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/*
* Copyright (c) 2008, 2022, Oracle and/or its affiliates. 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_ARM_BYTES_ARM_HPP
#define CPU_ARM_BYTES_ARM_HPP
#include "memory/allStatic.hpp"
#include "utilities/macros.hpp"
#ifndef VM_LITTLE_ENDIAN
#define VM_LITTLE_ENDIAN 1
#endif
class Bytes: AllStatic {
public:
static inline u2 get_Java_u2(address p) {
return (u2(p[0]) << 8) | u2(p[1]);
}
static inline u4 get_Java_u4(address p) {
return u4(p[0]) << 24 |
u4(p[1]) << 16 |
u4(p[2]) << 8 |
u4(p[3]);
}
static inline u8 get_Java_u8(address p) {
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_Java_u2(address p, u2 x) {
p[0] = x >> 8;
p[1] = x;
}
static inline void put_Java_u4(address p, u4 x) {
((u1*)p)[0] = x >> 24;
((u1*)p)[1] = x >> 16;
((u1*)p)[2] = x >> 8;
((u1*)p)[3] = x;
}
static inline void put_Java_u8(address p, u8 x) {
((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;
}
#ifdef VM_LITTLE_ENDIAN
static inline u2 get_native_u2(address p) {
return (intptr_t(p) & 1) == 0 ? *(u2*)p : u2(p[0]) | (u2(p[1]) << 8);
}
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]) |
u4(((u2*)p)[1]) << 16;
default: return u4(p[0]) |
u4(p[1]) << 8 |
u4(p[2]) << 16 |
u4(p[3]) << 24;
}
}
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]) |
u8(((u4*)p)[1]) << 32;
case 2: return u8(((u2*)p)[0]) |
u8(((u2*)p)[1]) << 16 |
u8(((u2*)p)[2]) << 32 |
u8(((u2*)p)[3]) << 48;
default: return u8(p[0]) |
u8(p[1]) << 8 |
u8(p[2]) << 16 |
u8(p[3]) << 24 |
u8(p[4]) << 32 |
u8(p[5]) << 40 |
u8(p[6]) << 48 |
u8(p[7]) << 56;
}
}
static inline void put_native_u2(address p, u2 x) {
if ((intptr_t(p) & 1) == 0) {
*(u2*)p = x;
} else {
p[0] = x;
p[1] = x >> 8;
}
}
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;
((u2*)p)[1] = x >> 16;
break;
default: ((u1*)p)[0] = x;
((u1*)p)[1] = x >> 8;
((u1*)p)[2] = x >> 16;
((u1*)p)[3] = x >> 24;
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;
((u4*)p)[1] = x >> 32;
break;
case 2: ((u2*)p)[0] = x;
((u2*)p)[1] = x >> 16;
((u2*)p)[2] = x >> 32;
((u2*)p)[3] = x >> 48;
break;
default: ((u1*)p)[0] = x;
((u1*)p)[1] = x >> 8;
((u1*)p)[2] = x >> 16;
((u1*)p)[3] = x >> 24;
((u1*)p)[4] = x >> 32;
((u1*)p)[5] = x >> 40;
((u1*)p)[6] = x >> 48;
((u1*)p)[7] = x >> 56;
}
}
#else
static inline u2 get_native_u2(address p) { return get_Java_u2(p); }
static inline u4 get_native_u4(address p) { return get_Java_u4(p); }
static inline u8 get_native_u8(address p) { return get_Java_u8(p); }
static inline void put_native_u2(address p, u2 x) { put_Java_u2(p, x); }
static inline void put_native_u4(address p, u4 x) { put_Java_u4(p, x); }
static inline void put_native_u8(address p, u8 x) { put_Java_u8(p, x); }
#endif // VM_LITTLE_ENDIAN
// Efficient swapping of byte ordering
static inline u2 swap_u2(u2 x);
static inline u4 swap_u4(u4 x);
static inline u8 swap_u8(u8 x);
};
// The following header contains the implementations of swap_u2, swap_u4, and swap_u8
#include OS_CPU_HEADER(bytes)
#endif // CPU_ARM_BYTES_ARM_HPP
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