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 #ifndef CPU_SPARC_VM_BYTES_SPARC_HPP 26 #define CPU_SPARC_VM_BYTES_SPARC_HPP 27 28 #include "memory/allocation.hpp" 29 30 class Bytes: AllStatic { 31 public: 32 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering 33 // Sparc needs to check for alignment. 34 35 // can I count on address always being a pointer to an unsigned char? Yes 36 37 // Thus, a swap between native and Java ordering is always a no-op: swap_u2(u2 x)38 static inline u2 swap_u2(u2 x) { return x; } swap_u4(u4 x)39 static inline u4 swap_u4(u4 x) { return x; } swap_u8(u8 x)40 static inline u8 swap_u8(u8 x) { return x; } 41 get_native_u2(address p)42 static inline u2 get_native_u2(address p){ 43 return (intptr_t(p) & 1) == 0 44 ? *(u2*)p 45 : ( u2(p[0]) << 8 ) 46 | ( u2(p[1]) ); 47 } 48 get_native_u4(address p)49 static inline u4 get_native_u4(address p) { 50 switch (intptr_t(p) & 3) { 51 case 0: return *(u4*)p; 52 53 case 2: return ( u4( ((u2*)p)[0] ) << 16 ) 54 | ( u4( ((u2*)p)[1] ) ); 55 56 default: return ( u4(p[0]) << 24 ) 57 | ( u4(p[1]) << 16 ) 58 | ( u4(p[2]) << 8 ) 59 | u4(p[3]); 60 } 61 } 62 get_native_u8(address p)63 static inline u8 get_native_u8(address p) { 64 switch (intptr_t(p) & 7) { 65 case 0: return *(u8*)p; 66 67 case 4: return ( u8( ((u4*)p)[0] ) << 32 ) 68 | ( u8( ((u4*)p)[1] ) ); 69 70 case 2: return ( u8( ((u2*)p)[0] ) << 48 ) 71 | ( u8( ((u2*)p)[1] ) << 32 ) 72 | ( u8( ((u2*)p)[2] ) << 16 ) 73 | ( u8( ((u2*)p)[3] ) ); 74 75 default: return ( u8(p[0]) << 56 ) 76 | ( u8(p[1]) << 48 ) 77 | ( u8(p[2]) << 40 ) 78 | ( u8(p[3]) << 32 ) 79 | ( u8(p[4]) << 24 ) 80 | ( u8(p[5]) << 16 ) 81 | ( u8(p[6]) << 8 ) 82 | u8(p[7]); 83 } 84 } 85 86 87 put_native_u2(address p,u2 x)88 static inline void put_native_u2(address p, u2 x) { 89 if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x; 90 else { 91 p[0] = x >> 8; 92 p[1] = x; 93 } 94 } 95 put_native_u4(address p,u4 x)96 static inline void put_native_u4(address p, u4 x) { 97 switch ( intptr_t(p) & 3 ) { 98 case 0: *(u4*)p = x; 99 break; 100 101 case 2: ((u2*)p)[0] = x >> 16; 102 ((u2*)p)[1] = x; 103 break; 104 105 default: ((u1*)p)[0] = x >> 24; 106 ((u1*)p)[1] = x >> 16; 107 ((u1*)p)[2] = x >> 8; 108 ((u1*)p)[3] = x; 109 break; 110 } 111 } 112 put_native_u8(address p,u8 x)113 static inline void put_native_u8(address p, u8 x) { 114 switch ( intptr_t(p) & 7 ) { 115 case 0: *(u8*)p = x; 116 break; 117 118 case 4: ((u4*)p)[0] = x >> 32; 119 ((u4*)p)[1] = x; 120 break; 121 122 case 2: ((u2*)p)[0] = x >> 48; 123 ((u2*)p)[1] = x >> 32; 124 ((u2*)p)[2] = x >> 16; 125 ((u2*)p)[3] = x; 126 break; 127 128 default: ((u1*)p)[0] = x >> 56; 129 ((u1*)p)[1] = x >> 48; 130 ((u1*)p)[2] = x >> 40; 131 ((u1*)p)[3] = x >> 32; 132 ((u1*)p)[4] = x >> 24; 133 ((u1*)p)[5] = x >> 16; 134 ((u1*)p)[6] = x >> 8; 135 ((u1*)p)[7] = x; 136 } 137 } 138 139 140 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering) 141 // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented) get_Java_u2(address p)142 static inline u2 get_Java_u2(address p) { return get_native_u2(p); } get_Java_u4(address p)143 static inline u4 get_Java_u4(address p) { return get_native_u4(p); } get_Java_u8(address p)144 static inline u8 get_Java_u8(address p) { return get_native_u8(p); } 145 put_Java_u2(address p,u2 x)146 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } put_Java_u4(address p,u4 x)147 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } put_Java_u8(address p,u8 x)148 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } 149 }; 150 151 //Reconciliation History 152 // 1.7 98/02/24 10:18:41 bytes_i486.hpp 153 // 1.10 98/04/08 18:47:57 bytes_i486.hpp 154 // 1.13 98/07/15 17:10:03 bytes_i486.hpp 155 // 1.14 98/08/13 10:38:23 bytes_i486.hpp 156 // 1.15 98/10/05 16:30:21 bytes_i486.hpp 157 // 1.17 99/06/22 16:37:35 bytes_i486.hpp 158 //End 159 160 #endif // CPU_SPARC_VM_BYTES_SPARC_HPP 161