| 2aa62f2b |
1 | /* $NetBSD: byte_swap.h,v 1.10 2006/01/30 22:46:36 dsl Exp $ */\r |
| 2 | \r |
| 3 | /*-\r |
| 4 | * Copyright (c) 1998 The NetBSD Foundation, Inc.\r |
| 5 | * All rights reserved.\r |
| 6 | *\r |
| 7 | * This code is derived from software contributed to The NetBSD Foundation\r |
| 8 | * by Charles M. Hannum.\r |
| 9 | *\r |
| 10 | * Redistribution and use in source and binary forms, with or without\r |
| 11 | * modification, are permitted provided that the following conditions\r |
| 12 | * are met:\r |
| 13 | * 1. Redistributions of source code must retain the above copyright\r |
| 14 | * notice, this list of conditions and the following disclaimer.\r |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright\r |
| 16 | * notice, this list of conditions and the following disclaimer in the\r |
| 17 | * documentation and/or other materials provided with the distribution.\r |
| 18 | * 3. All advertising materials mentioning features or use of this software\r |
| 19 | * must display the following acknowledgement:\r |
| 20 | * This product includes software developed by the NetBSD\r |
| 21 | * Foundation, Inc. and its contributors.\r |
| 22 | * 4. Neither the name of The NetBSD Foundation nor the names of its\r |
| 23 | * contributors may be used to endorse or promote products derived\r |
| 24 | * from this software without specific prior written permission.\r |
| 25 | *\r |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS\r |
| 27 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\r |
| 28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r |
| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS\r |
| 30 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r |
| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r |
| 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r |
| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r |
| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r |
| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r |
| 36 | * POSSIBILITY OF SUCH DAMAGE.\r |
| 37 | */\r |
| 38 | \r |
| 39 | #ifndef _I386_BYTE_SWAP_H_\r |
| 40 | #define _I386_BYTE_SWAP_H_\r |
| 41 | \r |
| 42 | #include <sys/types.h>\r |
| 43 | \r |
| 44 | #if defined(_KERNEL_OPT)\r |
| 45 | #include "opt_cputype.h"\r |
| 46 | #endif\r |
| 47 | \r |
| 48 | #ifdef __GNUC__\r |
| 49 | #include <sys/types.h>\r |
| 50 | __BEGIN_DECLS\r |
| 51 | \r |
| 52 | #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable\r |
| 53 | static __inline uint32_t __byte_swap_u32_variable(uint32_t);\r |
| 54 | static __inline uint32_t\r |
| 55 | __byte_swap_u32_variable(uint32_t x)\r |
| 56 | {\r |
| 57 | __asm volatile (\r |
| 58 | #if defined(_KERNEL) && !defined(_LKM) && !defined(I386_CPU)\r |
| 59 | "bswap %1"\r |
| 60 | #else\r |
| 61 | "rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1"\r |
| 62 | #endif\r |
| 63 | : "=r" (x) : "0" (x));\r |
| 64 | return (x);\r |
| 65 | }\r |
| 66 | \r |
| 67 | #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable\r |
| 68 | static __inline uint16_t __byte_swap_u16_variable(uint16_t);\r |
| 69 | static __inline uint16_t\r |
| 70 | __byte_swap_u16_variable(uint16_t x)\r |
| 71 | {\r |
| 72 | __asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x)); \r |
| 73 | return (x);\r |
| 74 | }\r |
| 75 | \r |
| 76 | __END_DECLS\r |
| 77 | #endif\r |
| 78 | \r |
| 79 | #endif /* !_I386_BYTE_SWAP_H_ */\r |
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