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/*
* Copyright (c) 1999, 2010, 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 OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP
#define OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP
#ifdef __APPLE__
#include <libkern/OSByteOrder.h>
#endif
#if defined(AMD64)
# if defined(__APPLE__)
# define bswap_16(x) OSSwapInt16(x)
# define bswap_32(x) OSSwapInt32(x)
# define bswap_64(x) OSSwapInt64(x)
# elif defined(__OpenBSD__)
# define bswap_16(x) swap16(x)
# define bswap_32(x) swap32(x)
# define bswap_64(x) swap64(x)
# elif defined(__NetBSD__)
# define bswap_16(x) bswap16(x)
# define bswap_32(x) bswap32(x)
# define bswap_64(x) bswap64(x)
# else
# define bswap_16(x) __bswap16(x)
# define bswap_32(x) __bswap32(x)
# define bswap_64(x) __bswap64(x)
# endif
#endif
// Efficient swapping of data bytes from Java byte
// ordering to native byte ordering and vice versa.
inline u2 Bytes::swap_u2(u2 x) {
#ifdef AMD64
return bswap_16(x);
#else
u2 ret;
__asm__ __volatile__ (
"movw %0, %%ax;"
"xchg %%al, %%ah;"
"movw %%ax, %0"
:"=r" (ret) // output : register 0 => ret
:"0" (x) // input : x => register 0
:"ax", "0" // clobbered registers
);
return ret;
#endif // AMD64
}
inline u4 Bytes::swap_u4(u4 x) {
#ifdef AMD64
return bswap_32(x);
#else
u4 ret;
__asm__ __volatile__ (
"bswap %0"
:"=r" (ret) // output : register 0 => ret
:"0" (x) // input : x => register 0
:"0" // clobbered register
);
return ret;
#endif // AMD64
}
#ifdef AMD64
inline u8 Bytes::swap_u8(u8 x) {
#ifdef SPARC_WORKS
// workaround for SunStudio12 CR6615391
__asm__ __volatile__ (
"bswapq %0"
:"=r" (x) // output : register 0 => x
:"0" (x) // input : x => register 0
:"0" // clobbered register
);
return x;
#else
return bswap_64(x);
#endif
}
#else
// Helper function for swap_u8
inline u8 Bytes::swap_u8_base(u4 x, u4 y) {
return (((u8)swap_u4(x))<<32) | swap_u4(y);
}
inline u8 Bytes::swap_u8(u8 x) {
return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
}
#endif // !AMD64
#endif // OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP
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