1 /* 2 * Copyright (c) 1997, 2006, 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 "incls/_precompiled.incl" 26 #include "incls/_regmask.cpp.incl" 27 28 #define RM_SIZE _RM_SIZE /* a constant private to the class RegMask */ 29 30 //-------------Non-zero bit search methods used by RegMask--------------------- 31 // Find lowest 1, or return 32 if empty 32 int find_lowest_bit( uint32 mask ) { 33 int n = 0; 34 if( (mask & 0xffff) == 0 ) { 35 mask >>= 16; 36 n += 16; 37 } 38 if( (mask & 0xff) == 0 ) { 39 mask >>= 8; 40 n += 8; 41 } 42 if( (mask & 0xf) == 0 ) { 43 mask >>= 4; 44 n += 4; 45 } 46 if( (mask & 0x3) == 0 ) { | 1 /* 2 * Copyright (c) 1997, 2010, 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 "opto/compile.hpp" 27 #include "opto/regmask.hpp" 28 #ifdef TARGET_ARCH_MODEL_x86_32 29 # include "adfiles/ad_x86_32.hpp" 30 #endif 31 #ifdef TARGET_ARCH_MODEL_x86_64 32 # include "adfiles/ad_x86_64.hpp" 33 #endif 34 #ifdef TARGET_ARCH_MODEL_sparc 35 # include "adfiles/ad_sparc.hpp" 36 #endif 37 #ifdef TARGET_ARCH_MODEL_zero 38 # include "adfiles/ad_zero.hpp" 39 #endif 40 41 #define RM_SIZE _RM_SIZE /* a constant private to the class RegMask */ 42 43 //-------------Non-zero bit search methods used by RegMask--------------------- 44 // Find lowest 1, or return 32 if empty 45 int find_lowest_bit( uint32 mask ) { 46 int n = 0; 47 if( (mask & 0xffff) == 0 ) { 48 mask >>= 16; 49 n += 16; 50 } 51 if( (mask & 0xff) == 0 ) { 52 mask >>= 8; 53 n += 8; 54 } 55 if( (mask & 0xf) == 0 ) { 56 mask >>= 4; 57 n += 4; 58 } 59 if( (mask & 0x3) == 0 ) { |