1 /* $NetBSD: bwx.h,v 1.3 2000/06/08 02:55:37 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 52 alpha_ldbu(__volatile u_int8_t *a0) 53 { 54 u_int8_t v0; 55 56 __asm __volatile("ldbu %0, %1" 57 : "=r" (v0) 58 : "m" (*a0)); 59 60 return (v0); 61 } 62 63 static __inline u_int16_t 64 alpha_ldwu(__volatile u_int16_t *a0) 65 { 66 u_int16_t v0; 67 68 __asm __volatile("ldwu %0, %1" 69 : "=r" (v0) 70 : "m" (*a0)); 71 72 return (v0); 73 } 74 75 static __inline void 76 alpha_stb(__volatile u_int8_t *a0, u_int8_t a1) 77 { 78 79 __asm __volatile("stb %1, %0" 80 : "=m" (*a0) 81 : "r" (a1)); 82 } 83 84 static __inline void 85 alpha_stw(__volatile u_int16_t *a0, u_int16_t a1) 86 { 87 88 __asm __volatile("stw %1, %0" 89 : "=m" (*a0) 90 : "r" (a1)); 91 } 92 93 static __inline u_int8_t 94 alpha_sextb(u_int8_t a0) 95 { 96 u_int8_t v0; 97 98 __asm __volatile("sextb %1, %0" 99 : "=r" (v0) 100 : "r" (a0)); 101 102 return (v0); 103 } 104 105 static __inline u_int16_t 106 alpha_sextw(u_int16_t a0) 107 { 108 u_int16_t v0; 109 110 __asm __volatile("sextw %1, %0" 111 : "=r" (v0) 112 : "r" (a0)); 113 114 return (v0); 115 } 116 117 #endif /* _ALPHA_BWX_H_ */ 118