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
alpha_ldbu(volatile uint8_t * a0)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
alpha_ldwu(volatile uint16_t * a0)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
alpha_stb(volatile uint8_t * a0,uint8_t a1)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
alpha_stw(volatile uint16_t * a0,uint16_t a1)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
alpha_sextb(uint8_t a0)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
alpha_sextw(uint16_t a0)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