sys/arch/alpha/include/bwx.h

   1 /* $NetBSD: bwx.h,v 1.5 2006/02/16 20:17:13 perry 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 u_int8_t
  45 alpha_ldbu(volatile u_int8_t *a0)
  46 {
  47         u_int8_t v0;
  48
  49         __asm volatile("ldbu %0, %1"
  50                 : "=r" (v0)
  51                 : "m" (*a0));
  52
  53         return (v0);
  54 }
  55
  56 static __inline u_int16_t
  57 alpha_ldwu(volatile u_int16_t *a0)
  58 {
  59         u_int16_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 u_int8_t *a0, u_int8_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 u_int16_t *a0, u_int16_t a1)
  79 {
  80
  81         __asm volatile("stw %1, %0"
  82                 : "=m" (*a0)
  83                 : "r" (a1));
  84 }
  85
  86 static __inline u_int8_t
  87 alpha_sextb(u_int8_t a0)
  88 {
  89         u_int8_t v0;
  90
  91         __asm volatile("sextb %1, %0"
  92                 : "=r" (v0)
  93                 : "r" (a0));
  94
  95         return (v0);
  96 }
  97
  98 static __inline u_int16_t
  99 alpha_sextw(u_int16_t a0)
 100 {
 101         u_int16_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_ */