Mercurial > hg > graal-jvmci-8
diff src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
parents | |
children | 0af5da0c9d9d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp Sun Sep 25 16:03:29 2011 -0700 @@ -0,0 +1,116 @@ +/* + * 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 + +#ifndef _ALLBSD_SOURCE +#include <byteswap.h> +#endif + +#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