Mercurial > hg > truffle
diff src/cpu/sparc/vm/bytes_sparc.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/cpu/sparc/vm/bytes_sparc.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,157 @@ +/* + * Copyright 1997-2002 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +class Bytes: AllStatic { + public: + // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering + // Sparc needs to check for alignment. + + // can I count on address always being a pointer to an unsigned char? Yes + + // Returns true, if the byte ordering used by Java is different from the nativ byte ordering + // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc. + static inline bool is_Java_byte_ordering_different() { return false; } + + // Thus, a swap between native and Java ordering is always a no-op: + static inline u2 swap_u2(u2 x) { return x; } + static inline u4 swap_u4(u4 x) { return x; } + static inline u8 swap_u8(u8 x) { return x; } + + static inline u2 get_native_u2(address p){ + return (intptr_t(p) & 1) == 0 + ? *(u2*)p + : ( u2(p[0]) << 8 ) + | ( u2(p[1]) ); + } + + static inline u4 get_native_u4(address p) { + switch (intptr_t(p) & 3) { + case 0: return *(u4*)p; + + case 2: return ( u4( ((u2*)p)[0] ) << 16 ) + | ( u4( ((u2*)p)[1] ) ); + + default: return ( u4(p[0]) << 24 ) + | ( u4(p[1]) << 16 ) + | ( u4(p[2]) << 8 ) + | u4(p[3]); + } + } + + static inline u8 get_native_u8(address p) { + switch (intptr_t(p) & 7) { + case 0: return *(u8*)p; + + case 4: return ( u8( ((u4*)p)[0] ) << 32 ) + | ( u8( ((u4*)p)[1] ) ); + + case 2: return ( u8( ((u2*)p)[0] ) << 48 ) + | ( u8( ((u2*)p)[1] ) << 32 ) + | ( u8( ((u2*)p)[2] ) << 16 ) + | ( u8( ((u2*)p)[3] ) ); + + default: return ( u8(p[0]) << 56 ) + | ( u8(p[1]) << 48 ) + | ( u8(p[2]) << 40 ) + | ( u8(p[3]) << 32 ) + | ( u8(p[4]) << 24 ) + | ( u8(p[5]) << 16 ) + | ( u8(p[6]) << 8 ) + | u8(p[7]); + } + } + + + + static inline void put_native_u2(address p, u2 x) { + if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x; + else { + p[0] = x >> 8; + p[1] = x; + } + } + + static inline void put_native_u4(address p, u4 x) { + switch ( intptr_t(p) & 3 ) { + case 0: *(u4*)p = x; + break; + + case 2: ((u2*)p)[0] = x >> 16; + ((u2*)p)[1] = x; + break; + + default: ((u1*)p)[0] = x >> 24; + ((u1*)p)[1] = x >> 16; + ((u1*)p)[2] = x >> 8; + ((u1*)p)[3] = x; + break; + } + } + + static inline void put_native_u8(address p, u8 x) { + switch ( intptr_t(p) & 7 ) { + case 0: *(u8*)p = x; + break; + + case 4: ((u4*)p)[0] = x >> 32; + ((u4*)p)[1] = x; + break; + + case 2: ((u2*)p)[0] = x >> 48; + ((u2*)p)[1] = x >> 32; + ((u2*)p)[2] = x >> 16; + ((u2*)p)[3] = x; + break; + + default: ((u1*)p)[0] = x >> 56; + ((u1*)p)[1] = x >> 48; + ((u1*)p)[2] = x >> 40; + ((u1*)p)[3] = x >> 32; + ((u1*)p)[4] = x >> 24; + ((u1*)p)[5] = x >> 16; + ((u1*)p)[6] = x >> 8; + ((u1*)p)[7] = x; + } + } + + + // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering) + // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented) + static inline u2 get_Java_u2(address p) { return get_native_u2(p); } + static inline u4 get_Java_u4(address p) { return get_native_u4(p); } + static inline u8 get_Java_u8(address p) { return get_native_u8(p); } + + static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } + static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } + static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } +}; + +//Reconciliation History +// 1.7 98/02/24 10:18:41 bytes_i486.hpp +// 1.10 98/04/08 18:47:57 bytes_i486.hpp +// 1.13 98/07/15 17:10:03 bytes_i486.hpp +// 1.14 98/08/13 10:38:23 bytes_i486.hpp +// 1.15 98/10/05 16:30:21 bytes_i486.hpp +// 1.17 99/06/22 16:37:35 bytes_i486.hpp +//End