mirror of
https://github.com/openjdk/jdk.git
synced 2026-04-01 18:50:17 +00:00
261 lines
7.9 KiB
C++
261 lines
7.9 KiB
C++
/*
|
|
* Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2012, 2022 SAP SE. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#ifndef CPU_PPC_BYTES_PPC_HPP
|
|
#define CPU_PPC_BYTES_PPC_HPP
|
|
|
|
#include "memory/allStatic.hpp"
|
|
#include "utilities/byteswap.hpp"
|
|
|
|
class Bytes: AllStatic {
|
|
public:
|
|
// Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering
|
|
// PowerPC needs to check for alignment.
|
|
|
|
// Can I count on address always being a pointer to an unsigned char? Yes.
|
|
|
|
#if defined(VM_LITTLE_ENDIAN)
|
|
|
|
static inline u2 get_native_u2(address p) {
|
|
return (intptr_t(p) & 1) == 0
|
|
? *(u2*)p
|
|
: ( u2(p[1]) << 8 )
|
|
| ( u2(p[0]) );
|
|
}
|
|
|
|
static inline u4 get_native_u4(address p) {
|
|
switch (intptr_t(p) & 3) {
|
|
case 0: return *(u4*)p;
|
|
|
|
case 2: return ( u4( ((u2*)p)[1] ) << 16 )
|
|
| ( u4( ((u2*)p)[0] ) );
|
|
|
|
default: return ( u4(p[3]) << 24 )
|
|
| ( u4(p[2]) << 16 )
|
|
| ( u4(p[1]) << 8 )
|
|
| u4(p[0]);
|
|
}
|
|
}
|
|
|
|
static inline u8 get_native_u8(address p) {
|
|
switch (intptr_t(p) & 7) {
|
|
case 0: return *(u8*)p;
|
|
|
|
case 4: return ( u8( ((u4*)p)[1] ) << 32 )
|
|
| ( u8( ((u4*)p)[0] ) );
|
|
|
|
case 2: return ( u8( ((u2*)p)[3] ) << 48 )
|
|
| ( u8( ((u2*)p)[2] ) << 32 )
|
|
| ( u8( ((u2*)p)[1] ) << 16 )
|
|
| ( u8( ((u2*)p)[0] ) );
|
|
|
|
default: return ( u8(p[7]) << 56 )
|
|
| ( u8(p[6]) << 48 )
|
|
| ( u8(p[5]) << 40 )
|
|
| ( u8(p[4]) << 32 )
|
|
| ( u8(p[3]) << 24 )
|
|
| ( u8(p[2]) << 16 )
|
|
| ( u8(p[1]) << 8 )
|
|
| u8(p[0]);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static inline void put_native_u2(address p, u2 x) {
|
|
if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x;
|
|
else {
|
|
p[1] = x >> 8;
|
|
p[0] = 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)[1] = x >> 16;
|
|
((u2*)p)[0] = x;
|
|
break;
|
|
|
|
default: ((u1*)p)[3] = x >> 24;
|
|
((u1*)p)[2] = x >> 16;
|
|
((u1*)p)[1] = x >> 8;
|
|
((u1*)p)[0] = 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)[1] = x >> 32;
|
|
((u4*)p)[0] = x;
|
|
break;
|
|
|
|
case 2: ((u2*)p)[3] = x >> 48;
|
|
((u2*)p)[2] = x >> 32;
|
|
((u2*)p)[1] = x >> 16;
|
|
((u2*)p)[0] = x;
|
|
break;
|
|
|
|
default: ((u1*)p)[7] = x >> 56;
|
|
((u1*)p)[6] = x >> 48;
|
|
((u1*)p)[5] = x >> 40;
|
|
((u1*)p)[4] = x >> 32;
|
|
((u1*)p)[3] = x >> 24;
|
|
((u1*)p)[2] = x >> 16;
|
|
((u1*)p)[1] = x >> 8;
|
|
((u1*)p)[0] = 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 Power CPUs are big-endian oriented).
|
|
static inline u2 get_Java_u2(address p) { return byteswap(get_native_u2(p)); }
|
|
static inline u4 get_Java_u4(address p) { return byteswap(get_native_u4(p)); }
|
|
static inline u8 get_Java_u8(address p) { return byteswap(get_native_u8(p)); }
|
|
|
|
static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, byteswap(x)); }
|
|
static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, byteswap(x)); }
|
|
static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, byteswap(x)); }
|
|
|
|
#else // !defined(VM_LITTLE_ENDIAN)
|
|
|
|
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 Power 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); }
|
|
|
|
#endif // VM_LITTLE_ENDIAN
|
|
};
|
|
|
|
#endif // CPU_PPC_BYTES_PPC_HPP
|