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      1  1.12  christos /*	$NetBSD: byte_swap.h,v 1.12 2017/01/14 16:21:28 christos Exp $	*/
      2   1.1    bouyer 
      3   1.1    bouyer /*
      4   1.1    bouyer  * Copyright (c) 1987, 1991 Regents of the University of California.
      5   1.1    bouyer  * All rights reserved.
      6   1.1    bouyer  *
      7   1.1    bouyer  * Redistribution and use in source and binary forms, with or without
      8   1.1    bouyer  * modification, are permitted provided that the following conditions
      9   1.1    bouyer  * are met:
     10   1.1    bouyer  * 1. Redistributions of source code must retain the above copyright
     11   1.1    bouyer  *    notice, this list of conditions and the following disclaimer.
     12   1.1    bouyer  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1    bouyer  *    notice, this list of conditions and the following disclaimer in the
     14   1.1    bouyer  *    documentation and/or other materials provided with the distribution.
     15   1.6       agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1    bouyer  *    may be used to endorse or promote products derived from this software
     17   1.1    bouyer  *    without specific prior written permission.
     18   1.1    bouyer  *
     19   1.1    bouyer  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1    bouyer  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1    bouyer  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1    bouyer  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1    bouyer  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1    bouyer  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1    bouyer  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1    bouyer  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1    bouyer  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1    bouyer  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1    bouyer  * SUCH DAMAGE.
     30   1.1    bouyer  *
     31   1.1    bouyer  *      @(#)endian.h    7.8 (Berkeley) 4/3/91
     32   1.1    bouyer  */
     33   1.1    bouyer 
     34   1.1    bouyer #ifndef _VAX_BYTE_SWAP_H_
     35   1.1    bouyer #define _VAX_BYTE_SWAP_H_
     36  1.11     skrll 
     37  1.10       dsl #ifdef __GNUC__
     38  1.10       dsl #include <sys/types.h>
     39  1.10       dsl __BEGIN_DECLS
     40   1.4      matt 
     41  1.10       dsl #define	__BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
     42   1.9     perry static __inline uint32_t __attribute__((__unused__))
     43  1.10       dsl __byte_swap_u32_variable(uint32_t x)
     44   1.3   thorpej {
     45   1.3   thorpej 	uint32_t y;
     46   1.3   thorpej 
     47   1.8     perry 	__asm volatile(
     48   1.3   thorpej 		"rotl	$-8, %1, %0	\n"
     49   1.3   thorpej 		"insv	%0, $16, $8, %0	\n"
     50   1.5      matt 		"rotl	$8, %1, %%r1	\n"
     51   1.5      matt 		"movb	%%r1, %0"
     52   1.3   thorpej 		: "=&r" (y)
     53   1.3   thorpej 		: "r" (x)
     54   1.3   thorpej 		: "r1", "cc");
     55   1.3   thorpej 
     56   1.3   thorpej 	return (y);
     57   1.3   thorpej }
     58   1.3   thorpej 
     59  1.10       dsl #define	__BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
     60   1.9     perry static __inline uint16_t __attribute__((__unused__))
     61  1.10       dsl __byte_swap_u16_variable(uint16_t x)
     62   1.3   thorpej {
     63   1.3   thorpej 
     64  1.12  christos 	return (uint16_t)(x << 8 | x >> 8);
     65   1.3   thorpej }
     66   1.1    bouyer 
     67  1.10       dsl __END_DECLS
     68  1.10       dsl #endif
     69   1.1    bouyer #endif /* _VAX_BYTE_SWAP_H_ */
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