1 /* 2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2007 Red Hat, Inc. 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_ZERO_REGISTER_ZERO_HPP 27 #define CPU_ZERO_REGISTER_ZERO_HPP 28 29 #include "asm/register.hpp" 30 #include "runtime/vm_version.hpp" 31 32 class VMRegImpl; 33 typedef VMRegImpl* VMReg; 34 35 // Use Register as shortcut 36 class RegisterImpl; 37 typedef RegisterImpl* Register; 38 39 inline Register as_Register(int encoding) { 40 return (Register)(intptr_t) encoding; 41 } 42 43 // The implementation of integer registers for the zero architecture 44 class RegisterImpl : public AbstractRegisterImpl { 45 public: 46 enum { 47 number_of_registers = 0 48 }; 49 50 // construction 51 inline friend Register as_Register(int encoding); 52 VMReg as_VMReg(); 53 54 // derived registers, offsets, and addresses 55 Register successor() const { 56 return as_Register(encoding() + 1); 57 } 58 59 // accessors 60 int encoding() const { 61 assert(is_valid(), "invalid register"); 62 return (intptr_t)this; 63 } 64 bool is_valid() const { 65 return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers; 66 } 67 const char* name() const; 68 }; 69 70 // Use FloatRegister as shortcut 71 class FloatRegisterImpl; 72 typedef FloatRegisterImpl* FloatRegister; 73 74 inline FloatRegister as_FloatRegister(int encoding) { 75 return (FloatRegister)(intptr_t) encoding; 76 } 77 78 // The implementation of floating point registers for the zero architecture 79 class FloatRegisterImpl : public AbstractRegisterImpl { 80 public: 81 enum { 82 number_of_registers = 0 83 }; 84 85 // construction 86 inline friend FloatRegister as_FloatRegister(int encoding); 87 VMReg as_VMReg(); 88 89 // derived registers, offsets, and addresses 90 FloatRegister successor() const { 91 return as_FloatRegister(encoding() + 1); 92 } 93 94 // accessors 95 int encoding() const { 96 assert(is_valid(), "invalid register"); 97 return (intptr_t)this; 98 } 99 bool is_valid() const { 100 return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers; 101 } 102 const char* name() const; 103 }; 104 105 class ConcreteRegisterImpl : public AbstractRegisterImpl { 106 public: 107 enum { 108 number_of_registers = RegisterImpl::number_of_registers + 109 FloatRegisterImpl::number_of_registers 110 }; 111 112 static const int max_gpr; 113 static const int max_fpr; 114 }; 115 116 CONSTANT_REGISTER_DECLARATION(Register, noreg, (-1)); 117 #ifndef DONT_USE_REGISTER_DEFINES 118 #define noreg ((Register)(noreg_RegisterEnumValue)) 119 #endif 120 121 #endif // CPU_ZERO_REGISTER_ZERO_HPP