 #endif
62