1 /* 2 * Copyright (c) 2014, 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 #ifndef SHARE_VM_OPTO_COUNTBITSNODE_HPP 26 #define SHARE_VM_OPTO_COUNTBITSNODE_HPP 27 28 #include "opto/node.hpp" 29 #include "opto/opcodes.hpp" 30 31 class PhaseTransform; 32 33 //---------- CountBitsNode ----------------------------------------------------- 34 class CountBitsNode : public Node { 35 public: 36 CountBitsNode(Node* in1) : Node(0, in1) {} 37 const Type* bottom_type() const { return TypeInt::INT; } 38 virtual uint ideal_reg() const { return Op_RegI; } 39 }; 40 41 //---------- CountLeadingZerosINode -------------------------------------------- 42 // Count leading zeros (0-bit count starting from MSB) of an integer. 43 class CountLeadingZerosINode : public CountBitsNode { 44 public: 45 CountLeadingZerosINode(Node* in1) : CountBitsNode(in1) {} 46 virtual int Opcode() const; 47 virtual const Type* Value(PhaseGVN* phase) const; 48 }; 49 50 //---------- CountLeadingZerosLNode -------------------------------------------- 51 // Count leading zeros (0-bit count starting from MSB) of a long. 52 class CountLeadingZerosLNode : public CountBitsNode { 53 public: 54 CountLeadingZerosLNode(Node* in1) : CountBitsNode(in1) {} 55 virtual int Opcode() const; 56 virtual const Type* Value(PhaseGVN* phase) const; 57 }; 58 59 //---------- CountTrailingZerosINode ------------------------------------------- 60 // Count trailing zeros (0-bit count starting from LSB) of an integer. 61 class CountTrailingZerosINode : public CountBitsNode { 62 public: 63 CountTrailingZerosINode(Node* in1) : CountBitsNode(in1) {} 64 virtual int Opcode() const; 65 virtual const Type* Value(PhaseGVN* phase) const; 66 }; 67 68 //---------- CountTrailingZerosLNode ------------------------------------------- 69 // Count trailing zeros (0-bit count starting from LSB) of a long. 70 class CountTrailingZerosLNode : public CountBitsNode { 71 public: 72 CountTrailingZerosLNode(Node* in1) : CountBitsNode(in1) {} 73 virtual int Opcode() const; 74 virtual const Type* Value(PhaseGVN* phase) const; 75 }; 76 77 //---------- PopCountINode ----------------------------------------------------- 78 // Population count (bit count) of an integer. 79 class PopCountINode : public CountBitsNode { 80 public: 81 PopCountINode(Node* in1) : CountBitsNode(in1) {} 82 virtual int Opcode() const; 83 }; 84 85 //---------- PopCountLNode ----------------------------------------------------- 86 // Population count (bit count) of a long. 87 class PopCountLNode : public CountBitsNode { 88 public: 89 PopCountLNode(Node* in1) : CountBitsNode(in1) {} 90 virtual int Opcode() const; 91 }; 92 93 94 #endif // SHARE_VM_OPTO_COUNTBITSNODE_HPP