byte_swap.h revision 1.7.82.1
1 1.7.82.1 skrll /* $NetBSD: byte_swap.h,v 1.7.82.1 2008/10/27 08:02:41 skrll Exp $ */ 2 1.1 fredette 3 1.7.82.1 skrll /* $OpenBSD: endian.h,v 1.8 2004/04/07 18:24:19 mickey Exp $ */ 4 1.1 fredette 5 1.1 fredette /* 6 1.7.82.1 skrll * Copyright (c) 1998-2004 Michael Shalayeff 7 1.1 fredette * All rights reserved. 8 1.1 fredette * 9 1.1 fredette * Redistribution and use in source and binary forms, with or without 10 1.1 fredette * modification, are permitted provided that the following conditions 11 1.1 fredette * are met: 12 1.1 fredette * 1. Redistributions of source code must retain the above copyright 13 1.1 fredette * notice, this list of conditions and the following disclaimer. 14 1.1 fredette * 2. Redistributions in binary form must reproduce the above copyright 15 1.1 fredette * notice, this list of conditions and the following disclaimer in the 16 1.1 fredette * documentation and/or other materials provided with the distribution. 17 1.1 fredette * 18 1.1 fredette * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 1.1 fredette * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 1.1 fredette * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 1.7.82.1 skrll * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 1.7.82.1 skrll * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 1.7.82.1 skrll * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.7.82.1 skrll * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.7.82.1 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 1.7.82.1 skrll * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 1.7.82.1 skrll * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 1.7.82.1 skrll * THE POSSIBILITY OF SUCH DAMAGE. 29 1.1 fredette */ 30 1.1 fredette 31 1.1 fredette #ifndef _HPPA_BYTE_SWAP_H_ 32 1.1 fredette #define _HPPA_BYTE_SWAP_H_ 33 1.1 fredette 34 1.6 dsl #ifdef __GNUC__ 35 1.6 dsl #include <sys/types.h> 36 1.6 dsl __BEGIN_DECLS 37 1.1 fredette 38 1.6 dsl 39 1.6 dsl #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable 40 1.6 dsl static __inline uint32_t __byte_swap_u32_variable(uint32_t); 41 1.6 dsl static __inline uint32_t 42 1.6 dsl __byte_swap_u32_variable(uint32_t x) 43 1.1 fredette { 44 1.7 dsl register uint32_t __swap32md_x; \ 45 1.1 fredette \ 46 1.2 matt __asm ("extru %1, 7,8,%%r22\n\t" \ 47 1.1 fredette "shd %1,%1,8,%0\n\t" \ 48 1.1 fredette "dep %0,15,8,%0\n\t" \ 49 1.2 matt "dep %%r22,31,8,%0" \ 50 1.1 fredette : "=&r" (__swap32md_x) \ 51 1.2 matt : "r" (x) : "r22"); \ 52 1.1 fredette return(__swap32md_x); 53 1.1 fredette } 54 1.1 fredette 55 1.1 fredette #if 0 56 1.1 fredette /* 57 1.5 perry * Use generic C version because w/ asm __inline below 58 1.1 fredette * gcc inserts extra "extru r,31,16,r" to convert 59 1.1 fredette * to 16 bit entity, which produces overhead we don't need. 60 1.1 fredette * Besides, gcc does swap16 same way by itself. 61 1.1 fredette */ 62 1.1 fredette #define __swap16md(x) __swap16gen(x) 63 1.1 fredette #else 64 1.6 dsl #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable 65 1.6 dsl static __inline uint16_t __byte_swap_u16_variable(uint16_t); 66 1.6 dsl static __inline uint16_t 67 1.6 dsl __byte_swap_u16_variable(uint16_t x) 68 1.1 fredette { 69 1.7 dsl register uint16_t __swap16md_x; \ 70 1.1 fredette \ 71 1.1 fredette __asm ("extru %1,23,8,%0\n\t" \ 72 1.1 fredette "dep %1,23,8,%0" \ 73 1.1 fredette : "=&r" (__swap16md_x) : "r" (x)); \ 74 1.1 fredette return(__swap16md_x); 75 1.1 fredette } 76 1.1 fredette #endif 77 1.1 fredette 78 1.6 dsl __END_DECLS 79 1.6 dsl #endif 80 1.6 dsl 81 1.1 fredette #endif /* !_HPPA_BYTE_SWAP_H_ */ 82
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