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bwx.h revision 1.2 
      1 /* $NetBSD: bwx.h,v 1.2 2000/03/05 18:46:15 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 #ifndef _ALPHA_BWX_H_
     41 #define	_ALPHA_BWX_H_
     42 
     43 /*
     44  * Alpha Byte/Word Extension instructions.
     45  *
     46  * These instructions are available on EV56 (21164A) and later processors.
     47  *
     48  * See "Alpha Architecture Handbook, Version 3", DEC order number EC-QD2KB-TE.
     49  */
     50 
     51 static __inline u_int8_t alpha_ldbu __P((__volatile u_int8_t *))
     52 	__attribute__((__unused__));
     53 static __inline u_int16_t alpha_ldwu __P((__volatile u_int16_t *))
     54 	__attribute__((__unused__));
     55 static __inline void alpha_stb __P((__volatile u_int8_t *, u_int8_t))
     56 	__attribute__((__unused__));
     57 static __inline void alpha_stw __P((__volatile u_int16_t *, u_int16_t))
     58 	__attribute__((__unused__));
     59 static __inline u_int8_t alpha_sextb __P((u_int8_t))
     60 	__attribute__((__unused__));
     61 static __inline u_int16_t alpha_sextw __P((u_int16_t))
     62 	__attribute__((__unused__));
     63 
     64 static __inline u_int8_t
     65 alpha_ldbu(__volatile u_int8_t *a0)
     66 {
     67 	u_int8_t v0;
     68 
     69 	__asm __volatile("ldbu %0, %1"
     70 		: "=r" (v0)
     71 		: "m" (*a0));
     72 
     73 	return (v0);
     74 }
     75 
     76 static __inline u_int16_t
     77 alpha_ldwu(__volatile u_int16_t *a0)
     78 {
     79 	u_int16_t v0;
     80 
     81 	__asm __volatile("ldwu %0, %1"
     82 		: "=r" (v0)
     83 		: "m" (*a0));
     84 
     85 	return (v0);
     86 }
     87 
     88 static __inline void
     89 alpha_stb(__volatile u_int8_t *a0, u_int8_t a1)
     90 {
     91 
     92 	__asm __volatile("stb %1, %0"
     93 		: "=m" (*a0)
     94 		: "r" (a1));
     95 }
     96 
     97 static __inline void
     98 alpha_stw(__volatile u_int16_t *a0, u_int16_t a1)
     99 {
    100 
    101 	__asm __volatile("stw %1, %0"
    102 		: "=m" (*a0)
    103 		: "r" (a1));
    104 }
    105 
    106 static __inline u_int8_t
    107 alpha_sextb(u_int8_t a0)
    108 {
    109 	u_int8_t v0;
    110 
    111 	__asm __volatile("sextb %1, %0"
    112 		: "=r" (v0)
    113 		: "r" (a0));
    114 
    115 	return (v0);
    116 }
    117 
    118 static __inline u_int16_t
    119 alpha_sextw(u_int16_t a0)
    120 {
    121 	u_int16_t v0;
    122 
    123 	__asm __volatile("sextw %1, %0"
    124 		: "=r" (v0)
    125 		: "r" (a0));
    126 
    127 	return (v0);
    128 }
    129 
    130 #endif /* _ALPHA_BWX_H_ */
    131