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 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 */ 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