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      1 /* $NetBSD: bwx.h,v 1.7 2012/02/06 02:14:13 matt 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  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _ALPHA_BWX_H_
     34 #define	_ALPHA_BWX_H_
     35 
     36 /*
     37  * Alpha Byte/Word Extension instructions.
     38  *
     39  * These instructions are available on EV56 (21164A) and later processors.
     40  *
     41  * See "Alpha Architecture Handbook, Version 3", DEC order number EC-QD2KB-TE.
     42  */
     43 
     44 static __inline uint8_t
     45 alpha_ldbu(volatile uint8_t *a0)
     46 {
     47 	uint8_t v0;
     48 
     49 	__asm volatile("ldbu %0, %1"
     50 		: "=r" (v0)
     51 		: "m" (*a0));
     52 
     53 	return (v0);
     54 }
     55 
     56 static __inline uint16_t
     57 alpha_ldwu(volatile uint16_t *a0)
     58 {
     59 	uint16_t v0;
     60 
     61 	__asm volatile("ldwu %0, %1"
     62 		: "=r" (v0)
     63 		: "m" (*a0));
     64 
     65 	return (v0);
     66 }
     67 
     68 static __inline void
     69 alpha_stb(volatile uint8_t *a0, uint8_t a1)
     70 {
     71 
     72 	__asm volatile("stb %1, %0"
     73 		: "=m" (*a0)
     74 		: "r" (a1));
     75 }
     76 
     77 static __inline void
     78 alpha_stw(volatile uint16_t *a0, uint16_t a1)
     79 {
     80 
     81 	__asm volatile("stw %1, %0"
     82 		: "=m" (*a0)
     83 		: "r" (a1));
     84 }
     85 
     86 static __inline uint8_t
     87 alpha_sextb(uint8_t a0)
     88 {
     89 	uint8_t v0;
     90 
     91 	__asm volatile("sextb %1, %0"
     92 		: "=r" (v0)
     93 		: "r" (a0));
     94 
     95 	return (v0);
     96 }
     97 
     98 static __inline uint16_t
     99 alpha_sextw(uint16_t a0)
    100 {
    101 	uint16_t v0;
    102 
    103 	__asm volatile("sextw %1, %0"
    104 		: "=r" (v0)
    105 		: "r" (a0));
    106 
    107 	return (v0);
    108 }
    109 
    110 #endif /* _ALPHA_BWX_H_ */
    111